Part Number Hot Search : 
HCN5551 V31CP20 ICS92 ANTXV2 HA17393A 0LPLE15 0461K TN805
Product Description
Full Text Search
 

To Download HD6433308 Datasheet File
  If you can't view the Datasheet, Please click here to try to view without PDF Reader .  
　
 

  Datasheet File OCR Text:
 To all our customers
Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp. The semiconductor operations of Mitsubishi Electric and Hitachi were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.) Accordingly, although Hitachi, Hitachi, Ltd., Hitachi Semiconductors, and other Hitachi brand names are mentioned in the document, these names have in fact all been changed to Renesas Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been made to the contents of the document, and these changes do not constitute any alteration to the contents of the document itself.
Renesas Technology Home Page: www.renesas.com
Renesas Technology Corp. Customer Support Dept. April 1, 2003
Renesas Technology Corp.
HITACHI SINGLE-CHIP MICROCOMPUTER H8/330 HD6473308, HD6433308, HD6413308 HARDWARE MANUAL
Preface
The H8/330 is a high-performance single-chip microcomputer ideally suited for embedded control of industrial equipment. Its core is the H8/300 CPU: a high-speed processor. On-chip supporting modules provide memory, I/O, and timer functions, including: * 16K bytes of on-chip ROM * 512 bytes of on-chip RAM * 15 bytes of dual-port RAM for a master-slave interface * Serial I/O * General-purpose I/O ports * A/D converter * Timers Compact, high-performance control systems can be built using the H8/330. The H8/330 is available with either electrically programmable or mask programmable ROM. Manufacturers can use the electrically programmable ZTATTM* (Zero Turn-Around Time) version to get production off to a fast start and make software changes quickly, then switch over to the masked version for full-scale production runs. This manual describes the H8/330 hardware. Refer to the H8/300 Series Programming Manual for a detailed description of the instruction set. * ZTAT is a registered trademark of Hitachi, Ltd.
CONTENTS Section 1. Overview............................................................................................................... 1
1.1 1.2 1.3 Block Diagram...................................................................................................................... Descriptions of Blocks.......................................................................................................... Pin Assignments and Functions............................................................................................ 1.3.1 Pin Arrangement...................................................................................................... 1.3.2 Pin Functions ........................................................................................................... 2 3 6 6 9
Section 2. MCU Operating Modes and Address Space ................................................ 17
2.1 2.2 2.3 Overview............................................................................................................................... Mode Descriptions................................................................................................................ Address Space Map .............................................................................................................. 2.3.1 Access Speed ........................................................................................................... 2.3.2 IOS........................................................................................................................... Mode and System Control Registers (MDCR and SYSCR)................................................. 2.4.1 Mode Control Register (MDCR) - H'FFC5 ............................................................ 2.4.2 System Control Register (SYSCR) - H'FFC4......................................................... 17 18 19 19 19 21 21 22
2.4
Section 3. CPU ........................................................................................................................ 25
3.1 3.2 Overview............................................................................................................................... 3.1.1 Features.................................................................................................................... Register Configuration.......................................................................................................... 3.2.1 General Registers..................................................................................................... 3.2.2 Control Registers ..................................................................................................... 3.2.3 Initial Register Values.............................................................................................. Addressing Modes ................................................................................................................ Data Formats......................................................................................................................... 3.4.1 Data Formats in General Registers.......................................................................... 3.4.2 Memory Data Formats............................................................................................. Instruction Set ....................................................................................................................... 3.5.1 Data Transfer Instructions ....................................................................................... 3.5.2 Arithmetic Operations ............................................................................................. 3.5.3 Logic Operations ..................................................................................................... 3.5.4 Shift Operations....................................................................................................... 3.5.5 Bit Manipulations .................................................................................................... 3.5.6 Branching Instructions............................................................................................. 3.5.7 System Control Instructions .................................................................................... 25 25 26 26 27 28 29 31 32 33 34 36 38 39 39 41 47 49
3.3 3.4
3.5
i
3.6
3.7
3.5.8 Block Data Transfer Instruction .............................................................................. CPU States ............................................................................................................................ 3.6.1 Program Execution State ......................................................................................... 3.6.2 Exception-Handling State........................................................................................ 3.6.3 Power-Down State ................................................................................................... Access Timing and Bus Cycle .............................................................................................. 3.7.1 Access to On-Chip Memory (RAM and ROM) ...................................................... 3.7.2 Access to On-Chip Register Field and External Devices ........................................
50 51 52 52 53 53 53 55
Section 4. Exception Handling............................................................................................ 59
4.1 4.2 Reset ..................................................................................................................................... Interrupts............................................................................................................................... 4.2.1 Interrupt-Related Registers...................................................................................... 4.2.2 External Interrupts ................................................................................................... 4.2.3 Internal Interrupts .................................................................................................... 4.2.4 Interrupt Response Time.......................................................................................... 4.2.5 Note on Stack Handling........................................................................................... 4.2.6 Deferring of Interrupts............................................................................................. 60 63 69 70 71 72 73 75
Section 5. I/O Ports ................................................................................................................ 77
5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 Overview............................................................................................................................... 77 Port 1..................................................................................................................................... 78 Port 2..................................................................................................................................... 81 Port 3..................................................................................................................................... 84 Port 4..................................................................................................................................... 88 Port 5..................................................................................................................................... 91 Port 6..................................................................................................................................... 96 Port 7..................................................................................................................................... 102 Port 8..................................................................................................................................... 104 Port 9..................................................................................................................................... 114
Section 6. 16-Bit Free-Running Timer..............................................................................123
6.1 Overview............................................................................................................................... 123 6.1.1 Features.................................................................................................................... 123 6.1.2 Block Diagram......................................................................................................... 123 6.1.3 Input and Output Pins .............................................................................................. 125 6.1.4 Register Configuration ............................................................................................ 125 Register Descriptions............................................................................................................ 126
6.2
ii
6.2.1 6.2.2 6.2.3
6.3 6.4
6.5 6.6 6.7
Free-Running Counter (FRC) - H'FF92.................................................................. 126 Output Compare Registers A and B (OCRA and OCRB) - H'FF94....................... 127 Input Capture Registers A to D (ICRA to ICRD) - H'FF98, H'FF9A, H'FF9C, H'FF9E ......................................................................... 127 6.2.4 Timer Interrupt Enable Register (TIER) - H'FF90 ................................................. 129 6.2.5 Timer Control/Status Register (TCSR) - H'FF91 ................................................... 131 6.2.6 Timer Control Register (TCR) - H'FF96 ................................................................ 134 6.2.7 Timer Output Compare Control Register (TOCR) - H'FF97.................................. 136 CPU Interface ....................................................................................................................... 137 Operation .............................................................................................................................. 139 6.4.1 FRC Incrementation Timing.................................................................................... 139 6.4.2 Output Compare Timing.......................................................................................... 141 6.4.3 Input Capture Timing .............................................................................................. 142 6.4.4 Setting of FRC Overflow Flag (OVF)..................................................................... 145 Interrupts............................................................................................................................... 146 Sample Application............................................................................................................... 146 Application Notes ................................................................................................................. 147
Section 7. 8-Bit Timers ......................................................................................................... 153
7.1 Overview............................................................................................................................... 153 7.1.1 Features.................................................................................................................... 153 7.1.2 Block Diagram......................................................................................................... 153 7.1.3 Input and Output Pins .............................................................................................. 154 7.1.4 Register Configuration ............................................................................................ 155 Register Descriptions............................................................................................................ 155 7.2.1 Timer Counter (TCNT) - H'FFC8 (TMR0), H'FFD0 (TMR1) ............................... 155 7.2.2 Time Constant Registers A and B (TCORA and TCORB) - H'FFCA and H'FFCB (TMR0), H'FFD2 and H'FFD3 (TMR1) .............................. 156 7.2.3 Timer Control Register (TCR) - H'FFC8 (TMR0), H'FFD0 (TMR1) .................... 156 7.2.4 Timer Control/Status Register (TCSR) - H'FFC9 (TMR0), H'FFD1 (TMR1) ....... 158 Operation .............................................................................................................................. 160 7.3.1 TCNT Incrementation Timing................................................................................. 160 7.3.2 Compare Match Timing........................................................................................... 161 7.3.3 External Reset of TCNT .......................................................................................... 163 7.3.4 Setting of TCSR Overflow Flag .............................................................................. 164 Interrupts............................................................................................................................... 165 Sample Application............................................................................................................... 165 Application Notes ................................................................................................................. 166
7.2
7.3
7.4 7.5 7.6
iii
Section 8. PWM Timers........................................................................................................171
8.1 Overview............................................................................................................................... 171 8.1.1 Features.................................................................................................................... 171 8.1.2 Block Diagram......................................................................................................... 171 8.1.3 Input and Output Pins .............................................................................................. 172 8.1.4 Register Configuration ............................................................................................ 172 Register Descriptions............................................................................................................ 172 8.2.1 Timer Counter (TCNT) - H'FFA2 (PWM0), H'FFA6 (PWM1).............................. 172 8.2.2 Duty Register (DTR) - H'FFA1 (PWM0), H'FFA5 (PWM1) ................................. 173 8.2.3 Timer Control Register (TCR) - H'FFA0 (PWM0), H'FFA4 (PWM1)................... 173 Operation .............................................................................................................................. 175 8.3.1 Timer Incrementation .............................................................................................. 175 8.3.2 PWM Operation....................................................................................................... 176 Application Notes ................................................................................................................. 177
8.2
8.3
8.4
Section 9. Serial Communication Interface ..................................................................... 179
9.1 Overview............................................................................................................................... 179 9.1.1 Features.................................................................................................................... 179 9.1.2 Block Diagram......................................................................................................... 180 9.1.3 Input and Output Pins .............................................................................................. 180 9.1.4 Register Configuration ............................................................................................ 181 Register Descriptions............................................................................................................ 181 9.2.1 Receive Shift Register (RSR) .................................................................................. 181 9.2.2 Receive Data Register (RDR) - H'FFDD................................................................ 182 9.2.3 Transmit Shift Register (TSR)................................................................................. 182 9.2.4 Transmit Data Register (TDR) - H'FFDB............................................................... 182 9.2.5 Serial Mode Register (SMR) - H'FFD8 .................................................................. 183 9.2.6 Serial Control Register (SCR) - H'FFDA ............................................................... 185 9.2.7 Serial Status Register (SSR) - H'FFDC .................................................................. 187 9.2.8 Bit Rate Register (BRR) - H'FFD9 ......................................................................... 189 Operation .............................................................................................................................. 193 9.3.1 Overview ................................................................................................................. 193 9.3.2 Asynchronous Mode................................................................................................ 194 9.3.3 Synchronous Mode .................................................................................................. 198 Interrupts............................................................................................................................... 202 Application Notes ................................................................................................................. 203
9.2
9.3
9.4 9.5
iv
Section 10. A/D Converter ..................................................................................................... 207
10.1 Overview............................................................................................................................... 207 10.1.1 Features.................................................................................................................... 207 10.1.2 Block Diagram......................................................................................................... 208 10.1.3 Input Pins................................................................................................................. 209 10.1.4 Register Configuration ............................................................................................ 209 10.2 Register Descriptions............................................................................................................ 210 10.2.1 A/D Data Registers (ADDR) - H'FFE0 to H'FFE6................................................. 210 10.2.2 A/D Control/Status Register (ADCSR) - H'FFE8 .................................................. 210 10.2.3 A/D Control Register (ADCR) - H'FFEA............................................................... 213 10.3 Operation .............................................................................................................................. 213 10.3.1 Single Mode (SCAN = 0) ........................................................................................ 214 10.3.2 Scan Mode (SCAN = 1) .......................................................................................... 217 10.3.3 Input Sampling Time and A/D Conversion Time.................................................... 220 10.3.4 External Trigger Input Timing................................................................................. 222 10.4 Interrupts............................................................................................................................... 223
Section 11. Dual-Port RAM (Parallel Communication Interface) ............................... 225
11.1 Overview............................................................................................................................... 225 11.1.1 Features.................................................................................................................... 225 11.1.2 Block Diagram......................................................................................................... 226 11.1.3 Input and Output Pins .............................................................................................. 227 11.1.4 Register Configuration ............................................................................................ 227 11.2 Register Descriptions............................................................................................................ 228 11.2.1 Dual Port RAM Enable Bit (DPME)....................................................................... 228 11.2.2 Parallel Communication Data Register 0 (PCDR0) - H'FFF1................................ 230 11.2.3 Parallel Communication Data Registers 1 to 14 - H'FFF2 (PCDR1) to H'FFFF (PCDR1-14).............................................................. 231 11.2.4 Parallel Communication Control/Status Register (PCCSR) - H'FFF0 ................... 231 11.3 Usage .................................................................................................................................... 234 11.3.1 Data Transfer from Master CPU to H8/300 CPU.................................................... 234 11.3.2 Data Transfer from H8/300 CPU to Master CPU.................................................... 235 11.4 Master-Slave Interconnections ............................................................................................. 237
Section 12. RAM.......................................................................................................................239
12.1 Overview............................................................................................................................... 239 12.2 Block Diagram...................................................................................................................... 239 12.3 RAM Enable Bit (RAME) .................................................................................................... 239
v
12.4 Operation .............................................................................................................................. 240 12.4.1 Expanded Modes (Modes 1 and 2) .......................................................................... 240 12.4.2 Single-Chip Mode (Mode 3) ................................................................................... 240
Section 13. ROM.......................................................................................................................241
13.1 Overview............................................................................................................................... 241 13.1.1 Block Diagram......................................................................................................... 242 13.2 PROM Mode......................................................................................................................... 242 13.2.1 PROM Mode Setup ................................................................................................. 242 13.2.2 Socket Adapter Pin Assignments and Memory Map............................................... 243 13.3 Programming ........................................................................................................................ 245 13.3.1 Writing and Verifying .............................................................................................. 245 13.3.2 Notes on Writing...................................................................................................... 249 13.3.3 Reliability of Written Data ...................................................................................... 249 13.3.4 Erasing of Data ........................................................................................................ 250 13.4 Handling of Windowed Packages......................................................................................... 250
Section 14. Power-Down State..............................................................................................253
14.1 Overview............................................................................................................................... 253 14.2 System Control Register: Power-Down Control Bits ........................................................... 254 14.3 Sleep Mode ........................................................................................................................... 255 14.3.1 Transition to Sleep Mode......................................................................................... 256 14.3.2 Exit from Sleep Mode ............................................................................................. 256 14.4 Software Standby Mode........................................................................................................ 256 14.4.1 Transition to Software Standby Mode..................................................................... 257 14.4.2 Exit from Software Standby Mode.......................................................................... 257 14.4.3 Sample Application of Software Standby Mode ..................................................... 257 14.4.4 Application Notes .................................................................................................... 258 14.5 Hardware Standby Mode ...................................................................................................... 259 14.5.1 Transition to Hardware Standby Mode.................................................................... 259 14.5.2 Recovery from Hardware Standby Mode................................................................ 259 14.5.3 Timing Relationships............................................................................................... 260
Section 15. E-Clock Interface................................................................................................261
15.1 Overview............................................................................................................................... 261
Section 16. Clock Pulse Generator.......................................................................................265
16.1 Overview............................................................................................................................... 265
vi
16.1.1 Block Diagram......................................................................................................... 265 16.2 Oscillator Circuit................................................................................................................... 265 16.3 System Clock Divider........................................................................................................... 268
Section 17. Electrical Specifications....................................................................................269
17.1 Absolute Maximum Ratings ................................................................................................. 269 17.2 Electrical Characteristics ...................................................................................................... 269 17.2.1 DC Characteristics................................................................................................... 269 17.2.2 AC Characteristics................................................................................................... 273 17.2.3 A/D Converter Characteristics................................................................................. 277 17.3 MCU Operational Timing..................................................................................................... 278 17.3.1 Bus Timing .............................................................................................................. 278 17.3.2 Control Signal Timing ............................................................................................. 280 17.3.3 16-Bit Free-Running Timer Timing ........................................................................ 283 17.3.4 8-Bit Timer Timing.................................................................................................. 284 17.3.5 Pulse Width Modulation Timer Timing................................................................... 285 17.3.6 Serial Communication Interface Timing ................................................................. 285 17.3.7 I/O Port Timing........................................................................................................ 286 17.3.8 Dual-Port RAM Timing........................................................................................... 287
Appendices Appendix A. CPU Instruction Set......................................................................................289
A.1 Instruction Set List................................................................................................................ 289 A.2 Operation Code Map............................................................................................................. 296 A.3 Number of States Required for Execution............................................................................ 298
Appendix B. Register Field ................................................................................................. 304
B.1 Register Addresses and Bit Names....................................................................................... 304 B.2 Register Descriptions............................................................................................................ 308
Appendix C. Pin States.........................................................................................................337
C.1 Pin States in Each Mode ....................................................................................................... 337
Appendix D. Timing of Transition to and Recovery From Hardware Standby Mode ................................................................................................ 339 Appendix E. Package Dimensions .................................................................................... 340
vii
Table
Table 1-1 Table 1-2 Table 1-3 Table 2-1 Table 2-2 Table 3-1 Table 3-2 Table 3-3 Table 3-4 Table 3-5 Table 3-6 Table 3-7 Table 3-8 Table 3-9 Table 4-1 Table 4-2 Table 4-3 Table 4-4 Table 5-1 Table 5-2 Table 5-3 Table 5-4 Table 5-5 Table 5-6 Table 5-7 Table 5-8 Table 5-9 Table 5-10 Table 5-11 Table 5-12 Table 5-13 Table 5-14 Product Lineup ...................................................................................................... 5 Pin Assignments in Each Operating Mode (1)...................................................... 9 Pin Functions (1) ................................................................................................... 12 Operating Modes ................................................................................................... 17 Mode and System Control Registers..................................................................... 21 Instruction Classification....................................................................................... Data Transfer Instructions ..................................................................................... Arithmetic Instructions.......................................................................................... Logic Operation Instructions................................................................................. Shift Instructions ................................................................................................... Bit-Manipulation Instruction (1) ........................................................................... Branching Instructions .......................................................................................... System Control Instructions .................................................................................. Block Data Transfer Instruction/EEPROM Write Operation................................ Reset and Interrupt Exceptions ............................................................................. Interrupts ............................................................................................................... Registers Read by Interrupt Controller ................................................................. Number of States before Interrupt Service............................................................ 34 36 38 39 39 41 47 49 50 59 64 69 73
Auxiliary Functions of Input/Output Ports............................................................ 78 Functions of Port 1 ................................................................................................ 78 Port 1 Registers ..................................................................................................... 79 Functions of Port 2 ................................................................................................ 81 Port 2 Registers ..................................................................................................... 82 Functions of Port 3 ................................................................................................ 84 Port 3 Registers ..................................................................................................... 85 Port 4 Pin Functions (Mode 1 to 3) ....................................................................... 88 Port 4 Registers ..................................................................................................... 88 Port 5 Pin Functions (Mode 1 to 3) ....................................................................... 91 Port 5 Registers ..................................................................................................... 92 Port 6 Pin Functions .............................................................................................. 96 Port 6 Registers ..................................................................................................... 97 Port 7 Pin Functions (Mode 1 to 3) ....................................................................... 103
viii
Table 5-15 Table 5-16 Table 5-17 Table 5-18 Table 5-19 Table 6-1 Table 6-2 Table 6-3 Table 6-4 Table 7-1 Table 7-2 Table 7-3 Table 7-4 Table 7-5 Table 8-1 Table 8-2 Table 8-3 Table 9-1 Table 9-2 Table 9-3 Table 9-4 Table 9-5 Table 9-6 Table 9-7 Table 9-8 Table 9-9 Table 9-10 Table 10-1 Table 10-2 Table 10-3 Table 10-4 (a) Table 10-4 (b)
Port 7 Registers ..................................................................................................... 103 Port 8 Pin Functions .............................................................................................. 104 Port 8 Registers ..................................................................................................... 104 Port 9 Pin Functions .............................................................................................. 114 Port 9 Registers ..................................................................................................... 114 Input and Output Pins of Free-Running Timer Module ........................................ 125 Register Configuration .......................................................................................... 125 Free-Running Timer Interrupts ............................................................................. 146 Effect of Changing Internal Clock Sources........................................................... 150 Input and Output Pins of 8-Bit Timer ................................................................... 154 8-Bit Timer Registers ............................................................................................ 155 8-Bit Timer Interrupts ........................................................................................... 165 Priority of Timer Output........................................................................................ 168 Effect of Changing Internal Clock Sources........................................................... 169 Output Pins of PWM Timer Module..................................................................... 172 PWM Timer Registers........................................................................................... 172 PWM Timer Parameters for 10MHz System Clock.............................................. 175 SCI Input/Output Pins ........................................................................................... 180 SCI Registers......................................................................................................... 181 Examples of BRR Settings in Asynchronous Mode (1)........................................ 189 Examples of BRR Settings in Synchronous Mode................................................ 192 Communication Formats Used by SCI.................................................................. 193 SCI Clock Source Selection .................................................................................. 193 Data Formats in Asynchronous Mode................................................................... 195 Receive Errors ....................................................................................................... 198 SCI Interrupts ........................................................................................................ 203 SSR Bit States and Data Transfer When Multiple Receive Errors Occur............. 204 A/D Input Pins....................................................................................................... 209 A/D Registers ........................................................................................................ 209 Assignment of Data Registers to Analog Input Channels..................................... 210 A/D Conversion Time (Single Mode) ................................................................... 222 A/D Conversion Time (Scan Mode) ..................................................................... 222
ix
Table 11-1 Table 11-2 Table 12-1 Table 13-1 Table 13-2 Table 13-3 Table 13-4 Table 13-5 Table 13-6 Table 13-7 Table 13-8 Table 14-1 Table 14-2 Table 14-3 Table 16-1 Table 17-1 Table 17-2 Table 17-3 Table 17-4 Table 17-5 Table 17-6 Table 17-7 Table A-1 Table A-2 Table A-3 Table A-4 Table C-1
Dual-Port RAM Input and Output Pins................................................................. 227 Dual-Port RAM Register Configuration ............................................................... 227 System Control Register........................................................................................ 240 On-Chip ROM Usage in Each MCU Mode .......................................................... 241 Selection of PROM Mode ..................................................................................... 242 Recommended Socket Adapters............................................................................ 243 Selection of Sub-Modes in PROM Mode ............................................................. 245 DC Characteristics (When VCC = 6.0V 0.25V, VPP = 12.5V 0.3V, VSS = 0V, Ta=25C 5C) ..................................................................................... 247 AC Characteristics (When VCC = 6.0V 0.25V, VPP = 12.5V 0.3V, Ta=25C 5C) ...................................................................................................... 247 Erasing Conditions ................................................................................................ 250 Recommended Socket for Mounting 84-Pin LCC Package.................................. 251 Power-Down State................................................................................................. 253 System Control Register........................................................................................ 254 Times Set by Standby Timer Select Bits (Unit: ms) ............................................. 255 External Crystal Parameters .................................................................................. 266 Absolute Maximum Ratings.................................................................................. 269 DC Characteristics................................................................................................. 270 Allowable Output Current Sink Values................................................................. 272 Bus Timing ............................................................................................................ 273 Control Signal Timing........................................................................................... 274 Timing Conditions of On-Chip Supporting Modules............................................ 274 A/D Converter Characteristics .............................................................................. 277 Instruction Set ....................................................................................................... 290 Operation Code Map ............................................................................................. 297 Number of States Taken by Each Cycle in Instruction Execution ........................ 298 Number of Cycles in Each Instruction .................................................................. 299 Pin States ............................................................................................................... 337
x
Figure
Figure 1-1 Figure 1-2 Figure 1-3 Figure 1-4 Figure 2-1 Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Figure 3-7 Figure 3-8 Figure 3-9 Figure 3-10 Figure 3-11 Figure 3-12 Figure 3-13 Figure 3-14 Figure 3-15 Figure 3-16 Figure 3-17(a) Figure 3-17(b) Figure 4-1 Figure 4-2 Figure 4-3 Figure 4-4 Figure 4-5 Figure 4-6 Figure 4-7 Figure 4-8 Figure 5-1 Block Diagram ...................................................................................................... Pin Arrangement (FP-80A, Top View) ................................................................. Pin Arrangement (CP-84, Top View) .................................................................... Pin Arrangement (CG-84, Top View) ................................................................... 2 6 7 8
Address Space Map............................................................................................... 20 CPU Registers ....................................................................................................... Stack Pointer ......................................................................................................... Register Data Formats........................................................................................... Memory Data Formats .......................................................................................... Data Transfer Instruction Codes............................................................................ Arithmetic, Logic, and Shift Instruction Codes .................................................... Bit Manipulation Instruction Codes ...................................................................... Branching Instruction Codes................................................................................. System Control Instruction Codes......................................................................... Block Data Transfer Instruction/EEPROM Write Operation Code ...................... Operating States .................................................................................................... State Transitions .................................................................................................... On-Chip Memory Access Cycle ........................................................................... Pin States during On-Chip Memory Access Cycle ............................................... On-Chip Register Field Access Cycle................................................................... Pin States during On-Chip Register Field Access Cycle ...................................... External Device Access Timing (read) ................................................................. External Device Access Timing (write) ................................................................ Reset Sequence (Mode 2 or 3, Reset Routine in On-Chip ROM)......................... Reset Sequence (Mode 1)...................................................................................... Block Diagram of Interrupt Controller.................................................................. Hardware Interrupt-Handling Sequence................................................................ Timing of Interrupt Sequence................................................................................ Usage of Stack in Interrupt Handling.................................................................... Example of Damage Caused by Setting an Odd Address in R7 ........................... Example of Deferred Interrupt .............................................................................. 26 27 32 33 37 40 46 48 50 51 51 52 54 54 55 56 56 57 61 62 66 67 68 74 75 76
Port 1 Schematic Diagram..................................................................................... 81
xi
Figure 5-2 Figure 5-3 Figure 5-4 Figure 5-5 Figure 5-6 Figure 5-7 Figure 5-8 Figure 5-9 Figure 5-10 Figure 5-11 Figure 5-12 Figure 5-13 Figure 5-14 Figure 5-15 Figure 5-16 Figure 5-17 Figure 5-18 Figure 5-19 Figure 5-20 Figure 5-21 Figure 5-22 Figure 5-23 Figure 5-24 Figure 5-25 Figure 6-1 Figure 6-2 Figure 6-3 Figure 6-4 (a) Figure 6-4 (b) Figure 6-5 Figure 6-6 Figure 6-7 Figure 6-8 Figure 6-9 Figure 6-10 Figure 6-11 Figure 6-12
Port 2 Schematic Diagram..................................................................................... 84 Port 3 Schematic Diagram..................................................................................... 87 Port 4 Schematic Diagram (Pins P40, P42, P43, and P45) ..................................... 90 Port 4 Schematic Diagram (Pins P41, P44, P46, and P47) ..................................... 91 Port 5 Schematic Diagram (Pin P50)..................................................................... 94 Port 5 Schematic Diagram (Pin P51)..................................................................... 95 Port 5 Schematic Diagram (Pin P52)..................................................................... 96 Port 6 Schematic Diagram (Pins P60, P62, P63, P64, and P65).............................. 99 Port 6 Schematic Diagram (Pin P61)..................................................................... 100 Port 6 Schematic Diagram (Pin P66)..................................................................... 101 Port 6 Schematic Diagram (Pin P67)..................................................................... 102 Port 7 Schematic Diagram..................................................................................... 103 Port 8 Schematic Diagram (Pin P80)..................................................................... 108 Port 8 Schematic Diagram (Pin P81)..................................................................... 109 Port 8 Schematic Diagram (Pins P82 and P83)...................................................... 110 Port 8 Schematic Diagram (Pin P84)..................................................................... 111 Port 8 Schematic Diagram (Pin P85)..................................................................... 112 Port 8 Schematic Diagram (Pin P86)..................................................................... 113 Port 9 Schematic Diagram (Pin P90)..................................................................... 117 Port 9 Schematic Diagram (Pins P91 to P92) ........................................................ 118 Port 9 Schematic Diagram (Pins P93 and P94)...................................................... 119 Port 9 Schematic Diagram (Pin P95)..................................................................... 120 Port 9 Schematic Diagram (Pin P96)..................................................................... 121 Port 9 Schematic Diagram (Pin P97)..................................................................... 122 Block Diagram of 16-Bit Free-Running Timer..................................................... 124 Input Capture Buffering ........................................................................................ 128 Minimum Input Capture Pulse Width ................................................................... 128 Write Access to FRC (When CPU Writes H'AA55) ............................................. 138 Read Access to FRC (When FRC Contains H'AA55) .......................................... 139 Increment Timing for Internal Clock Source ........................................................ 140 Increment Timing for External Clock Source ....................................................... 140 Minimum External Clock Pulse Width ................................................................. 140 Setting of Output Compare Flags.......................................................................... 141 Clearing of Output Compare Flag......................................................................... 141 Timing of Output Compare A ............................................................................... 142 Clearing of FRC by Compare-Match A ................................................................ 142 Input Capture Timing (Usual Case) ...................................................................... 143
xii
Figure 6-13 Figure 6-14 Figure 6-15 Figure 6-16 Figure 6-17 Figure 6-18 Figure 6-19 Figure 6-20 Figure 6-21 Figure 6-22 Figure 6-23 Figure 7-1 Figure 7-2 Figure 7-3 Figure 7-4 Figure 7-5 Figure 7-6 Figure 7-7 Figure 7-8 Figure 7-9 Figure 7-10 Figure 7-11 Figure 7-12 Figure 7-13 Figure 7-14 Figure 7-15 Figure 8-1 Figure 8-2 Figure 8-3 Figure 9-1 Figure 9-2 Figure 9-3 Figure 9-4 Figure 9-5 Figure 9-6
Input Capture Timing (1-State Delay)................................................................... 143 Input Capture Timing (1-State Delay, Buffer Mode) ............................................ 143 Buffered Input Capture with Both Edges Selected ............................................... 144 Setting of Input Capture Flag ................................................................................ 144 Clearing of Input Capture Flag.............................................................................. 145 Setting of Overflow Flag (OVF) ........................................................................... 145 Clearing of Overflow Flag .................................................................................... 145 Square-Wave Output (Example) ........................................................................... 146 FRC Write-Clear Contention................................................................................. 147 FRC Write-Increment Contention ......................................................................... 148 Contention between OCR Write and Compare-Match.......................................... 149 Block Diagram of 8-Bit Timer .............................................................................. 154 Count Timing for Internal Clock Input ................................................................. 160 Count Timing for External Clock Input ................................................................ 161 Minimum External Clock Pulse Widths................................................................ 161 Setting of Compare-Match Flags .......................................................................... 162 Clearing of Compare-Match Flags........................................................................ 162 Timing of Timer Output ........................................................................................ 163 Timing of Compare-Match Clear .......................................................................... 163 Timing of External Reset ...................................................................................... 164 Setting of Overflow Flag (OVF) ........................................................................... 164 Clearing of Overflow Flag .................................................................................... 165 Example of Pulse Output....................................................................................... 166 TCNT Write-Clear Contention.............................................................................. 166 TCNT Write-Increment Contention ...................................................................... 167 Contention between TCOR Write and Compare-Match ....................................... 168 Block Diagram of PWM Timer............................................................................. 171 TCNT Increment Timing....................................................................................... 175 PWM Timing......................................................................................................... 176 Block Diagram of Serial Communication Interface.............................................. 180 Data Format in Asynchronous Mode .................................................................... 194 Phase Relationship Between Clock Output and Transmit Data ............................ 195 Data Format in Synchronous Mode ...................................................................... 199 Timing of Interrupt Signal..................................................................................... 203 Sampling Timing (Asynchronous Mode).............................................................. 205
xiii
Figure 10-1 Figure 10-2 Figure 10-3 Figure 10-4 Figure 10-5 Figure 10-6 Figure 11-1 Figure 11-2 Figure 11-3 Figure 11-4 Figure 12-1 Figure 13-1 Figure 13-2 Figure 13-3 Figure 13-4 Figure 13-5 Figure 13-6 Figure 14-1 Figure 14-2 Figure 15-1 Figure 15-2
Block Diagram of A/D Converter ......................................................................... 208 The Response of the A/D Converter ..................................................................... 214 A/D Operation in Single Mode (When Channel 1 is Selected)............................. 216 A/D Operation in Scan Mode (When Channel 0 to 2 are Selected)...................... 219 A/D Conversion Timing........................................................................................ 221 External Trigger Input Timing .............................................................................. 222 Block Diagram of Dual-Port RAM ....................................................................... 226 Parallel Communication Data Register 0 .............................................................. 230 Dual-Port RAM Timing Chart .............................................................................. 236 Interconnection to H8/532 (Example)................................................................... 237 Block Diagram of On-Chip RAM......................................................................... 239 Block Diagram of On-Chip ROM......................................................................... 242 Socket Adapter Pin Assignments .......................................................................... 244 Memory Map in PROM Mode .............................................................................. 245 High-Speed Programming Flowchart.................................................................... 246 PROM Write/Verify Timing.................................................................................. 248 Recommended Screening Procedure..................................................................... 249 Software Standby Mode (when) NMI Timing ...................................................... 258 Hardware Standby Mode Timing .......................................................................... 260 Execution Cycle of Instruction Synchronized with E Clock in Expanded Modes (Maximum Synchronization Delay)......................................... 262 Execution Cycle of Instruction Synchronized with E Clock in Expanded Modes (Minimum Synchronization Delay).......................................... 263 Block Diagram of Clock Pulse Generator............................................................. 265 Connection of Crystal Oscillator (Example)......................................................... 266 Equivalent Circuit of External Crystal .................................................................. 266 Notes on Board Design around External Crystal .................................................. 267 External Clock Input (Example) ........................................................................... 267 Phase Relationship of System Clock and E Clock................................................ 268 Example of Circuit for Driving a Darlington Pair................................................. 272 Example of Circuit for Driving a LED.................................................................. 272
Figure 16-1 Figure 16-2 Figure 16-3 Figure 16-4 Figure 16-5 Figure 16-6 Figure 17-1 Figure 17-2
xiv
Figure 17-3 Figure 17-4 Figure 17-5 Figure 17-6 Figure 17-7 Figure 17-8 Figure 17-9 Figure 17-10 Figure 17-11 Figure 17-12 Figure 17-13 Figure 17-14 Figure 17-15 Figure 17-16 Figure 17-17 Figure 17-18 Figure 17-19 Figure 17-20 Figure 17-21
Output Load Circuit .............................................................................................. 277 Basic Bus Cycle (Without Wait States) in Expanded Modes................................ 278 Basic Bus Cycle (Without 1 Wait States) in Expanded Modes............................. 279 E Clock Bus Cycle ................................................................................................ 280 Reset Input Timing................................................................................................ 280 Interrupt Input Timing........................................................................................... 281 Clock Settling Timing ........................................................................................... 282 Clock Settling Timing for Recovery from Software Standby Mode..................... 283 Free-Running Timer Input/Output Timing............................................................ 283 External Clock Input Timing for Free-Running Timer ......................................... 284 8-Bit Timer Output Timing ................................................................................... 284 8-Bit Timer Clock Input Timing ........................................................................... 284 8-Bit Timer Reset Input Timing ............................................................................ 285 PWM Timer Output Timing.................................................................................. 285 SCI Input/Output Timing (Synchronous Mode) ................................................... 285 SCI Input Clock Timing ........................................................................................ 286 I/O Port Input/Output Timing................................................................................ 286 Dual-Port RAM Read Timing ............................................................................... 287 Dual-Port RAM Write Timing .............................................................................. 288
Appendix E-1 Package Dimensions (CG-84)............................................................................... 340 Appendix E-2 Package Dimensions (CP-84)................................................................................ 340 Appendix E-3 Package Dimensions (FP-80A) ............................................................................. 341
xv
Section 1. Overview
The H8/330 is a single-chip microcomputer with an H8/300 CPU core and a complement of onchip supporting modules. A variety of system functions are integrated onto the H8/330 chip. The H8/300 CPU is a high-speed Hitachi-original processor with an architecture featuring powerful bit-manipulation instructions, ideally suited for realtime control applications. The on-chip supporting modules include 16K bytes of ROM, 512 bytes of RAM, a 16-bit free-running timer, two 8-bit timers, two PWM timers, a serial communication interface, an A/D converter, dual-port RAM, and I/O ports. The H8/330 can operate in single-chip mode or in two expanded modes, depending on the memory requirements of the application. The operating mode is referred to in this manual as the MCU mode (MCU: MicroComputer Unit). The H8/330 is available in a masked ROM version, in an electrically programmable ROM version that can be programmed at the user site, or in a version with no ROM. The no-ROM version can be used only in mode 1. Section 1.1 shows a block diagram of the H8/330. Section 1.2 describes the main features of the blocks. Section 1.3 shows the pin layout and describes the pin functions.
1
1.1 Block Diagram
Figure 1-1 shows a block diagram of the H8/330 chip.
*
STBY VCC VCC VSS VSS VSS VSS VSS VSS VSS
Data bus (Low) PROM (or masked ROM) 16K bytes RAM 512 bytes Dual-port RAM
Serial communication (8 channels)
P20/A8 P21/A9 P22/A10 P23/A11 P24/A12 P25/A13 P26/A14 P27/A15 P60/FTCI P61/FTOA P62/FTIA P63/FTIB P64/FTIC P65/FTID P66/FTOB/IRQ6 P67/IRQ7
Data bus (High)
Address bus
P10/A0 P11/A1 P12/A2 P13/A3 P14/A4 P15/A5 P16/A6 P17/A7
XTAL EXTAL
Port 1
Port 9
Clock pulse generator
CPU H8/300
P90/IRQ2/ADTRG P91/IRQ1 P92/IRQ0 P93/CS/RD P94/OE/WR P95/RDY/AS P96/O P97/WE/WAIT P30/DDB0/D0 P31/DDB1/D1 P32/DDB2/D2 P33/DDB3/D3 P34/DDB4/D4 P35/DDB5/D5 P36/DDB6/D6 P37/DDB7/D7 P80/RS0/E P81/RS1/IOS P82/RS2 P83/RS3 P84/CTxD/IRQ3 P85/CRxD/IRQ4 P86/CSCK/IRQ5
Port 2
16-Bit free-running timer
Port 6
PWM timer (2 channels)
8-Bit A/D converter (8 channels)
Port 4
Port 7
AVCC AVSS
Port 5
P50/ATxD P51/ARxD P52/ASCK
P40/TMCI0 P41/TMO0 P42/TMRI0 P43/TMCI1 P44/TMO1 P45/TMRI1 P46/PW0
* CP-84, CG-84
Figure 1-1. Block Diagram
P70/AN0 P71/AN1 P72/AN2 P73/AN3 P74/AN4 P75/AN5 P76/AN6
2
Port 8
8-Bit timer (2 channels)
Port 3
1.2 Descriptions of Blocks
CPU: The CPU has a high-speed-oriented architecture in which operands are located in general registers. * Two-way general register configuration - Eight 16-bit registers, or - Sixteen 8-bit registers * Streamlined instruction set - Instruction length: 2 or 4 bytes - Register-register arithmetic, logic, and shift operations, including: 8 x 8-bit multiply 16 / 8-bit divide - Extensive bit-manipulation instructions, featuring: Bit accumulator Register-indirect specification of bit positions - Maximum clock rate: 10MHz Register-register add or subtract: 0.2s Register-register multiply or divide: 1.4s
ROM: The 16K-byte on-chip ROM is accessed in two states via a 16-bit bus. Three versions are available: * Masked ROM * Electrically programmable ROM, programmable with a standard PROM writer * No ROM RAM: The 512-byte on-chip RAM is accessed in two states via a 16-bit bus. RAM contents are held in the power-down state. Dual-Port RAM: In single-chip mode, the 15 bytes of dual-port memory can be accessed by both the on-chip CPU and an external CPU for convenient parallel data transfer in master-slave systems. Serial Communication Interface: The single serial I/O channel offers: * Synchronous or asynchronous communication * Separate input/output pins for the synchronous and asynchronous modes * An on-chip baud rate generator supporting up to megabit-per-second speeds * Serial clock input or output
3
A/D Converter: A/D conversion can be performed in single or scan mode. * Eight-bit resolution * Eight input channels; selection of single mode or scan mode * Conversion can be started by an external trigger signal * Sample-and-hold I/O Ports: Pins not used for other functions are available for general-purpose input and output. I/O is memory-mapped, with the CPU reading and writing the port registers in three states via an 8bit internal bus. * 58 Input/output pins (including 16 pins with LED driving capability) * 8 Input-only pins Interrupts: With a 10MHz clock rate, interrupt response times are on the order of 2 or 3s (when the vector table and stack are located in on-chip memory). * 9 External interrupts: NMI and IRQ0 to IRQ7 * 19 Internal interrupts Free-Running Timer: The time base is a 16-bit free-running counter that can be internally or externally clocked. Applications range from programmable pulse output to counting or timing of external events. * Two independent, comparator-controlled outputs * Four input capture channels * Input capture buffering 8-Bit Timers: Two independent 8-bit timers support applications such as programmable pulse output and external event counting. * Internal or external clocking * Output controlled by values in two compare registers PWM Timers: Two independent timers are provided for pulse-width modulated output. Duty cycles from 0 to 100% can be selected with 1/250 resolution. Power-Down State: In the three power-down modes some or all chip functions are halted but memory contents are retained. * Sleep mode: CPU halts to save power while waiting for an interrupt * Software standby mode: entire chip halts to save power while waiting for an external interrupt * Hardware standby mode: totally shut down, but on-chip RAM contents are held
4
Clock Pulse Generator: The H8/330 can generate its system clock from a crystal oscillator, or can input an external clock signal. E-Clock Interface: An E clock can be output for interfacing to peripheral devices. MCU Modes: The H8/330 has three operating modes: * Mode 1: Expanded mode, on-chip ROM disabled * Mode 2: Expanded mode, on-chip ROM enabled * Mode 3: Single-chip mode Product Lineup: A selection is offered of 80- or 84-pin packages with PROM or masked ROM. See table 1-1. The windowed PROM version is UV-erasable. Table 1-1. Product Lineup Product code HD6473308F HD6473308CP HD6473308CG HD6433308F HD6433308CP HD6413308CP HD6413308F Package 80-Pin QFP (FP-80A) 84-Pin PLCC (CP-84) 84-Pin windowed LCC (CG-84) 80-Pin QFP (FP-80A) 84-Pin PLCC (CP-84) 84-Pin PLCC (CP-84) 80-Pin QFP (FP-80A) On-chip ROM PROM Masked ROM No ROM
5
1.3 Pin Assignments and Functions
1.3.1 Pin Arrangement Figure 1-2 shows the pin arrangement of the FP-80A package. Figure 1-3 shows the pin arrangement of the CP-84 package. Figure 1-4 shows the pin arrangement of the CG-84 package.
71 70 69 68
80 79 78 77 76 75 74
73 72
67 66 65 64 63
RES XTAL EXTAL MD1 MD0 NMI STBY VCC P52/ASCK P51/ARxD P50/ATxD VSS P97/WE/WAIT P96/O P95/RDY/AS P94/OE/WR P93/CS/RD P92/IRQ0 P91/IRQ1 P90/IRQ2/ADTRG
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
62 61
VSS P37/DDB7/D7 P36/DDB6/D6 P35/DDB5/D5 P34/DDB4/D4 P33/DDB3/D3 P32/DDB2/D2 P31/DDB1/D1 P30/DDB0/D0 P10/A0 P11/A1 P12/A2 P13/A3
60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
P14/A4 P15/A5 P16/A6 P17/A7 VSS P20/A8 P21/A9 P22/A10 P23/A11 P24/A12 P25/A13 P26/A14 P27/A15 VCC P47/PW1 P46/PW0 P45/TMRI1 P44/TMO1 P43/TMCI1 P42/TMRI1
Figure 1-2. Pin Arrangement (FP-80A, Top View)
P60/FTCI P61/FTOA P62/FTIA P63/FTIB P64/FTIC P65/FTID P66/FTOB/IRQ 6 P67/IRQ7 AVCC P70/AN0 P71/AN1 P72/AN2 P73/AN3
6
11 10 9 8 7 6 5 4 3 2 1 84 83 82 81 80 79 78
77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54
RES XTAL EXTAL MD1 MD0 NMI STBY VCC P52/ASCK P51/ARxD P50/ATxD VSS VSS P97/WE/WAIT P96/O P95/RDY/AS P94/OE/WR P93/CS/RD P92/IRQ0 P91/IRQ1 P90/IRQ2/ADTRG
VSS P37/DDB7/D7 VSS P36/DDB6/D6 P35/DDB5/D5 P34/DDB4/D4 P33/DDB3/D3 P32/DDB2/D2 P31/DDB1/D1 P30/DDB0/D0 P10/A0 P11/A1 P12/A2 P13/A3
Figure 1-3. Pin Arrangement (CP-84, Top View)
P60/FTCI P61/FTOA P62/FTIA P63/FTIB P64/FTIC P65/FTID P66/FTOB/IRQ 6 P67/IRQ7 VSS AVCC P70/AN0 P71/AN1 P72/AN2 P73/AN3
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
P14/A4 P15/A5 P16/A6 P17/A7 VSS P20/A8 P21/A9 P22/A10 P23/A11 P24/A12 VSS P25/A13 P26/A14 P27/A15 VCC P47/PW1 P46/PW0 P45/TMRI1 P44/TMO1 P43/TMCI1 P42/TMRI0
7
11 10 9 8 7 6 5 4 3 2 1 84 83 82 81 80 79 78
77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54
RES XTAL EXTAL MD1 MD0 NMI STBY VCC P52/ASCK P51/ARxD P50/ATxD VSS VSS P97/WE/WAIT P96/O P95/RDY/AS P94/OE/WR P93/CS/RD P92/IRQ0 P91/IRQ1 P90/IRQ2/ADTRG
VSS P37/DDB7/D7 VSS P36/DDB6/D6 P35/DDB5/D5 P34/DDB4/D4 P33/DDB3/D3 P32/DDB2/D2 P31/DDB1/D1 P30/DDB0/D0 P10/A0 P11/A1 P12/A2 P13/A3
Figure 1-4. Pin Arrangement (CG-84, Top View)
P60/FTCI P61/FTOA P62/FTIA P63/FTIB P64/FTIC P65/FTID P66/FTOB/IRQ 6 P67/IRQ7 VSS AVCC P70/AN0 P71/AN1 P72/AN2 P73/AN3
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
P14/A4 P15/A5 P16/A6 P17/A7 VSS P20/A8 P21/A9 P22/A10 P23/A11 P24/A12 VSS P25/A13 P26/A14 P27/A15 VCC P47/PW1 P46/PW0 P45/TMRI1 P44/TMO1 P43/TMCI1 P42/TMRI0
8
1.3.2 Pin Functions (1) Pin Assignments in Each Operating Mode: Table 1-2 lists the assignments of the pins of the FP-80A, CP-84, and CG-84 packages in each operating mode. The PROM mode is a non-operating mode used for programming the on-chip ROM. See section 13, "ROM" for details. Table 1-2. Pin Assignments in Each Operating Mode (1) Pin No. CP-84 FP CG-84 -80A 1 71 2 -- 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 72 73 74 75 76 77 78 79 80 1 2 3 4 5 6 7 8 9 10 11 Single-chip mode (mode 3) DPRAM DPRAM disabled enabled P36 DDB6 VSS VSS P37 VSS P80 P81 P82 P83 P84 / CTxD /IRQ3 P85 / CRxD /IRQ4 P86 / CSCK /IRQ5 RES XTAL EXTAL MD1 MD0 NMI STBY VCC P52 / ASCK P51 / ARxD P50 / ATxD DDB7 VSS RS0 RS1 RS2 RS3 P84 / CTxD /IRQ3 P85 / CRxD /IRQ4 P86 / CSCK /IRQ5 RES XTAL EXTAL MD1 MD0 NMI STBY VCC P52 / ASCK P51 / ARxD P50 / ATxD Expanded modes (modes 1 and 2) D6 VSS D7 VSS P80* / E P81* /IOS P82 P83 P84 / CTxD /IRQ3 P85 / CRxD /IRQ4 P86 / CSCK /IRQ5 RES XTAL EXTAL MD1 MD0 NMI STBY VCC P52 / ASCK P51 / ARxD P50 / ATxD
PROM mode EO6 VSS EO7 VSS VCC VCC NC NC NC NC NC VPP NC NC VSS VSS EA9 VSS VCC NC NC NC
Note: Pins marked NC should be left unconnected. *Input port only
9
Table 1-2. Pin Assignments in Each Operating Mode (2) Pin No. CP-84 FP CG-84 -80A 23 12 24 -- 25 13 26 14 27 15 28 16 29 17 30 18 31 19 32 20 33 21 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 22 23 24 25 26 27 28 -- 29 30 31 32 33 34 35 36 37 38 39 40 Single-chip mode (mode 3) DPRAM DPRAM disabled enabled VSS VSS VSS VSS P97 WE P96 * / O P96 * / O P95 RDY P94 OE P93 CS P92 / IRQ0 P92 / IRQ0 P91 / IRQ1 P91 / IRQ1 P90 / ADTRG / IRQ2 P90 / ADTRG / IRQ2 P60 / FTCI P60 / FTCI P61 / FTOA P62 / FTIA P63 / FTIB P64 / FTIC P65 / FTID P66 / FTOB /IRQ6 P67 /IRQ7 VSS AVCC P70 / AN0 P71 / AN1 P72 / AN2 P73 / AN3 P74 / AN4 P75 / AN5 P76 / AN6 P77 / AN7 AVSS P40 / TMCI0 P41 / TMO0 P61 / FTOA P62 / FTIA P63 / FTIB P64 / FTIC P65 / FTID P66 / FTOB /IRQ6 P67 /IRQ7 VSS AVCC P70 / AN0 P71 / AN1 P72 / AN2 P73 / AN3 P74 / AN4 P75 / AN5 P76 / AN6 P77 / AN7 AVSS P40 / TMCI0 P41 / TMO0 Expanded modes (modes 1 and 2)
PROM mode VSS VSS VSS VSS WAIT NC O NC AS NC WR NC RD NC P92 / IRQ0 NC P91 / IRQ1 NC P90 / ADTRG / IRQ2 NC P60 / FTCI P61 / FTOA P62 / FTIA P63 / FTIB P64 / FTIC P65 / FTID P66 / FTOB /IRQ6 P67 /IRQ7 VSS AVCC P70 / AN0 P71 / AN1 P72 / AN2 P73 / AN3 P74 / AN4 P75 / AN5 P76 / AN6 P77 / AN7 AVSS P40 / TMCI0 P41 / TMO0 NC NC NC NC NC NC NC NC VSS VCC NC NC NC NC NC NC NC NC VSS NC NC
Note: Pins marked NC should be left unconnected. *Input port only
10
Table 1-2. Pin Assignments in Each Operating Mode (3) Pin No. CP-84 FP CG-84 -80A 54 41 55 42 56 43 57 44 58 45 59 46 60 47 61 48 62 49 63 50 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 -- 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 Single-chip mode (mode 3) DPRAM DPRAM disabled enabled P42 / TMRI0 P42 / TMRI0 P43 / TMCI1 P43 / TMCI1 P44 / TMO1 P44 / TMO1 P45 / TMRI1 P45 / TMRI1 P46 / PW0 P46 / PW0 P47 / PW1 P47 / PW1 VCC VCC P27 P27 P26 P26 P25 P25 VSS P24 P23 P22 P21 P20 VSS P17 P16 P15 P14 P13 P12 P11 P10 P30 P31 P32 P33 P34 P35 VSS P24 P23 P22 P21 P20 VSS P17 P16 P15 P14 P13 P12 P11 P10 DDB0 DDB1 DDB2 DDB3 DDB4 DDB5 Expanded modes (modes 1 and 2) P42 / TMRI0 P43 / TMCI1 P44 / TMO1 P45 / TMRI1 P46 / PW0 P47 / PW1 VCC A15 P27* / A15 A14 P26* / A14 A13 P25* / A13 VSS A12 A11 A10 A9 A8 VSS A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 D4 D5 VSS P24* / A12 P23* / A11 P22* / A10 P21* / A9 P20* / A8 VSS P17* / A7 P16* / A6 P15* / A5 P14* / A4 P13* / A3 P12* / A2 P11* / A1 P10* / A0 D0 D1 D2 D3 D4 D5
PROM mode NC NC NC NC NC NC VCC CE EA14 EA13 VSS EA12 EA11 EA10 OE EA8 VSS EA7 EA6 EA5 EA4 EA3 EA2 EA1 EA0 EO0 EO1 EO2 EO3 EO4 EO5
Note: Pins marked NC should be left unconnected. *Input port only
11
(2) Pin Functions: Table 1-3 gives a concise description of the function of each pin. Table 1-3. Pin Functions (1) Type Power Symbol VCC VSS Clock XTAL I/O I I I Name and function Power: Connected to the power supply (+5V). Connect both VCC pins to the system power supply (+5V). Ground: Connected to ground (0V). Connect all VSS pins to the system power supply (0V). Crystal: Connected to a crystal oscillator. The crystal frequency should be double the desired system clock frequency. If an external clock is input at the EXTAL pin, a reverse-phase clock should be input at the XTAL pin. External crystal: Connected to a crystal oscillator or external clock. The frequency of the external clock should be double the desired system clock frequency. See Section 16.2, "Oscillator Circuit" for examples of connections to a crystal and external clock. System clock: Supplies the system clock to peripheral devices. Enable clock: Supplies an E clock to E clock based peripheral devices. Reset: A Low input causes the H8/330 chip to reset. Standby: A transition to the hardware standby mode (a power-down state) occurs when a Low input is received at the STBY pin. Address bus: Address output pins.
EXTAL
I
O E System control RES STBY
O O I I
Address bus
A15 to A0 O
12
Table 1-3. Pin Functions (2) Type Data bus Bus control Symbol D7 to D0 WAIT RD WR AS IOS I/O I/O I O O O O Name and function Data bus: 8-Bit bidirectional data bus. Wait: Requests the CPU to insert TW states into the bus cycle when an off-chip address is accessed. Read: Goes Low to indicate that the CPU is reading an external address. Write: Goes Low to indicate that the CPU is writing to an external address. Address Strobe: Goes Low to indicate that there is a valid address on the address bus. I/O Select: Goes Low when the CPU accesses addresses H'FF00 to H'FFFF. Can be used as a chip select signal replacing the upper 8 bits of the address bus when external devices are mapped onto addresses H'FF80 to H'FF8F and H'FFA8 to H'FFAF. NonMaskable Interrupt: Highest-priority interrupt request. The NMIEG bit in the system control register determines whether the interrupt is requested on the rising or falling edge of the NMI input. Interrupt Request 0 to 7: Maskable interrupt request pins. Mode: Input pins for setting the MCU operating mode according to the table below. MD1 0 1 1 MD0 1 0 1 Mode Mode 1 Mode 2 Mode 3 Description Expanded mode with on-chip ROM disabled Expanded mode with on-chip ROM enabled Single-chip mode
Interrupt signals
NMI
I
IRQ0 to IRQ7 Operating MD1, mode MD0 control
I I
The inputs at these pins are latched in mode select bits 1 to 0 (MDS1 and MDS0) of the mode register (MDCR) on the rising edge of the RES signal.
13
Table 1-3. Pin Functions (3) Type Symbol Serial com- ATxD munication interface ARxD ASCK CTxD CRxD CSCK 16-Bit free- FTOA, running FTOB timer FTCI FTIA to FTID TMO0, TMO1 TMCI0, TMCI1 TMRI0, TMRI1 PW0, PW1 AN7 to AN0 ADTRG AVCC AVSS I/O Name and function O Asynchronous Transmit Data: Asynchronous data output pin for the serial communication interface. I Asynchronous Receive Data: Asynchronous data input pin for the serial communication interface. I/O Asynchronous Serial ClocK: Input/output pin for the asynchronous serial clock. O Clock-synchronized Transmit Data: Synchronous data output pin for the serial communication interface. I Clock-synchronized Receive Data: Synchronous data input pin for the serial communication interface. I/O Clock-synchronized Serial ClocK: Input/output pin for the synchronous serial clock. O FRT Output compare A and B: Output pins controlled by comparators A and B of the free-running timer. I I O I I O I I I I FRT counter Clock Input: Input pin for an external clock signal for the free-running timer. FRT Input capture A to D: Input capture pins for the free-running timer. 8-bit TiMer Output: Compare-match output pins for the 8-bit timers. 8-bit TiMer counter Clock Input: External clock input pins for the 8-bit timer counters. 8-bit TiMer counter Reset Input: A High input at these pins resets the 8-bit timer counters. PWM timer output (channels 0 and 1): Pulse-width modulation timer output pins. ANalog input: Analog signal input pins. A/D Trigger: External trigger input for starting the A/D converter. Analog reference Voltage: Reference voltage pin for the A/D converter. Analog ground: Ground pin for the A/D converter.
8-Bit timer
PWM timer A/D converter
14
Table 1-3. Pin Functions (4) Type Symbol Dual-port DDB7 RAM to DDB0 CS RS3 to RS0 OE WE RDY Generalpurpose I/O P17 to P10 I/O I/O I I I I O I/O Name and function Dual-port RAM Data Bus: Bidirectional 8-bit bus by which an external CPU can access the dual-port RAM. Chip Select: Input pin for selecting the dual-port RAM. Register Select: Input pins for addressing the dual-port RAM. Output Enable: Enables output on DDB7 to DDB0. Write Enable: Enables writing to the dual-port RAM. ReaDY: For sending an interrupt request signal to an external CPU. NMOS open-drain output. Port 1: An 8-bit input/output port with programmable MOS input pull-ups and LED driving capability. The direction of each bit can be selected in the port 1 data direction register (P1DDR). Port 2: An 8-bit input/output port with programmable MOS input pull-ups and LED driving capability. The direction of each bit can be selected in the port 2 data direction register (P2DDR). Port 3: An 8-bit input/output port with programmable MOS input pull-ups. The direction of each bit can be selected in the port 3 data direction register (P3DDR). Port 4: An 8-bit input/output port with programmable MOS input pull-ups. The direction of each bit can be selected in the port 4 data direction register (P4DDR). Port 5: A 3-bit input/output port with programmable MOS input pull-ups. The direction of each bit can be selected in the port 5 data direction register (P5DDR). Port 6: An 8-bit input/output port with programmable MOS input pull-ups. The direction of each bit can be selected in the port 6 data direction register (P6DDR). Port 7: An 8-bit input port. Port 8: A 7-bit input/output port with programmable MOS input pull-ups. The direction of each bit can be selected in the port 8 data direction register (P8DDR). Port 9: An 8-bit input/output port with programmable MOS input pull-ups. The direction of each bit can be selected in the port 9 data direction register (P9DDR).
P27 to P20
I/O
P37 to P30
I/O
P47 to P40
I/O
P52 to P50
I/O
P67 to P60
I/O
P77 to P70 P86 to P80
I I/O
P97 to P90
I/O
15
Section 2. MCU Operating Modes and Address Space
2.1 Overview
The H8/330 operates in three modes numbered 1, 2, and 3. An additional non-operating mode (mode 0) is used for programming the PROM version of the chip. The mode is selected by the inputs at the mode pins (MD1 and MD0) at the instant when the chip comes out of a reset. As indicated in table 2-1, the mode determines the size of the address space and the usage of on-chip ROM and on-chip RAM. The no-ROM version (HD6413308) can operate only in mode 1 (expanded mode with on-chip ROM disabled). Table 2-1. Operating Modes MD1 Low Low High High MD0 Low High Low High Mode Mode 0 Mode 1 Mode 2 Mode 3 Address space -- Expanded: 64KB Expanded: 64KB Single-chip: about 17KB On-chip ROM -- Disabled Enabled Enabled On-chip RAM -- Enabled* Enabled* Enabled
* In modes 1 and 2, external memory can be accessed instead of on-chip RAM by clearing the RAME bit in the system control register (SYSCR) to "0." Modes 1 and 2 are referred to as "expanded" because they permit access to off-chip memory addresses.
17
2.2 Mode Descriptions
Mode 1 (Expanded Mode without On-Chip ROM): Mode 1 supports a 64K-byte address space most of which is off-chip. In particular, the interrupt vector table is located in off-chip memory. The on-chip ROM and dual-port RAM are not used. Software can select whether to use the on-chip RAM. Ports 1 to 3, 8, and 9 are used for the address and data bus lines and control signals as follows: Ports 1 and 2: Address bus Port 3: Data bus Port 8 (pin 1), port 9 (pins 7, 5, 4, 3): Bus control signals Mode 2 (Expanded Mode with On-Chip ROM): Mode 2 supports a 64K-byte address space of which the first 16K bytes are in on-chip ROM. Software can select whether or not to use the onchip RAM, and can select the usage of pins in ports 1 and 2. Ports 1 and 2: Address bus (see note) Port 3: Data bus Port 8 (pin 1), port 9 (pins 7, 5, 4, 3): Bus control signals Note: In mode 2, ports 1 and 2 are initially general-purpose input ports. Software must change the desired pins to output before using them for the address bus. See section 5, "I/O Ports" for details. Mode 3 (Single-Chip Mode): In this mode all memory is on-chip, in 16K bytes of ROM, 512 bytes of RAM, and internal I/O registers. If enabled by software, the dual-port RAM can be accessed by an external CPU. Since no off-chip memory is accessed, there is no address bus; ports 1 and 2 are available for general-purpose input and output. When the dual-port RAM is enabled, ports 3, 8, and 9 are used as follows: Port 3: Dual-port RAM data bus Port 8 (pins 0 to 3): Dual-port RAM register select Port 9 (pins 7, 5, 4, 3): Dual-port RAM interface signals The mode in which the dual-port RAM is enabled is also called the slave mode.
18
2.3 Address Space Map
Figure 2-1 shows a memory map in each of the three operating modes. The on-chip register field consists of control, status, and data registers for the on-chip supporting modules, I/O ports, and dual-port RAM. Off-chip addresses can be accessed only in the expanded modes. Access to an off-chip address in the single-chip mode does not cause an address error, but all "1" data are returned. 2.3.1 Access Speed On-chip ROM and RAM are accessed a word (16 bits) at a time in two states. (A "state" is one system clock period.) The on-chip register field is accessed a byte at a time in three states. External memory is accessed a byte at a time in three or more states. The basic bus cycle is three states, but additional wait states can be inserted on request. 2.3.2 IOS There are two small gaps in the on-chip address space above the on-chip RAM. Addresses H'FF80 to H'FF8F, situated between the on-chip RAM and register field, are off-chip. Addresses H'FFA8 to H'FFAF are also off-chip. These 24 addresses can be conveniently assigned to external I/O devices. To simplify the addressing of devices at these addresses, an IOS signal is provided that goes Low when the CPU accesses addresses H'FF00 to H'FFFF. The IOS signal can be used in place of the upper 8 bits of the address bus.
19
Mode 1 (on-chip ROM disabled) H'0000 Vector table H'003D H'003E
Mode 2 (on-chip ROM enabled) H'0000 Vector table H'003D H'003E
Mode 3 (single-chip mode) H'0000 Vector table H'003D H'003E
On-chip ROM, 16K bytes
On-chip ROM, 16K bytes
External address space
H'3FFF H'4000
H'3FFF
External address space
H'FD7F H'FD80 On-chip RAM, 512 bytes* H'FF7F H'FF80 H'FF8F H'FF90 H'FFA7 External address space On-chip register field
H'FD7F H'FD80 On-chip RAM, 512 bytes* H'FF7F H'FF80 H'FF8F H'FF90 H'FFA7 External address space On-chip register field
H'FD80 On-chip RAM, 512 bytes H'FF7F
H'FF90 H'FFA7
On-chip register field
H'FFA8 External address space H'FFAF H'FFB0 H'FFFF On-chip register field
H'FFA8 External address space H'FFAF H'FFB0 H'FFFF On-chip register field H'FFB0 H'FFFF On-chip register field
Figure 2-1. Address Space Map * External memory can be accessed at these addresses when the RAME bit in the system control register (SYSCR) is cleared to "0".
20
2.4 Mode and System Control Registers (MDCR and SYSCR)
Two of the control registers in the register field are the mode control register (MDCR) and system control register (SYSCR). The mode control register controls the MCU mode: the operating mode of the H8/330 chip. The system control register has bits that enable or disable the on-chip RAM and dual-port RAM. Table 2-2 lists the attributes of these registers. Table 2-2. Mode and System Control Registers Name Mode control register System control register Abbreviation MDCR SYSCR Read/Write R R/W Address H'FFC5 H'FFC4
2.4.1 Mode Control Register (MDCR) - H'FFC5 Bit 7 6 5 4 -- -- -- -- Initial value 1 1 1 0 Read/Write -- -- -- -- * Initialized according to MD1 and MD0 inputs. 3 -- 0 -- 2 -- 1 -- 1 MDS1 * R 0 MDS0 * R
Bits 7 to 5 and 2--Reserved: These bits cannot be modified and are always read as "1." Bits 4 and 3--Reserved: These bits cannot be modified and are always read as "0." Bits 1 and 0--Mode Select 1 and 0 (MDS1 and MDS0): These bits indicate the values of the mode pins (MD1 and MD0) latched on the rising edge of the RES signal. These bits can be read but not written. Coding example: To test whether the MCU is operating in mode 1: MOV.B @H'FFC5, R0L CMP.B #H'E5, R0L The comparison is with H'E5 instead of H'01 because bits 7, 6, 5, and 2 are always read as "1."
21
2.4.2 System Control Register (SYSCR) - H'FFC4 By setting or clearing the lower two bits of the system control register, software can enable or disable the on-chip RAM and dual-port RAM. The other bits in the system control register concern the software standby mode and the valid edge of the NMI signal. These bits will be described in section 4, "Exception Handling" and section 14, "Power-Down State." Bit Initial value Read/Write 7 SSBY 0 R/W 6 STS2 0 R/W 5 STS1 0 R/W 4 STS0 0 R/W 3 -- 1 -- 2 1 NMIEG DPME 0 0 R/W R/W 0 RAME 1 R/W
Bit 1--Dual-Port RAM Enable (DPME): In the single-chip mode, this bit enables or disables the dual-port RAM. When enabled, the dual-port RAM can be accessed by both an external (master) CPU and the on-chip (slave) CPU. When disabled, the dual-port RAM can be accessed only by the on-chip CPU. This bit affects the usage of ports 3, 8, and 9. Bit 1 DPME 0 1
Description The dual-port RAM is disabled. (Initial state) Single-chip mode: The dual-port RAM is enabled (slave mode). Expanded modes: The dual-port RAM is disabled (but can be accessed by the on-chip CPU).
Bit 0--RAM Enable (RAME): This bit enables or disables the 512-byte on-chip RAM. When enabled, the on-chip RAM occupies addresses H'FD80 to H'FF7F of the address space. When the on-chip RAM is disabled, accesses to these addresses are directed off-chip. The RAME bit is initialized to "1" by a reset, enabling the on-chip RAM. The setting of the RAME bit is not altered in the sleep mode or software standby mode. It should be cleared to "0" before entering the hardware standby mode. See section 14, "Power-Down State." Bit 0 RAME 0 1
Description The on-chip RAM is disabled. The on-chip RAM is enabled.
(Initial state)
22
Coding Examples: To disable the on-chip RAM (in expanded modes): BCLR #0, @H'FFC4 To enable the dual-port RAM (in single-chip mode): BSET #1, @H'FFC4
23
Section 3. CPU
3.1 Overview
The H8/330 chip has the generic H8/300 CPU: an 8-bit central processing unit with a speedoriented architecture featuring sixteen general registers. This section describes the CPU features and functions, including a concise description of the addressing modes and instruction set. For further details on the instructions, see the H8/300 Series Programming Manual. 3.1.1 Features The main features of the H8/300 CPU are listed below. * Two-way register configuration -- Sixteen 8-bit general registers, or -- Eight 16-bit general registers * Instruction set with 57 basic instructions, including: -- Multiply and divide instructions -- Powerful bit-manipulation instructions * Eight addressing modes -- Register direct (Rn) -- Register indirect (@Rn) -- Register indirect with displacement (@(d:16, Rn)) -- Register indirect with post-increment or pre-decrement (@Rn+ or @-Rn) -- Absolute address (@aa:8 or @aa:16) -- Immediate (#xx:8 or #xx:16) -- PC-relative (@(d:8, PC)) -- Memory indirect (@@aa:8) * Maximum 64K-byte address space * High-speed operation -- All frequently-used instructions are executed two to four states -- The maximum clock rate is 10MHz -- 8- or 16-bit register-register add or subtract: 0.2s -- 8 x 8-bit multiply: 1.4s -- 16 / 8-bit divide: 1.4s * Power-down mode -- SLEEP instruction
25
3.2 Register Configuration
Figure 3-1 shows the register structure of the CPU. There are two groups of registers: the general registers and control registers.
7 R0H R1H R2H R3H R4H R5H R6H R7H
07 R0L R1L R2L R3L R4L R5L R6L R7L
0
(SP)
SP: Stack Pointer
15 PC CCR
0 PC: Program Counter 7 5 3 210 I UHUNZ V C CCR: Condition Code Register Carry flag Overflow flag Zero flag Negative flag Half-carry flag Interrupt mask bit User bit User bit
Figure 3-1. CPU Registers 3.2.1 General Registers All the general registers can be used as both data registers and address registers. When used as address registers, the general registers are accessed as 16-bit registers (R0 to R7). When used as data registers, they can be accessed as 16-bit registers, or the high and low bytes can be accessed separately as 8-bit registers. R7 also functions as the stack pointer, used implicitly by hardware in processing interrupts and subroutine calls. In assembly-language coding, R7 can also be denoted by the letters SP. As indicated in figure 3-2, R7 (SP) points to the top of the stack.
26
Unused area SP (R7) Stack area
Figure 3-2. Stack Pointer 3.2.2 Control Registers The CPU control registers include a 16-bit program counter (PC) and an 8-bit condition code register (CCR). (1) Program Counter (PC): This 16-bit register indicates the address of the next instruction the CPU will execute. Each instruction is accessed in 16 bits (1 word), so the least significant bit of the PC is ignored (always regarded as 0). (2) Condition Code Register (CCR): This 8-bit register contains internal status information, including carry (C), overflow (V), zero (Z), negative (N), and half-carry (H) flags and the interrupt mask bit (I). Bit 7--Interrupt Mask Bit (I): When this bit is set to "1," all interrupts except NMI are masked. This bit is set to "1" automatically by a reset and at the start of interrupt handling. Bit 6--User Bit (U): This bit can be written and read by software for its own purposes. Bit 5--Half-Carry (H): This bit is set to "1" when the ADD.B, ADDX.B, SUB.B, SUBX.B, NEG.B, or CMP.B instruction causes a carry or borrow out of bit 3, and is cleared to "0" otherwise. Similarly, it is set to "1" when the ADD.W, SUB.W, or CMP.W instruction causes a carry or borrow out of bit 11, and cleared to "0" otherwise. It is used implicitly in the DAA and DAS instructions. Bit 4--User Bit (U): This bit can be written and read by software for its own purposes. Bit 3--Negative (N): This bit indicates the most significant bit (sign bit) of the result of an instruction.
27
Bit 2--Zero (Z): This bit is set to "1" to indicate a zero result and cleared to "0" to indicate a nonzero result. Bit 1--Overflow (V): This bit is set to "1" when an arithmetic overflow occurs, and cleared to "0" at other times. Bit 0--Carry (C): This bit is used by: * Add and subtract instructions, to indicate a carry or borrow at the most significant bit of the result * Shift and rotate instructions, to store the value shifted out of the most significant or least significant bit * Bit manipulation and bit load instructions, as a bit accumulator
The LDC, STC, ANDC, ORC, and XORC instructions enable the CPU to load and store the CCR, and to set or clear selected bits by logic operations. Some instructions leave some or all of the flag bits unchanged. The action of each instruction on the flag bits is shown in Appendix A-1, "Instruction Set List." See the H8/300 Series Programming Manual for further details.
3.2.3 Initial Register Values When the CPU is reset, the program counter (PC) is loaded from the vector table and the interrupt mask bit (I) in the CCR is set to "1." The other CCR bits and the general registers are not initialized. In particular, the stack pointer (R7) is not initialized. To prevent program crashes the stack pointer should be initialized by software, by the first instruction executed after a reset.
28
3.3 Addressing Modes
The H8/330 supports eight addressing modes. Each instruction uses a subset of these addressing modes. (1) Register Direct--Rn: The register field of the instruction specifies an 8- or 16-bit general register containing the operand. In most cases the general register is accessed as an 8-bit register. Only the MOV.W, ADD.W, SUB.W, CMP.W, ADDS, SUBS, MULXU (8 bits x 8 bits), and DIVXU (16 bits / 8 bits) instructions have 16-bit operands. (2) Register indirect--@Rn: The register field of the instruction specifies a 16-bit general register containing the address of the operand. (3) Register Indirect with Displacement--@(d:16, Rn): This mode, which is used only in MOV instructions, is similar to register indirect but the instruction has a second word (bytes 3 and 4) which is added to the contents of the specified general register to obtain the operand address. For the MOV.W instruction, the resulting address must be even. (4) Register Indirect with Post-Increment or Pre-Decrement--@Rn+ or @-Rn: * Register indirect with Post-Increment--@Rn+ The @Rn+ mode is used with MOV instructions that load registers from memory. It is similar to the register indirect mode, but the 16-bit general register specified in the register field of the instruction is incremented after the operand is accessed. The size of the increment is 1 or 2 depending on the size of the operand: 1 for MOV.B; 2 for MOV.W. For MOV.W, the original contents of the 16-bit general register must be even. * Register Indirect with Pre-Decrement--@-Rn The @-Rn mode is used with MOV instructions that store register contents to memory. It is similar to the register indirect mode, but the 16-bit general register specified in the register field of the instruction is decremented before the operand is accessed. The size of the decrement is 1 or 2 depending on the size of the operand: 1 for MOV.B; 2 for MOV.W. For MOV.W, the original contents of the 16-bit general register must be even.
(5) Absolute Address--@aa:8 or @aa:16: The instruction specifies the absolute address of the operand in memory. The MOV.B instruction uses an 8-bit absolute address of the form H'FFxx. The upper 8 bits are assumed to be 1, so the possible address range is H'FF00 to H'FFFF (65280 to 65535). The MOV.B, MOV.W, JMP, and JSR instructions can use 16-bit absolute addresses.
29
(6) Immediate--#xx:8 or #xx:16: The instruction contains an 8-bit operand in its second byte, or a 16-bit operand in its third and fourth bytes. Only MOV.W instructions can contain 16-bit immediate values. The ADDS and SUBS instructions implicitly contain the value 1 or 2 as immediate data. Some bit manipulation instructions contain 3-bit immediate data (#xx:3) in the second or fourth byte of the instruction, specifying a bit number. (7) PC-Relative--@(d:8, PC): This mode is used to generate branch addresses in the Bcc and BSR instructions. An 8-bit value in byte 2 of the instruction code is added as a sign-extended value to the program counter contents. The result must be an even number. The possible branching range is -126 to +128 bytes (-63 to +64 words) from the current address. (8) Memory Indirect--@@aa:8: This mode can be used by the JMP and JSR instructions. The second byte of the instruction code specifies an 8-bit absolute address from H'0000 to H'00FF (0 to 255). The word located at this address contains the branch address. Note that addresses H'0000 to H'003D (0 to 61) are located in the vector table. If an odd address is specified as a branch destination or as the operand address of a MOV.W instruction, the least significant bit is regarded as "0," causing word access to be performed at the address preceding the specified address. See section 3.4.2, "Memory Data Formats" for further information.
30
3.4 Data Formats
The H8/300 CPU can process 1-bit data, 4-bit (BCD) data, 8-bit (byte) data, and 16-bit (word) data. * Bit manipulation instructions operate on 1-bit data specified as bit n (n = 0, 1, 2, ..., 7) in a byte operand. * All arithmetic and logic instructions except ADDS and SUBS can operate on byte data. * The DAA and DAS instruction perform decimal arithmetic adjustments on byte data in packed BCD form. Each nibble of the byte is treated as a decimal digit. * The MOV.W, ADD.W, SUB.W, CMP.W, ADDS, SUBS, MULXU (8 bits x 8 bits), and DIVXU (16 bits / 8 bits) instructions operate on word data.
31
3.4.1 Data Formats in General Registers Data of all the sizes above can be stored in general registers as shown in figure 3-3.
Data type 1-Bit data
Register No. RnH
Data format 7 0 7 6 5 4 32 1 0 Don't-care
1-Bit data
RnL
Don't-care
7 0 7 6 5 4 32 1 0
7 Byte data RnH
M S B
0
L S B
Don't-care
7 Byte data RnL Don't-care
M S B
0
L S B
15 Word data Rn
M S B
0
L S B
7 4-Bit BCD data RnH
43
0 Don't-care
Upper digit Lower digit
7 4-Bit BCD data RnL Don't-care
43
0
Upper digit Lower digit
Figure 3-3. Register Data Formats Note: RnH: RnL: MSB: LSB:
Upper digit of general register Lower digit of general register Most significant Bit Least significant Bit
32
3.4.2 Memory Data Formats Figure 3-4 indicates the data formats in memory. Word data stored in memory must always begin at an even address. In word access the least significant bit of the address is regarded as "0." If an odd address is specified, no address error occurs but the access is performed at the preceding even address. This rule affects MOV.W instructions and branching instructions, and implies that only even addresses should be stored in the vector table.
Data type Address Data format
1-Bit data Byte data
Address n Address n Even address Odd address Even address Odd address Even address Odd address
CCR: Condition Code Register
7 0 7 6 5 4 32 1 0
M S B L S B
Word data
M S B
Upper 8 bits Lower 8 bits
L S B
Byte data (CCR) on stack
M S B M S B
CCR CCR*
L S B L S B
M S B L S B
Word data on stack
*: Ignored when return
Figure 3-4. Memory Data Formats The stack must always be accessed a word at a time. When the CCR is pushed on the stack, two identical copies of the CCR are pushed to make a complete word. When they are returned, the lower byte is ignored.
33
3.5 Instruction Set
Table 3-1 lists the H8/330 instruction set. Table 3-1. Instruction Classification Function Data transfer Arithmetic operations Logic operations Shift Bit manipulation Branch System control Block data transfer Instructions Types MOV, MOVTPE, MOVFPE, PUSH*1, POP*1 3 ADD, SUB, ADDX, SUBX, INC, DEC, ADDS, SUBS, 14 DAA, DAS, MULXU, DIVXU, CMP, NEG AND, OR, XOR, NOT 4 SHAL, SHAR, SHLL, SHLR, ROTL, ROTR, ROTXL, 8 ROTXR BSET, BCLR, BNOT, BTST, BAND, BIAND, BOR, 14 BIOR, BXOR, BIXOR, BLD, BILD, BST, BIST Bcc*2, JMP, BSR, JSR, RTS 5 RTE, SLEEP, LDC, STC, ANDC, ORC, XORC, NOP 8 EEPMOV 1 Total 57
*1
*2
PUSH Rn is equivalent to MOV.W Rn, @-SP. POP Rn is equivalent to MOV.W @SP+, Rn. Bcc is a conditional branch instruction in which cc represents a condition code.
The following sections give a concise summary of the instructions in each category, and indicate the bit patterns of their object code. The notation used is defined next.
34
Operation Notation Rd Rs Rn, Rm rn, rm (EAd) (EAs) SP PC CCR N Z V C #imm #xx:3 #xx:8 General register (destination) General register (source) General register General register field Effective address: general register or memory location Destination operand Source operand Stack pointer Program counter Condition code register N (negative) bit of CCR Z (zero) bit of CCR V (overflow) bit of CCR C (carry) bit of CCR Immediate data 3-Bit immediate data 8-Bit immediate data #xx:16 op disp abs B W + - x / cc 16-Bit immediate data Operation field Displacement Absolute address Byte Word Addition Subtraction Multiplication Division AND logical OR logical Exclusive OR logical Move Exchange Not Condition field
35
3.5.1 Data Transfer Instructions Table 3-2 describes the data transfer instructions. Figure 3-5 shows their object code formats. Table 3-2. Data Transfer Instructions Instruction MOV Size* B/W Function (EAs) Rd, Rs (EAd) Moves data between two general registers or between a general register and memory, or moves immediate data to a general register. The Rn, @Rn, @(d:16, Rn), @aa:16, #xx:8 or #xx:16, @-Rn, and @Rn+ addressing modes are available for byte or word data. The @aa:8 addressing mode is available for byte data only. The @-R7 and @R7+ modes require word operands. Do not specify byte size for these two modes. Rs (EAd) Transfers data from a general register to memory in synchronization with the E clock. (EAs) Rd Transfers data from memory to a general register in synchronization with the E clock. Rn @-SP Pushes a 16-bit general register onto the stack. Equivalent to MOV.W Rn, @-SP. @SP+ Rn Pops a 16-bit general register from the stack. Equivalent to MOV.W @SP+, Rn.
MOVTPE
B
MOVFPE
B
PUSH
W
POP
W
*
Size: operand size B: Byte W: Word
36
15 Op
8
7 rm rm rm rn rn rn
0
MOV Rm Rn Rn @Rm, or @Rm @(d:16, Rm) Rn, or Rn @(d:16, Rm) @Rm+ Rn, or Rn @-Rm @aa:8 Rn, or Rn @aa:8
Op
Rn
Op disp.
Op
rm rn Op abs. abs.
rn
Op
rn
@aa:16 Rn, or Rn @aa:16 #xx:8 Rn #xx:16 Rn
Op
rn Op #imm.
#imm.
rn
Op abs.
rn
MOVFPE, MOVTPE MOVFPE: d = 0 MOVTPE: d = 1 PUSH, POP
Op Notation Op: d: rm, rn: disp.: abs.: #imm.:
rn
Operation field Direction field (0-load from; 1-store to) Register field Displacement Absolute address Immediate data
Figure 3-5. Data Transfer Instruction Codes
37
3.5.2 Arithmetic Operations Table 3-3 describes the arithmetic instructions. See figure 3-6 in section 3.5.4, "Shift Operations" for their object codes. Table 3-3. Arithmetic Instructions Instruction ADD SUB Size* B/W Function Rd Rs Rd, Rd + #imm Rd Performs addition or subtraction on data in two general registers, or addition on immediate data and data in a general register. Immediate data cannot be subtracted from data in a general register. Word data can be added or subtracted only when both words are in general registers. Rd Rs C Rd, Rd #imm C Rd Performs addition or subtraction with carry or borrow on byte data in two general registers, or addition or subtraction on immediate data and data in a general register. Rd #1 Rd Increments or decrements a general register. Rd #imm Rd Adds or subtracts immediate data to or from data in a general register. The immediate data must be 1 or 2. Rd decimal adjust Rd Decimal-adjusts (adjusts to packed BCD) an addition or subtraction result in a general register by referring to the CCR. Rd x Rs Rd Performs 8-bit x 8-bit unsigned multiplication on data in two general registers, providing a 16-bit result. Rd / Rs Rd Performs 16-bit / 8-bit unsigned division on data in two general registers, providing an 8-bit quotient and 8-bit remainder. Rd - Rs, Rd - #imm Compares data in a general register with data in another general register or with immediate data. Word data can be compared only between two general registers. 0 - Rd Rd Obtains the two's complement (arithmetic complement) of data in a general register.
ADDX SUBX
B
INC DEC ADDS SUBS DAA DAS MULXU
B W
B
B
DIVXU
B
CMP
B/W
NEG
B
*
Size: operand size B: Byte W: Word
38
3.5.3 Logic Operations Table 3-4 describes the four instructions that perform logic operations. See figure 3-6 in section 3.5.4, "Shift Operations" for their object codes. Table 3-4. Logic Operation Instructions Instruction AND Size* B Function Rd Rs Rd, Rd #imm Rd Performs a logical AND operation on a general register and another general register or immediate data. Rd Rs Rd, Rd #imm Rd Performs a logical OR operation on a general register and another general register or immediate data. Rd Rs Rd, Rd #imm Rd Performs a logical exclusive OR operation on a general register and another general register or immediate data. (Rd) (Rd) Obtains the one's complement (logical complement) of general register contents.
OR
B
XOR
B
NOT
B
3.5.4 Shift Operations Table 3-5 describes the eight shift instructions. Figure 3-6 shows the object code formats of the arithmetic, logic, and shift instructions. Table 3-5. Shift Instructions Instruction SHAL SHAR SHLL SHLR ROTL ROTR ROTXL ROTXR * Size* B B B B Function Rd shift Rd Performs an arithmetic shift operation on general register contents. Rd shift Rd Performs a logical shift operation on general register contents. Rd rotate Rd Rotates general register contents. Rd rotate through carry Rd Rotates general register contents through the C (carry) bit.
Size: operand size B: Byte
39
15 Op
8
7 rm rn
0 ADD, SUB, CMP ADDX, SUBX, MULXU, DIVXU
Op
rn
ADDS, SUBS, INC, DEC, DAA, DAS, NEG, NOT
Op
rn
#imm.
ADD, ADDX, SUBX, CMP (#xx:8)
Op
rm rn Op #imm.
rn
AND, OR, XOR (Rm)
Op
AND, OR, XOR (#xx:8)
rn
SHAL, SHAR, SHLL, SHLR, ROTL, ROTR, ROTXL, ROTXR
Notation Op: rm, rn: #imm.:
Operation field Register field Immediate data
Figure 3-6. Arithmetic, Logic, and Shift Instruction Codes
40
3.5.5 Bit Manipulations Table 3-6 describes the bit-manipulation instructions. Figure 3-7 shows their object code formats. Table 3-6. Bit-Manipulation Instructions (1) Instruction BSET Size* B Function 1 ( of ) Sets a specified bit in a general register or memory to "1." The bit is specified by a bit number, given in 3-bit immediate data or the lower three bits of a general register. 0 ( of ) Clears a specified bit in a general register or memory to "0." The bit is specified by a bit number, given in 3-bit immediate data or the lower three bits of a general register. ( of ) ( of ) Inverts a specified bit in a general register or memory. The bit is specified by a bit number, given in 3-bit immediate data or the lower three bits of a general register ( of ) Z Tests a specified bit in a general register or memory and sets or clears the Z flag accordingly. The bit is specified by a bit number, given in 3-bit immediate data or the lower three bits of a general register. C ( of ) C ANDs the C flag with a specified bit in a general register or memory. C [ ( of )] C ANDs the C flag with the inverse of a specified bit in a general register or memory. The bit number is specified by 3-bit immediate data. C ( of ) C ORs the C flag with a specified bit in a general register or memory. C [ ( of )] C ORs the C flag with the inverse of a specified bit in a general register or memory. The bit number is specified by 3-bit immediate data. C ( of ) C XORs the C flag with a specified bit in a general register or memory.
BCLR
B
BNOT
B
BTST
B
BAND BIAND
B
BOR BIOR
B
BXOR
B
*
Size: operand size B: Byte
41
Table 3-6. Bit-Manipulation Instructions (2) Instruction BIXOR Size* B Function C [( of )] C XORs the C flag with the inverse of a specified bit in a general register or memory. The bit number is specified by 3-bit immediate data. ( of ) C Copies a specified bit in a general register or memory to the C flag. ( of ) C Copies the inverse of a specified bit in a general register or memory to the C flag. The bit number is specified by 3-bit immediate data. C ( of ) Copies the C flag to a specified bit in a general register or memory. C ( of ) Copies the inverse of the C flag to a specified bit in a general register or memory. The bit number is specified by 3-bit immediate data.
BLD BILD
B
BST BIST
B
*
Size: operand size B: Byte
Notes on Bit Manipulation Instructions: BSET, BCLR, BNOT, BST, and BIST are read-modifywrite instructions. They read a byte of data, modify one bit in the byte, then write the byte back. Care is required when these instructions are applied to registers with write-only bits and to the I/O port registers. Read Modify Write Read one data byte at the specified address Modify one bit in the data byte Write the modified data byte back to the specified address
Example 1: BCLR is executed to clear bit 0 in the port 4 data direction register (P4DDR) under the following conditions. Input pin, Low, MOS pull-up transistor on P47: P46: Input pin, High, MOS pull-up transistor off P45 - P40: Output pins, Low The intended purpose of this BCLR instruction is to switch P40 from output to input.
42
Before Execution of BCLR Instruction P47 Input Low 0 1 On P46 Input High 0 0 Off P45 Output Low 1 0 Off P44 Output Low 1 0 Off P43 Output Low 1 0 Off P42 Output Low 1 0 Off P41 Output Low 1 0 Off P40 Output Low 1 0 Off
Input/output Pin state DDR DR Pull-up Mos
Execution of BCLR Instruction
BCLR.B #0, @P4DDR
;clear bit 0 in data direction register
After Execution of BCLR Instruction P47 P46 P45 Input/output Output Output Output Pin state Low High Low DDR 1 1 1 DR 1 0 0 Pull-up Mos Off Off Off
P44 Output Low 1 0 Off
P43 Output Low 1 0 Off
P42 Output Low 1 0 Off
P41 Output Low 1 0 Off
P40 Input High 0 0 Off
Explanation: To execute the BCLR instruction, the CPU begins by reading P4DDR. Since P4DDR is a write-only register, it is read as H'FF, even though its true value is H'3F. Next the CPU clears bit 0 of the read data, changing the value to H'FE. Finally, the CPU writes this value (H'FE) back to P4DDR to complete the BCLR instruction. As a result, P40DDR is cleared to "0," making P40 an input pin. In addition, P47DDR and P46DDR are set to "1," making P47 and P46 output pins. Example 2: BSET is executed to set bit 0 in the port 4 data register (P4DR) under the following conditions. P47: Input pin, Low, MOS pull-up transistor on P46: Input pin, High, MOS pull-up transistor off P45 - P40: Output pins, Low The intended purpose of this BSET instruction is to switch the output level at P40 from Low to High.
43
Before Execution of BSET Instruction Input/output Pin state DDR DR Pull-up Mos P47 Input Low 0 1 On P46 Input High 0 0 Off P45 Output Low 1 0 Off P44 Output Low 1 0 Off P43 Output Low 1 0 Off P42 Output Low 1 0 Off P41 Output Low 1 0 Off P40 Output Low 1 0 Off
Execution of BSET Instruction
BSET.B #0, @PORT4
;set bit 0 in data register
After Execution of BSET Instruction P47 Input/output Pin state DDR DR Pull-up Input Low 0 0 Off P46 Input High 0 1 On P45 Output Low 1 0 Off P44 Output Low 1 0 Off P43 Output Low 1 0 Off P42 Output Low 1 0 Off P41 Output Low 1 0 Off P40 Output High 1 1 Off
Explanation: To execute the BSET instruction, the CPU begins by reading port 4. Since P47 and P46 are input pins, the CPU reads the level of these pins directly, not the value in the data register. It reads P47 as Low ("0") and P46 as High ("1"). Since P45 to P40 are output pins, for these pins the CPU reads the value in the data register ("0"). The CPU therefore reads the value of port 4 as H'40, although the actual value in P4DR is H'80. Next the CPU sets bit 0 of the read data to "1," changing the value to H'41. Finally, the CPU writes this value (H'41) back to P4DR to complete the BSET instruction. As a result, bit P40 is set to "1," switching pin P40 to High output. In addition, bits P47 and P46 are both modified, changing the on/off settings of the MOS pull-up transistors of pins P47 and P46. Programming Solution: The switching of the pull-ups for P47 and P46 in example 2 can be avoided by reserving a byte in RAM as a temporary register for P4DR and using it as follows. RAM0 is a symbol for the user-selected address of the temporary register.
44
Before Execution of BSET Instruction
MOV.B MOV.B MOV.B #80, R0L R0L, @RAM0 R0L, @PORT4
;write data (H'80) for data register ;write to DR temporary register (RAM0) ;write to DR P46 Input High 0 0 Off 0 P45 Output Low 1 0 Off 0 P44 Output Low 1 0 Off 0 P43 Output Low 1 0 Off 0 P42 Output Low 1 0 Off 0 P41 Output Low 1 0 Off 0 P40 Output Low 1 0 Off 0
Input/output Pin state DDR DR Pull-up Mos RAM0
P47 Input Low 0 1 On 1
Execution of BSET Instruction
BSET.B #0, @RAM0
;set bit 0 in DR temporary register (RAM0)
After Execution of BSET Instruction
MOV.B MOV.B @RAM0, R0L R0L, @PORT4
;obtain value of temporary register RAM0 ;write value to DR P46 Input High 0 0 Off 0 P45 Output Low 1 0 Off 0 P44 Output Low 1 0 Off 0 P43 Output Low 1 0 Off 0 P42 Output Low 1 0 Off 0 P41 Output Low 1 0 Off 0 P40 Output High 1 1 Off 1
Input/output Pin state DDR DR Pull-up Mos RAM0
P47 Input Low 0 1 On 1
45
15
Op
8
7 #imm. rm rn #imm. rn rm rn rn
0
BSET, BCLR, BNOT, BTST Operand: register direct (Rn) Bit No.: immediate (#xx:3) Operand: register direct (Rn) Bit No.: register direct (Rm)
Op
Op Op
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
Operand: register indirect (@Rn) Bit No.: immediate (#xx:3) Operand: register indirect (@Rn) Bit No.: register direct (Rm)
Op Op
Op Op
#imm.
abs. 00 abs. 00 rn 0 0 0 0
0
0
Operand: absolute (@aa:8) Bit No.: immediate (#xx:3)
Op Op
rm #imm. rn #imm.
0
0
Operand: absolute (@aa:8) Bit No.: register direct (Rm) BAND, BOR, BXOR, BLD, BST Operand: register direct (Rn) Bit No.: immediate (#xx:3)
Op
Op Op
00 00
Operand: register indirect (@Rn) Bit No.: immediate (#xx:3)
Op Op
#imm.
abs. 00 rn 0 0 0 0
0
0
Operand: absolute (@aa:8) Bit No.: immediate (#xx:3) BIAND, BIOR, BIXOR, BILD, BIST Operand: register direct (Rn) Bit No.: immediate (#xx:3)
Op
#imm. rn #imm.
Op Op
0 0
0 0
Operand: register indirect (@Rn) Bit No.: immediate (#xx:3) Operand: absolute (@aa:8) Bit No.: immediate (#xx:3)
Op Op
#imm.
abs. 00
0
0
Notation Op: rm, rn: abs.: #imm.:
Operation field Register field Absolute address Immediate data
Figure 3-7. Bit Manipulation Instruction Codes
46
3.5.6 Branching Instructions Table 3-7 describes the branching instructions. Figure 3-8 shows their object code formats. Table 3-7. Branching Instructions Instruction Bcc Size -- Function Branches if condition cc is true. Mnemonic BRA (BT) BRN (BF) BHI BLS BCC (BHS) BCS (BLO) BNE BEQ BVC BVS BPL BMI BGE BLT BGT BLE JMP JSR BSR RTS -- -- -- -- cc Field 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 Description Always (True) Never (False) High Low or Same Carry Clear (High or Same) Carry Set (Low) Not Equal Equal Overflow Clear Overflow Set Plus Minus Greater or Equal Less Than Greater Than Less or Equal Condition Always Never CZ=0 CZ=1 C=0 C=1 Z=0 Z=1 V=0 V=1 N=0 N=1 NV=0 NV=1 Z (N V) = 0 Z (N V) = 1
Branches unconditionally to a specified address. Branches to a subroutine at a specified address. Branches to a subroutine at a specified displacement from the current address. Returns from a subroutine
47
15 Op Op cc
8
7 disp. rm
0 Bcc
0
0
0
0
JMP (@Rm)
Op abs.
JMP (@aa:16)
Op
abs.
JMP (@@aa:8)
Op rm
disp.
BSR
Op
0
0
0
0
JSR (@Rm)
Op abs.
JSR (@aa:16)
Op
abs.
JSR (@@aa:8)
Op Notation Op: cc: rm: disp.: abs.:
RTS
Operation field Condition field Register field Displacement Absolute address
Figure 3-8. Branching Instruction Codes
48
3.5.7 System Control Instructions Table 3-8 describes the system control instructions. Figure 3-9 shows their object code formats. Table 3-8. System Control Instructions Instruction RTE SLEEP LDC Size -- -- B Function Returns from an exception-handling routine. Causes a transition to the power-down state. Rs CCR, #imm CCR Moves immediate data or general register contents to the condition code register. CCR Rd Copies the condition code register to a specified general register. CCR #imm CCR Logically ANDs the condition code register with immediate data. CCR #imm CCR Logically ORs the condition code register with immediate data. CCR #imm CCR Logically exclusive-ORs the condition code register with immediate data. PC + 2 PC Only increments the program counter.
STC ANDC ORC XORC
B B B B
NOP
--
*
Size: operand size B: Byte
49
15
8
7 Op
0 RTE, SLEEP, NOP
Op
rn
LDC, STC (Rn)
Op
#imm.
ANDC, ORC, XORC, LDC (#xx:8)
Notation Op: rn: #imm.:
Operation field Register field Immediate data
Figure 3-9. System Control Instruction Codes 3.5.8 Block Data Transfer Instruction In the H8/330 the EEPMOV instruction is a block data transfer instruction. It does not have the EEPROM write function it has in some other chips. Table 3-9 describes the EEPMOV instruction. Figure 3-10 shows its object code format. Table 3-9. Block Data Transfer Instruction/EEPROM Write Operation Instruction EEPMOV Size -- Function if R4L 0 then repeat @R5+ @R6+ R4L - 1 R4L until R4L = 0 else next; Moves a data block according to parameters set in general registers R4L, R5, and R6. R4L: size of block (bytes) R5: starting source address R6: starting destination address Execution of the next instruction starts as soon as the block transfer is completed.
50
15
8 Op Op
7
0 EEPROM Notation OP: Operation field
Figure 3-10. Block Data Transfer Instruction/EEPROM Write Operation Code Notes on EEPMOV Instruction 1. The EEPMOV instruction is a block data transfer instruction. It moves the number of bytes specified by R4L from the address specified by R5 to the address specified by R6.
R5 R5 + R4L R6 R6 + R4L
2. When setting R4L and R6, make sure that the final destination address (R6 + R4L) does not exceed H'FFFF. The value in R6 must not change from H'FFFF to H'0000 during execution of the instruction.
R5 R5 + R4L R6 H'FFFF Not allowed R6 + R4L
3.6 CPU States
The CPU has three states: the program execution state, exception-handling state, and power-down state. The power-down state is further divided into three modes: the sleep mode, software standby mode, and hardware standby mode. Figure 3-11 summarizes these states, and figure 3-12 shows a map of the state transitions.
State
Program execution state The CPU executes successive program instructions. Exception-handling state A transient state triggered by a reset or interrupt. The CPU executes a hardware sequence that includes loading the program counter from the vector table. Power-down state A state in which some or all of the chip functions are stopped to conserve power. Sleep mode Software standby mode Hardware standby mode
Figure 3-11. Operating States
51
Exception Exceptionhandling handing request request Exception handling state
Program execution state Exception handing
SLEEP instruction with SSBY bit set SLEEP instruction
Sleep mode Interrupt request
NMI or IRQ0 to IRQ7
RES = 1
Software standby mode Hardware standby mode Power-down state
Reset state
STBY=1 or RES=0
Notes: 1. A transition to the reset state occurs when RES goes Low, except when the chip is in the hardware standby mode. 2. A transition from any state to the hardware standby mode occurs when STBY goes Low.
Figure 3-12. State Transitions 3.6.1 Program Execution State In this state the CPU executes program instructions in sequence. The main program, subroutines, and interrupt-handling routines are all executed in this state. 3.6.2 Exception-Handling State The exception-handling state is a transient state that occurs when the CPU is reset or accepts an interrupt. In this state the CPU carries out a hardware-controlled sequence that prepares it to execute a user-coded exception-handling routine. In the hardware exception-handling sequence the CPU does the following: (1) Saves the program counter and condition code register to the stack (except in the case of a reset). (2) Sets the interrupt mask (I) bit in the condition code register to "1." (3) Fetches the start address of the exception-handling routine from the vector table. (4) Branches to that address, returning to the program execution state. See section 4, "Exception Handling," for further information on the exception-handling state.
52
3.6.3 Power-Down State The power-down state includes three modes: the sleep mode, the software standby mode, and the hardware standby mode. (1) Sleep Mode: The sleep mode is entered when a SLEEP instruction is executed. The CPU halts, but CPU register contents remain unchanged and the on-chip supporting modules continue to function. When an interrupt or reset signal is received, the CPU returns through the exception-handling state to the program execution state. (2) Software Standby Mode: The software standby mode is entered if the SLEEP instruction is executed while the SSBY (Software Standby) bit in the system control register (SYSCR) is set. The CPU and all on-chip supporting modules halt. The on-chip supporting modules are initialized, but the contents of the on-chip RAM and CPU registers remain unchanged. I/O port outputs also remain unchanged. (3) Hardware Standby Mode: The hardware standby mode is entered when the input at the STBY pin goes Low. All chip functions halt, including I/O port output. The on-chip supporting modules are initialized, but on-chip RAM contents are held. See section 14, "Power-Down State" for further information.
3.7 Access Timing and Bus Cycle
The CPU is driven by the system clock (O). The period from one rising edge of the system clock to the next is referred to as a "state." Memory access is performed in a two-or three-state bus cycle as described below. For more detailed timing diagrams of the bus cycles, see section 17, "Electrical Specifications." 3.7.1 Access to On-Chip Memory (RAM and ROM) On-chip ROM and RAM are accessed in a cycle of two states designated T1 and T2. Either byte or word data can be accessed, via a 16-bit data bus. Figure 3-13 shows the on-chip memory access cycle. Figure 3-14 shows the associated pin states.
53
Bus cycle
T1 state
T2 state
O
Internal address bus
Address
Internal Read signal
Internal data bus (read)
Read data
Internal Write signal
Internal data bus (write)
Write data
Figure 3-13. On-Chip Memory Access Cycle
Bus cycle
T1 state
T2 state
O
Address bus
Address
AS: High RD: High WR: High Data bus: high impedance state
Figure 3-14. Pin States during On-Chip Memory Access Cycle
54
3.7.2 Access to On-Chip Register Field and External Devices The on-chip register field (I/O ports, dual-port RAM, on-chip supporting module registers, etc.) and external devices are accessed in a cycle consisting of three states: T1, T2, and T3. Only one byte of data can be accessed per cycle, via an 8-bit data bus. Access to word data or instruction codes requires two consecutive cycles (six states). Wait States: If requested, additional wait states (TW) are inserted between T2 and T3. The WAIT pin is sampled at the center of state T2. If it is Low, a wait state is inserted after T2. The WAIT pin is also sampled at the center of each wait state and if it is still Low, another wait state is inserted. An external device can have any number of wait states inserted by holding WAIT Low for the necessary duration. The bus cycle for the MOVTPE and MOVFPE instructions will be described in section 15, "E-Clock Interface." Figure 3-15 shows the access cycle for the on-chip register field. Figure 3-16 shows the associated pin states. Figures 3-17 (a) and (b) show the read and write access timing for external devices.
Bus cycle
T1 state
T2 state
T3 state
O Internal address bus Internal Read signal Internal data bus (read) Read data Address
Internal Write signal Internal data bus (write) Write data
Figure 3-15. On-Chip Register Field Access Cycle
55
Bus cycle
T1 state
T2 state
T3 state
O
Address bus
Address
AS: High RD: High WR: High Data bus: high impedance state
Figure 3-16. Pin States during On-Chip Register Field Access Cycle
Read cycle
T1 state
T2 state
T3 state
O
Address bus
Address
AS
RD
WR: High
Data bus
Read data
Figure 3-17 (a). External Device Access Timing (read)
56
Write cycle
T1 state
T2 state
T3 state
O
Address bus
Address
AS
RD: High
WR
Data bus
Write data
Figure 3-17 (b). External Device Access Timing (write)
57
Section 4. Exception Handling
As indicated in table 4-1, the H8/330 recognizes only two kinds of exceptions: interrupts (28 sources) and the reset. There are no error or trap exceptions. When an exception occurs the CPU enters the exception-handling state and performs a hardware exception-handling sequence. There are two exception-handling sequences: one for the reset and one for interrupts. In both sequences the CPU: * Sets the interrupt mask (I) bit in the CCR to "1," and * Loads the program counter (PC) from the vector table. After the program counter is loaded, the CPU returns to the program execution state and program execution starts from the new PC address. The vector table occupies addresses H'0000 to H'003D in memory. It consists of word entries giving the addresses of software interrupt-handling routines and the reset routine. The entries are indexed by a vector number associated with the particular exception. For an interrupt, before the PC and CCR are altered as described above, the old PC and CCR contents are pushed on the stack, so that they can be restored when an RTE (Return from Exception ) instruction is executed. If a reset and interrupt occur simultaneously, the reset has priority. There is also a priority order among different types of interrupts. Table 4-1 compares the reset and interrupt exceptions. Table 4-1. Reset and Interrupt Exceptions Item Priority Cause When detected Reset Highest Low RES input Any clock period Interrupt Lower Internal or external interrupt signal At end of current instruction, unless current instruction is ANDC, ORC, XORC, or LDC, or at end of hardware interrupt-handling sequence. At end of current instruction. 3 to 30 H'0006 - H'003D
When handled Vector numbers Vector table
Immediately 0 H'0000 - H'0001
59
4.1 Reset
A reset has the highest exception-handling priority. When the RES pin goes Low, all current processing by the CPU and on-chip supporting modules halts. When RES returns from Low to High, the following hardware reset sequence is executed. (1) (2) (3) (4) The value at the mode pins (MD1 and MD0) is latched in bits MDS1 and MDS0 of the mode register (MDCR). In the condition code register (CCR), the I bit is set to "1" to mask interrupts. The registers of the I/O ports and on-chip supporting modules are initialized. The CPU loads the program counter with the first word in the vector table (stored at addresses H'0000 and H'0001) and starts program execution.
A reset does not initialize the general registers or on-chip RAM. All interrupts, including NMI, are disabled immediately after a reset. The first program instruction, located at the address specified at the top of the vector table, is therefore always executed. This instruction should be a MOV.W instruction initializing the stack pointer (R7). After execution of this instruction, the NMI interrupt is enabled. Other interrupts remain disabled until their enable bits are set to "1" and the interrupt mask is cleared. To ensure correct resetting, at power-on the RES pin should be held Low for at least 20ms. In a reset during operation, the RES pin should be held Low for at least 10 system clock periods. The RES pin should also be held Low when power is switched off. Figure 4-1 indicates the timing of the reset sequence when the vector table and reset routine are located in on-chip ROM. Figure 4-2 indicates the timing when they are in off-chip memory.
60
Vector fetch RES
Internal processing
Instruction prefetch
O
Internal address bus Internal Read signal Internal Write signal Internal data bus (16 bits)
(1)
(2)
(2)
(3)
(1) Reset vector address (H'0000) (2) Starting address of reset routine (contents of H'0000-H'0001) (3) First instruction of reset routine
Figure 4-1. Reset Sequence (Mode 2 or 3, Reset Routine in On-Chip ROM)
61
Vector fetch RES
Internal processing
Instruction prefetch
O
A15 to A0
(1)
(3)
(5)
(7)
RD
WR
D7 to D0 (8 bits)
(2)
(4)
(6)
(8)
(1),(3) Reset vector address: (1)=H'0000, (3)=H'0001 (2),(4) Starting address of reset routine (contents of reset vector): (2)=upper byte, (4)=lower byte (5),(7) Starting address of reset routine: (5)=(2)(4), (7)=(2)(4)+1 (6),(8) First instruction of reset routine: (6)=first byte, (8)=second byte
Figure 4-2. Reset Sequence (Mode 1)
4.2 Interrupts
There are nine input pins for external interrupts (NMI, IRQ0 to IRQ7). There are also 19 internal interrupts originating in the 16-bit free-running timer (FRT), 8-bit timers (TMR0 and TMR1), serial communication interface (SCI), and A/D converter. The features of these interrupts are: * All internal and external interrupts except NMI can be masked by the I bit in the CCR. * IRQ0 to IRQ7 can be edge-sensed or level-sensed. (The falling edge or Low level is active.) The type of sensing can be selected for each interrupt individually. NMI is edge-sensed, and either the rising or falling edge can be selected. * Interrupts are individually vectored. The software interrupt-handling routine does not have to determine what type of interrupt has occurred. Table 4-2 lists all the interrupts in their order of priority and gives their vector numbers and the addresses of their entries in the vector table.
63
Table 4-2. Interrupts Vector No. 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Address of vector H'0006 H'0008 H'000A H'000C H'000E H'0010 H'0012 H'0014 H'0016 H'0018 H'001A H'001C H'001E H'0020 H'0022 H'0024 H'0026 H'0028 H'002A H'002C H'002E H'0030 H'0032 H'0034 H'0036 H'0038 H'003A H'003C
Priority High
Source External interrupts
Low
Interrupt NMI IRQ0 IRQ1 IRQ2 IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 Free-running ICIA (Input capture A) timer ICIB (Input capture B) ICIC (Input capture C) ICID (Input capture D) OCIA (Output compare A) OCIB (Output compare B) FOVI (Overflow) 8-Bit timer 0 CMI0A (Compare-match A) CMI0B (Compare-match B) OVI0 (Overflow) 8-Bit timer 1 CMI1A (Compare-match A) CMI1B (Compare-match B) OVI1 (Overflow) Dual-port MREI (Master read end) RAM MWEI (Master write end) Serial ERI (Receive error) communication RXI (Receive end) interface TXI (Transmit end) A/D converter ADI (Conversion end)
Notes: 1. H'0000 and H'0001 contain the reset vector. 2. H'0002 to H'0005 are reserved by the H8/330 and are not available to the user.
64
Figure 4-3 shows a block diagram of the interrupt controller. Figure 4-4 is a flowchart showing the operation of the interrupt controller and the sequence by which an interrupt is accepted. This sequence is outlined below. (1) The interrupt controller receives an interrupt request signal. Interrupt request signals can be generated by: -- A High-to-Low (or Low-to-High) transition of the NMI signal -- A Low input (or High-to-Low transition) of one of the IRQ0 to IRQ7 signals -- An on-chip supporting module All interrupts except NMI have enable bits. The interrupt can be requested only when its enable bit is set to "1." (2) When notified of an interrupt, the interrupt controller scans the interrupt signals in priority order and selects the one with the highest priority. (See table 4-2 for the priority order.) Other requested interrupts remain pending. (3) The interrupt controller accepts the interrupt if it is an NMI, or if it is another interrupt and the I bit in the CCR is cleared to "0." If the interrupt is not an NMI and the I bit is set to "1," the interrupt is held pending. (4) When an interrupt is accepted, after completion of the current instruction, the CPU pushes first the PC then the CCR onto the stack. The stacked PC indicates the address of the first instruction that will be executed after the return. The stack pointer (R7) must indicate an even address. See section 4.2.5, "Note on Stack Handling" for details. (5) The CPU sets the I bit in the CCR to "1," masking all further interrupts except NMI during the interrupt-handling routine. (6) The CPU generates the vector address of the interrupt and loads the word at this address into the program counter. (7) Execution of the software interrupt-handling routine starts from the address now in the program counter. (8) On the return from the interrupt-handling routine (RTE instruction), the CCR and PC are popped from the stack and execution of the interrupted program resumes. The timing of this sequence is shown in Figure 4-5 for the case in which the program and vector table are in on-chip ROM and the stack is in on-chip RAM.
65
NMI Priority decision logic
Interrupt controller
NMI request
External (IRQ0 to IRQ7) or internal interrupt
Interrupt request
External (IRQ0 to IRQ7) or internal interrupt enable signal
I CCR in CPU
Figure 4-3. Block Diagram of Interrupt Controller
66
Program execution
Interrupt request present? Y NMI? Y N IRQ0 ? Y N N
N
IRQ1 ? Y
ADI? Y
I=0 in CCR? Y Save PC Save CCR
N Pending
PC: Program Counter CCR: Condition Code Register
I 1, masking all interrupts except NMI
I: Interrupt mask bit
To software interrupt-handling routine
Figure 4-4. Hardware Interrupt-Handling Sequence
67
Interrupt accepted Interrupt priority decision. Wait for Instruction Internal end of instruction. fetch processing Interrupt request signal Vector table fetch
Stack
Instruction fetch (first instruction of Internal interrupt-handling process- routine) ing
O
Internal address bus
(1)
(3)
(5)
(6)
(8)
(9)
Internal Read signal Internal Write signal
Internal 16-bit data bus
(2)
(4)
(1)
(7)
(9)
(10)
(1)
Instruction prefetch address (Pushed on stack. Instruction is executed on return from interrupt-handling routine.) interrupt-handling routine.) (2) (4) Instruction code (Not executed) (2) (4) Instruction code (Not executed) (3) Instruction prefetch address (Not executed) Instruction prefetch address (Not executed) (3) (5) SP-2 SP-2 (5) (6) SP-4 SP-4 (6) (7) CCRCCR (7) (8) Address of vector table entry entry Address of vector table (8) (9) (9) Vector tabletable entry (address of first instruction interrupt-handling routine) Vector entry (address of first instruction interrupt-handling routine) (10) FirstFirst instruction of interrupt-handling routine instruction of interrupt-handling routine (10)
(1)
Instruction prefetch address (Pushed on stack. Instruction is executed on return from
Figure 4-5. Timing of Interrupt Sequence
68
4.2.1 Interrupt-Related Registers The interrupt controller refers to three registers in addition to the CCR. The names and attributes of these registers are listed in Table 4-3. Table 4-3. Registers Read by Interrupt Controller Name System control register IRQ sense control register IRQ enable register Abbreviation SYSCR ISCR IER Read/write R/W R/W R/W Address H'FFC4 H'FFC6 H'FFC7
(1) System Control Register (SYSCR)--H'FFC4 Bit Initial value Read/Write 7 SSBY 0 R/W 6 STS2 0 R/W 5 STS1 0 R/W 4 STS0 0 R/W 3 -- 1 -- 2 1 NMIEG DPME 0 0 R/W R/W 0 RAME 1 R/W
The first four bits of the system control register concern the software standby mode, and the last two bits enable the on-chip RAM and dual-port RAM. Bit 2 is the only bit read by the interrupt controller. Bit 2--Nonmaskable Interrupt Edge (NMIEG): This bit determines whether a nonmaskable interrupt is generated on the falling or rising edge of the NMI input signal. Bit 2 NMIEG 0 1
Description An interrupt is generated on the falling edge of NMI. An interrupt is generated on the rising edge of NMI.
(Initial state)
(2) IRQ Sense Control Register (ISCR)--H'FFC6 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 IRQ7SC IRQ6SC IRQ5SC IRQ4SC IRQ3SC IRQ2SC IRQ1SC IRQ0SC 0 0 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W R/W R/W
69
Bits 0 to 7 - IRQ0 to IRQ7 Sense Control (IRQ0SC to IRQ7SC): These bits determine whether the IRQ0 to IRQ7 inputs are edge-sensed or level-sensed. Bit i IRQiSC 0 1
Description IRQi is level-sensed. IRQi is sensed on the falling edge.
(Initial state)
Edge-sensed interrupt signals are latched (if enabled) until the interrupt is serviced. They are latched even if the interrupt mask bit (I) is set in the CCR, and remain latched even if the enable bit (IRQ0E to IRQ7E) is later cleared to 0. (3) IRQ Enable Register (IER)--H'FFC7 Bit Initial value Read/Write 7 IRQ7E 0 R/W 6 IRQ6E 0 R/W 5 IRQ5E 0 R/W 4 IRQ4E 0 R/W 3 IRQ3E 0 R/W 2 IRQ2E 0 R/W 1 IRQ1E 0 R/W 0 IRQ0E 0 R/W
Bits 0 to 7 - IRQ0 to IRQ7 Enable (IRQ0E to IRQ7E): These bits enable or disable the IRQi signals individually. After a reset, all IRQi interrupts are disabled (as well as masked). Bit i IRQiE 0 1
Description IRQi is disabled. IRQi is enabled.
(Initial state)
4.2.2 External Interrupts The external interrupts are NMI and IRQ0 to IRQ7. (1) NMI: A nonmaskable interrupt is generated on the rising or falling edge of the NMI input signal regardless of whether the I (interrupt mask) bit is set in the CCR. The valid edge is selected by the NMIEG bit in the system control register. An NMI has highest priority and is always accepted as soon as the current instruction ends, unless the current instruction is an ANDC, ORC, XORC, or LDC instruction. When an NMI interrupt is
70
accepted the interrupt mask (I bit) is set, so the NMI handling routine cannot be interrupted except by another NMI. The NMI vector number is 3. Its entry is located at address H'0006 in the vector table. (2) IRQ0 to IRQ7: These interrupt signals are level-sensed or sensed on the falling edge of the input, as selected by the bits in the ISCR. These interrupts can be masked collectively by the I bit in the CCR, and can be enabled and disabled individually by setting and clearing the bits in the IER. When one of these interrupts is accepted, the I bit is set to "1" to mask further interrupts (except NMI). The interrupt controller reads level-sensed signals directly from the input pin, so the signal must be held Low until the interrupt is accepted. Edge-sensed signals are latched in a flip-flop in the interrupt controller. The signal is latched only if the interrupt is enabled in the IRQ enable register. However, the signal is latched even if the interrupt is masked (I bit set to "1" in the CCR). These interrupts are second in priority to NMI. Among them, IRQ0 has the highest priority and IRQ7 the lowest priority. Interrupts IRQ0 to IRQ7 occur regardless of whether the IRQ0 to IRQ7 lines are used for input or output. When IRQ0 to IRQ7 are requested by external signals, clear the corresponding bits in the port data direction register (DDR) to 0, and do not use the same pins for timer or serial communication interface input or output. 4.2.3 Internal Interrupts Nineteen internal interrupts can be requested by the on-chip supporting modules. All of them are masked when the I bit in the CCR is set. In addition, they can all be enabled or disabled by bits in the control registers of the on-chip supporting modules. When one of these interrupts is accepted, the I bit is set to "1" to mask further interrupts (except NMI). Power can be conserved by waiting for an internal interrupt in the sleep mode, in which the CPU halts but the on-chip supporting modules continue to run. When the interrupt arrives, the CPU returns to the program-execution state, services the interrupt, then resumes execution of the main program. See section 14, "Power-Down State" for further information on the sleep mode. The internal interrupt signals received by the interrupt controller are generated from flag bits in the
71
registers of the on-chip supporting modules. The interrupt controller does not reset these flag bits when accepting the interrupt. The flag bit must be reset by the software interrupt-handling routine. To reset an interrupt flag, software must read the relevant bit or register, then clear the flag bit to "0." The flag bit cannot be cleared unless it is first read. The following is a coding example that clears the A/D interrupt flag (ADF bit) in the A/D control/status register. BCLR #7, @H'FFE8 Note: When disabling internal interrupts, note the following points. 1. Set the interrupt mask (I) to "1" before disabling an internal interrupt (an interrupt from an onchip supporting module) or clearing an interrupt flag. 2. If an instruction that disables an internal interrupt is executed while the interrupt mask (I) is cleared to "0", and the interrupt is requested during execution of the instruction, the CPU resolves this conflict as follows: If one or more other interrupts are also requested, the other interrupt with the highest priority is serviced. If no other interrupt is requested, the CPU branches to the reset address. Example: The following coding disables the output compare A interrupt from the free-running timer module in the H8/330 by clearing the OCIAE bit. The I bit is first set to "1." ORC BCLR ANDC #80, CCR #3, @TIER #7F, CCR ; Set I bit ; Disable output compare A interrupt ; Clear I bit
Note: Interrupt requests are not detected immediately after the ANDC, ORC, XORC, and LDC instructions. For the priority order of these interrupts, see table 4-2. 4.2.4 Interrupt Response Time Table 4-4 indicates the time that elapses from an interrupt request signal until the first instruction of the software interrupt-handling routine is executed. Since the H8/330 accesses its on-chip memory 16 bits at a time, very fast interrupt service can be obtained by placing interrupt-handling routines in on-chip ROM and the stack in on-chip RAM.
72
Table 4-4. Number of States before Interrupt Service Number of states On-chip memory External memory 2 (note 3) 2 (note 3) 1 to 13 5 to 17 (note 2) 4 2 4 4 17 to 29 12 (note 2) 6 (note 2) 12 (note 2) 4 41 to 53 (note 2)
No. Reason for wait 1 Interrupt priority decision 2 Wait for completion of current instruction (note 1) 3 Save PC and CCR 4 Fetch vector 5 Fetch instruction 6 Internal processing Total Notes:
1. These values do not apply if the current instruction is an EEPMOV, MOVFPE, or MOVTPE instruction. 2. If wait states are inserted in external memory access, these values may be longer. 3. 1 for internal interrupts.
4.2.5 Note on Stack Handling When the H8/330 performs word access, the least significant bit of the address is always assumed to be "0." If an odd address is specified, no address error occurs, but the intended address is not accessed. The stack is always accessed by word access. Care should be taken to keep an even value in the stack pointer (general register R7). The PUSH and POP (or MOV.W Rn, @-SP and MOV.W @SP+, Rn) instructions should be used for pushing and popping registers on the stack. The MOV.B Rn, @-SP and MOV.B @SP+, Rn instructions should never be used; they can easily cause programs to crash. Figure 4-6 shows how the PC and CCR are pushed on the stack during the hardware interrupthandling sequence. The CCR is saved as a word consisting of two identical bytes, both containing the CCR value. On return from the interrupt-handling routine, the CCR is popped from the upper of these two bytes. The lower byte is ignored.
73
Figure 4-7 shows an example of damage caused when the stack pointer contains an odd address.
SP-4 SP-3 SP-2 SP-1 SP(R7) Stack area
SP(R7) SP+1 SP+2 SP+3 SP+4
CCR CCR * PC (upper byte) PC (lower byte) Even address
Before interrupt is accepted Pushed onto stack PC : Program counter CCR : Condition code register SP : Stack pointer * : Ignored on return.
After interrupt is accepted
Notes: 1. The PC contains the address of the first instruction executed after return. 2. Registers must be saved and restored by word access at an even address.
Figure 4-6. Usage of Stack in Interrupt Handling
74
PC H SP PC L
SP
R1 L PC L
H'FFCC H'FFCD
SP
H'FFCF
BSR instruction
MOV.B R1L, @-R7
H'FFCF set in SP
PC is improperly stored beyond top of stack
PC H is lost
PCH: PCL : R1L : SP :
Upper byte of program counter Lower byte of program counter General register Stack pointer
Figure 4-7. Example of Damage Caused by Setting an Odd Address in R7 4.2.6 Deferring of Interrupts As noted previously, no interrupt is accepted immediately after a reset. System control instructions that rewrite the CCR have a similar effect. Interrupts requests received during one of these instructions are deferred until at least one more instruction has been executed. The instructions that defer interrupts in this way are XORC, ORC, ANDC, and LDC. At the completion of these instructions the interrupt controller does not check the interrupt signals. The CPU therefore always proceeds to the next instruction. (And if the next instruction is one of these four, the CPU also proceeds to the next instruction after that.) The interrupt-handling sequence starts after the next instruction that is not one of these four has been executed. Figure 4-8 shows an example.
75
NMI and other edge-sensed interrupt request signals that arrive during the execution of an ANDC, ORC, XORC, or LDC instruction are not lost. The request is latched in the interrupt controller and detected after another instruction has been executed.
Program flow LDC.B #H'00 MOV.W #H'FF80,SP Interrupt request: ignored by interrupt controller CPU executes next instruction: interrupt controller now detects interrupt request To interrupt-handling sequence Figure 4-8. Example of Deferred Interrupt
PUSH R1
76
Section 5. I/O Ports
5.1 Overview
The H8/330 has nine parallel I/O ports, including: * Six 8-bit input/output ports--ports 1, 2, 3, 4, 6, and 9 * One 8-bit input port--port 7 * One 7-bit input/output port--port 8 * One 3-bit input/output port--port 5 All ports except port 7 have programmable MOS input pull-ups. Ports 1 and 2 can drive LEDs. Input and output are memory-mapped. The CPU views each port as a data register (DR) located in the register field at the high end of the address space. Each port (except port 7) also has a data direction register (DDR) which determines which pins are used for input and which for output. Output: To send data to an output port, the CPU selects output in the data direction register and writes the desired data in the data register, causing the data to be held in a latch. The latch output drives the pin through a buffer amplifier. If the CPU reads the data register of an output port, it obtains the data held in the latch rather than the actual level of the pin. Input: To read data from an I/O port, the CPU selects input in the data direction register and reads the data register. This causes the input logic level at the pin to be placed directly on the internal data bus. There is no intervening input latch. MOS Pull-Up: The MOS pull-ups for input pins are controlled as follows. To turn on the pull-up transistor for a pin, software must first clear its data direction bit to "0" to make the pin an input pin, then write a "1" in the data bit for that pin. The pull-up can be turned off by writing a "0" in the data bit, or a "1" in the data direction bit. The pull-ups are also turned off by a reset and by entry to the hardware standby mode. The data direction registers are write-only registers; their contents are invisible to the CPU. If the CPU reads a data direction register all bits are read as "1," regardless of their true values. Care is required if bit manipulation instructions are used to set and clear the data direction bits. See the note on bit manipulation instructions in Section 3.5.5, "Bit Manipulations." Auxiliary Functions: In addition to their general-purpose input/output functions, all of the I/O ports have auxiliary functions. Most of the auxiliary functions are software-selectable and must be enabled by setting bits in control registers. When selected, an auxiliary function usually replaces
77
the general-purpose input/output function, but in some cases both functions can operate simultaneously. Table 5-1 summarizes the auxiliary functions of the ports. Table 5-1. Auxiliary Functions of Input/Output Ports I/O port Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8 Expanded modes Address bus (Low)*1 Address bus (High)*1 Data bus*2 8-Bit and PWM timer input and output Serial communication (asynchronous mode) Free-running timer input/output, IRQ6 and IRQ7 Analog input Serial communication (synchronous mode) E clock and IOS output IRQ3 to IRQ5 Bus control and O output*2 IRQ0 to IRQ2 and ADTRG Single-chip mode -- -- Dual-port RAM data bus
Port 9
Serial communication (synchronous mode) Dual-port RAM address select input IRQ3 to IRQ5 Dual-port RAM interface control, O output IRQ0 to IRQ2 and ADTRG
Notes: *1 Selected automatically in mode 1; software-selectable in mode 2 *2 Selected automatically in modes 1 and 2
5.2 Port 1
Port 1 is an 8-bit input/output port that also provides the low bits of the address bus. The function of port 1 depends on the MCU mode as indicated in table 5-2. Table 5-2. Functions of Port 1 Mode 1 Address bus (Low) (A7 to A0) Mode 2 Input port or Address bus (Low) (A7 to A0)* Mode 3 Input/output port
* Depending on the bit settings in the data direction register: 0--input pin; 1--address pin Pins of port 1 can drive a single TTL load and a 90pF capacitive load when they are used as output pins. They can also drive light-emitting diodes and a Darlington pair. When they are used as input pins, they have programmable MOS pull-ups.
78
Table 5-3 details the port 1 registers. Table 5-3. Port 1 Registers Name Abbreviation Read/Write Port 1 data direction register P1DDR W Port 1 data register P1DR R/W Initial value Address H'FF (mode 1) H'FFB0 H'00 (modes 2 and 3) H'00 H'FFB2
Port 1 Data Direction Register (P1DDR)--H'FFB0 Bit Mode 1 Initial value Read/Write Modes 2 and 3 Initial value Read/Write 7 6 5 4 3 2 1 0 P17DDR P16DDR P15DDR P14DDR P13DDR P12DDR P11DDR P10DDR 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W
P1DDR is an 8-bit register that selects the direction of each pin in port 1. A pin functions as an output pin if the corresponding bit in P1DDR is set to "1," and as an input pin if the bit is cleared to "0." Port 1 Data Register (P1DR)--H'FFB2 Bit Initial value Read/Write 7 P17 0 R/W 6 P16 0 R/W 5 P15 0 R/W 4 P14 0 R/W 3 P13 0 R/W 2 P12 0 R/W 1 P11 0 R/W 0 P10 0 R/W
P1DR is an 8-bit register containing the data for pins P17 to P10. When the CPU reads P1DR, for output pins it reads the value in the P1DR latch, but for input pins, it obtains the logic level directly from the pin, bypassing the P1DR latch. MOS Pull-Ups: Are available for input pins in modes 2 and 3. Software can turn on the MOS pull-up by writing a "1" in P1DR, and turn it off by writing a "0." The pull-ups are automatically turned off for output pins in modes 2 and 3, and for all pins in mode 1.
79
Mode 1: In mode 1 (expanded mode without on-chip ROM), port 1 is automatically used for address output. The port 1 data direction register is unwritable. All bits in P1DDR are automatically set to "1" and cannot be cleared to "0." Mode 2: In mode 2 (expanded mode with on-chip ROM), the usage of port 1 can be selected on a pin-by-pin basis. A pin is used for general-purpose input if its data direction bit is cleared to "0," or for address output if its data direction bit is set to "1." Mode 3: In the single-chip mode port 1 is a general-purpose input/output port. Reset: A reset clears P1DDR and P1DR to all "0," placing all pins in the input state with the MOS pull-ups off. In mode 1, when the chip comes out of reset, P1DDR is set to all "1." Hardware Standby Mode: All pins are placed in the high-impedance state with the MOS pull-ups off. Software Standby Mode: In the software standby mode, both P1DDR and P1DR remain in their previous state. Address output pins are Low. General-purpose output pins continue to output the data in P1DR. Figure 5-1 shows a schematic diagram of port 1.
80
Hardware standby
Mode 1 Reset
*
*
S* R D Q P1n DDR C * WP1D Internal address bus Internal data bus
Mode 3
Reset
P1 n
*
Mode 1 or 2
*
R D Q P1n DR C WP1
* * *
RP1
WP1D: Write Port 1 DDR WP1: Write Port 1 RP1: Read Port 1 n =0 to7 * Set-priority
Figure 5-1. Port 1 Schematic Diagram
5.3 Port 2
Port 2 is an 8-bit input/output port that also provides the high bits of the address bus. The function of port 2 depends on the MCU mode as indicated in Table 5-4. Table 5-4. Functions of Port 2 Mode 2 Mode 3 Input port or Input/output port Address bus (High) (A15 to A8)* * Depending on the bit settings in the data direction register: 0--input pin; 1--address pin Mode 1 Address bus (High) (A15 to A8)
81
Pins of port 2 can drive a single TTL load and a 90pF capacitive load when they are used as output pins. They can also drive light-emitting diodes and a Darlington pair. When they are used as input pins, they have programmable MOS pull-ups. Table 5-5 details the port 2 registers. Table 5-5. Port 2 Registers Name Port 2 data direction register Port 2 data register Abbreviation P2DDR P2DR Read/Write W R/W Initial value H'FF (mode 1) H'00 (modes 2 and 3) H'00 Address H'FFB1 H'FFB3
Port 2 Data Direction Register (P2DDR)--H'FFB1 Bit Mode 1 Initial value Read/Write Modes 2 and 3 Initial value Read/Write 7 6 5 4 3 2 1 0 P27DDR P26DDR P25DDR P24DDR P23DDR P22DDR P21DDR P20DDR 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W 1 -- 0 W
P2DDR is an 8-bit register that selects the direction of each pin in port 2. A pin functions as an output pin if the corresponding bit in P2DDR is set to "1," and as an input pin if the bit is cleared to "0." Port 2 Data Register (P2DR)--H'FFB3 Bit Initial value Read/Write 7 P27 0 R/W 6 P26 0 R/W 5 P25 0 R/W 4 P24 0 R/W 3 P23 0 R/W 2 P22 0 R/W 1 P21 0 R/W 0 P20 0 R/W
P2DR is an 8-bit register containing the data for pins P27 to P20. When the CPU reads P2DR, for output pins it reads the value in the P2DR latch, but for input pins, it obtains the logic level directly from the pin, bypassing the P2DR latch.
82
MOS Pull-Ups: Are available for input pins in modes 2 and 3. Software can turn on the MOS pull-up by writing a "1" in P2DR, and turn it off by writing a "0." The pull-ups are automatically turned off for output pins in modes 2 and 3, and for all pins in mode 1. Mode 1: In mode 1 (expanded mode without on-chip ROM), port 2 is automatically used for address output. The port 2 data direction register is unwritable. All bits in P2DDR are automatically set to "1" and cannot be cleared to "0." Mode 2: In mode 2 (expanded mode with on-chip ROM), the usage of port 2 can be selected on a pin-by-pin basis. A pin is used for general-purpose input if its data direction bit is cleared to "0," or for address output if its data direction bit is set to "1." Mode 3: In the single-chip mode port 2 is a general-purpose input/output port. Reset: A reset clears P2DDR and P2DR to all "0," placing all pins in the input state with the MOS pull-ups off. In mode 1, when the chip comes out of reset, P2DDR is set to all "1." Hardware Standby Mode: All pins are placed in the high-impedance state with the MOS pull-ups off. Software Standby Mode: In the software standby mode, both P2DDR and P2DR remain in their previous state. Address output pins are Low. General-purpose output pins continue to output the data in P2DR. Figure 5-2 shows a schematic diagram of port 2.
83
Hardware standby
Mode 1 Reset S* R Q D P2n DDR C * WP2D Internal address bus Internal data bus
Mode 3
Reset R Q D P2n DR C
P2 n Mode 1, or 2 1 or 2
WP2
RP2
WP2D: Write Port 2 DDR WP2: Write Port 2 RP2: Read Port 2 n = 0 to7 * Set-priority
Figure 5-2. Port 2 Schematic Diagram
5.4 Port 3
Port 3 is an 8-bit input/output port that also provides the external data bus and dual-port RAM (master-slave) data bus. The function of port 3 depends on the MCU mode as indicated in table 5-6. Table 5-6. Functions of Port 3 Mode 3 DPME = "0" DPME = "1" Input/output port Dual-port RAM data bus
Mode 1 Data bus
Mode 2 Data bus
Pins of port 3 can drive a single TTL load and a 90pF capacitive load when they are used as output
84
pins. They can also drive a Darlington pair. When they are used as input pins, they have programmable MOS pull-ups. Table 5-7 details the port 3 registers. Table 5-7. Port 3 Registers Name Abbreviation Port 3 data direction register P3DDR Port 3 data register P3DR Read/Write Initial value W H'00 R/W H'00 Address H'FFB4 H'FFB6
Port 3 Data Direction Register (P3DDR)--H'FFB4 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 P37DDR P36DDR P35DDR P34DDR P33DDR P32DDR P31DDR P30DDR 0 0 0 0 0 0 0 0 W W W W W W W W
P3DDR is an 8-bit register that selects the direction of each pin in port 3. A pin functions as an output pin if the corresponding bit in P3DDR is set to "1," and as an input pin if the bit is cleared to "0." Port 3 Data Register (P3DR)--H'FFB6 Bit Initial value Read/Write 7 P37 0 R/W 6 P36 0 R/W 5 P35 0 R/W 4 P34 0 R/W 3 P33 0 R/W 2 P32 0 R/W 1 P31 0 R/W 0 P30 0 R/W
P3DR is an 8-bit register containing the data for pins P37 to P30. When the CPU reads P3DR, for output pins it reads the value in the P3DR latch, but for input pins, it obtains the logic level directly from the pin, bypassing the P3DR latch. MOS Pull-Ups: Are available for input pins in mode 3 when the dual-port RAM is disabled. Software can turn on the MOS pull-up on by writing a "1" in P3DR, and turn it off by writing a "0."
85
The MOS pull-ups cannot be used in slave mode (when the dual-port RAM is enabled). P3DR should be cleared to H'00 (its initial value) in slave mode. Modes 1 and 2: In the expanded modes, port 3 is automatically used as the data bus. The values in P3DDR and P3DR are ignored. Mode 3: In the single-chip mode, when the dual-port RAM enable (DPME) bit in the system control register is cleared to "0," port 3 can be used as a general-purpose input/output port. When DPME is set to "1," entering the slave mode, port 3 is used as the dual-port RAM data bus (DDB7 to DDB0). P3DR should also be cleared to H'00 in slave mode. See section 12, "Dual-Port RAM" for further information. Reset and Hardware Standby Mode: A reset or entry to the hardware standby mode clears P3DDR and P3DR to all "0," and clears the DPME bit to "0." In modes 1 and 2, all pins are placed in the data input (high-impedance) state. In mode 3 (single-chip mode), all pins are in the input state with the MOS pull-ups off. Software Standby Mode: In the software standby mode, P3DDR, P3DR, and the DPME bit remain in their previous state. In modes 1 and 2 and slave mode, all pins are placed in the data input (high-impedance) state. In mode 3 with the dual-port RAM disabled, all pins remain in their previous input or output state. Figure 5-3 shows a schematic diagram of port 3.
86
DPME Mode 3 Mode 3
CS OE
Reset R D Q P3nDDR C WP3D Dual-port RAM data bus Internal data bus Reset
External address write
P3 n
Mode 1 or 2
CS WE WE
R D Q P3nDR C WP3
RP3 External address read WP3D: Write Port 3 DDR WP3D: Write Port 33 WP3: Write Port DDR WP3: Write Port 3 3 RP3: Read Port RP3: Read Port 3 n = 0 to 3 n = 0 to 7
Figure 5-3. Port 3 Schematic Diagram
Figure 5-3
87
5.5 Port 4
Port 4 is an 8-bit input/output port that also provides the input and output pins for the 8-bit timers and the output pins for the PWM timers. The pin functions depend on control bits in the control registers of the timers. Pins not used by the timers are available for general-purpose input/output. Table 5-8 lists the pin functions, which are the same in both the expanded and single-chip modes. Table 5-8. Port 4 Pin Functions (Modes 1 to 3) Usage I/O port Timer Pin functions P40 P41 TMCI0 TMO0
P42 TMRI0
P43 TMCI1
P44 TMO1
P45 P46 TMRI1 PW0
P47 PW1
See section 7, "8-Bit Timer Module" and section 8, "PWM Timer Module" for details of the timer control bits. Pins of port 4 can drive a single TTL load and a 90pF capacitive load when they are used as output pins. They can also drive a Darlington pair. When used as input pins, they have programmable MOS pull-ups. Table 5-9 details the port 4 registers. Table 5-9. Port 4 Registers Name Port 4 data direction register Port 4 data register Abbreviation P4DDR P4DR Read/Write W R/W Initial value H'00 H'00 Address H'FFB5 H'FFB7
Port 4 Data Direction Register (P4DDR)--H'FFB5 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 P47DDR P46DDR P45DDR P44DDR P43DDR P42DDR P41DDR P40DDR 0 0 0 0 0 0 0 0 W W W W W W W W
P4DDR is an 8-bit register that selects the direction of each pin in port 4. A pin functions as an output pin if the corresponding bit in P4DDR is set to "1," and as an input pin if the bit is cleared to "0."
88
Port 4 Data Register (P4DR)--H'FFB7 Bit Initial value Read/Write 7 P47 0 R/W 6 P46 0 R/W 5 P45 0 R/W 4 P44 0 R/W 3 P43 0 R/W 2 P42 0 R/W 1 P41 0 R/W 0 P40 0 R/W
P4DR is an 8-bit register containing the data for pins P47 to P40. When the CPU reads P4DR, for output pins (P4DDR = "1") it reads the value in the P4DR latch, but for input pins (P4DDR = "0"), it obtains the logic level directly from the pin, bypassing the P4DR latch. This also applies to pins used for timer input or output. MOS Pull-Ups: Are available for input pins, including timer input pins, in all modes. Software can turn the MOS pull-up on by writing a "1" in P4DR, and turn it off by writing a "0." Pins P40, P42, P43, and P45: As indicated in Table 5-8, these pins can be used for general-purpose input or output, or input of 8-bit timer clock and reset signals. When a pin is used for timer signal input, its P4DDR bit should normally be cleared to "0;" otherwise the timer will receive the value in P4DR. If input pull-up is not desired, the P4DR bit should also be cleared to "0." Pins P41, P44, P46, and P47: As indicated in Table 5-8, these pins can be used for general-purpose input or output, or for 8-bit timer output (P41 and P44) or PWM timer output (P46 and P47). Pins used for timer output are unaffected by the values in P4DDR and P4DR, and their MOS pull-ups are automatically turned off. Reset and Hardware Standby Mode: A reset or entry to the hardware standby mode clears P4DDR and P4DR to all "0" and makes all pins into input port pins with the MOS pull-ups off. Software Standby Mode: In the software standby mode, the control registers of the 8-bit and PWM timers are initialized but P4DDR and P4DR remain in their previous states. All pins become input or output port pins depending on the setting of P4DDR. Output pins output the values in P4DR. The MOS pull-ups of input pins are on or off depending on the values in P4DR. Figures 5-4 and 5-5 show schematic diagrams of port 4.
89
Reset R Q D P4n DDR C WP4D Reset P4 n R Q D P4n DR C WP4 Internal data bus 8-bit timer module Counter clock input Counter reset input
RP4
WP4D: Write Port 4 DDR WP4: Write Port 4 RP4: Read Port 4 n = 0, 2, 3, 5
Figure 5-4. Port 4 Schematic Diagram (Pins P40, P42, P43, and P45)
90
Reset R Q D P4n DDR C WP4D Reset P4 n R D Q P4n DR C WP4 Output enable 8-Bit timer output or PWM timer output Internal data bus
8-Bit timer module, PWM timer module
RP4
WP4D: Write Port 4 DDR WP4: Write Port 4 RP4: Read Port 4 n = 1, 4, 6, 7
Figure 5-5. Port 4 Schematic Diagram (Pins P41, P44, P46, and P47)
5.6 Port 5
Port 5 is a 3-bit input/output port that also provides the input and output pins for asynchronous serial communication. The pin functions depend on control bits in the serial control register (SCR). Pins not used for serial communication are available for general-purpose input/output. Table 5-10 lists the pin functions, which are the same in both the expanded and single-chip modes. Table 5-10. Port 5 Pin Functions (Modes 1 to 3) Usage I/O port Timer Pin functions P50 P51 ATxD ARxD
P52 ASCK
91
See section 9, "Serial Communication Interface" for details of the serial control bits. Pins used by the serial communication interface are switched between input and output without regard to the values in the data direction register. Pins of port 5 can drive a single TTL load and a 30pF capacitive load when they are used as output pins. They can also drive a Darlington pair. When used as input pins, they have programmable MOS pull-ups. Table 5-11 details the port 5 registers. Table 5-11. Port 5 Registers Name Port 5 data direction register Port 5 data register Abbreviation P5DDR P5DR Read/Write W R/W Initial value H'F8 H'F8 Address H'FFB8 H'FFBA
Port 5 Data Direction Register (P5DDR)--H'FFB8 Bit Initial value Read/Write 7 -- 1 -- 6 -- 1 -- 5 -- 1 -- 4 -- 1 -- 3 -- 1 -- 2 1 0 P52DDR P51DDR P50DDR 0 0 0 W W W
P5DDR is an 8-bit register that selects the direction of each pin in port 5. A pin functions as an output pin if the corresponding bit in P5DDR is set to "1," and as an input pin if the bit is cleared to "0." Port 5 Data Register (P5DR)--H'FFBA Bit Initial value Read/Write 7 -- 1 -- 6 -- 1 -- 5 -- 1 -- 4 -- 1 -- 3 -- 1 -- 2 P52 0 R/W 1 P51 0 R/W 0 P50 0 R/W
P5DR is an 8-bit register containing the data for pins P52 to P50. When the CPU reads P5DR, for output pins (P5DDR = "1") it reads the value in the P5DR latch, but for input pins (P5DDR = "0"), it obtains the logic level directly from the pin, bypassing the P5DR latch. This also applies to pins
92
used for serial communication. MOS Pull-Ups: Are available for input pins, including serial communication input pins. Software can turn the MOS pull-up on by writing a "1" in P5DR, and turn it off by writing a "0." Pin P50: This pin can be used for general-purpose input or output, or for output of asynchronous serial transmit data (ATxD). When used for ATxD output, this pin is unaffected by the values in P5DDR and P5DR, and its MOS pull-up is automatically turned off. Pin P51: This pin can be used for general-purpose input or output, or for input of asynchronous serial receive data (ARxD). When used for ARxD input, this pin is unaffected by P5DDR and P5DR, except that software can turn on its MOS pull-up by clearing its data direction bit to "0" and setting its data bit to "1." Pin P52: This pin can be used for general-purpose input or output, or for asynchronous serial clock input or output (ASCK). When used for ASCK input or output, this pin is unaffected by P5DDR and P5DR, except that software can turn on its MOS pull-up by clearing its data direction bit to "0" and setting its data bit to "1." For ASCK usage, the MOS pull-up should be turned off. Reset and Hardware Standby Mode: A reset or entry to the hardware standby mode makes all pins of port 5 into input port pins with the MOS pull-ups off. Software Standby Mode: In the software standby mode, the serial control register is initialized but P5DDR and P5DR remain in their previous states. All pins become input or output port pins depending on the setting of P5DDR. Output pins output the values in P5DR. The MOS pull-ups of input pins are on or off depending on the values in P5DR. Figures 5-6 to 5-8 show schematic diagrams of port 5.
93
Reset R D Q P50 DDR C Internal data bus SCI module Asynchronous serial transmit enable Asynchronous serial transmit data WP5D Reset P5 0 R D Q P50 DR C WP5
RP5
WP5D: Write Port 5 DDR WP5: Write Port 5 RP5: Read Port 5
Figure 5-6. Port 5 Schematic Diagram (Pin P50)
94
Reset R Q D P51 DDR C WP5D Internal data bus Reset P5 1 R Q D P51 DR C WP5
SCI module Asynchronous serial receive enable
RP5
WP5D: Write Port 5 DDR WP5 Write Port 5 RP5: Read Port 5
Asynchronous serial receive data
Figure 5-7. Port 5 Schematic Diagram (Pin P51)
95
Reset R D Q P52 DDR WP5D Reset P5 2 R D Q P52 DR C WP5 Internal data bus Asynchronous serial clock input enable
SCI module
Asynchronous serial clock output enable Asynchronous serial clock output
RP5 Asynchronous serial clock input WP5D: Write Port 5 DDR WP5 Write Port 5 RP5: Read Port 5
Figure 5-8. Port 5 Schematic Diagram (Pin P52)
5.7 Port 6
Port 6 is an 8-bit input/output port that also provides the input and output pins for the free-running timer and the IRQ6 and IRQ7 input/output pins. The pin functions depend on control bits in the free-running timer control registers, and on bit 6 or 7 of the interrupt enable register. Pins not used for timer or interrupt functions are available for general-purpose input/output. Table 5-12 lists the pin functions, which are the same in both the expanded and single-chip modes. Table 5-12. Port 6 Pin Functions Usage Pin functions (Modes 1 to 3) I/O port P60 P61 P62 Timer/interrupt FTCI FTOA FTIA
P63 FTIB
P64 FTIC
P65 FTID
P66 FTOB/IRQ6
P67 IRQ7
96
See section 4 "Exception Handling" and section 6, "Free-Running Timer Module" for details of the free-running timer and interrupts. Pins of port 6 can drive a single TTL load and a 90pF capacitive load when they are used as output pins. They can also drive a Darlington pair. When they are used as input pins, they have programmable MOS pull-ups. Table 5-13 details the port 6 registers. Table 5-13. Port 6 Registers Name Abbreviation Port 6 data direction register P6DDR Port 6 data register P6DR Read/Write Initial value W H'00 R/W H'00 Address H'FFB9 H'FFBB
Port 6 Data Direction Register (P6DDR)--H'FFB9 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 P67DDR P66DDR P65DDR P64DDR P63DDR P62DDR P61DDR P60DDR 0 0 0 0 0 0 0 0 W W W W W W W W
P6DDR is an 8-bit register that selects the direction of each pin in port 6. A pin functions as an output pin if the corresponding bit in P6DDR is set to "1," and as an input pin if the bit is cleared to "0." Port 6 Data Register (P6DR)--H'FFBB Bit Initial value Read/Write 7 P67 0 R/W 6 P66 0 R/W 5 P65 0 R/W 4 P64 0 R/W 3 P63 0 R/W 2 P62 0 R/W 1 P61 0 R/W 0 P60 0 R/W
P6DR is an 8-bit register containing the data for pins P67 to P60. When the CPU reads P6DR, for output pins (P6DDR = "1") it reads the value in the P6DR latch, but for input pins (P6DDR = "0"), it obtains the logic level directly from the pin, bypassing the P6DR latch. This also applies to pins used for input and output of timer and interrupt signals.
97
MOS Pull-Ups: Are available for input pins, including pins used for input of timer or interrupt signals. Software can turn the MOS pull-up on by writing a "1" in P6DR, and turn it off by writing a "0." Pins P60, P62, P63, P64 and P65: As indicated in Table 5-12, these pins can be used for generalpurpose input or output, or for input of free-running timer clock and input capture signals. When a pin is used for free-running timer input, its P6DDR bit should be cleared to "0;" otherwise the freerunning timer will receive the value in P6DR. If input pull-up is not desired, the P6DR bit should also be cleared to "0." Pin P61: This pin can be used for general-purpose input or output, or for the output compare A signal (FTOA) of the free-running timer. When used for FTOA output, this pin is unaffected by the values in P6DDR and P6DR, and its MOS pull-up is automatically turned off. Pin P66: This pin can be used for general-purpose input or output, for the output compare B signal (FTOB) of the free-running timer, or for IRQ6 input. When used for FTOB output, this pin is unaffected by the values in P6DDR and P6DR, and its MOS pull-up is automatically turned off. When this pin is used for IRQ6 input, P66DDR should normally be cleared to "0," so that the value in P6DR will not generate interrupts. Pin P67: This pin can be used for general-purpose input or output, or IRQ7 input. When it is used for IRQ7 input, P67DDR should normally be cleared to "0," so that the value in P6DR will not generate interrupts. Reset and Hardware Standby Mode: A reset or entry to the hardware standby mode clears P6DDR and P6DR to all "0" and makes all pins into input port pins with the MOS pull-ups off. Software Standby Mode: In the software standby mode, the free-running timer control registers are initialized but P6DDR and P6DR remain in their previous states. All pins become input or output port pins depending on the setting of P6DDR. Output pins output the values in P6DR. The MOS pull-ups of input pins are on or off depending on the values in P6DR. Figures 5-9 to 5-11 shows schematic diagrams of port 6.
98
Reset R D Q P6n DDR C Internal data bus Free-running timer module Input capture input, counter clock input WP6D Reset P6 n R D Q P6n DR C WP6
RP6
WP6D: Write Port 6 DDR WP6: Write Port 6 RP6: Read Port 6 n = 0. 2 - 5
Figure 5-9. Port 6 Schematic Diagram (Pins P60, P62, P63, P64, and P65)
Figure 5-9
99
Reset R Q D P61 DDR C WP6D Reset P6 1 R D Q P61 DR C WP6 Output enable Output-compare output Internal data bus
Free-running timer module
RP6
WP6D: Write Port 6 DDR WP6: Write Port 6 RP6: Read Port 6
Figure 5-10. Port 6 Schematic Diagram (Pin P61)
100
Reset R D Q P66 DDR C WP6D Reset P6 6 R D Q P66 DR C WP6 Output enable Output-compare output Internal data bus
Free-running timer module
RP6
IRQ6 input IRQ enable register IRQ6 enable
WP6D: Write Port 6 DDR WP6: Write Port 6 RP6: Read Port 6
Figure 5-11. Port 6 Schematic Diagram (Pin P66)
101
Reset R Q D P67 DDR C WP6D Reset P6 7 R Q D P67 DR C WP6 Internal data bus IRQ7 input IRQ enable register IRQ7 enable
RP6
WP6D: Write Port 6 DDR WP6: Write Port 6 RP6: Read Port 6
Figure 5-12. Port 6 Schematic Diagram (Pin P67)
5.8 Port 7
Port 7 is an 8-bit input port that also provides the analog input pins for the A/D converter module. The pin functions are the same in both the expanded and single-chip modes. Table 5-14 lists the pin functions. Table 5-15 describes the port 7 data register, which simply consists of connections of the port 7 pins to the internal data bus. Figure 5-13 shows a schematic diagram of port 7.
102
Table 5-14. Port 7 Pin Functions (Modes 1 to 3) Usage I/O port Analog input Pin functions P70 P71 AN0 AN1
P72 AN2
P73 AN3
P74 AN4
P75 AN5
P76 AN6
P77 AN7
Table 5-15. Port 7 Register Name Port 7 data register Abbreviation P7DR Read/Write R Initial value Undetermined Address H'FFBE
Port 7 Data Register (P7DR)--H'FFBE Bit Initial value Read/Write 7 P77 * R 6 P76 * R 5 P75 * R 4 P74 * R 3 P73 * R 2 P72 * R 1 P71 * R 0 P70 * R
* Depends on the levels of pins P77 to P70.
RP7 P7 n
Internal data bus
A/D converter module
Analog input RP7: Read port 7 n = 0 to 7
Figure 5-13. Port 7 Schematic Diagram
Figure 5-13
103
5.9 Port 8
Port 8 is a 7-bit input/output port that also provides pins for E clock output, dual-port RAM register select input, interrupt input, and clock-synchronized serial communication. Table 5-16 lists the pin functions. Table 5-16. Port 8 Pin Functions Auxiliary functions Expanded modes E clock output IOS output -- -- CTxD output /IRQ3 input CRxD input /IRQ4 input CSCK input/output /IRQ5 input
I/O port P80 input/output P81 input/output P82 input/output P83 input/output P84 input/output P85 input/output P86 input/output
Single-chip mode RS0 input RS1 input RS2 input RS3 input
Pins of port 8 can drive a single TTL load and a 30pF capacitive load when they are used as output pins. They can also drive a Darlington pair. When used as input pins, they have programmable MOS pull-ups. Table 5-17 details the port 8 registers. Table 5-17. Port 8 Registers Name Abbreviation Read/Write Initial value Port 8 data direction register P8DDR W H'81 (modes 1 and 2) H'80 (mode 3) Port 8 data register P8DR R/W H'80 Address H'FFBD H'FFBF
104
Port 8 Data Direction Register (P8DDR)--H'FFBD Bit Modes 1 and 2 Initial value Read/Write Mode 3 Initial value Read/Write 7 -- 1 -- 1 -- 6 5 4 3 2 1 0 P86DDR P85DDR P84DDR P83DDR P82DDR P81DDR P80DDR 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 1 W 0 W
P8DDR is an 8-bit register that selects the direction of each pin in port 8. A pin functions as an output pin if the corresponding bit in P8DDR is set to "1," and as in input pin if the bit is cleared to "0." Bit 7 is reserved. It cannot be modified, and is always read as "1." Port 8 Data Register (P8DR)--H'FFBF Bit Initial value Read/Write 7 -- 1 -- 6 P86 0 R/W 5 P85 0 R/W 4 P84 0 R/W 3 P83 0 R/W 2 P82 0 R/W 1 P81 0 R/W 0 P80 0 R/W
P8DR is an 8-bit register containing the data for pins P86 to P80. When the CPU reads P8DR, for output pins (P8DDR = "1") it reads the value in the P8DR latch, but for input pins (P8DDR = "0"), it obtains the logic level directly from the pin, bypassing the P8DR latch. This also applies to pins used for dual-port RAM register select input, interrupt input, serial communication, and E clock or IOS output. Bit 7 is reserved. It cannot be modified, and is always read as "1." MOS Pull-Ups: Are available for input pins in all modes, including pins used for dual-port RAM register select input, interrupt input, or serial communication input. Software can turn the MOS pull-up on by writing a "1" in P8DR, and turn it off by writing a "0."
105
Pin P80: In modes 1 and 2 (expanded modes), pin P80 is used for E clock output if P80DDR is set to "1," and for general-purpose input if P80DDR is cleared "0." It cannot be used for generalpurpose output. In mode 3 (single-chip mode), when the dual-port RAM is disabled (DPME = "0"), pin P80 can be used for general-purpose input or output. In the slave mode (DPME = "1"), this pin is used for register select input (RS0). In slave mode this pin is unaffected by the values in P8DDR and P8DR, except that software can turn on its MOS pull-up by clearing its data direction bit to "0" and setting its data bit to "1." Pin P81: In modes 1 and 2 (expanded modes), pin P81 is used for IOS output if P81DDR is set to "1," and for general-purpose input if P81DDR is cleared "0." It cannot be used for general-purpose output. In mode 3, when the dual-port RAM is disabled (DPME = "0"), pin P81 can be used for generalpurpose input or output. In the slave mode (DPME = "1"), this pin is used for register select input (RS1). In slave mode this pin is unaffected by the values in P8DDR and P8DR, except that software can turn on its MOS pull-up by clearing its data direction bit to "0" and setting its data bit to "1." Pins P82 and P83: These pins are available for general-purpose input or output in modes 1 and 2, and in mode 3 if the dual-port RAM is disabled (DPME = "0"). In the slave mode (mode 3 with DPME = "1"), these pins are used for register select input (RS2 and RS3). They are unaffected by the bits in P8DDR and P8DR, except that software can turn on their MOS pull-ups by clearing the P8DDR bit to "0" and setting the P8DR bit to "1." Pin P84: This pin has the same functions in all modes. It can be used for general-purpose input or output, for output of clock-synchronized serial transmit data (CTxD), or for IRQ3 input. When used for CTxD output, this pin is unaffected by the values in P8DDR and P8DR, and its MOS pullup is automatically turned off. When this pin is used for IRQ3 input, P84DDR should normally be cleared to "0," so that the value in P8DR will not generate interrupts. Pin P85: This pin has the same functions in all modes. It can be used for general-purpose input or output, for input of clock-synchronized serial receive data (CRxD), or for IRQ4 input. When used for CRxD input, this pin is unaffected by the values in P8DDR and P8DR, except that software can turn on its MOS pull-up by clearing its data direction bit to "0" and setting its data bit to "1." When this pin is used for IRQ4 input, P85DDR should normally be cleared to "0," so that the value in P8DR will not generate interrupts.
106
Pin P86: This pin has the same functions in all modes. It can be used for general-purpose input or output, for serial clock input or output (CSCK), or for IRQ5 input. When this pin is used for IRQ5 input, P86DDR should normally be cleared to "0," so that the value in P8DR will not generate interrupts. When used for CSCK input or output, this pin is unaffected by the values in P8DDR and P8DR, except that software can turn on its MOS pull-up by clearing its data direction bit to "0" and setting its data bit to "1." For CSCK usage, the MOS pull-up should be turned off. Reset: A reset clears bits P86DDR to P81DDR to "0" and clears the DPME bit, serial control bits, and interrupt enable bits to "0," making P86 to P81 into input port pins with the MOS pull-ups off. In the expanded modes (modes 1 and 2), P80DDR is initialized to "1" and the P80 pin is used for E clock output. In the single-chip mode (mode 3), P80DDR is initialized to "0" and the P80 pin is used for port input. Hardware Standby Mode: All pins are placed in the high-impedance state with the MOS pull-ups off. Software Standby Mode: In the software standby mode, the serial control register is initialized, but the DPME bit, the interrupt enable register, P8DDR, and P8DR remain in their previous states. Pins that were being used for serial communication revert to general-purpose input or output, depending on the value in P8DDR. Other pins remain in their previous state. Output pins output the values in P8DR. E clock output is Low. Figures 5-14 to 5-19 show schematic diagrams of port 8.
107
DPME Mode 3
Mode Mode 3 1 or 2 Reset
Hardware standby S R D Q P8 0 DDR C Mode 3 WP8D Reset R D Q P8 0 DR C Mode 1 or 2 WP8 Internal data bus
P8 0
E
RP8
Dual-port RAM module Register select input WP8D: Write Port 8 DDR WP8: Write Port 8 RP8: Read Port 8
Figure 5-14. Port 8 Schematic Diagram (Pin P80)
108
DPME Mode 3
Reset R D Q P81 DDR C WP8D Mode 3 Reset R D Q P81 DR C Mode 1 or 2 WP8 IOS output Internal data bus Dual-port RAM module Register select input WP8D: Write Port 8 DDR WP8: Write Port 8 RP8: Read Port 8
P8 1
RP8
Figure 5-15. Port 8 Schematic Diagram (Pin P81)
109
DPME Mode 3
Reset R D Q P8n DDR C WP8D Reset P8 n R D Q P8n DR C WP8 Internal data bus Dual-port RAM module Register select input WP8D: Write Port 8 DDR WP8: Write Port 8 RP8: Read Port 8 n = 2, 3
RP8
Figure 5-16. Port 8 Schematic Diagram (Pins P82 and P83)
110
Reset R D Q P84 DDR C WP8D Reset P8 4 R D Q P84 DR C WP8 Internal data bus
SCI module Synchronous serial transmit enable Synchronous serial transmit data
RP8
IRQ3 input IRQ enable register IRQ3 enable
WP8D: Write Port 8 DDR WP8: Write Port 8 RP8: Read Port 8
Figure 5-17. Port 8 Schematic Diagram (Pin P84)
111
Reset R Q D P85 DDR C WP8D Reset P8 5 R D Q P85 DR C WP8 Internal data bus SCI module Synchronous serial input enable
RP8
Synchronous receive data IRQ4 input IRQ enable register IRQ4 enable
WP8D: Write Port 8 DDR WP8: Write Port 8 RP8: Read Port 8
Figure 5-18. Port 8 Schematic Diagram (Pin P85)
112
Reset R Q D P86 DDR C WP8D Internal data bus Reset P8 6 Q RD
SCI module Synchronous serial clock input enable
P86 DR C WP8
Synchronous serial clock output enable Synchronous serial clock output
RP8 Synchronous serial clock input
IRQ5 input WP8D: Write Port 8 DDR WP8: Write Port 8 RP8: Read Port 8 IRQ enable register IRQ5 enable
Figure 5-19. Port 8 Schematic Diagram (Pin P86)
113
5.10 Port 9
Port 9 is an 8-bit input/output port that also provides pins for interrupt input (IRQ0 to IRQ2), A/D trigger input, system clock (O) output, bus control signals (in the expanded modes), and dual-port RAM interface control signals (in the single-chip mode). Pins P97 to P93 have different functions in different modes. Pins P92 to P90 have the same functions in all modes. Table 5-18 lists the pin functions. Table 5-18. Port 9 Pin Functions Single-chip mode Expanded modes DPME = 0 DPME = 1 P90 input/output , IRQ2 input, and ADTRG input (simultaneously) P91 input/output and IRQ1 input (simultaneously) P92 input/output and IRQ0 input (simultaneously) RD output P93 input/output CS input WR output P94 input/output OE input AS output P95 input/output RDY output O output P96 input or O output P96 input or O output WAIT input P97 input/output WE input
Pin P90 P91 P92 P93 P94 P95 P96 P97
Pins of port 9 can drive a single TTL load and a 90pF capacitive load when they are used as output pins. When used as input pins, they have programmable MOS pull-ups. Table 5-19 details the port 9 registers. Table 5-19. Port 9 Registers Name Abbreviation Port 9 data direction register P9DDR Port 9 data register P9DR Read/Write W R/W Initial value Address H'40 (modes 1 and 2) H'FFC0 H'00 (mode 3 H'00 H'FFC1
114
Port 9 Data Direction Register (P9DDR)--H'FFC0 Bit Modes 1 and 2 Initial value Read/Write Mode 3 Initial value Read/Write 7 6 5 4 3 2 1 0 P97DDR P96DDR P95DDR P94DDR P93DDR P92DDR P91DDR P90DDR 0 W 0 W 1 -- 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W
P9DDR is an 8-bit register that selects the direction of each pin in port 9. A pin functions as an output pin if the corresponding bit in P9DDR is set to "1," and as in input pin if the bit is cleared to "0." Port 9 Data Register (P9DR)--H'FFC1 Bit Initial value Read/Write 7 P97 0 R/W 6 P96 0 R/W 5 P95 0 R/W 4 P94 0 R/W 3 P93 0 R/W 2 P92 0 R/W 1 P91 0 R/W 0 P90 0 R/W
P9DR is an 8-bit register containing the data for pins P97 to P90. When the CPU reads P9DR, for output pins (P9DDR = "1") it reads the value in the P9DR latch, but for input pins (P9DDR = "0"), it obtains the logic level directly from the pin, bypassing the P9DR latch. This also applies to pins used for interrupt input, A/D trigger input, clock output, and control signal input or output. MOS Pull-Ups: Are available for input pins, including pins used for input of interrupt request signals, the A/D trigger signal, and control signals. Software can turn the MOS pull-up on by writing a "1" in P9DR, and turn it off by writing a "0." Pins P90, P91, and P92: Can be used for general-purpose input or output, interrupt request input, or A/D trigger input. See Table 5-18. If a pin is used for interrupt or A/D trigger input, its data direction bit should be cleared to "0," so that the output from P9DR will not generate an interrupt request or A/D trigger signal. Pins P93 and P94: In modes 1 and 2 (the expanded modes), these pins are used for output of the RD and WR bus control signals. They are unaffected by the values in P9DDR and P9DR, and their
115
MOS pull-ups are automatically turned off. In mode 3 (single-chip mode) with the dual-port RAM disabled (DPME = "0"), these pins can be used for general-purpose input or output. In slave mode (mode 3 with DPME = "1"), these pins are used for input of the CS and OE dual-port RAM interface control signals. They are unaffected by the values in P9DDR and P9DR, except that software can turn on their MOS pull-ups by clearing their data direction bits to "0" and setting their data bits to "1." Pin P95: In modes 1 and 2 and slave mode, this pin is used for output of the AS bus control signal or RDY dual-port RAM interface control signal. It is unaffected by the values in P9DDR and P9DR, and its MOS pull-up is automatically turned off. In mode 3 with the dual-port RAM disabled (DPME = "0"), this pin can be used for generalpurpose input or output. Pin P96: In modes 1 and 2, this pin is used for system clock (O) output. Its MOS pull-up is automatically turned off. In mode 3, this pin is used for general-purpose input if P96DDR is cleared to "0," or system clock output if P96DDR is set to "1." Pin P97: In modes 1 and 2 and slave mode, this pin is used for input of the WAIT bus control signal or WE dual-port RAM interface control signal. It is unaffected by the values in P9DDR and P9DR, except that software can turn on its MOS pull-up by clearing its data direction bit to "0" and setting its data bit to "1." In mode 3 (single-chip mode) with the dual-port RAM disabled (DPME = "0"), this pin can be used for general-purpose input or output. Reset: In the single-chip mode (mode 3), a reset initializes all pins of port 9 to the general-purpose input function with the MOS pull-ups off. In the expanded modes (modes 1 and 2), P90 to P92 are initialized as input port pins, and P93 to P97 are initialized to their bus control and system clock output functions. Hardware Standby Mode: All pins are placed in the high-impedance state with their MOS pullups off.
116
Software Standby Mode: All pins remain in their previous state. For RD, WR, AS, and O this means the High output state. Figures 5-20 to 5-25 show schematic diagrams of port 9.
Reset R Q D P90 DDR C WP9D Reset P9 0 R Q D P90 DR C WP9 Internal data bus A/D converter module ADTRG IRQ2 input WP8D: Write Port 8 DDR WP8: Write Port 8 RP8: Read Port 8 IRQ enable register IRQ2 enable
RP9
Figure 5-20. Port 9 Schematic Diagram (Pin P90)
117
Reset R Q D P9n DDR C WP9D Reset P9 n R Q D P9n DR C WP9 Internal data bus IRQ0 input IRQ1 input IRQ enable register IRQ0 enable IRQ1 enable
RP9
WP9D: Write Port 9 DDR WP9: Write Port 9 RP9: Read Port 9 n = 1, 2
Figure 5-21. Port 9 Schematic Diagram (Pins P91 to P92)
Figure 5-21
118
DPME Mode 3
Hardware standby
Mode 1 or 2
Reset
R D Q P9n DDR C Mode 3 Internal data bus WP9D Reset R D Q P9n DR C Mode 1 or 2 WP9
P9 n
RD output WR output
RP9
Dual-port RAM module CS input OE input
WP9D: Write Port 9 DDR WP9: Write Port 9 RP9: Read Port 9 n: 3, 4
Figure 5-22. Port 9 Schematic Diagram (Pins P93 and P94)
119
DPME Mode 3
Hardware standby
Mode 1 or 2
Reset R D Q P95 DDR C WP9D Internal data bus
Dual-port RAM module RDY output
Reset P9 5 * Mode 1 or 2 R D Q P95 DR C WP9
AS output
RP9
WP9D: Write Port 9 DDR WP9: Write Port 9 RP9: Read Port 9 * NMOS open drain if DPME="1" (Slave mode)
Figure 5-23. Port 9 Schematic Diagram (Pin P95)
120
Hardware standby
Mode1,2 Reset S R Q D P96 DDR C * WP9D Reset R D Q P96 DR C WP9 Internal data bus o
P9 6
RP9
WP9D: Write Port 9 DDR WP9: Write Port 9 RP9: Read Port 9 * Set-priority
Figure 5-24. Port 9 Schematic Diagram (Pin P96)
121
DPME Mode 3
Mode 1 or 2
Reset R D Q P97 DDR C WP9D Reset Internal data bus WAIT input Dual-port RAM module WE input
P9 7
R D Q P97 DR C WP9
RP9
WP9D: Write Port 9 DDR WP9: Write Port 9 RP9: Read Port 9
Figure 5-25. Port 9 Schematic Diagram (Pin P97)
122
Section 6. 16-Bit Free-Running Timer
6.1 Overview
The H8/330 has an on-chip 16-bit free-running timer (FRT) module that uses a 16-bit free-running counter as a time base. Applications of the FRT module include rectangular-wave output (up to two independent waveforms), input pulse width measurement, and measurement of external clock periods. 6.1.1 Features The features of the free-running timer module are listed below. * Selection of four clock sources The free-running counter can be driven by an internal clock source (O/2, O/8, or O/32), or an external clock input (enabling use as an external event counter). * Two independent comparators Each comparator can generate an independent waveform. * Four input capture channels The current count can be captured on the rising or falling edge (selectable) of an input signal. The four input capture registers can be used separately, or in a buffer mode. * Counter can be cleared under program control The free-running counters can be cleared on compare-match A. * Seven independent interrupts Compare-match A and B, input capture A to D, and overflow interrupts are requested independently. 6.1.2 Block Diagram Figure 6-1 shows a block diagram of the free-running timer.
123
External clock source FTCI Clock select
Internal clock sources O/2 O/8 O/32 Clock Comparematch A OCRA (H/L)
Comparator A
FTOA FTOB
Overflow Clear Bus interface FRC (H/L) Internal data bus
Comparematch B
Comparator B
OCRB (H/L) Control logic FTIA FTIB FTIC FTID TCSR TIER TCR TOCR ICIA ICIB ICIC ICID OCIA OCIB FOVI FRC: OCRA, B: ICRA, B, C, D: TCSR:
Capture
ICRA (H/L) ICRB (H/L) ICRC (H/L) ICRD (H/L)
Interrupt signals
Free-Running Counter (16 bits) Output Compare Register A, B (16 bits) Input Capture Register A, B, C, D (16 bits) Timer Control/Status Register (8 bits)
TIER: Timer Interrupt Enable Register (8 bits) TCR: Timer Control Register (8 bits) TOCR: Timer Output Compare Control Register (8 bits)
Figure 6-1. Block Diagram of 16-Bit Free-Running Timer
124
Module data bus
6.1.3 Input and Output Pins Table 6-1 lists the input and output pins of the free-running timer module. Table 6-1. Input and Output Pins of Free-Running Timer Module Name Counter clock input Output compare A Output compare B Input capture A Input capture B Input capture C Input capture D Abbreviation FTCI FTOA FTOB FTIA FTIB FTIC FTID I/O Input Output Output Input Input Input Input Function Input of external free-running counter clock signal Output controlled by comparator A Output controlled by comparator B Trigger for capturing current count into input capture register A Trigger for capturing current count into input capture register B Trigger for capturing current count into input capture register C Trigger for capturing current count into input capture register D
6.1.4 Register Configuration Table 6-2 lists the registers of the free-running timer module. Table 6-2. Register Configuration Initial Address H'FF90 H'FF91 H'FF92 H'FF93 H'FF94 H'FF95 H'FF96 H'FF97 H'FF98 H'FF99
Name Timer interrupt enable register Timer control/status register Free-running counter (High) Free-running counter (Low) Output compare register A/B (High)*2 Output compare register A/B (Low)*2 Timer control register Timer output compare control register Input capture register A (High) Input capture register A (Low)
Abbreviation TIER TCSR FRC (H) FRC (L) OCRA/B (H) OCRA/B (L) TCR TOCR ICRA (H) ICRA (L)
R/W R/W R/(W)*1 R/W R/W R/W R/W R/W R/W R R
value H'01 H'00 H'00 H'00 H'FF H'FF H'00 H'E0 H'00 H'00
Notes: *1 Software can write a "0" to clear bits 7 to 1, but cannot write a "1" in these bits. *2 OCRA and OCRB share the same addresses. Access is controlled by the OCRS bit in TOCR.
125
Table 6-2. Register Configuration (cont.) Initial Address H'FF9A H'FF9B H'FF9C H'FF9D H'FF9E H'FF9F
Name Input capture register B (High) Input capture register B (Low) Input capture register C (High) Input capture register C (Low) Input capture register D (High) Input capture register D (Low)
Abbreviation ICRB (H) ICRB (L) ICRC (H) ICRC (L) ICRD (H) ICRD (L)
R/W R R R R R R
value H'00 H'00 H'00 H'00 H'00 H'00
6.2 Register Descriptions
6.2.1 Free-Running Counter (FRC) - H'FF92 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Initial 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 value Read/ R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Write The FRC is a 16-bit readable/writable up-counter that increments on an internal pulse generated from a clock source. The clock source is selected by the clock select 1 and 0 bits (CKS1 and CKS0) of the timer control register (TCR). When the FRC overflows from H'FFFF to H'0000, the overflow flag (OVF) in the timer control/status register (TCSR) is set to "1." Because the FRC is a 16-bit register, a temporary register (TEMP) is used when the FRC is written or read. See section 6.3, "CPU Interface" for details. The FRC is initialized to H'0000 at a reset and in the standby modes. It can also be cleared by compare-match A.
126
6.2.2 Output Compare Registers A and B (OCRA and OCRB) - H'FF94 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Initial 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 value Read/ R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Write OCRA and OCRB are 16-bit readable/writable registers, the contents of which are continually compared with the value in the FRC. When a match is detected, the corresponding output compare flag (OCFA or OCFB) is set in the timer control/status register (TCSR). In addition, if the output enable bit (OEA or OEB) in the timer output compare control register (TOCR) is set to "1," when the output compare register and FRC values match, the logic level selected by the output level bit (OLVLA or OLVLB) in the TOCR is output at the output compare pin (FTOA or FTOB). OCRA and OCRB share the same address. They are differentiated by the OCRS bit in the TOCR. A temporary register (TEMP) is used for write access, as explained in section 6.3, "CPU Interface." OCRA and OCRB are initialized to H'FFFF at a reset and in the standby modes. 6.2.3 Input Capture Registers A to D (ICRA to ICRD) - H'FF98, H'FF9A, H'FF9C, H'FF9E Bit 15 14 0 R 13 0 R 12 0 R 11 0 R 10 0 R 9 0 R 8 0 R 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R 2 0 R 1 0 R 0 0 R
Initial 0 value Read/ R Write
Each input capture register is a 16-bit read-only register. When the rising or falling edge of the signal at an input capture pin (FTIA to FTID) is detected, the current value of the FRC is copied to the corresponding input capture register (ICRA to ICRD). At the same time, the corresponding input capture flag (ICFA to ICFD) in the timer control/status register (TCSR) is set to "1." The input capture edge is selected by the input edge select bits (IEDGA to IEDGD) in the timer interrupt enable register (TIER).
127
Input capture can be buffered by using the input capture registers in pairs. When the BUFEA bit in the timer control register (TCR) is set to "1," ICRC is used as a buffer register for ICRA as shown in Figure 6-2. When an FTIA input is received, the old ICRA contents are moved into ICRC, and the new FRC count is copied into ICRA.
BUFEA IEDGA IEDGC
FTIA
Edge detect and capture signal generating circuit
ICRC BUFEA: IEDGA: IEDGC: ICRC: ICRA: FRC: Buffer Enable A Input Edge Select A Input Edge Select C Input Capture Register C Input Capture Register A Free-Running Counter
ICRA
FRC
Figure 6-2. Input Capture Buffering Similarly, when the BUFEB bit in TIER is set to "1," ICRD is used as a buffer register for ICRB. When input capture is buffered, if the two input edge bits are set to different values (IEDGA IEDGC or IEDGB IEDGD), then input capture is triggered on both the rising and falling edges of the FTIA or FTIB input signal. If the two input edge bits are set to the same value (IEDGA = IEDGC or IEDGB = IEDGD), then input capture is triggered on only one edge. Because the input capture registers are 16-bit registers, a temporary register (TEMP) is used when they are read. See Section 6.3, "CPU Interface" for details. To ensure input capture, the width of the input capture pulse (FTIA, FTIB, FTIC, FTID) should be at least 1.5 system clock periods (1.5*O). When triggering is enabled on both edges, the input capture pulse width should be at least 2.5 system clock periods.
O FTIA, FTIB, FTIC, or FTID
Figure 6-3. Minimum Input Capture Pulse Width
128
The input capture registers are initialized to H'0000 at a reset and in the standby modes. Note: When input capture is detected, the FRC value is transferred to the input capture register even if the input capture flag is already set. 6.2.4 Timer Interrupt Enable Register (TIER) - H'FF90 Bit Initial value Read/Write 7 ICIAE 0 R/W 6 ICIBE 0 R/W 5 ICICE 0 R/W 4 ICIDE 0 R/W 3 2 OCIAE OCIBE 0 0 R/W R/W 1 OVIE 0 R/W 0 -- 1 --
The TIER is an 8-bit readable/writable register that enables and disables interrupts. The TIER is initialized to H'01 (all interrupts disabled) at a reset and in the standby modes. Bit 7 - Input Capture Interrupt A Enable (ICIAE): This bit selects whether to request input capture interrupt A (ICIA) when input capture flag A (ICFA) in the timer status/control register (TCSR) is set to "1." Bit 7 ICIAE 0 1
Description Input capture interrupt request A (ICIA) is disabled. Input capture interrupt request A (ICIA) is enabled.
(Initial value)
Bit 6 - Input Capture Interrupt B Enable (ICIBE): This bit selects whether to request input capture interrupt B (ICIB) when input capture flag B (ICFB) in the timer status/control register (TCSR) is set to "1." Bit 6 ICIBE 0 1
Description Input capture interrupt request B (ICIB) is disabled. Input capture interrupt request B (ICIB) is enabled.
(Initial value)
Bit 5 - Input Capture Interrupt C Enable (ICICE): This bit selects whether to request input capture interrupt C (ICIC) when input capture flag C (ICFC) in the timer status/control register (TCSR) is set to "1."
129
Bit 5 ICICE 0 1
Description Input capture interrupt request C (ICIC) is disabled. Input capture interrupt request C (ICIC) is enabled.
(Initial value)
Bit 4 - Input Capture Interrupt D Enable (ICIDE): This bit selects whether to request input capture interrupt D (ICID) when input capture flag D (ICFD) in the timer status/control register (TCSR) is set to "1." Bit 4 ICIDE 0 1
Description Input capture interrupt request D (ICID) is disabled. Input capture interrupt request D (ICID) is enabled.
(Initial value)
Bit 3 - Output Compare Interrupt A Enable (OCIAE): This bit selects whether to request output compare interrupt A (OCIA) when output compare flag A (OCFA) in the timer status/control register (TCSR) is set to "1." Bit 3 OCIAE 0 1
Description Output compare interrupt request A (OCIA) is disabled. Output compare interrupt request A (OCIA) is enabled.
(Initial value)
Bit 2 - Output Compare Interrupt B Enable (OCIBE): This bit selects whether to request output compare interrupt B (OCIB) when output compare flag B (OCFB) in the timer status/control register (TCSR) is set to "1." Bit 2 OCIBE 0 1
Description Output compare interrupt request B (OCIB) is disabled. Output compare interrupt request B (OCIB) is enabled.
(Initial value)
Bit 1 - Timer overflow Interrupt Enable (OVIE): This bit selects whether to request a freerunning timer overflow interrupt (FOVI) when the timer overflow flag (OVF) in the timer status/control register (TCSR) is set to "1."
130
Bit 1 OVIE 0 1
Description Timer overflow interrupt request (FOVI) is disabled. Timer overflow interrupt request (FOVI) is enabled.
(Initial value)
Bit 0 - Reserved: This bit cannot be modified and is always read as "1." 6.2.5 Timer Control/Status Register (TCSR) - H'FF91 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 ICFA ICFB ICFC ICFD OCFA OCFB OVF CCLRA 0 0 0 0 0 0 0 0 R/(W)* R/(W)* R/(W)* R/(W)* R/(W)* R/(W)* R/(W)* R/W
The TCSR is an 8-bit readable and partially writable* register contains the seven interrupt flags and specifies whether to clear the counter on compare-match A (when the FRC and OCRA values match). * Software can write a "0" in bits 7 to 1 to clear the flags, but cannot write a "1" in these bits. The TCSR is initialized to H'00 at a reset and in the standby modes. Bit 7 - Input Capture Flag A (ICFA): This status bit is set to "1" to flag an input capture A event. If BUFEA = "0," ICFA indicates that the FRC value has been copied to ICRA. If BUFEA = "1," ICFA indicates that the old ICRA value has been moved into ICRC and the new FRC value has been copied to ICRA. ICFA must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 7 ICFA 0 1
Description To clear ICFA, the CPU must read ICFA after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when an FTIA input signal causes the FRC value to be copied to ICRA.
(Initial value)
131
Bit 6 - Input Capture Flag B (ICFB): This status bit is set to "1" to flag an input capture B event. If BUFEB = "0," ICFB indicates that the FRC value has been copied to ICRB. If BUFEB = "1," ICFB indicates that the old ICRB value has been moved into ICRD and the new FRC value has been copied to ICRB. ICFB must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 6 ICFB 0 1
Description To clear ICFB, the CPU must read ICFB after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when an FTIB input signal causes the FRC value to be copied to ICRB.
(Initial value)
Bit 5 - Input Capture Flag C (ICFC): This status bit is set to "1" to flag input of a rising or falling edge of FTIC as selected by the IEDGC bit. When BUFEA = "0," this indicates capture of the FRC count in ICRC. When BUFEA = "1," however, the FRC count is not captured, so ICFC becomes simply an external interrupt flag. In other words, the buffer mode frees FTIC for use as a general-purpose interrupt signal (which can be enabled or disabled by the ICICE bit). ICFC must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 5 ICFC 0 1
Description To clear ICFC, the CPU must read ICFC after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when an FTIC input signal is received.
(Initial value)
Bit 4 - Input Capture Flag D (ICFD): This status bit is set to "1" to flag input of a rising or falling edge of FTID as selected by the IEDGD bit. When BUFEB = "0," this indicates capture of the FRC count in ICRD. When BUFEB = "1," however, the FRC count is not captured, so ICFD becomes simply an external interrupt flag. In other words, the buffer mode frees FTID for use as a general-purpose interrupt signal (which can be enabled or disabled by the ICIDE bit). ICFD must be cleared by software. It is set by hardware, however, and cannot be set by software.
132
Bit 4 ICFD 0 1
Description To clear ICFD, the CPU must read ICFD after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when an FTID input signal is received.
(Initial value)
Bit 3 - Output Compare Flag A (OCFA): This status flag is set to "1" when the FRC value matches the OCRA value. This flag must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 3 OCFA 0 1
Description To clear OCFA, the CPU must read OCFA after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when FRC = OCRA.
(Initial value)
Bit 2 - Output Compare Flag B (OCFB): This status flag is set to "1" when the FRC value matches the OCRB value. This flag must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 2 OCFB 0 1
Description To clear OCFB, the CPU must read OCFB after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when FRC = OCRB.
(Initial value)
Bit 1 - Timer Overflow Flag (OVF): This status flag is set to "1" when the FRC overflows (changes from H'FFFF to H'0000). This flag must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 1 OVF 0 1
Description To clear OVF, the CPU must read OVF after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when FRC changes from H'FFFF to H'0000.
(Initial value)
133
Bit 0 - Counter Clear A (CCLRA): This bit selects whether to clear the FRC at compare-match A (when the FRC and OCRA values match). Bit 0 CCLRA Description 0 The FRC is not cleared. 1 The FRC is cleared at compare-match A. 6.2.6 Timer Control Register (TCR) - H'FF96 Bit Initial value Read/Write 7 6 5 4 3 2 IEDGA IEDGB IEDGC IEDGD BUFEA BUFEB 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W 1 CKS1 0 R/W 0 CKS0 0 R/W
(Initial value)
The TCR is an 8-bit readable/writable register that selects the rising or falling edge of the input capture signals, enables the input capture buffer mode, and selects the FRC clock source. The TCR is initialized to H'00 at a reset and in the standby modes. Bit 7 - Input Edge Select A (IEDGA): This bit causes input capture A events to be recognized on the selected edge of the input capture A signal (FTIA). Bit 7 IEDGA 0 1
Description Input capture A events are recognized on the falling edge of FTIA. Input capture A events are recognized on the rising edge of FTIA.
(Initial value)
Bit 6 - Input Edge Select B (IEDGB): This bit causes input capture B events to be recognized on the selected edge of the input capture B signal (FTIB). Bit 6 IEDGB 0 1
Description Input capture B events are recognized on the falling edge of FTIB. Input capture B events are recognized on the rising edge of FTIB.
(Initial value)
134
Bit 5 - Input Edge Select C (IEDGC): This bit causes input capture C events to be recognized on the selected edge of the input capture C signal (FTIC). In buffer mode (when BUFEA = "1"), it also causes input capture A events to be recognized on the selected edge of FTIA. Bit 5 IEDGC 0 1
Description Input capture C events are recognized on the falling edge of FTIC. Input capture C events are recognized on the rising edge of FTIC.
(Initial value)
Bit 4 - Input Edge Select D (IEDGD): This bit causes input capture D events to be recognized on the selected edge of the input capture D signal (FTID). In the buffer mode (when BUFEB = "1"), it also causes input capture B events to be recognized on the selected edge of FTIB. Bit 4 IEDGD 0 1
Description Input capture D events are recognized on the falling edge of FTID. Input capture D events are recognized on the rising edge of FTID.
(Initial value)
Bit 3 - Buffer Enable A (BUFEA): This bit selects whether to use ICRC as a buffer register for ICRA. Bit 3 BUFEA 0 1
Description ICRC is used for input capture C. (Initial value) ICRC is used as a buffer register for input capture A. Input C is not captured.
Bit 2 - Buffer Enable B (BUFEB): This bit selects whether to use ICRD as a buffer register for ICRB. Bit 2 BUFEB 0 1
Description ICRD is used for input capture D. (Initial value) ICRD is used as a buffer register for input capture B. Input D is not captured.
Bits 1 and 0 - Clock Select (CKS1 and CKS0): These bits select external clock input or one of three internal clock sources for the FRC. External clock pulses are counted on the rising edge.
135
Bit 1 CKS1 0 0 1 1
Bit 0 CKS0 0 1 0 1
Description O/2 Internal clock source O/8 Internal clock source O/32 Internal clock source External clock source (rising edge)
(Initial value)
6.2.7 Timer Output Compare Control Register (TOCR) - H'FF97 Bit Initial value Read/Write 7 -- 1 -- 6 -- 1 -- 5 -- 1 -- 4 OCRS 0 R/W 3 OEA 0 R/W 2 OEB 0 R/W 1 0 OLVLA OLVLB 0 0 R/W R/W
The TOCR is an 8-bit readable/writable register that controls the output compare function. The TOCR is initialized to H'E0 at a reset and in the standby modes. Bits 7 to 5 - Reserved: These bits cannot be modified and are always read as "1." Bit 4 - Output Compare Register Select (OCRS): When the CPU accesses addresses H'FF94 and H'FF95, this bit directs the access to either OCRA or OCRB. These two registers share the same addresses as follows: Upper byte of OCRA and upper byte of OCRB: H'FF94 Lower byte of OCRA and lower byte of OCRB: H'FF95 Bit 4 OCRS 0 1
Description The CPU can access OCRA. The CPU can access OCRB.
(Initial value)
Bit 3 - Output Enable A (OEA): This bit enables or disables output of the output compare A signal (FTOA). When output compare A is disabled, the corresponding pin is used as a generalpurpose input/output port. Bit 3 OEA 0 1
Description Output compare A output is disabled. Output compare A output is enabled.
(Initial value)
136
Bit 2 - Output Enable B (OEB): This bit enables or disables output of the output compare B signal (FTOB). When output compare B is disabled, the corresponding pin is used as a generalpurpose input/output or interrupt port. Bit 2 OEB Description 0 Output compare B output is disabled. 1 Output compare B output is enabled.
(Initial value)
Bit 1 - Output Level A (OLVLA): This bit selects the logic level to be output at the FTOA pin when the FRC and OCRA values match. Bit 1 OLVLA 0 1
Description A "0" logic level (Low) is output for compare-match A. A "1" logic level (High) is output for compare-match A.
(Initial value)
Bit 0 - Output Level B (OLVLB): This bit selects the logic level to be output at the FTOB pin when the FRC and OCRB values match. Bit 0 OLVLB 0 1
Description A "0" logic level (Low) is output for compare-match B. A "1" logic level (High) is output for compare-match B.
(Initial value)
6.3 CPU Interface
The free-running counter (FRC), output compare registers (OCRA and OCRB), and input capture registers (ICRA to ICRD) are 16-bit registers, but they are connected to an 8-bit data bus. When the CPU accesses these registers, to ensure that both bytes are written or read simultaneously, the access is performed using an 8-bit temporary register (TEMP). These registers are written and read as follows: * Register Write When the CPU writes to the upper byte, the byte of write data is placed in TEMP. Next, when the CPU writes to the lower byte, this byte of data is combined with the byte in TEMP and all 16 bits are written in the register simultaneously.
137
* Register Read When the CPU reads the upper byte, the upper byte of data is sent to the CPU and the lower byte is placed in TEMP. When the CPU reads the lower byte, it receives the value in TEMP. (As an exception, when the CPU reads OCRA or OCRB, it reads both the upper and lower bytes directly, without using TEMP.) Programs that access these registers should normally use word access. Equivalently, they may access first the upper byte, then the lower byte by two consecutive byte accesses. Data will not be transferred correctly if the bytes are accessed in reverse order, if only one byte is accessed, or if the upper and lower bytes are accessed separately and another register is accessed in between, altering the value in TEMP. Coding Examples To write the contents of general register R0 to OCRA: To transfer the contents of ICRA to general register R0:
MOV.W MOV.W
R0, @OCRA @ICRA, R0
Figure 6-4 shows the data flow when the FRC is accessed. The other registers are accessed in the same way.
(1) Upper byte write
CPU writes data H'AA
Module data bus Bus interface
TEMP [H'AA]
FRC H [ ] (2) Lower byte write
FRC L [ ]
CPU writes data H'55
Module data bus Bus interface
TEMP [H'AA]
FRC H [H'AA]
FRC L [H'55]
Figure 6-4 (a). Write Access to FRC (When CPU Writes H'AA55)
138
(1) Upper byte read
CPU writes data H'AA
Module data bus Bus interface
TEMP [H'55]
FRC H [H'AA]
FRC L [H'55]
(2) Lower byte read
CPU writes data H'55
Module data bus Bus interface
TEMP [H'55]
FRC H [ ]
FRC L [ ]
Figure 6-4 (b). Read Access to FRC (When FRC Contains H'AA55)
6.4 Operation
6.4.1 FRC Incrementation Timing The FRC increments on a pulse generated once for each period of the selected (internal or external) clock source. The internal clock sources are created from the system clock (O) by a prescaler. The FRC increments on a pulse generated from the falling edge of the prescaler output. See Figure 6-5.
139
O
Prescaler output
FRC clock pulse
FRC
N -1
N
N+1
Figure 6-5. Increment Timing for Internal Clock Source If external clock input is selected, the FRC increments on the rising edge of the FTCI clock signal. Figure 6-6 shows the increment timing. The pulse width of the external clock signal must be at least 1.5 system clock (O) periods. The counter will not increment correctly if the pulse width is shorter than one O period.
O
FTCI
FRC clock pulse
FRC
N
N+1
Figure 6-6. Increment Timing for External Clock Source
O
FTCI
Figure 6-7. Minimum External Clock Pulse Width
140
6.4.2 Output Compare Timing (1) Setting of Output Compare Flags A and B (OCFA and OCFB): The output compare flags are set to "1" by an internal compare-match signal generated when the FRC value matches the OCRA or OCRB value. This compare-match signal is generated at the last state in which the two values match, just before the FRC increments to a new value. Accordingly, when the FRC and OCR values match, the compare-match signal is not generated until the next period of the clock source. Figure 6-8 shows the timing of the setting of the output compare flags.
O
FRC
N
N+1
OCRA or OCRB OCR
N
Internal comparematch signal
OCFA or OCFB
Figure 6-8. Setting of Output Compare Flags (2) Timing of Output Compare Flag (OCFA or OCFB) Clearing: The output compare flag OCFA or OCFB is cleared when the CPU writes a "0" in this bit.
Write cycle: CPU writes "0" in OCFA or OCFB T1 T2 T3
O
OCFA or OCFB
Figure 6-9. Clearing of Output Compare Flag
141
(3) Output Timing: When a compare-match occurs, the logic level selected by the output level bit (OLVLA or OLVLB) in TOCR is output at the output compare pin (FTOA or FTOB). Figure 610 shows the timing of this operation for compare-match A.
O
FRC
N
N+1
N
N+1
OCRA
N
N
Internal comparematch A signal Clear * OLVLA
FTOA
* Cleared by software
Figure 6-10. Timing of Output Compare A (4) FRC Clear Timing: If the CCLRA bit in the TCSR is set to "1," the FRC is cleared when compare-match A occurs. Figure 6-11 shows the timing of this operation.
Figure 6-10
O
Internal comparematch A signal
FRC
N
H'0000
Figure 6-11. Clearing of FRC by Compare-Match A 6.4.3 Input Capture Timing (1) Input Capture Timing: An internal input capture signal is generated from the rising or falling edge of the signal at the input capture pin FTIx (x = A, B, C, D), as selected by the corresponding IEDGx bit in TCR. Figure 6-12 shows the usual input capture timing when the rising edge is selected (IEDGx = "1").
142
O
Input at FTI pin
Internal input capture signal
Figure 6-12. Input Capture Timing (Usual Case) If the upper byte of ICRx is being read when the input capture signal arrives, the internal input capture signal is delayed by one state. Figure 6-13 shows the timing for this case.
Read cycle: CPU reads upper byte of ICR T1 T2 T3
O
Input at FTI pin
Internal input capture signal
Figure 6-13. Input Capture Timing (1-State Delay) In buffer mode, this delay occurs if the CPU is reading either of the two registers concerned. When ICRA and ICRC are used in buffer mode, for example, if the upper byte of either ICRA or ICRC is being read when the FTIA input arrives, the internal input capture signal is delayed by one state. Figure Figure 6-14 shows the timing for this case. The case of ICRB and ICRD is similar. 6-13
Read cycle: CPU reads upper byte of ICRA or ICRC T1 T2 T3
O
Input at FTIA pin
Internal input capture signal
Figure 6-14. Input Capture Timing (1-State Delay, Buffer Mode)
143
Figure 6-14
Figure 6-15 shows how input capture operates when ICRA and ICRC are used in buffer mode and IEDGA and IEDGC are set to different values (IEDGA = 0 and IEDGC = 1, or IEDGA = 1 and IEDGC = 0), so that input capture is performed on both the rising and falling edges of FTIA.
O
FTIA
Internal input capture signal
FRC
n
n+1
N
N+1
ICRA
n
n
N
ICRC
n
Figure 6-15. Buffered Input Capture with Both Edges Selected In this mode, FTIC does not cause the FRC contents to be copied to ICRC. However, input capture flag C still sets on the edge of FTIC selected by IEDGC, and if the interrupt enable bit (ICICE) is set, a CPU interrupt is requested. The situation when ICRB and ICRD are used in buffer mode is similar. (2) Timing of Input Capture Flag (ICF) Setting: The input capture flag ICFx (x = A, B, C, D) is set to "1" by the internal input capture signal. Figure 6-16 shows the timing of this operation.
O
Internal input capture signal
ICF
FRC
N
ICR
N
Figure 6-16. Setting of Input Capture Flag
144
(3) Timing of Input Capture Flag (ICF) Clearing: The input capture flag ICFx (x = A, B, C, D) is cleared when the CPU writes a "0" in this bit.
Write cycle: CPU writes "0" in ICFx
T1
T2
T3
O
ICFx
Figure 6-17. Clearing of Input Capture Flag 6.4.4 Setting of FRC Overflow Flag (OVF) The FRC overflow flag (OVF) is set to "1" when the FRC overflows (changes from H'FFFF to Figure 6-17 H'0000). Figure 6-18 shows the timing of this operation.
O
FRC
H'FFFF
H'0000
Internal overflow signal
OVF
Figure 6-18. Setting of Overflow Flag (OVF) (2) Timing of Overflow Flag (OVF) Clearing: The overflow flag is cleared when the CPU writes a "0" in this bit.
Write cycle: CPU writes "0" in OVF T1 T2 T3
O
OVF
Figure 6-19. Clearing of Overflow Flag
145
6.5 Interrupts
The free-running timer channel can request seven types of interrupts: input capture A to D (ICIA, ICIB, ICIC, ICID), output compare A and B (OCIA and OCIB), and overflow (FOVI). Each interrupt is requested when the corresponding enable and flag bits are set. Independent signals are sent to the interrupt controller for each type of interrupt. Table 6-3 lists information about these interrupts. Table 6-3. Free-Running Timer Interrupts Interrupt ICIA ICIB ICIC ICID OCIA OCIB FOVI Description Requested when ICFA and ICIAE are set Requested when ICFB and ICIBE are set Requested when ICFC and ICICE are set Requested when ICFD and ICIDE are set Requested when OCFA and OCIAE are set Requested when OCFB and OCIBE are set Requested when OVF and OVIE are set Priority High
Low
6.6 Sample Application
In the example below, the free-running timer channel is used to generate two square-wave outputs with a 50% duty factor and arbitrary phase relationship. The programming is as follows: (1) The CCLRA bit in the TCSR is set to "1." (2) Each time a compare-match interrupt occurs, software inverts the corresponding output level bit in TOCR (OLVLA or OLVLB).
FRC Clear counter
H'FFFF OCRA OCRB H'0000
FTOA
FTOB
Figure 6-20. Square-Wave Output (Example)
146
6.7 Application Notes
Application programmers should note that the following types of contention can occur in the freerunning timers. (1) Contention between FRC Write and Clear: If an internal counter clear signal is generated during the T3 state of a write cycle to the lower byte of the free-running counter, the clear signal takes priority and the write is not performed. Figure 6-21 shows this type of contention.
Write cycle: CPU write to lower byte of FRC
T1
T2
T3
O
Internal address bus
FRC address
Internal write signal
FRC clear signal
FRC
N
H'0000
Figure 6-21. FRC Write-Clear Contention (2) Contention between FRC Write and Increment: If an FRC increment pulse is generated Figure 6-21 during the T3 state of a write cycle to the lower byte of the free-running counter, the write takes priority and the FRC is not incremented. Figure 6-22 shows this type of contention.
147
Write cycle: CPU write to lower byte of FRC
T1
T2
T3
O
Internal address bus
FRC address
Internal write signal
FRC clock pulse
FRC
N
M
Write data
Figure 6-22. FRC Write-Increment Contention (3) Contention between OCR Write and Compare-Match: If a compare-match occurs during the T3 state of a write cycle to the lower byte of OCRA or OCRB, the write takes precedence and Figure 6-22 the compare-match signal is inhibited. Figure 6-23 shows this type of contention.
148
Write cycle: CPU write to lower byte of OCRA or OCRB T1 T2 T3
O
Internal address bus
OCR address
Internal write signal
FRC
N
N+1
OCRA or OCRB
N Write data
M
Compare-match A or B signal Inhibited
Figure 6-23. Contention between OCR Write and Compare-Match (4) Incrementation Caused by Changing of Internal Clock Source: When an internal clock source is changed, the changeover may cause the FRC to increment. This depends on the time at which the clock select bits (CKS1 and CKS0) are rewritten, as shown in Table 6-4. The pulse that increments the FRC is generated at the falling edge of the internal clock source. If clock sources are changed when the old source is High and the new source is Low, as in case No. 3 in Table 6-5, the changeover generates a falling edge that triggers the FRC increment clock pulse. Switching between an internal and external clock source can also cause the FRC to increment.
149
Table 6-4. Effect of Changing Internal Clock Sources No. Description Low Low: CKS1 and CKS0 are rewritten while both clock sources are Low. Timing chart
Old clock source
1
New clock source
FRC clock pulse
FRC
N
N +1
CKS rewrite
2
Low High: CKS1 and CKS0 are rewritten while old clock source is Low and new clock source is High.
Old clock source
New clock source
FRC clock pulse
FRC
N
N +1
N +2 CKS rewrite
3
High Low: CKS1 and CKS0 are rewritten while old clock source is High and new clock source is Low.
Old clock source
New clock source
*
FRC clock pulse
FRC
N
N +1
N +2
CKS rewrite
* The switching of clock sources is regarded as a falling edge that increments the FRC.
150
Table 6-4. Effect of Changing Internal Clock Sources (cont.) No. Description High High: CKS1 and CKS0 are rewritten while both clock sources are High. Timing chart
Old clock source
4
New clock source
FRC clock pulse
FRC
N
N +1
N+2
CKS rewrite
151
Section 7. 8-Bit Timers
7.1 Overview
The H8/330 chip includes an 8-bit timer module with two channels (TMR0 and TMR1). Each channel has an 8-bit counter (TCNT) and two time constant registers (TCORA and TCORB) that are constantly compared with the TCNT value to detect compare-match events. One application of the 8-bit timer module is to generate a rectangular-wave output with an arbitrary duty factor. 7.1.1 Features The features of the 8-bit timer module are listed below. * Selection of four clock sources The counters can be driven by an internal clock signal (O/8, O/64, or O/1024) or an external clock input (enabling use as an external event counter). * Selection of three ways to clear the counters The counters can be cleared on compare-match A or B, or by an external reset signal. * Timer output controlled by two time constants The timer output signal in each channel is controlled by two independent time constants, enabling the timer to generate output waveforms with an arbitrary duty factor. * Three independent interrupts Compare-match A and B and overflow interrupts can be requested independently. 7.1.2 Block Diagram Figure 7-1 shows a block diagram of one channel in the 8-bit timer module. The other channel is identical.
153
External clock source TMCI Clock select
Internal clock sources O/8 O/64 O/1024 Clock Comparematch A TCORA
Comparator A
TMRI
Bus interface
Clear
TCNT
Module data bus
TMO
Overflow
Internal data bus
Control logic
Comparematch B
Comparator B
TCORB
TCSR
TCR CMIA CMIB OVI Interrupt signals TCR: TCSR: TCORA: TCORB: TCNT: Timer Control Register (8 bits) Timer Control Status Register (8 bits) Time Constant Register A (8 bits) Time Constant Register B (8 bits) Timer Counter
Figure 7-1. Block Diagram of 8-Bit Timer 7.1.3 Input and Output Pins Table 7-1 lists the input and output pins of the 8-bit timer. Table 7-1. Input and Output Pins of 8-Bit Timer Abbreviation TMR0 TMR1 TMO1 TMO0 TMCI1 TMCI0 TMRI1 TMRI0
Name Timer output Timer clock input Timer reset input
I/O Output Input Input
Function Output controlled by compare-match External clock source for the counter External reset signal for the counter
154
7.1.4 Register Configuration Table 7-2 lists the registers of the 8-bit timer module. Each channel has an independent set of registers. Table 7-2. 8-Bit Timer Registers Name Timer control register Timer control/status register Timer constant register A Timer constant register B Timer counter Abbreviation TCR TCSR TCORA TCORB TCNT R/W R/W R/(W)* R/W R/W R/W Address Initial value TMR0 H'00 H'FFC8 H'10 H'FFC9 H'FF H'FFCA H'FF H'FFCB H'00 H'FFCC TMR1 H'FFD0 H'FFD1 H'FFD2 H'FFD3 H'FFD4
* Software can write a "0" to clear bits 7 to 5, but cannot write a "1" in these bits.
7.2 Register Descriptions
7.2.1 Timer Counter (TCNT) - H'FFC8 (TMR0), H'FFD0 (TMR1) Bit 7 6 5 4 3 2 Initial value Read/Write 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W
1 0 R/W
0 0 R/W
Each timer counter (TCNT) is an 8-bit up-counter that increments on a pulse generated from one of four clock sources. The clock source is selected by clock select bits 2 to 0 (CKS2 to CKS0) of the timer control register (TCR). The CPU can always read or write the timer counter. The timer counter can be cleared by an external reset input or by an internal compare-match signal generated at a compare-match event. Clock clear bits 1 and 0 (CCLR1 and CCLR0) of the timer control register select the method of clearing. When a timer counter overflows from H'FF to H'00, the overflow flag (OVF) in the timer control/status register (TCSR) is set to "1." The timer counters are initialized to H'00 at a reset and in the standby modes.
155
7.2.2 Time Constant Registers A and B (TCORA and TCORB) - H'FFCA and H'FFCB (TMR0), H'FFD2 and H'FFD3 (TMR1) Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3 1 R/W 2 1 R/W 1 1 R/W 0 1 R/W
TCORA and TCORB are 8-bit readable/writable registers. The timer count is continually compared with the constants written in these registers. When a match is detected, the corresponding compare-match flag (CMFA or CMFB) is set in the timer control/status register (TCSR). The timer output signal (TMO0 or TMO1) is controlled by these compare-match signals as specified by output select bits 3 to 0 (OS3 to OS0) in the timer control/status register (TCSR). TCORA and TCORB are initialized to H'FF at a reset and in the standby modes. Compare-match is not detected during the T3 state of a write cycle to TCORA or TCORB. See item (3) in section 7.6, "Application Notes." 7.2.3 Timer Control Register (TCR) - H'FFC8 (TMR0), H'FFD0 (TMR1) Bit Initial value Read/Write 7 6 CMIEB CMIEA 0 0 R/W R/W 5 OVIE 0 R/W 4 3 CCLR1 CCLR0 0 0 R/W R/W 2 CKS2 0 R/W 1 CKS1 0 R/W 0 CKS0 0 R/W
Each TCR is an 8-bit readable/writable register that selects the clock source and the time at which the timer counter is cleared, and enables interrupts. The TCRs are initialized to H'00 at a reset and in the standby modes. Bit 7 - Compare-match Interrupt Enable B (CMIEB): This bit selects whether to request compare-match interrupt B (CMIB) when compare-match flag B (CMFB) in the timer control/status register (TCSR) is set to "1."
156
Bit 7 CMIEB 0 1
Description Compare-match interrupt request B (CMIB) is disabled. Compare-match interrupt request B (CMIB) is enabled.
(Initial value)
Bit 6 - Compare-match Interrupt Enable A (CMIEA): This bit selects whether to request compare-match interrupt A (CMIA) when compare-match flag A (CMFA) in the timer control/status register (TCSR) is set to "1." Bit 6 CMIEA 0 1
Description Compare-match interrupt request A (CMIA) is disabled. Compare-match interrupt request A (CMIA) is enabled.
(Initial value)
Bit 5 - Timer Overflow Interrupt Enable (OVIE): This bit selects whether to request a timer overflow interrupt (OVI) when the overflow flag (OVF) in the timer control/status register (TCSR) is set to "1." Bit 5 OVIE 0 1
Description The timer overflow interrupt request (OVI) is disabled. The timer overflow interrupt request (OVI) is enabled.
(Initial value)
Bits 4 and 3 - Counter Clear 1 and 0 (CCLR1 and CCLR0): These bits select how the timer counter is cleared: by compare-match A or B or by an external reset input. Bit 4 CCLR1 0 0 1 1 Bit 3 CCLR0 0 1 0 1
Description Not cleared. Cleared on compare-match A. Cleared on compare-match B. Cleared on rising edge of external reset input signal.
(Initial value)
Bits 2, 1, and 0 - Clock Select (CKS2, CKS1, and CKS0): These bits select the internal or external clock source for the timer counter. For the external clock source they select whether to increment the count on the rising or falling edge of the clock input, or on both edges. For the internal clock sources the count is incremented on the falling edge of the clock input.
157
Bit 2 CKS2 0 0 0 0 1 1 1 1
Bit 1 CKS1 0 0 1 1 0 0 1 1
Bit 0 CKS0 0 1 0 1 0 1 0 1
Description No clock source (timer stopped) (Initial value) O/8 Internal clock source, counted on the falling edge O/64 Internal clock source, counted on the falling edge O/1024 Internal clock source, counted on the falling edge No clock source (timer stopped) External clock source, counted on the rising edge External clock source, counted on the falling edge External clock source, counted on both the rising and falling edges
7.2.4 Timer Control/Status Register (TCSR) - H'FFC9 (TMR0), H'FFD1 (TMR1) Bit Initial value Read/Write 7 6 5 CMFB CMFA OVF 0 0 0 R/(W)* R/(W)* R/(W)* 4 -- 1 -- 3 OS3 0 R/W 2 OS2 0 R/W 1 OS1 0 R/W 0 OS0 0 R/W
* Software can write a "0" in bits 7 to 5 to clear the flags, but cannot write a "1" in these bits. The TCSR is an 8-bit readable and partially writable register that indicates compare-match and overflow status and selects the effect of compare-match events on the timer output signal. The TCSR is initialized to H'10 at a reset and in the standby modes. Bit 7 - Compare-Match Flag B (CMFB): This status flag is set to "1" when the timer count matches the time constant set in TCORB. CMFB must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 7 CMFB 0 1
Description To clear CMFB, the CPU must read CMFB after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when TCNT = TCORB.
(Initial value)
Bit 6 - Compare-Match Flag A (CMFA): This status flag is set to "1" when the timer count matches the time constant set in TCORA. CMFA must be cleared by software. It is set by hardware, however, and cannot be set by software.
158
Bit 6 CMFA 0 1
Description To clear CMFA, the CPU must read CMFA after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when TCNT = TCORA.
(Initial value)
Bit 5 - Timer Overflow Flag (OVF): This status flag is set to "1" when the timer count overflows (changes from H'FF to H'00). OVF must be cleared by software. It is set by hardware, however, and cannot be set by software. Bit 5 OVF 0 1
Description To clear OVF, the CPU must read OVF after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when TCNT changes from H'FF to H'00.
(Initial value)
Bit 4 - Reserved: This bit is always read as "1." It cannot be written. Bits 3 to 0 - Output Select 3 to 0 (OS3 to OS0): These bits specify the effect of compare-match events on the timer output signal (TCOR or TCNT). Bits OS3 and OS2 control the effect of compare-match B on the output level. Bits OS1 and OS0 control the effect of compare-match A on the output level. If compare-match A and B occur simultaneously, any conflict is resolved as explained in item (4) in section 7.6, "Application Notes." After a reset, the timer output is "0" until the first compare-match event. When all four output select bits are cleared to "0" the timer output signal is disabled. Bit 3 OS3 0 0 1 1 Bit 2 OS2 0 1 0 1
Description No change when compare-match B occurs. Output changes to "0" when compare-match B occurs. Output changes to "1" when compare-match B occurs. Output inverts (toggles) when compare-match B occurs.
(Initial value)
159
Bit 1 OS1 0 0 1 1
Bit 0 OS0 0 1 0 1
Description No change when compare-match A occurs. Output changes to "0" when compare-match A occurs. Output changes to "1" when compare-match A occurs. Output inverts (toggles) when compare-match A occurs.
(Initial value)
7.3 Operation
7.3.1 TCNT Incrementation Timing The timer counter increments on a pulse generated once for each period of the clock source selected by bits CKS2 to CKS0 of the TCR. Internal Clock: Internal clock sources are created from the system clock by a prescaler. The counter increments on an internal TCNT clock pulse generated from the falling edge of the prescaler output, as shown in figure 7-2. Bits CKS2 to CKS0 of the TCR can select one of the three internal clocks (O/8, O/64, or O/1024).
O
Prescaler output
TCNT clock pulse
TCNT
N-1
N
N+1
Figure 7-2. Count Timing for Internal Clock Input External Clock: If external clock input (TMCI) is selected, the timer counter can increment on the rising edge, the falling edge, or both edges of the external clock signal. Figure 7-3 shows incrementation on both edges of the external clock signal. The external clock pulse width must be at least 1.5 system clock periods for incrementation on a single edge, and at least 2.5 system clock periods for incrementation on both edges. See figure 7.4. The counter will not increment correctly if the pulse width is shorter than these values.
160
O
External clock source
TCNT clock pulse
TCNT
N-1
N
N+1
Figure 7-3. Count Timing for External Clock Input
O
TMCI Minimum TMCI Pulse Width (Single-Edge Incrementation)
O
TMCI Minimum TMCI Pulse Width (Double-Edge Incrementation)
Figure 7-4. Minimum External Clock Pulse Widths (Example) 7.3.2 Compare Match Timing (1) Setting of Compare-Match Flags A and B (CMFA and CMFB): The compare-match flags are set to "1" by an internal compare-match signal generated when the timer count matches the time constant in TCNT or TCOR. The compare-match signal is generated at the last state in which the match is true, just before the timer counter increments to a new value.
161
Accordingly, when the timer count matches one of the time constants, the compare-match signal is not generated until the next period of the clock source. Figure 7-5 shows the timing of the setting of the compare-match flags.
O f
TCNT
N
N+1
TCOR
N
Internal compare-match signal
CMF
Figure 7-5. Setting of Compare-Match Flags (2) Timing of Compare-Match Flag (CMFA or CMFB) Clearing: The compare-match flag CMFA or CMFB is cleared when the CPU writes a "0" in this bit.
Write cycle: CPU writes "0" in CMFA or CMFB T1 T2 T3
O
CMFA or CMFB
Figure 7-6. Clearing of Compare-Match Flags (3) Output Timing: When a compare-match event occurs, the timer output (TMO0 or TMO1) changes as specified by the output select bits (OS3 to OS0) in the TCSR. Depending on these bits, the output can remain the same, change to "0," change to "1," or toggle. If compare-match A and B occur simultaneously, the higher priority compare-match determines the output level. See item (4) in section 7.6, "Application Notes" for details.
162
Figure 7-7 shows the timing when the output is set to toggle on compare-match A.
O
Internal compare-match A signal Timer output (TMO)
Figure 7-7. Timing of Timer Output (4) Timing of Compare-Match Clear: Depending on the CCLR1 and CCLR0 bits in the TCR, the timer counter can be cleared when compare-match A or B occurs. Figure 7-8 shows the timing of this operation.
O o
Internal compare-match signal
TCNT
N
H'00
Figure 7-8. Timing of Compare-Match Clear 7.3.3 External Reset of TCNT When the CCLR1 and CCLR0 bits in the TCR are both set to "1," the timer counter is cleared on the rising edge of an external reset input. Figure 7-9 shows the timing of this operation. The timer reset pulse width must be at least 1.5 system clock periods.
163
O o
External reset input (TMRI)
Internal clear pulse
TCNT
N-1
N
H'00
Figure 7-9. Timing of External Reset 7.3.4 Setting of TCSR Overflow Flag (1) Setting of TCSR Overflow Flag (OVF): The overflow flag (OVF) is set to "1" when the timer count overflows (changes from H'FF to H'00). Figure 7-10 shows the timing of this operation.
o O
TCNT
H'FF
H'00
Internal overflow signal
OVF
Figure 7-10. Setting of Overflow Flag (OVF) (2) Timing of TCSR Overflow Flag (OVF) Clearing: The overflow flag (OVF) is cleared when the CPU writes a "0" in this bit.
164
When cycle: CPU writes "0" in OVF T1 T2 T3
O
OVF
Figure 7-11. Clearing of Overflow Flag
7.4 Interrupts
Each channel in the 8-bit timer can generate three types of interrupts: compare-match A and B (CMIA and CMIB), and overflow (OVI). Each interrupt is requested when the corresponding enable bits are set in the TCR and TCSR. Independent signals are sent to the interrupt controller for each interrupt. Table 7-3 lists information about these interrupts. Table 7-3. 8-Bit Timer Interrupts Interrupt CMIA CMIB OVI Description Requested when CMFA and CMIEA are set Requested when CMFB and CMIEB are set Requested when OVF and OVIE are set Priority High Low
7.5 Sample Application
In the example below, the 8-bit timer is used to generate a pulse output with a selected duty factor. The control bits are set as follows: (1) In the TCR, CCLR1 is cleared to "0" and CCLR0 is set to "1" so that the timer counter is cleared when its value matches the constant in TCORA. (2) In the TCSR, bits OS3 to OS0 are set to "0110," causing the output to change to "1" on compare-match A and to "0" on compare-match B. With these settings, the 8-bit timer provides output of pulses at a rate determined by TCORA with a pulse width determined by TCORB. No software intervention is required.
165
TCNT H'FF TCORA TCORB H'00 Clear counter
TMO pin
Figure 7-12. Example of Pulse Output
7.6 Application Notes
Application programmers should note that the following types of contention can occur in the 8-bit timer. (1) Contention between TCNT Write and Clear: If an internal counter clear signal is generated during the T3 state of a write cycle to the timer counter, the clear signal takes priority and the write is not performed. Figure 7-13 shows this type of contention.
Write cycle: CPU writes to TCNT T1 T2 T3
O
Internal Address bus
TCNT address
Internal write signal
Counter clear signal
TCNT
N
H'00
Figure 7-13. TCNT Write-Clear Contention
Figure 7-13
166
(2) Contention between TCNT Write and Increment: If a timer counter increment pulse is generated during the T3 state of a write cycle to the timer counter, the write takes priority and the timer counter is not incremented. Figure 7-14 shows this type of contention.
Write cycle: CPU writes to TCNT T1 T2 T3
O
Internal Address bus
TCNT address
Internal write signal
TCNT clock pulse
TCNT
N
M Write data
Figure 7-14. TCNT Write-Increment Contention
Figure compare-match occurs during (3) Contention between TCOR Write and Compare-Match: If a7-14 the T3 state of a write cycle to TCORA or TCORB, the write takes precedence and the compare-
match signal is inhibited. Figure 7-15 shows this type of contention.
167
Write cycle: CPU writes to TCORA or TCORB T1 T2 T3
O
Internal address bus
TCOR address
Internal write signal
TCNT
N
N+1
TCORA or TCORB
N
M TCOR write data
Compare-match A or B signal Inhibited
Figure 7-15. Contention between TCOR Write and Compare-Match
Figure If identical time constants (4) Contention between Compare-Match A and Compare-Match B:7-15 are written in TCORA and TCORB, causing compare-match A and B to occur simultaneously, any conflict between the output selections for compare-match A and B is resolved by following the priority order in Table 7-4.
Table 7-4. Priority of Timer Output Output selection Toggle "1" Output "0" Output No change Priority High
Low
(5) Incrementation Caused by Changing of Internal Clock Source: When an internal clock source is changed, the changeover may cause the timer counter to increment. This depends on the time at which the clock select bits (CKS2 to CKS0) are rewritten, as shown in Table 7-5.
168
The pulse that increments the timer counter is generated at the falling edge of the internal clock source signal. If clock sources are changed when the old source is High and the new source is Low, as in case No. 3 in Table 7-5, the changeover generates a falling edge that triggers the TCNT clock pulse and increments the timer counter. Switching between an internal and external clock source can also cause the timer counter to increment. This type of switching should be avoided at external clock edges. Table 7-5. Effect of Changing Internal Clock Sources No. Description Low Low*1: CKS1 and CKS0 are rewritten while both clock sources are Low. Timing chart
Old clock source
1
New clock source
TCNT clock pulse
TCNT
N
N+1
CKS rewrite
Low High*2: 2 CKS1 and CKS0 are rewritten while old clock source is Low and new clock source is High.
Old clock source
New clock source
TCNT clock pulse
TCNT
N
N+1
N+2 CKS rewrite
*1 Including a transition from Low to the stopped state (CKS1 = 0, CKS0 = 0), or a transition from the stopped state to Low. *2 Including a transition from the stopped state to High.
169
Table 7-5. Effect of Changing Internal Clock Sources (cont.) No. Description High Low*1: CKS1 and CKS0 are rewritten while old clock source is High and new clock source is Low. Timing chart
Old clock source
3
New clock source
* *32
TCNT clock pulse
TCNT
N
N+1
N+2
CKS rewrite
4
High High: CKS1 and CKS0 are rewritten while both clock sources are High.
Old clock source
New clock source
TCNT clock pulse
TCNT
N
N+1
N+2 CKS rewrite
*1 Including a transition from High to the stopped state. *2 The switching of clock sources is regarded as a falling edge that increments the TCNT.
170
Section 8. PWM Timers
8.1 Overview
The H8/330 has an on-chip pulse-width modulation (PWM) timer module with two independent channels (PWM0 and PWM1). Both channels are functionally identical. Each PWM channel generates a rectangular output pulse with a duty factor of 0 to 100%. The duty factor is specified in an 8-bit duty register (DTR). 8.1.1 Features The PWM timer module has the following features: * Selection of eight clock sources * Duty factors from 0 to 100% with 1/250 resolution * Output with positive or negative logic and software enable/disable control 8.1.2 Block Diagram Figure 8-1 shows a block diagram of one PWM timer channel.
DTR Compare-match Comparator Module data bus
Bus interface
Pulse
Output control
Internal data bus
TCNT
TCR
Clock
Clock select
TCR: DTR: TCNT:
Timer Control Register (8 bits) Duty Register (8 bits) Timer Counter (8 bits)
O/2 O/8 O/32 O/128 O/256 O/1024 O/2048 O/4096 Internal clock sources
Figure 8-1. Block Diagram of PWM Timer
171
8.1.3 Input and Output Pins Table 8-1 lists the output pins of the PWM timer module. There are no input pins. Table 8-1. Output Pins of PWM Timer Module Name PWM0 output PWM1 output Abbreviation PW0 PW1 I/O Output Output Function Pulse output from PWM timer channel 0. Pulse output from PWM timer channel 1.
8.1.4 Register Configuration The PWM timer module has three registers for each channel as listed in Table 8-2. Table 8-2. PWM Timer Registers Initial value H'38 H'FF H'00 Address PWM0 H'FFA0 H'FFA1 H'FFA2
Name Timer control register Duty register Timer counter
Abbreviation TCR DTR TCNT
R/W R/W R/W R/(W)*
PWM1 H'FFA4 H'FFA5 H'FFA6
* The timer counters are read/write registers, but the write function is for test purposes only. Application programs should never write to these registers.
8.2 Register Descriptions
8.2.1 Timer Counter (TCNT) - H'FFA2 (PWM0), H'FFA6 (PWM1) Bit Initial value Read/Write 7 0 R/W 6 0 R/W 5 0 R/W 4 0 R/W 3 0 R/W 2 0 R/W 1 0 R/W 0 0 R/W
The PWM timer counters (TCNT) are 8-bit up-counters. When the output enable bit (OE) in the timer control register (TCR) is set to "1," the timer counter starts counting pulses of an internal clock source selected by clock select bits 2 to 0 (CKS2 to CKS0). After counting from H'00 to H'F9, the timer counter repeats from H'00.
172
The PWM timer counters can be read and written, but the write function is for test purposes only. Application software should never write to a PWM timer counter, because this may have unpredictable effects. The PWM timer counters are initialized to H'00 at a reset and in the standby modes, and when the OE bit is cleared to "0." 8.2.2 Duty Register (DTR) - H'FFA1 (PWM0), H'FFA5 (PWM1) Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3 1 R/W 2 1 R/W 1 1 R/W 0 1 R/W
The duty registers (DTR) are 8-bit readable/writable registers that specify the duty factor of the output pulse. Any duty factor from 0 to 100% can be selected, with a resolution of 1/250. Writing 0 (H'00) in a DTR gives a 0% duty factor; writing 125 (H'7D) gives a 50% duty factor; writing 250 (H'FA) gives a 100% duty factor. The timer count is continually compared with the DTR contents. If the DTR value is not 0, when the count increments from H'00 to H'01 the PWM output signal is set to "1." When the count increments past the DTR value, the PWM output returns to "0." If the DTR value is 0 (duty factor 0%), the PWM output remains constant at "0." The DTRs are double-buffered. A new value written in a DTR while the timer counter is running does not become valid until after the count changes from H'F9 to H'00. When the timer counter is stopped (while the OE bit is "0"), new values become valid as soon as written. When a DTR is read, the value read is the currently valid value. The DTRs are initialized to H'FF at a reset and in the standby modes. 8.2.3 Timer Control Register (TCR) - H'FFA0 (PWM0), H'FFA4 (PWM1) Bit Initial value Read/Write 7 OE 0 R/W 6 OS 0 R/W 5 -- 1 -- 4 -- 1 -- 3 -- 1 -- 2 CKS2 0 R/W 1 CKS1 0 R/W 0 CKS0 0 R/W
173
The TCRs are 8-bit readable/writable registers that select the clock source and control the PWM outputs. The TCRs are initialized to H'38 at a reset and in the standby modes. Bit 7 - Output Enable (OE): This bit enables the timer counter and the PWM output. Bit 7 OE 0 1
Description PWM output is disabled. TCNT is cleared to H'00 and stopped. PWM output is enabled. TCNT runs.
(Initial value)
Bit 6 - Output Select (OS): This bit selects positive or negative logic for the PWM output. Bit 6 OS 0 1
Description Positive logic; positive-going PWM pulse, "1" = High Negative logic; negative-going PWM pulse, "1" = Low
(Initial value)
Bits 5 to 3 - Reserved: These bits cannot be modified and are always read as "1." Bits 2, 1, and 0 - Clock Select (CKS2, CKS1, and CKS0): These bits select one of eight internal clock sources obtained by dividing the system clock (O). Bit 2 CKS2 0 0 0 0 1 1 1 1 Bit 1 CKS1 0 0 1 1 0 0 1 1 Bit 0 CKS0 0 1 0 1 0 1 0 1
Description O/2 O/8 O/32 O/128 O/256 O/1024 O/2048 O/4096
(Initial value)
From the clock source frequency, the resolution, period, and frequency of the PWM output can be calculated as follows.
174
Resolution = PWM period PWM frequency
1/clock source frequency = resolution x 250 = 1/PWM period
If the system clock frequency is 10MHz, then the resolution, period, and frequency of the PWM output for each clock source are given in Table 8-3. Table 8-3. PWM Timer Parameters for 10MHz System Clock Internal clock frequency O/2 O/8 O/32 O/128 O/256 O/1024 O/2048 O/4096 Resolution 200ns 800ns 3.2s 12.8s 25.6s 102.4s 204.8s 409.6s PWM period 50s 200s 800s 3.2ms 6.4ms 25.6ms 51.2ms 102.4ms PWM frequency 20kHz 5kHz 1.25kHz 312.5Hz 156.3Hz 39.1Hz 19.5Hz 9.8Hz
8.3 Operation
8.3.1 Timer Incrementation The PWM clock source is created from the system clock (O) by a prescaler. The timer counter increments on a TCNT clock pulse generated from the falling edge of the prescaler output as shown in Figure 8-2.
O
Prescaler output
TCNT clock pulse
TCNT
N-1
N
N+1
Figure 8-2. TCNT Increment Timing
175
O
8.3.2 PWM Operation
TCNT clock pulses
OE N-1 (b) H'01 H'02 H'F9 N N+1 (d) H'00 H'01
TCNT
(a) H'00
Figure 8-3 is a timing chart of the PWM operation.
176
(c) N M written in DTR (b) (c) PWM 1 cycle
DTR
H'FF
(d) M
N written in DTR
(a)*
(OS = "0")
PWM output
(OS = "1")
(e)*
* Used for port 4 input/output: state depends on values in data register and data direction register.
Figure 8-3. PWM Timing
(1) Positive Logic (OS = "0") When (OE = "0") - (a) in Figure 8-3: The timer count is held at H'00 and PWM output is inhibited. (Pin 46 (for PW0) or pin 47 (for PW1)is used for port 4 input/output, and its state depends on the corresponding port 4 data register and data direction register.) Any value (such as N in Figure 8-3) written in the DTR becomes valid immediately. y When (OE = "1") i) The timer counter begins incrementing. The PWM output goes High when TCNT changes from H'00 to H'01, unless DTR = H'00. [(b) in Figure 8-3] ii) When the count passes the DTR value, the PWM output goes Low. [(c) in Figure 8-3] iii) If the DTR value is changed (by writing the data "M" in Figure 8-3), the new value becomes valid after the timer count changes from H'F9 to H'00. [(d) in Figure 8-3] (2) Negative Logic (OS = "1") - (e) in Figure 8-3: The operation is the same except that High and Low are reversed in the PWM output . [(e) in Figure 8-3]
8.4 Application Notes
Some notes on the use of the PWM timer module are given below. (1) Any necessary changes to the clock select bits (CKS2 to CKS0) and output select bit (OS) should be made before the output enable bit (OE) is set to "1." (2) If the DTR value is H'00, the duty factor is 0% and PWM output remains constant at "0." If the DTR value is H'FA to H'FF, the duty factor is 100% and PWM output remains constant at "1." (For positive logic, "0" is Low and "1" is High. For negative logic, "0" is High and "1" is Low.) (3) When the DTR is read, the currently valid value is obtained. Due to the double buffering, this may not be the value most recently written. (4) Software should never write to a PWM timer counter. The write function is for test purposes only and may have unintended effects in normal operation.
177
Section 9. Serial Communication Interface
9.1 Overview
The H8/330 chip includes a single-channel serial communication interface (SCI) for transferring serial data to and from other chips. Either the synchronous or asynchronous communication mode can be selected. Communication control functions are provided by internal registers. 9.1.1 Features The features of the on-chip serial communication interface are: * Separate pins for asynchronous and synchronous modes - Asynchronous mode The SCI can communicate with a UART (Universal Asynchronous Receiver/Transmitter), ACIA (Asynchronous Communication Interface Adapter), or other chip that employs standard asynchronous serial communication. Eight data formats are available. - Data length: 7 or 8 bits - Stop bit length: 1 or 2 bits - Parity: Even, odd, or none - Error detection: Parity, overrun, and framing errors - Synchronous mode The SCI can communicate with chips able to perform clocked serial data transfer. - Data length: 8 bits - Error detection: Overrun errors * Full duplex communication The transmitting and receiving sections are independent, so the SCI can transmit and receive simultaneously. Both the transmit and receive sections use double buffering, so continuous data transfer is possible in either direction. * Built-in baud rate generator Any specified baud rate can be generated. * Internal or external clock source The baud rate generator can operate on an internal clock source, or an external clock signal input at the ASCK or CSCK pin. * Three interrupts Transmit-end, receive-end, and receive-error interrupts are requested independently.
179
9.1.2 Block Diagram
Bus interface BRR Baud rate generator Clock TXI RXI
Internal data bus
Module data bus
RDR
TDR
SSR SCR
ARxD/ CRxD ATxD/ CTxD
SMR RSR TSR Communication control Parity generate Parity check
Internal O O/4 clock O/16 O/64
ASCK/ CSCK RSR: RDR: TSR: TDR: SMR: SCR: SSR: BRR: Receive Shift Register (8 bits) Receive Data Register (8 bits) Transmit Shift Register (8 bits) Transmit Data Register (8 bits) Serial Mode Register (8 bits) Serial Control Register (8 bits) Serial Status Register (8 bits) Bit Rate Register (8 bits)
External clock source
ERI Interrupt signals
Figure 9-1. Block Diagram of Serial Communication Interface 9.1.3 Input and Output Pins Table 9-1 lists the input and output pins used by the SCI module. Table 9-1. SCI Input/Output Pins Name Asynchronous serial clock Asynchronous receive data Asynchronous transmit data Synchronous serial clock Synchronous receive data Synchronous transmit data Abbreviation ASCK ARxD ATxD CSCK CRxD CTxD I/O Input/output Input Output Input/output Input Output Function Serial clock input and output. Receive data input. Transmit data output. Serial clock input and output. Receive data input. Transmit data output.
180
9.1.4 Register Configuration Table 9-2 lists the SCI registers. Table 9-2. SCI Registers Name Receive shift register Receive data register Transmit shift register Transmit data register Serial mode register Serial control register Serial status register Bit rate register Abbreviation RSR RDR TSR TDR SMR SCR SSR BRR R/W -- R -- R/W R/W R/W R/(W)* R/W Initial value -- H'00 -- H'FF H'04 H'0C H'87 H'FF Address -- H'FFDD -- H'FFDB H'FFD8 H'FFDA H'FFDC H'FFD9
Notes: * Software can write a "0" to clear the status flag bits, but cannot write a "1."
9.2 Register Descriptions
9.2.1 Receive Shift Register (RSR) Bit Read/Write 7 -- 6 -- 5 -- 4 -- 3 -- 2 -- 1 -- 0 --
The RSR receives incoming data bits. When one data character (1 byte) has been received, it is transferred to the receive data register (RDR). The CPU cannot read or write the RSR directly.
181
9.2.2 Receive Data Register (RDR) - H'FFDD Bit Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R 2 0 R 1 0 R 0 0 R
The RDR stores received data. As each character is received, it is transferred from the RSR to the RDR, enabling the RSR to receive the next character. This double-buffering allows the SCI to receive data continuously. The CPU can read but not write the RDR. The RDR is initialized to H'00 at a reset and in the standby modes. 9.2.3 Transmit Shift Register (TSR) Bit Read/Write 7 -- 6 -- 5 -- 4 -- 3 -- 2 -- 1 -- 0 --
The TSR holds the character currently being transmitted. When transmission of this character is completed, the next character is moved from the transmit data register (TDR) to the TSR and transmission of that character begins. If the CPU has not written the next character in the TDR, no data are transmitted. The CPU cannot read or write the TSR directly. 9.2.4 Transmit Data Register (TDR) - H'FFDB Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3 1 R/W 2 1 R/W 1 1 R/W 0 1 R/W
The TDR is an 8-bit readable/writable register that holds the next character to be transmitted. When the TSR becomes empty, the character written in the TDR is transferred to the TSR. Continuous data transmission is possible by writing the next byte in the TDR while the current byte is being transmitted from the TSR.
182
The TDR is initialized to H'FF at a reset and in the standby modes. 9.2.5 Serial Mode Register (SMR) - H'FFD8 Bit Initial value Read/Write 7 C/A 0 R/W 6 CHR 0 R/W 5 PE 0 R/W 4 O/E 0 R/W 3 STOP 0 R/W 2 -- 1 -- 1 CKS1 0 R/W 0 CKS0 0 R/W
The SMR is an 8-bit readable/writable register that controls the communication format and selects the clock rate for the internal clock source. It is initialized to H'04 at a reset and in the standby modes. Bit 7 - Communication Mode (C/A): This bit selects the asynchronous or synchronous communication mode. Bit 7 C/A 0 1
Description Asynchronous communication. Clock-synchronized communication.
(Initial value)
Bit 6 - Character Length (CHR): This bit selects the character length in asynchronous mode. It is ignored in synchronous mode. Bit 6 CHR Description 0 8 Bits per character. 1 7 Bits per character.
(Initial value)
Bit 5 - Parity Enable (PE): This bit selects whether to add a parity bit in asynchronous mode. It is ignored in synchronous mode. Bit 5 PE Description 0 Transmit: No parity bit is added. Receive: Parity is not checked. 1 Transmit: A parity bit is added. Receive: Parity is checked.
(Initial value)
183
Bit 4 - Parity Mode (O/E ): In asynchronous mode, when parity is enabled (PE = "1"), this bit selects even or odd parity. Even parity means that a parity bit is added to the data bits for each character to make the total number of 1's even. Odd parity means that the total number of 1's is made odd. This bit is ignored when PE = "0," and in the synchronous mode. Bit 4 O/E Description 0 Even parity. 1 Odd parity.
(Initial value)
Bit 3 - Stop Bit Length (STOP): This bit selects the number of stop bits. It is ignored in the synchronous mode. Bit 3 STOP 0 1
Description 1 Stop bit. 2 Stop bits.
(Initial value)
Bit 2 - Reserved: This bit cannot be modified and is always read as "1." Bits 1 and 0 - Clock Select 1 and 0 (CKS1 and CKS0): These bits select the internal clock source when the baud rate generator is clocked from within the H8/330 chip. Bit 1 CKS1 0 0 1 1 Bit 0 CKS0 0 1 0 1
Description O clock O/4 clock O/16 clock O/64 clock
(Initial value)
For further information about SMR settings, see Tables 9-5 to 9-7 in Section 9.3, "Operation."
184
9.2.6 Serial Control Register (SCR) - H'FFDA Bit Initial value Read/Write 7 TIE 0 R/W 6 RIE 0 R/W 5 TE 0 R/W 4 RE 0 R/W 3 -- 1 -- 2 -- 1 -- 1 CKE1 0 R/W 0 CKE0 0 R/W
The SCR is an 8-bit readable/writable register that enables or disables various SCI functions. It is initialized to H'0C at a reset and in the standby modes. Bit 7 - Transmit Interrupt Enable (TIE): This bit enables or disables the transmit-end interrupt (TxI) requested when the transmit data register empty (TDRE) bit in the serial status register (SSR) is set to "1." Bit 7 TIE 0 1
Description The transmit-end interrupt request (TxI) is disabled. The transmit-end interrupt request (TxI) is enabled.
(Initial value)
Bit 6 - Receive Interrupt Enable (RIE): This bit enables or disables the receive-end interrupt (RxI) requested when the receive data register full (RDRF) bit in the serial status register (SSR) is set to "1." Bit 6 RIE 0 1
Description The receive-end interrupt (RxI) request is disabled. The receive-end interrupt (RxI) request is enabled.
(Initial value)
Bit 5 - Transmit Enable (TE): This bit enables or disables the transmit function. When the transmit function is enabled, the ATxD or CTxD pin is automatically used for output. When the transmit function is disabled, the ATxD or CTxD pin can be used as a general-purpose I/O port. Bit 5 TE Description 0 The transmit function is disabled. The ATxD and CTxD pins can be used for general-purpose I/O. 1 The transmit function is enabled. When C/A = 0, the ATxD pin is used for output. When C/A = 1, the CTxD pin is used for output.
(Initial value)
185
Bit 4 - Receive Enable (RE): This bit enables or disables the receive function. When the receive function is enabled, the ARxD or CRxD pin is automatically used for input. When the receive function is disabled, the ARxD or CRxD pin is available as a general-purpose I/O port. Bit 4 RE Description 0 The receive function is disabled. The ARxD and CRxD pins can be used for general-purpose I/O. 1 The receive function is enabled. When C/A = 0, the ARxD pin is used for input. When C/A = 1, the CRxD pin is used for input.
(Initial value)
Bits 3 and 2 - Reserved: These bits cannot be modified and are always read as "1." Bit 1 - Clock Enable 1 (CKE1): This bit selects the internal or external clock source for the baud rate generator. When the external clock source is selected, the ASCK or CSCK pin is automatically used for input of the external clock signal. Bit 1 CKE1 0 1
Description Internal clock source. (When C/A = 1, the CSCK pin is used for output.) External clock source. (When C/A = 1, the CSCK pin is used for input. When C/A = 0, the ASCK pin is used for input.)
(Initial value)
Bit 0 - Clock Enable 0 (CKE0): When an internal clock source is used in asynchronous mode, this bit enables or disables serial clock output at the ASCK pin. This bit is ignored when the external clock is selected, or when the synchronous mode is selected. Bit 0 CKE0 0 1
Description The ASCK pin is not used by the SCI (and is available as a general-purpose I/O port). The ASCK pin is used for serial clock output.
(Initial value)
For further information on clock source selection, see Table 9-6 in Section 9.3, "Operation."
186
9.2.7 Serial Status Register (SSR) - H'FFDC Bit Initial value Read/Write 7 6 5 4 3 TDRE RDRF ORER FER PER 1 0 0 0 0 R/(W)* R/(W)* R/(W)* R/(W)* R/(W)* 2 -- 1 -- 1 -- 1 -- 0 -- 1 --
* Software can write a "0" to clear the flags, but cannot write a "1" in these bits. The SSR is an 8-bit register that indicates transmit and receive status. It is initialized to H'87 at a reset and in the standby modes. Bit 7 - Transmit Data Register Empty (TDRE): This bit indicates when the TDR contents have been transferred to the TSR and the next character can safely be written in the TDR. Bit 7 TDRE 0 1
Description To clear TDRE, the CPU must read TDRE after it has been set to "1," then write a "0" in this bit. This bit is set to 1 at the following times: (Initial value) (1) When TDR contents are transferred to the TSR. (2) When the TE bit in the SCR is cleared to "0."
Bit 6 - Receive Data Register Full (RDRF): This bit indicates when one character has been received and transferred to the RDR. Bit 6 RDRF 0 1
Description To clear RDRF, the CPU must read RDRF after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when one character is received without error and transferred from the RSR to the RDR.
(Initial value)
187
Bit 5 - Overrun Error (ORER): This bit indicates an overrun error during reception. Bit 5 ORER 0 1
Description To clear ORER, the CPU must read ORER after it has been set to "1," then write a "0" in this bit. This bit is set to 1 if reception of the next character ends while the receive data register is still full (RDRF = "1").
(Initial value)
Bit 4 - Framing Error (FER): This bit indicates a framing error during data reception in the asynchronous mode. It has no meaning in the synchronous mode. Bit 4 FER 0 1
Description To clear FER, the CPU must read FER after it has been set to "1," then write a "0" in this bit. This bit is set to 1 if a framing error occurs (stop bit = "0").
(Initial value)
Bit 3 - Parity Error (PER): This bit indicates a parity error during data reception in the asynchronous mode, when a communication format with parity bits is used. This bit has no meaning in the synchronous mode, or when a communication format without parity bits is used. Bit 3 PER 0 1
Description To clear PER, the CPU must read PER after it has been set to "1," then write a "0" in this bit. This bit is set to 1 when a parity error occurs (the parity of the received data does not match the parity selected by the O/E bit in the SMR).
(Initial value)
Bits 2 to 0 - Reserved: These bits cannot be modified and are always read as "1."
188
9.2.8 Bit Rate Register (BRR) - H'FFD9 Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3 1 R/W 2 1 R/W 1 1 R/W 0 1 R/W
The BRR is an 8-bit register that, together with the CKS1 and CKS0 bits in the SMR, determines the baud rate output by the baud rate generator. The BRR is initialized to H'FF (the slowest rate) at a reset and in the standby modes. Tables 9-3 and 9-4 show examples of BRR (N) and CKS (n) settings for commonly used bit rates. Table 9-3. Examples of BRR Settings in Asynchronous Mode (1) XTAL Frequency (MHz) 2.4576 4 Error N (%) n N 86 +0.31 1 141 255 0 1 103 127 0 0 207 63 0 0 103 31 0 0 51 15 0 0 25 7 0 0 12 3 0 -- -- 1 0 -- -- ---- 0 1 0 0 -- --
2 Bit rate 110 150 300 600 1200 2400 4800 9600 19200 31250 38400 n 1 0 0 0 0 0 -- -- -- -- -- Error N (%) 70 +0.03 207 +0.16 103 +0.16 51 +0.16 25 +0.16 12 +0.16 ---- ---- ---- ---- ---- n 1 0 0 0 0 0 0 0 0 -- 0
Error (%) +0.03 +0.16 +0.16 +0.16 +0.16 +0.16 +0.16 -- -- 0 --
n 1 1 0 0 0 0 0 -- -- -- --
4.194304 Error N (%) 148 -0.04 108 +0.21 217 +0.21 108 +0.21 54 -0.70 26 +1.14 13 -2.48 -- -- -- -- -- -- -- --
189
Table 9-3. Examples of BRR Settings in Asynchronous Mode (2) XTAL Frequency (MHz) 6 7.3728 Error N (%) n N 52 +0.50 2 64 155 +0.16 1 191 77 +0.16 1 95 155 +0.16 0 191 77 +0.16 0 95 38 +0.16 0 47 19 -2.34 0 23 ---- 0 11 ---- 0 5 2 0 -- -- ---- 0 2
Bit rate 110 150 300 600 1200 2400 4800 9600 19200 31250 38400
n 1 1 0 0 0 0 0 0 0 -- 0
4.9152 Error N (%) 174 -0.26 127 0 255 0 127 0 63 0 31 0 15 0 7 0 3 0 ---- 1 0
8 Error (%) +0.70 0 0 0 0 0 0 0 0 -- 0 n 2 1 1 0 0 0 0 0 -- 0 -- N 70 207 103 207 103 51 25 12 -- 3 -- Error (%) +0.03 +0.16 +0.16 +0.16 +0.16 +0.16 +0.16 +0.16 -- 0 --
n 2 1 1 0 0 0 0 -- -- 0 --
Table 9-3. Examples of BRR Settings in Asynchronous Mode (3) XTAL Frequency (MHz) 10 12 Error N (%) n N 88 -0.25 2 106 64 +0.16 2 77 129 +0.16 1 155 64 +0.16 1 77 129 +0.16 0 155 64 +0.16 0 77 32 -1.36 0 38 15 +1.73 0 19 7 +1.73 -- -- 4 0 0 5 3 +1.73 -- --
Bit rate 110 150 300 600 1200 2400 4800 9600 19200 31250 38400
n 2 1 1 0 0 0 0 0 0 0 0
9.8304 Error N (%) 86 +0.31 255 0 127 0 255 0 127 0 63 0 31 0 15 0 7 0 4 -1.70 3 0
12.288 Error (%) -0.44 0 0 0 +0.16 +0.16 +0.16 -2.34 -- 0 -- n 2 2 1 1 0 0 0 0 0 0 -- N 108 79 159 79 159 79 39 19 4 5 -- Error (%) +0.08 0 0 0 0 0 0 0 0 +2.40 --
n 2 2 1 1 0 0 0 0 0 0 0
190
Table 9-3. Examples of BRR Settings in Asynchronous Mode (4) XTAL Frequency (MHz) 16 19.6608 Error Error N (%) n N (%) 141 +0.03 2 174 -0.26 103 +0.16 2 127 0 207 +0.16 1 255 0 103 +0.16 1 127 0 207 +0.16 0 255 0 103 +0.16 0 127 0 51 +0.16 0 63 0 25 +0.16 0 31 0 12 +0.16 0 15 0 7 0 0 9 -1.70 ---- 0 7 0
Bit rate 110 150 300 600 1200 2400 4800 9600 19200 31250 38400
n 2 2 1 1 0 0 0 0 0 -- 0
14.7456 Error N (%) 130 -0.07 95 0 191 0 95 0 191 0 95 0 47 0 23 0 11 0 ---- 5 0
20 n 3 2 2 1 1 0 0 0 0 0 0 N 43 129 64 129 64 129 64 32 15 9 7 Error (%) +0.88 +0.16 +0.16 +0.16 +0.16 +0.16 +0.16 -1.36 +1.73 0 +1.73
n 2 2 1 1 0 0 0 0 0 0 --
Note: If possible, the error should be within 1%. B = OSC x 106/[64 x 22n x (N + 1)] N: BRR value (0 N 255) OSC: Crystal oscillator frequency in MHz B: Bit rate (bits/second) n: Internal clock source (0, 1, 2, or 3) The meaning of n is given by the table below: n 0 1 2 3 CKS1 0 0 1 1 CKS0 0 1 0 1 Clock O O/4 O/16 O/64
191
Table 9-4. Examples of BRR Settings in Synchronous Mode XTAL Frequency (MHz) 8 10 N n N n -- -- -- -- 124 2 249 -- 249 2 124 -- 124 1 249 -- 199 1 99 1 99 0 199 0 49 0 99 0 19 0 39 0 9 0 19 0 4 0 9 -- 1 0 3 0 0* 0 1 -- 0 0* --
Bit rate 100 250 500 1k 2.5k 5k 10k 25k 50k 100k 250k 500k 1M 2.5M
2 n -- 1 1 0 0 0 0 0 0 -- 0
N -- 249 124 249 99 49 24 9 4 -- 0*
4 n -- 2 1 1 0 0 0 0 0 0 0 0
N -- -- -- -- 124 249 124 49 24 -- 4 -- --
16 n -- 3 2 2 1 1 0 0 0 0 0 0 0
N -- 124 249 124 199 99 199 79 39 19 7 3 1
20 n -- -- -- -- 1 1 0 0 0 0 0 0 -- 0
N -- -- -- -- 249 124 249 99 49 24 9 4 -- 0*
Notes: Blank: No setting is available. --: A setting is available, but the bit rate is inaccurate. *: Continuous transfer is not possible. B = OSC x 106/[8 x 22n x (N + 1)] N: BRR value (0 N 255) OSC: Crystal oscillator frequency in MHz B: Bit rate (bits per second) n: Internal clock source (0, 1, 2, or 3) The meaning of n is given by the table below: n 0 1 2 3 CKS1 0 0 1 1 CKS0 0 1 0 1 Clock O O/4 O/16 O/64
192
9.3 Operation
9.3.1 Overview The SCI supports serial data transfer in both asynchronous and synchronous modes. The communication format depends on settings in the SMR as indicated in Table 9-5. The clock source and usage of the ASCK and CSCK pins depend on settings in the SMR and SCR as indicated in Table 9-6. Table 9-5. Communication Formats Used by SCI SMR CHR 0 Stop bit length 1 2 1 2 1 2 1 2 --
C/A 0
PE 0 1
1
0 1
1
--
--
STOP Mode 0 1 0 1 Asynchronous 0 1 0 1 -- Synchronous
Format 8-Bit data
Parity None Yes None
7-Bit data Yes 8-Bit data --
Table 9-6. SCI Clock Source Selection SMR C/A 0 (Async mode) SCR CKE1 0 Clock source ASCK pin Internal Input/output port* Serial clock output at bit rate External Serial clock input at 16 x bit rate Internal Input/output port* External Input/output port*
CKE0 0 1 0 1 0 1 0 1
CSCK pin Input/output port* Input/output port* Input/output port* Serial clock output Serial clock input
1 1 (Sync mode) 0 1
* Not used by the SCI.
193
Transmitting and receiving operations in the two modes are described next. 9.3.2 Asynchronous Mode In asynchronous mode, each character is individually synchronized by framing it with a start bit and stop bit. Full duplex data transfer is possible because the SCI has independent transmit and receive sections. Double buffering in both sections enables the SCI to be programmed for continuous data transfer. Figure 9-2 shows the general format of one character sent or received in the asynchronous mode. The communication channel is normally held in the mark state (High). Character transmission or reception starts with a transition to the space state (Low). The first bit transmitted or received is the start bit (Low). It is followed by the data bits, in which the least significant bit (LSB) comes first. The data bits are followed by the parity bit, if present, then the stop bit or bits (High) confirming the end of the frame. In receiving, the SCI synchronizes on the falling edge of the start bit, and samples each bit at the center of the bit (at the 8th cycle of the internal serial clock, which runs at 16 times the bit rate).
Idle state Start bit D0 D1 Dn Parity bit Stop bit
1 bit
7 or 8 bits
0 or 1 bit
1 or 2 bits
One character
Figure 9-2. Data Format in Asynchronous Mode (1) Data Format: Table 9-7 lists the data formats that can be sent and received in asynchronous mode. Eight formats can be selected by bits in the SMR.
194
Table 9-7. Data Formats in Asynchronous Mode SMR bits CHR PE 0 0 0 0 0 1 0 1 1 0 1 0 1 1 1 1
STOP 0 1 0 1 0 1 0 1
Data format START START START START START START START START
8-Bit data 8-Bit data 8-Bit data 8-Bit data 7-Bit data 7-Bit data 7-Bit data 7-Bit data
STOP STOP P P STOP STOP P P STOP STOP STOP
STOP STOP STOP STOP
STOP
Note START: Start bit STOP: Stop bit P: Parity bit (2) Clock: In the asynchronous mode it is possible to select either an internal clock created by the on-chip baud rate generator, or an external clock input at the ASCK pin. Refer to Table 9-6. If an external clock is input at the ASCK pin, its frequency should be 16 times the desired baud rate. If the internal clock provided by the on-chip baud rate generator is selected and the ASCK pin is used for clock output, the output clock frequency is equal to the baud rate, and the clock pulse rises at the center of the transmit data bits. Figure 9-3 shows the phase relationship between the output clock and transmit data.
Output clock
......
......
Transmit data
Start bit
D1
D2
D3
Figure 9-3. Phase Relationship Between Clock Output and Transmit Data
195
......
(3) Data Transmission and Reception * SCI Initialization: Before data can be transmitted or received, the SCI must be initialized by software. To initialize the SCI, software must clear the TE and RE bits to "0," then execute the following procedure. Write the value corresponding to the desired bit rate in the BRR. (This step is not necessary if an external clock is used.) Select the desired communication parameters in the SCR. Leave bit 0 (CKE0) cleared to zero. Select clocked synchronous mode in the SMR. Set the TE and/or RE bit in the SCR to "1." The TE and RE bits must both be cleared to "0" whenever the operating mode or data format is changed. After changing the operating mode or data format, before setting the TE and RE bits to "1" software must wait for at least the transfer time for 1 bit at the selected baud rate, to make sure the SCI is initialized. If an external clock is used, the clock must not be stopped. When clearing the TDRE bit during data transmission, to assure transfer of the correct data, do not clear the TDRE bit until after writing data in the TDR. Similarly, in receiving data, do not clear the RDRF bit until after reading data from the RDR. * Data Transmission: The procedure for transmitting data is as follows. Set up the desired transmitting conditions in the SMR, SCR, and BRR. Set the TE bit in the SCR to "1." The ATxD pin will automatically be switched to output and one frame* of all 1's will be transmitted, after which the SCI is ready to transmit data. Check that the TDRE bit is set to "1," then write the first byte of transmit data in the TDR. Next clear the TDRE bit to "0."
196
The first byte of transmit data is transferred from the TDR to the TSR and sent in the designated format as follows. i) Start bit (one "0" bit). ii) Transmit data (seven or eight bits, starting from bit 0) iii) Parity bit (odd or even parity bit, or no parity bit) iv) Stop bit (one or two consecutive "1" bits) Transfer of the transmit data from the TDR to the TSR makes the TDR empty, so the TDRE bit is set to "1." If the TIE bit is set to "1," a transmit-end interrupt (TxI) is requested. When the transmit function is enabled but the TDR is empty (TDRE = "1"), the output at the ATxD pin is held at "1" until the TDRE bit is cleared to "0." * A frame is the data for one character, including the start bit and stop bit(s). * Data Reception: The procedure for receiving data is as follows. Set up the desired receiving conditions in the SMR, SCR, and BRR. Set the RE bit in the SCR to "1." The ARxD pin is automatically be switched to input and the SCI is ready to receive data. The SCI synchronizes with the incoming data by detecting the start bit, and places the received bits in the RSR. At the end of the data, the SCI checks that the stop bit is "1." When a complete frame has been received, the SCI transfers the received data from the RSR to the RDR so that it can be read. If the character length is 7 bits, the most significant bit of the RDR is cleared to "0." At the same time, the SCI sets the RDRF bit in the SSR to "1." If the RIE bit is set to "1," a receive-end interrupt (RxI) is requested. The RDRF bit is cleared to "0" when software reads the SSR, then writes a "0" in the RDRF bit. The RDR is then ready to receive the next character from the RSR. When a frame is not received correctly, a receive error occurs. There are three types of receive errors, listed in Table 9-8.
197
If a receive error occurs, the RDRF bit in the SSR is not set to "1." (For an overrun error, RDRF is already set to "1.") The corresponding error flag is set to "1" instead. If the RIE bit in the SCR is set to "1," a receive-error interrupt (ERI) is requested. When a framing or parity error occurs, the RSR contents are transferred to the RDR. If an overrun error occurs, however, the RSR contents are not transferred to the RDR. If multiple receive errors occur simultaneously, all the corresponding error flags are set to "1." To clear a receive-error flag (ORER, FER, or PER), software must read the SSR and then write a "0" in the flag bit. Table 9-8. Receive Errors Name Overrun error Abbreviation ORER Description Reception of the next frame ends while the RDRF bit is still set to "1." The RSR contents are not transferred to the RDR. A stop bit is "0." The RSR contents are transferred to the RDR. The parity of a frame does not match the value selected by the O/E bit in the SMR. The RSR contents are transferred to the RDR.
Framing error Parity error
FER PER
9.3.3 Synchronous Mode The synchronous mode is suited for high-speed, continuous data transfer. Each bit of data is synchronized with a serial clock pulse at the CSCK pin. Continuous data transfer is enabled by the double buffering employed in both the transmit and receive sections of the SCI. Full duplex communication is possible because the transmit and receive sections are independent. (1) Data Format: Figure 9-4 shows the communication format used in the synchronous mode. The data length is 8 bits for both the transmit and receive directions. The least significant bit (LSB) is sent and received first. Each bit of transmit data is output from the falling edge of the serial clock pulse to the next falling edge. Received bits are latched on the rising edge of the serial clock pulse.
198
Transmission direction
Serial clock
Data
Bit 0 Don't-care
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7 Don't-care
Serial clock
Data
8-Bit data
8-Bit data
Figure 9-4. Data Format in Synchronous Mode (2) Clock: Either the internal serial clock created by the on-chip baud rate generator or an external clock input at the CSCK pin can be selected in the synchronous mode. See Table 9-6 for details. (3) Data Transmission and Reception * SCI Initialization: Before data can be transmitted or received, the SCI must be initialized by software. To initialize the SCI, software must clear the TE and RE bits to "0" to disable both the transmit and receive functions, then execute the following procedure. Write the value corresponding to the desired bit rate in the BRR. (This step is not necessary if an external clock is used.) Select the clock and enable desired interrupts in the SCR. Leave bit 0 (CKE0) cleared to "0." Select the synchronous mode in the SMR. Set the TE and/or RE bit in the SCR to "1." The TE and RE bits must both be cleared to "0" whenever the operating mode or data format is changed. After changing the operating mode or data format, before setting the TE and RE bits to "1" software must wait for at least 1 bit transfer time at the selected communication speed, to make sure the SCI is initialized.
199
When clearing the TDRE bit during data transmission, to assure correct data transfer, do not clear the TDRE bit until after writing data in the TDR. Similarly, in receiving data, do not clear the RDRF bit until after reading data from the RDR. * Data Transmission: The procedure for transmitting data is as follows. Set up the desired transmitting conditions in the SMR, BRR, and SCR. Set the TE bit in the SCR to "1." The CTxD pin will automatically be switched to output, after which the SCI is ready to transmit data. Check that the TDRE bit is set to "1," then write the first byte of transmit data in the TDR. Next clear the TDRE bit to "0." The first byte of transmit data is transferred from the TDR to the TSR and sent, each bit synchronized with a clock pulse. Bit 0 is sent first. Transfer of the transmit data from the TDR to the TSR makes the TDR empty, so the TDRE bit is set to "1." If the TIE bit is set to "1," a transmit-end interrupt (TxI) is requested. The TDR and TSR function as a double buffer. Continuous data transmission can be achieved by writing the next transmit data in the TDR and clearing the TDRE bit to "0" while the SCI is transmitting the current data from the TSR. If an internal clock source is selected, after transferring the transmit data from the TDR to the TSR, while transmitting the data from the TSR the SCI also outputs a serial clock signal at the CSCK pin. When all data bits in the TSR have been transmitted, if the TDR is empty (TDRE = "1"), serial clock output is suspended until the next data byte is written in the TDR and the TDRE bit is cleared to "0." During this interval the CTxD pin continues to output the value of the last bit of the previous data. If the external clock source is selected, data transmission is synchronized with the clock signal input at the CSCK pin. When all data bits in the TSR have been transmitted, if the TDR is empty (TDRE = "1") but external clock pulses continue to arrive, the CTxD pin outputs the value of last bit of the previous data. * Data Reception: The procedure for receiving data is as follows.
200
Set up the desired receiving conditions in the SMR, BRR, and SCR. Set the RE bit in the SCR to "1." The CRxD pin is automatically be switched to input and the SCI is ready to receive data. Incoming data bits are latched in the RSR on eight clock pulses. When 8 bits of data have been received, the SCI sets the RDRF bit in the SSR to "1." If the RIE bit is set to "1," a receive-end interrupt (RxI) is requested. The SCI transfers the received data byte from the RSR to the RDR so that it can be read. The RDRF bit is cleared when software reads the RDRF bit in the SSR, then writes a "0" in the RDRF bit. The RDR and RSR function as a double buffer. Data can be received continuously by reading each byte of data from the RDR and clearing the RDRF bit to "0" before the last bit of the next byte is received. In general, an external clock source should be used for receiving data. If an internal clock source is selected, the SCI starts receiving data as soon as the RE bit is set to "1." The serial clock is also output at the CSCK pin. The SCI continues receiving until the RE bit is cleared to "0." If the last bit of the next data byte is received while the RDRF bit is still set to "1," an overrun error occurs and the ORER bit is set to "1." If the RIE bit is set to "1," a receive-error interrupt (ERI) is requested. The data received in the RSR are not transferred to the RDR when an overrun error occurs. After an overrun error, reception of the next data is enabled when the ORER bit is cleared to "0." * Simultaneous Transmit and Receive: The procedure for transmitting and receiving simultaneously is as follows: Set up the desired communication conditions in the SMR, BRR, and SCR. Set the TE and RE bits in the SCR to "1." The CTxD and CRxD pins are automatically switched to output and input, respectively, and the SCI is ready to transmit and receive data.
201
Data transmitting and receiving start when the TDRE bit in the SSR is cleared to "0." Data are sent and received in synchronization with eight clock pulses. First, the transmit data are transferred from the TDR to the TSR. This makes the TDR empty, so the TDRE bit is set to "1." If the TIE bit is set to "1," a transmit-end interrupt (TxI) is requested. If continuous data transmission is desired, software must read the TDRE bit in the SSR, write the next transmit data in the TDR, then clear the TDRE bit to "0." If the TDRE bit is not cleared to "0" by the time the SCI finishes sending the current byte from the TSR, the CTxD pin continues to output the value of last bit of the previous data. In the receiving section, when 8 bits of data have been received they are transferred from the RSR to the RDR and the RDRF bit in the SSR is set to "1." If the RIE bit is set to "1," a receive-end interrupt (RxI) is requested. To clear the RDRF bit software should read the RDRF bit in the SSR, read the data in the RDR, then write a "0" in the RDRF bit. For continuous data reception, software should read the RDRF bit in the SSR, read the data in the RDR, then clear the RDRF bit to "0." If the last bit of the next byte is received while the RDRF bit is still set to "1," an overrun error occurs. The error is handled as described under "Data Reception" above. The overrun error does not affect the transmit section of the SCI, which continues to transmit normally.
9.4 Interrupts
The SCI can request three types of interrupts: transmit-end (TxI), receive-end (RxI), and receiveerror (ERI). Interrupt requests are enabled or disabled by the TIE and RIE bits in the SCR. Independent signals are sent to the interrupt controller for each type of interrupt. The transmit-end and receive-end interrupt request signals are obtained from the TDRE and RDRF flags. The receive-error interrupt request signal is the logical OR of the three error flags: overrun error (ORER), framing error (FER), and parity error (PER). Table 9-9 lists information about these interrupts.
202
Table 9-9. SCI Interrupts Interrupt ERI RxI TxI Description Receive-error interrupt, requested when ORER, FER, or PER is set. RIE must also be set. Receive-end interrupt, requested when RDRF and RIE are set. Transmit-end interrupt, requested when TDRE and TIE are set. Priority High
Low
Figure 9-5 shows the timing of the RxI interrupt signal. The timing of TxI and ERI is similar.
O Internal ReceiveEnd signal RDRF
RxI
Figure 9-5. Timing of Interrupt Signal
9.5 Application Notes
Application programmers should note the following features of the SCI.
Figure 9-5
(1) TDR Write: The TDRE bit in the SSR is simply a flag that indicates that the TDR contents have been transferred to the TSR. The TDR contents can be rewritten regardless of the TDRE value. If a new byte is written in the TDR while the TDRE bit is "0," before the old TDR contents have been moved into the TSR, the old byte will be lost. Normally, software should check that the TDRE bit is set to "1" before writing to the TDR. (2) Multiple Receive Errors: Table 9-10 lists the values of flag bits in the SSR when multiple receive errors occur, and indicates whether the RSR contents are transferred to the RDR.
203
Table 9-10. SSR Bit States and Data Transfer When Multiple Receive Errors Occur SSR Bits ORER 1 0 0 1 1 0 1
Receive error Overrun error Framing error Parity error Overrun + framing errors Overrun + parity errors Framing + parity errors Overrun + framing + parity errors
RDRF 1*1 0 0 1*1 1*1 0 1*1
FER 0 1 0 1 0 1 1
PER 0 0 1 0 1 1 1
RSR RDR*2 No Yes Yes No No Yes No
*1 Set to "1" before the overrun error occurs. *2 Yes: The RSR contents are transferred to the RDR. No: The RSR contents are not transferred to the RDR. (3) Line Break Detection: When the ARxD pin receives a continuous stream of 0's in the asynchronous mode (line-break state), a framing error occurs because the SCI detects a "0" stop bit. The value H'00 is transferred from the RSR to the RDR. Software can detect the line-break state as a framing error accompanied by H'00 data in the RDR. The SCI continues to receive data, so if the FER bit is cleared to "0" another framing error will occur. (4) Sampling Timing and Receive Margin in Asynchronous Mode: The serial clock used by the SCI in asynchronous mode runs at 16 times the baud rate. The falling edge of the start bit is detected by sampling the ARxD input on the falling edge of this clock. After the start bit is detected, each bit of receive data in the frame (including the start bit, parity bit, and stop bit or bits) is sampled on the rising edge of the serial clock pulse at the center of the bit. See Figure 9-6. It follows that the receive margin can be calculated as in equation (1). When the absolute frequency deviation of the clock signal is 0 and the clock duty factor is 0.5, data can theoretically be received with distortion up to the margin given by equation (2). This is a theoretical limit, however. In practice, system designers should allow a margin of 20% to 30%.
204
0 1 2 3 4 5 6 7 8 9 10 11121314 1516 1 2 3 4 5 6 7 8 9 10 11 12131415 16 1 2 3 4 5 Basic clock -7.5 pulses Receive data Start bit +7.5 pulses D0 D1
Sync sampling
Data sampling
Figure 9-6. Sampling Timing (Asynchronous Mode) M = {(0.5 - 1/2N) - (D - 0.5)/N - (L - 0.5)F} x 100 [%] M: N: D: L: F: Receive margin Ratio of basic clock to baud rate (N=16) Duty factor of clock--ratio of High pulse width to Low width (0.5 to 1.0) Frame length (9 to 12) Absolute clock frequency deviation (1)
When D = 0.5 and F= 0 M = (0.5 -1/2 x 16) x 100 [%] = 46.875% (2)
205
Section 10. A/D Converter
10.1 Overview
The H8/330 chip includes an analog-to-digital converter module with eight input channels. A/D conversion is performed by the successive approximations method with 8-bit resolution. 10.1.1 Features The features of the on-chip A/D module are: * Eight analog input channels * 8-bit resolution * Rapid conversion Conversion time is 12.2s per channel (minimum) with a 10MHz system clock * External triggering can be selected * Single and scan modes - Single mode: A/D conversion is performed once. - Scan mode: A/D conversion is performed in a repeated cycle on one to four channels. * Four 8-bit data registers These registers store A/D conversion results for up to four channels. * A CPU interrupt (ADI) can be requested at the completion of each A/D conversion cycle.
207
10.1.2 Block Diagram
Bus interface
Module data bus
Internal data bus
AVCC
Successive approximations register
8 Bit D/A
AVSS
A D D R A
A D D R B
A D D R C
A D D R D
A D C S R
A D C R
AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7 Analog multiplexer + - Control circuit Comparator O/8 O/16
Sample and hold circuit ADI
ADTRG
ADCR: ADCSR: ADDRA: ADDRB: ADDRC: ADDRD: A/D Control Register (8 bits) A/D Control/Status Register (8 bits) A/D Data Register A (8 bits) A/D Data Register B (8 bits) A/D Data Register C (8 bits) A/D Data Register D (8 bits)
Interrupt signal
Figure 10-1. Block Diagram of A/D Converter
208
10.1.3 Input Pins Table 10-1 lists the input pins used by the A/D converter module. The eight analog input pins are divided into two groups, consisting of analog inputs 0 to 3 (AN0 to AN3) and analog inputs 4 to 7 (AN4 to AN7), respectively. Table 10-1. A/D Input Pins Name Analog supply voltage Analog ground Analog input 0 Analog input 1 Analog input 2 Analog input 3 Analog input 4 Analog input 5 Analog input 6 Analog input 7 A/D external trigger Abbreviation AVCC AVSS AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7 ADTRG I/O Input Input Input Input Input Input Input Input Input Input Input Analog input pins, group 0 Function Power supply and reference voltage for the analog circuits. Ground and reference voltage for the analog circuits.
Analog input pins, group 1
External trigger for starting A/D conversion
10.1.4 Register Configuration Table 10-2 lists the registers of the A/D converter module. Table 10-2. A/D Registers Name A/D data register A A/D data register B A/D data register C A/D data register D A/D control/status register A/D control register Abbreviation ADDRA ADDRB ADDRC ADDRD ADCSR ADCR R/W R R R R R/(W)* R/W Initial value H'00 H'00 H'00 H'00 H'00 H'7F Address H'FFE0 H'FFE2 H'FFE4 H'FFE6 H'FFE8 H'FFEA
* Software can write a "0" to clear bit 7, but cannot write a "1" in this bit.
209
10.2 Register Descriptions
10.2.1 A/D Data Registers (ADDR) - H'FFE0 to H'FFE6 Bit ADDRn Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R 2 0 R 1 0 R 0 0 R (n = A to D)
The four A/D data registers (ADDRA to ADDRD) are 8-bit read-only registers that store the results of A/D conversion. Each data register is assigned to two analog input channels as indicated in Table 10-3. The A/D data registers are always readable by the CPU. The A/D data registers are initialized to H'00 at a reset and in the standby modes. Table 10-3. Assignment of Data Registers to Analog Input Channels Analog input channel Group 0 Group 1 A/D data register AN0 AN4 ADDRA AN1 AN5 ADDRB AN2 AN6 ADDRC AN3 AN7 ADDRD 10.2.2 A/D Control/Status Register (ADCSR) - H'FFE8 Bit Initial value Read/Write 7 ADF 0 R/(W)* 6 ADIE 0 R/W 5 ADST 0 R/W 4 SCAN 0 R/W 3 CKS 0 R/W 2 CH2 0 R/W 1 CH1 0 R/W 0 CH0 0 R/W
* Software can write a "0" in bit 7 to clear the flag, but cannot write a "1" in this bit. The A/D control/status register (ADCSR) is an 8-bit readable/writable register that controls the operation of the A/D converter module.
210
The ADCSR is initialized to H'00 at a reset and in the standby modes. Bit 7 - A/D End Flag (ADF): This status flag indicates the end of one cycle of A/D conversion. Bit 7 ADF 0 1
Description To clear ADF, the CPU must read ADF after it has been set to "1," then write a "0" in this bit. This bit is set to 1 at the following times: (1) Single mode: when one A/D conversion is completed. (2) Scan mode: when inputs on all selected channels have been converted.
(Initial value)
Bit 6 - A/D Interrupt Enable (ADIE): This bit selects whether to request an A/D interrupt (ADI) when A/D conversion is completed. Bit 6 ADIE 0 1
Description The A/D interrupt request (ADI) is disabled. The A/D interrupt request (ADI) is enabled.
(Initial value)
Bit 5 - A/D Start (ADST): The A/D converter operates while this bit is set to "1." In the single mode, this bit is automatically cleared to "0" at the end of each A/D conversion. Bit 5 ADST 0 1
Description A/D conversion is halted. (Initial value) (1) Single mode: One A/D conversion is performed. The ADST bit is automatically cleared to "0" at the end of the conversion. (2) Scan mode: A/D conversion starts and continues cyclically on the selected channels until the ADST bit is cleared to "0" by software (or a reset, or by entry to a standby mode).
211
Bit 4 - Scan Mode (SCAN): This bit selects the scan mode or single mode of operation. See Section 10.3, "Operation" for descriptions of these modes. The mode should be changed only when the ADST bit is cleared to "0." Bit 4 SCAN 0 1
Description Single mode Scan mode
(Initial value)
Bit 3 - Clock Select (CKS): This bit controls the A/D conversion time. The conversion time should be changed only when the ADST bit is cleared to "0." Bit 3 CKS 0 1
Description Conversion time = 242 states (max.) Conversion time = 122 states (max.)
(Initial value)
Bits 2 to 0 - Channel Select 2 to 0 (CH2 to CH0): These bits and the SCAN bit combine to select one or more analog input channels. The channel selection should be changed only when the ADST bit is cleared to "0." Group select CH2 0 Channel select CH1 CH0 0 0 0 1 1 0 1 1 0 0 0 1 1 0 1 1 Selected channels Single mode AN0 (Initial value) AN1 AN2 AN3 AN4 AN5 AN6 AN7
1
Scan mode AN0 AN0, AN1 AN0 to AN2 AN0 to AN3 AN4 AN4, AN5 AN4 to AN6 AN4 to AN7
212
10.2.3 A/D Control Register (ADCR) - H'FFEA Bit Initial value Read/Write 7 TRGE 0 R/W 6 -- 1 -- 5 -- 1 -- 4 -- 1 -- 3 -- 1 -- 2 -- 1 -- 1 -- 1 -- 0 -- 1 --
The A/D control register (ADCR) is an 8-bit readable/writable register that enables or disables the A/D external trigger signal. The ADCR is initialized to H'7F at a reset and in the standby modes. Bit 7 - Trigger Enable (TRGE): This bit enables the ADTRG (A/D external trigger) signal to set the ADST bit and start A/D conversion. Bit 7 TRGE 0 1
Description A/D external trigger is disabled. ADTRG does not set the ADST bit. A/D external trigger is enabled. ADTRG sets the ADST bit. (The ADST bit can also be set by software.)
(Initial value)
Bits 6 to 0 - Reserved: These bits cannot be modified and are always read as "1."
10.3 Operation
The A/D converter performs 8 successive approximations to obtain a result ranging from H'00 (corresponding to AVSS) to H'FF (corresponding to AVCC). Figure 10-2 shows the response of the A/D converter.
213
H'FF
H'00 AVss AVcc
Figure 10-2. The Response of the A/D Converter The A/D converter module can be programmed to operate in single mode or scan mode as explained below. 10.3.1 Single Mode (SCAN = 0) The single mode is suitable for obtaining a single data value from a single channel. A/D conversion starts when the ADST bit is set to "1," either by software or by a High-to-Low transition of the ADTRG signal (if enabled). During the conversion process the ADST bit remains set to "1." When conversion is completed, the ADST bit is automatically cleared to "0." When the conversion is completed, the ADF bit is set to "1." If the interrupt enable bit (ADIE) is also set to "1," an A/D conversion end interrupt (ADI) is requested, so that the converted data can be processed by an interrupt-handling routine. The ADF bit is cleared when software reads the A/D control/status register (ADCSR), then writes a "0" in this bit. Before selecting the single mode, clock, and analog input channel, software should clear the ADST bit to "0" to make sure the A/D converter is stopped. Changing the mode, clock, or channel selection while A/D conversion is in progress can lead to conversion errors. A/D conversion begins when the ADST bit is set to "1" again. The same instruction can be used to alter the mode and channel selection and set ADST to "1."
214
The following example explains the A/D conversion process in single mode when channel 1 (AN1) is selected and the external trigger is disabled. Figure 10-3 shows the corresponding timing chart. (1) Software clears the ADST bit to "0," then selects the single mode (SCAN = "0") and channel 1 (CH2 to CH0 = "001"), enables the A/D interrupt request (ADIE = "1"), and sets the ADST bit to "1" to start A/D conversion. Coding Example: (when using the slow clock, CKS = "0") BCLR #5, @H'FFE8 ;Clear ADST MOV.B #H'7F, ROL MOV.B ROL, @H'FFEA ;Disable external trigger MOV.B #H'61, ROL MOV.B ROL, @H'FFE8 ;Select mode and channel and set ADST to "1" Value set in ADCSR: ADF 0 ADIE 1 ADST 1 SCAN 0 CKS 0 CH2 0 CH1 0 CH0 1
(2) The A/D converter converts the voltage level at the the AN1 input pin to a digital value. At the end of the conversion process the A/D converter transfers the result to register ADDRB, sets the ADF bit is set to "1," clears the ADST bit to "0," and halts. (3) ADF = "1" and ADIE = "1," so an A/D interrupt is requested. (4) The user-coded A/D interrupt-handling routine is started. (5) The interrupt-handling routine reads the ADCSR value, then writes a "0" in the ADF bit to clear this bit to "0." (6) The interrupt-handling routine reads and processes the A/D conversion result. (7) The routine ends. Steps (2) to (7) can now be repeated by setting the ADST bit to "1" again.
215
Interrupt (ADI)
Set*
ADIE A/D conversion starts Set* ADST Clear*
Set*
Clear*
ADF
Channel 0 (AN 0)
Waiting
Channel 1 (AN 1)
Waiting
A/D conversion
Waiting
A/D conversion
Waiting
Channel 2 (AN 2)
Waiting
Channel 3 (AN 3)
Waiting
ADDRA
Read result A/D conversion result
Read result A/D conversion result
ADDRB
ADDRC
ADDRD
*
indicates execution of a software instruction
Figure 10-3. A/D Operation in Single Mode (When Channel 1 is Selected)
10.3.2 Scan Mode (SCAN = 1) The scan mode can be used to monitor analog inputs on one or more channels. When the ADST bit is set to "1," either by software or by a High-to-Low transition of the ADTRG signal (if enabled), A/D conversion starts from the first channel selected by the CH bits. When CH2 = "0" the first channel is AN0. When CH2 = "1" the first channel is AN4. If the scan group includes more than one channel (i.e. if bit CH1 or CH0 is set), conversion of the next channel begins as soon as conversion of the first channel ends. Conversion of the selected channels continues cyclically until the ADST bit is cleared to "0." The conversion results are placed in the data registers corresponding to the selected channels. The A/D data registers are readable by the CPU. Before selecting the scan mode, clock, and analog input channels, software should clear the ADST bit to "0" to make sure the A/D converter is stopped. Changing the mode, clock, or channel selection while A/D conversion is in progress can lead to conversion errors. A/D conversion begins when the ADST bit is set to "1" again. The same instruction can be used to alter the mode and channel selection and set ADST to "1." The following example explains the A/D conversion process when three channels in group 0 are selected (AN0, AN1, and AN2) and the external trigger is disabled. Figure 10-4 shows the corresponding timing chart. (1) Software clears the ADST bit to "0," then selects the scan mode (SCAN = "1"), scan group 0 (CH2 = "0"), and analog input channels AN0 to AN2 (CH1 and CH0 = "0") and sets the ADST bit to "1" to start A/D conversion. Coding Example: (with slow clock and ADI interrupt enabled) BCLR #5, @H'FFE8 ;Clear ADST MOV.B #H'7F, ROL MOV.B ROL, @H'FFEA ;Disable external trigger MOV.B #H'72, ROL MOV.B ROL, @H'FFE8 ;Select mode and channels and set ADST to "1" Value set in ADCSR ADF 0 ADIE 1 ADST 1 SCAN 1 CKS 0 CH2 0 CH1 1 CH0 0
217
(2) The A/D converter converts the voltage level at the AN0 input pin to a digital value, and transfers the result to register ADDRA. (3) Next the A/D converter converts AN1 and transfers the result to ADDRB. Then it converts AN2 and transfers the result to ADDRC. (4) After all selected channels (AN0 to AN2) have been converted, the AD converter sets the ADF bit to "1." If the ADIE bit is set to "1," an A/D interrupt (ADI) is requested. Then the A/D converter begins converting AN0 again. (5) Steps (2) to (4) are repeated cyclically as long as the ADST bit remains set to "1." To stop the A/D converter, software must clear the ADST bit to "0." Regardless of which channel is being converted when the ADST bit is cleared to "0," when the ADST bit is set to "1" again, conversion begins from the the first selected channel (AN0 or AN4).
218
Continuous A/D conversion Set *
1
Clear * 1
ADST Clear * 1
ADF
A/D conversion time Waiting A/D conversion Waiting Waiting A/D conversion Waiting A/D conver- * 2 sion Waiting
Channel 0 (AN 0)
Channel 1 (AN 1)
A/D conversion Waiting A/D conversion Waiting Transfer
Waiting
Channel 2 (AN 2)
Waiting
Channel 3 (AN 3)
ADDRA
A/D conversion result
A/D conversion result
ADDRB
A/D conversion result
ADDRC
A/D conversion result
ADDRD
*1
indicates execution of a software instruction
*2 Data undergoing conversion when ADST bit is cleared are ignored.
Figure 10-4. A/D Operation in Scan Mode (When Channels 0 to 2 are Selected)
Note: If the ADST bit is cleared to "0" when two or more channels are selected in the scan mode, incorrect values may be left in the A/D data registers. For this reason, in the scan mode the A/D data registers should be read while the ADST bit is still set to "1." Example: The following coding example sets up a four-channel A/D scan, and shows the first part of an ADI interrupt handler for reading the converted data. Note that the data are read before the ADST bit is cleared. MOV.B MOV.B BSET #5B R0L #5 , R0L , @ADCSR ; Four-channel scan mode , @ADCSR ; Start conversion (set ADST)
(Conversion of four channels) ADI: MOV.B MOV.B MOV.B MOV.B BCLR BCLR @ADDRA @ADDRB @ADDRC @ADDRD #5 #7 , , , , , , R1 R2 R3 R4 @ADCSR @ADCSR ; Read ADDRA ; Read ADDRB ; Read ADDRC ; Read ADDRD ; Clear ADST ; Clear ADF
(It is not necessary to clear the ADST bit in order to read ADDRA to ADDRD.) 10.3.3 Input Sampling Time and A/D Conversion Time The A/D converter includes a built-in sample-and-hold circuit. Sampling of the input starts at a time tD after the ADST bit is set to "1." The sampling process lasts for a time tSPL. The actual A/D conversion begins after sampling is completed. Figure 10-5 shows the timing of these steps. Table 10-4 (a) lists the conversion times for the single mode. Table 10-4 (b) lists the conversion times for the scan mode. The total conversion time (tCONV) includes tD and tSPL. The purpose of tD is to synchronize the ADCSR write time with the A/D conversion process, so the length of tD is variable. The total conversion time therefore varies within the minimum to maximum ranges indicated in table 10-4 (a) and (b).
220
In the scan mode, the ranges given in table 10-4 (b) apply to the first conversion. The length of the second and subsequent conversion processes is fixed at 256 states (when CKS = "0") or 128 states (when CKS = "1").
(1)
O
Internal address bus
(2)
Write signal
Input sampling timing
ADF
tD
tSPL t CONV
(Notation) (1) (2) ADCSR write cycle ADCSR address Synchronization delay Input sampling time Total A/D conversion time
tD tSPL tCONV
Figure 10-5. A/D Conversion Timing
221
Table 10-4 (a). A/D Conversion Time (Single Mode) CKS = "0" min typ max 18 -- 33 -- 63 -- 227 -- 242 CKS = "1" min typ 10 -- -- 31 115 --
Item Synchronization delay Input sampling time Total A/D conversion time
Symbol tD tSPL tCONV
max 17 -- 122
Table 10-4 (b). A/D Conversion Time (Scan Mode) CKS = "0" min typ max 18 -- 33 -- 63 -- 259 -- 274 CKS = "1" min typ 10 -- -- 31 131 --
Item Synchronization delay Input sampling time Total A/D conversion time
Symbol tD tSPL tCONV
max 17 -- 138
Note: Values in the tables above are numbers of states. 10.3.4 External Trigger Input Timing A/D conversion can be started by external trigger input at the ADTRG pin. This input is enabled or disabled by the TRGE bit in the A/D control register (ADCR). If the TRGE bit is set to "1," when a falling edge of ADTRG is detected the ADST bit is set to "1" and A/D conversion begins. Subsequent operation is the same as when the ADST bit is set to "1" by software. Figure 10-6 shows the trigger timing.
O
ADTRG
Internal trigger signal
ADST A/D conversion
Figure 10-6. External Trigger Input Timing
222
10.4 Interrupts
The A/D conversion module generates an A/D-end interrupt request (ADI) at the end of A/D conversion. The ADI interrupt request can be enabled or disabled by the ADIE bit in the A/D control/status register (ADCSR).
223
Section 11. Dual-Port RAM (Parallel Communication Interface)
11.1 Overview
The H8/330 has an on-chip dual-port RAM (DPRAM) that can be accessed by both the CPU on the H8/330 chip and a master CPU on another chip. The dual-port RAM can be used only in the single-chip mode (mode 3), and only when the DPME bit in the system control register (SYSCR) is set to "1." The dual-port-RAM-enabled mode is called slave mode because it is designed for a master-slave system in which the dual-port RAM provides a parallel communication interface with a master CPU. In this section the CPU on the H8/330 chip will be referred to as the H8/300 CPU. 11.1.1 Features * 15-Byte capacity Fifteen 8-bit parallel communication data registers * Standard external memory interface The master CPU can be connected to the dual-port RAM in the same way as to a memory chip. * Simple data-transfer protocol * Can generate master CPU interrupts
225
11.1.2 Block Diagram Figure 11-1 shows a block diagram of the dual-port RAM.
Internal data bus Bus interface Module data bus
MREI
MWEI
P C C S R
P C D R 0 A
P C D R 0 B
P C D R 1
to
P C D R 14
CS OE WE RDY
Bus interface
DDB7 to DDB0
RS3 to RS0
PCCSR: Parallel Communication Control/Status Register PCDR0: Parallel Communication Data Register 0 PCDR1 to 14 : Paralle Communication Data Register 1 to 14
Figure 11-1. Block Diagram of Dual-Port RAM
226
11.1.3 Input and Output Pins Table 11-1 lists the input and output pins of the dual-port RAM. Table 11-1. Dual-Port RAM Input and Output Pins Name DPRAM data bus Abbreviation DDB7 to DDB0 I/O Function Input/output An 8-bit parallel data bus by which the master CPU can access the dual-port RAM. Input Chip select input pin for selecting the dual-port RAM. Input Dual-port RAM address input. Input Enables output on the DPRAM data bus. Input Enables data to be written in the dual-port RAM via the DPRAM data bus. Output * Indicates that the dual-port RAM is ready to be written or read by the master CPU. (NMOS open-drain output)
Chip select Register select Output enable Write enable Ready
CS RS3 to RS0 OE WE RDY
* NMOS open drain output. 11.1.4 Register Configuration Table 11-2 lists the registers of the dual-port RAM. Table 11-2. Dual-Port RAM Register Configuration Read/write H8/300 Master Initial On-chip External address Name Abbr. CPU CPU value address RS3 RS2 RS1 RS0 Parallel communication PCCSR R/(W)* R/(W)* H'00 H'FFF0 0 0 0 0 control/status register Parallel communication PCDR0A R W Undeter- H'FFF1 0 0 0 1 data register 0 PCDR0B W R mined H'FFF1 0 0 0 1 Parallel communication PCDR1 R/W R/W Undeter- H'FFF2 0 0 1 0 data register 1 mined Parallel communication PCDR2 R/W R/W Undeter- H'FFF3 0 0 1 1 data register 2 mined Parallel communication PCDR3 R/W R/W Undeter- H'FFF4 0 1 0 0 data register 3 mined
227
Table 11-2. Dual-Port RAM Register Configuration (cont.) Read/write H8/300 Master Initial On-chip External address Abbr. CPU CPU value address RS3 RS2 RS1 RS0 PCDR4 R/W R/W Undeter- H'FFF5 0 1 0 1 mined PCDR5 R/W R/W Undeter- H'FFF6 0 1 1 0 mined PCDR6 R/W R/W Undeter- H'FFF7 0 1 1 1 mined PCDR7 R/W R/W Undeter- H'FFF8 1 0 0 0 mined PCDR8 R/W R/W Undeter- H'FFF9 1 0 0 1 mined PCDR9 R/W R/W Undeter- H'FFFA 1 0 1 0 mined PCDR10 R/W R/W Undeter- H'FFFB 1 0 1 1 mined PCDR11 R/W R/W Undeter- H'FFFC 1 1 0 0 mined PCDR12 R/W R/W Undeter- H'FFFD 1 1 0 1 mined PCDR13 R/W R/W Undeter- H'FFFE 1 1 1 0 mined PCDR14 R/W R/W Undeter- H'FFFF 1 1 1 1 mined
Name Parallel communication data register 4 Parallel communication data register 5 Parallel communication data register 6 Parallel communication data register 7 Parallel communication data register 8 Parallel communication data register 9 Parallel communication data register 10 Parallel communication data register 11 Parallel communication data register 12 Parallel communication data register 13 Parallel communication data register 14
Note: The H8/300 CPU can write only bits 6, 4, and 2 of the PCCSR. The master CPU can write only bit 4.
11.2 Register Descriptions
11.2.1 Dual Port RAM Enable Bit (DPME) The dual-port RAM is enabled or disabled by the DPRAM Enable (DPME) bit in the system control register (SYSCR). In the extended modes the dual-port RAM is always disabled. In the single-chip mode, the dual-port RAM is initially disabled but can be enabled by setting the DPME bit to "1."
228
System Control Register (SYSCR)--H'FFC4 Bit Initial value Read/Write 7 SSBY 0 R/W 6 STS2 0 R/W 5 STS1 0 R/W 4 STS0 0 R/W 3 -- 1 -- 2 1 NMIEG DPME 0 0 R/W R/W 0 RAME 1 R/W
The only bit in the system control register that concerns the dual-port RAM is the DPME bit. See section 2.4.2, "System Control Register" for the other bits. Bit 1 - Dual-Port RAM Enable (DPME): This bit enables or disables the dual-port RAM. The dual-port RAM can be enabled only in the single-chip mode (mode 3). Bit 1 DPME 0 1
Description The dual-port RAM is disabled. The dual-port RAM is enabled (in single-chip mode only).
(Initial value)
If the DPME bit is set to "1" while the H8/330 is operating in the single-chip mode, the following pins are automatically assigned to dual-port RAM functions, regardless of their data direction register settings: Port 3 (P37 to P30) Port 8 (P83 to P80) In port 9, P97 P95 P94 P93 DDB7 to DDB0 (parallel communication data bus; input/output) RS3 to RS0 (dual-port RAM register select; input) WE (Write Enable; input) RDY (Ready; output) OE (Output Enable; input) CS (Chip Select; input)
The DPME bit is initialized to "0" by a reset and in the hardware standby mode. Setting the DPME bit to "1" in the expanded modes (modes 1 and 2) has no effect.
229
11.2.2 Parallel Communication Data Register 0 (PCDR0) - H'FFF1 (a) Parallel Communication Data Register 0A (PCDR0A) Bit Initial value
R/W H8/300 CPU Master CPU
7 -- R W
6 -- R W
5 -- R W
4 -- R W
3 -- R W
2 -- R W
1 -- R W
0 -- R W
(b) Parallel Communication Data Register 0B (PCDR0B) Bit Initial value
R/W H8/300 CPU Master CPU
7 -- W R
6 -- W R
5 -- W R
4 -- W R
3 -- W R
2 -- W R
1 -- W R
0 -- W R
Parallel communication data register 0 consists of two separate 8-bit registers with the same address. As shown in Figure 11-2, PCDR0A is written by the H8/300 CPU and read by the master CPU; PCDR0B is written by the master CPU and read by the H8/300 CPU. This arrangement prevents contention even if both CPUs write to PCDR0 at the same time. When either CPU reads PCDR0, it is assured of reading data written by the other CPU.
Internal data bus Read Write
H8/300 CPU
PCDR0A
PCDR0B
Write
Read
PCDR 0
External data bus
Master CPU
Figure 11-2. Parallel Communication Data Register 0
230
The value in PCDR0 after a reset is undetermined. In non-slave modes, the value obtained by reading PCDR0 is unpredictable. 11.2.3 Parallel Communication Data Registers 1 to 14 - H'FFF2 (PCDR1) to H'FFFF (PCDR1-14) Bit Initial value 7 6 -- R/W R/W 5 -- R/W R/W 4 -- R/W R/W 3 -- R/W R/W 2 -- R/W R/W 1 -- R/W R/W 0 -- R/W R/W
-- R/W H8/300 CPU R/W Master CPU R/W
Parallel communication data registers 1 to 14 are 8-bit registers which can be written and read by either the H8/300 CPU or the master CPU. The H8/300 CPU can read and write these registers regardless of the operating mode of the H8/330 chip. The master CPU can read and write them only when the H8/330 chip is operating in slave mode. In non-slave modes, these registers can be used as 14 bytes of data memory. Note that access requires three states per byte, which is slower than the on-chip RAM. The values in PCDR1 to PCDR14 after a reset are undetermined. 11.2.4 Parallel Communication Control/Status Register (PCCSR) - H'FFF0 Bit 7 MWEF Initial value 0 R/W H8/300 CPU R Master CPU R 6 EMWI 0 R/W R 5 4 3 SWEF EAKAR MREF 0 0 0 R R/W R R R/W R 2 EMRI 0 R/W R 1 0 MWMF SWMF 0 0 R R R R
The PCCSR is an 8-bit readable and partly writable register that provides protocol and interrupt control functions. Either CPU can read and write bit 4, which enables the RDY signal. The H8/300 CPU can read and write bits 6, 4 and 2, which enable interrupts. The other bits are readonly bits. The PCCSR is initialized to H'00 at a reset and in the standby modes.
231
In the bit names that follow, the H8/300 is referred to as the slave and the master CPU as the master. Bit 7 - Master Write End Flag (MWEF): This flag bit is used to indicate that the master CPU has finished writing data in the parallel communication data registers. It is set when the master CPU writes to PCDR14 and cleared when the H8/300 CPU reads PCDR14. Bit 7 MWEF 0 1
Description The H8/300 CPU has read PCDR14 while the dual-port RAM was in the master write mode (MWMF = "1"). The master CPU has written data in PCDR14.
(Initial state)
Bit 6 - Enable Master Write Interrupt (EMWI): This bit enables or disables the master write end interrupt (MWEI). Bit 6 EMWI 0 1
Description The master write end interrupt request (MWEI) is disabled. The master write end interrupt request (MWEI) is enabled.
(Initial state)
Bit 5 - Slave Write End Flag (SWEF): This flag bit is used to indicate that the H8/300 CPU has finished writing data in the parallel communication data registers. It is set when the H8/300 CPU writes to PCDR14 and cleared when the master CPU reads PCDR14. Bit 5 SWEF 0 1
Description The master CPU has read PCDR14. The H8/300 CPU has written data in PCDR14.
(Initial state)
Bit 4 - Enable Acknowledge and Request (EAKAR): This bit enables or disables the RDY signal output by the H8/330 chip. If enabled: * The RDY signal goes Low when the H8/300 CPU reads PCDR0 while the dual-port RAM is in the master write mode (MWMF = "1"), or when the H8/300 CPU writes to PCDR14. * The RDY signal goes High when the master CPU reads PCDR14 or the PCCSR, or when either the master or H8/300 CPU writes to PCDR0. In the non-slave modes this bit has no effect.
232
Bit 4 EAKAR 0 1
Description RDY output is disabled. RDY remains in the high-impedance state. RDY output is enabled.
(Initial state)
Bit 3 - Master Read End Flag (MREF): This flag indicates whether the master CPU has finished reading data set in the parallel communication data registers. Bit 3 MREF 0
1
Description This bit is cleared to "0" when: * The H8/300 CPU reads or writes PCDR0. * The master CPU writes to PCDR0. This bit is set to "1" when the master CPU reads PCDR0.
(Initial state)
Bit 2 - Enable Master Read Interrupt (EMRI): This bit enables or disables the master read end interrupt (MREI). Bit 2 EMRI 0 1
Description The master read end interrupt request (MREI) is disabled. The master read end interrupt request (MREI) is enabled.
(Initial state)
Bit 1 - Master Write Mode Flag (MWMF): This bit indicates when the dual-port RAM is in the master write mode. The master CPU should check that this bit is set to "1" before writing to parallel communication data registers 1 to 14. The H8/300 CPU cannot write in those registers while this bit is set to "1." Bit 1 MWMF 0
1
Description This bit is cleared to "0" when the H8/300 CPU reads PCDR0. The dual-port RAM is not in the master write mode. The master CPU should avoid writing in PCDR1 to PCDR14. This bit is set to "1" if the master CPU writes to PCDR0 while the SWMF flag is cleared to "0." The dual-port RAM is in the master write mode. Only the master CPU can write in PCDR1 to PCDR14.
(Initial state)
233
Bit 0 - Slave Write Mode Flag (SWMF): This bit indicates when the dual-port RAM is in the slave write mode. The H8/300 CPU should check that this bit is set to "1" before writing to parallel communication data registers 1 to 14. The master CPU cannot write in those registers while this bit is set to "1." Bit 0 SWMF 0
1
Description This bit is cleared to "0" when the master CPU reads PCDR0. (Initial state) The dual-port RAM is not in the slave write mode. The H8/300 CPU should avoid writing in PCDR1 to PCDR14. This bit is set to "1" if the H8/300 CPU writes to PCDR0 while the MWMF flag is cleared to "0." The dual-port RAM is in the slave write mode. Only the H8/300 CPU can write in PCDR1 to PCDR14.
11.3 Usage
The dual-port RAM has a simple protocol for controlling the use of the data registers and parallel communication data bus. The basic rule is that when either CPU writes to the dual-port RAM, it should write to PCDR0 first and PCDR14 last. Conversely, in reading the dual-port RAM, the CPU should read PCDR14 first and PCDR0 last. Procedures for data transfer in both directions are given below. Figure 11-3 shows a timing chart. 11.3.1 Data Transfer from Master CPU to H8/300 CPU The following procedure should be used when the master CPU sends data to the H8/300 CPU via the dual-port RAM: (1) The master CPU writes the first byte of data in PCDR0. If the dual-port RAM is not currently in the slave write mode, MWMF is set to "1," placing it in the master write mode and preventing the H8/300 CPU from writing in PCDR1 to PCDR14. (2) The master CPU reads the PCCSR and checks MWMF. If MWMF is set to "1," the master CPU may continue writing in PCDR1 to PCDR14. If MWMF is cleared to "0," the dual-port RAM is presumably in the slave write mode. (3) The master CPU writes data in PCDR1 to PCDR13 as required, then writes the last byte in PCDR14. This sets the master write end flag (MWEF) to "1," notifying the H8/300 CPU that the master CPU has finished writing. If EMWI is set to "1," a master write end interrupt is requested.
234
(4) After the master CPU has finished writing data, the H8/300 CPU first reads PCDR14. This clears the master write end flag. Then the H8/300 CPU reads data from PCDR1 to PCDR13 as required. Finally, the H8/300 CPU reads PCDR0. This clears MWMF, so the dual-port RAM is no longer in the master write mode. If the EAKAR bit is set to "1," the RDY signal goes Low to acknowledge the received data. (5) If the master CPU has more data to send, it should check that MWMF is cleared to "0," then repeat the above procedure from step (1). If MWMF is still set to "1," that indicates that the H8/300 CPU has not read all the data sent previously. 11.3.2 Data Transfer from H8/300 CPU to Master CPU The following procedure should be used when the H8/300 CPU sends data to the master CPU via the dual-port RAM: (1) The H8/300 CPU writes the first byte of data in PCDR0. If the dual-port RAM is not currently in the master write mode, SWMF is set to "1," placing it in the slave write mode and preventing the master CPU from writing in PCDR1 to PCDR14. (2) The H8/300 CPU reads the PCCSR and checks SWMF. If SWMF is set to "1," the H8/300 CPU may continue writing in PCDR1 to PCDR14. If SWMF is cleared to "0," the dual-port RAM is presumably in the master write mode. (3) The H8/300 CPU writes data in PCDR1 to PCDR13 as required, then writes the last byte in PCDR14. This sets the slave write end flag (SWEF) to "1." If the EAKAR bit is set to "1," the RDY signal goes Low to notify the master CPU that the H8/300 CPU has finished writing. (4) After the H8/300 CPU has finished writing data, the master CPU first reads PCDR14. This clears the slave write end flag. Then the master CPU reads data from PCDR1 to PCDR13 as required. Finally, the master CPU reads PCDR0. This clears the SWMF bit, so the dual-port RAM is no longer in the slave write mode. It also sets the master read end flag (MREF). If EMRI is set to "1," a master read end interrupt is requested to notify the H8/300 CPU that the master CPU has finished reading the data. (5) If the H8/300 CPU has more data to send, it should check that SWMF is cleared to "0," then repeat the above procedure from step (1). If SWMF is still set to "1," that indicates that the master CPU has not read all the data sent previously.
235
Slave receive mode H8/300 CPU Master CPU SWMF MWMF MREF MWEF SWEF (RDY)
Write PCDR0 Read PCCSR Write PCDR14 Read PCDR14 Read PCDR0 Write PCDR0 Read PCCSR Write PCDR14 Read PCDR14 Read PCDR0
Slave transmit mode H8/300 CPU Master CPU SWMF MWMF
Write PCDR0 Read PCCSR Write PCDR14 Write PCDR0 Read PCCSR Write PCDR14
Read PCDR14
Read PCDR0
Read PCDR14
Read PCDR0
MREF MWEF
SWEF (RDY)
Figure 11-3. Dual-Port RAM Timing Chart
11.4 Master-Slave Interconnections
Figure 11-4 shows an example of the master-slave interconnections when the master chip is an H8/532.
A15 - A4
Decoder
CS
A3 - A0
Address bus
RS3 - RS0
D7 - D0 WR RD IRQ
Data bus
DDB7 - DDB0
WE OE RDY
H8/532
H8/330
Note: An external pull-up resistor should be connected to the RDY output pin.
Figure 11-4. Interconnection to H8/532 (Example)
237
Section 12. RAM
12.1 Overview
The H8/330 includes 512 bytes of on-chip static RAM, connected to the CPU by a 16-bit data bus. Both byte and word access to the on-chip RAM are performed in two states, enabling rapid data transfer and instruction execution. The on-chip RAM is assigned to addresses H'FD80 to H'FF7F in the chip's address space. The RAME bit in the system control register (SYSCR) can enable or disable the on-chip RAM, permitting these addresses to be allocated to external memory instead, if so desired.
12.2 Block Diagram
Figure 12-1 is a block diagram of the on-chip RAM.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Address H'FD80 H'FD82 H'FD80 H'FD82 H'FD81 H'FD83
On-chip RAM H'FF7E H'FF7E Even address H'FF7F Odd address
Figure 12-1. Block Diagram of On-Chip RAM
12.3 RAM Enable Bit (RAME)
The on-chip RAM is enabled or disabled by the RAME (RAM Enable) bit in the system control register (SYSCR). Table 12-1 lists information about the system control register.
239
Table 12-1. System Control Register Name System control register Bit Initial value Read/Write 7 SSBY 0 R/W Abbreviation SYSCR 6 STS2 0 R/W 5 STS1 0 R/W R/W R/W 4 STS0 0 R/W Initial value H'09 3 -- 1 -- Address H'FFC4 0 RAME 1 R/W
2 1 NMIEG DPME 0 0 R/W R/W
The only bit in the system control register that concerns the on-chip RAM is the RAME bit. See section 2.4.2, "System Control Register" for the other bits. Bit 0 - RAM Enable (RAME): This bit enables or disables the on-chip RAM. The RAME bit is initialized to "1" on the rising edge of the RES signal, so a reset enables the onchip RAM. The RAME bit is not initialized in the software standby mode. Bit 7 RAME 0 1
Description On-chip RAM is disabled. On-chip RAM is enabled.
(Initial value)
12.4 Operation
12.4.1 Expanded Modes (Modes 1 and 2) If the RAME bit is set to "1," accesses to addresses H'FD80 to H'FF7F are directed to the on-chip RAM. If the RAME bit is cleared to "0," accesses to addresses H'FD80 to H'FF7F are directed to the external data bus. 12.4.2 Single-Chip Mode (Mode 3) If the RAME bit is set to "1," accesses to addresses H'FD80 to H'FF7F are directed to the on-chip RAM. If the RAME bit is cleared to "0," the on-chip RAM data cannot be accessed. Attempted write access has no effect. Attempted read access always results in H'FF data being read.
240
Section 13. ROM
13.1 Overview
The H8/330 includes 16K bytes of high-speed, on-chip ROM. The on-chip ROM is connected to the CPU via a 16-bit data bus. Both byte data and word data are accessed in two states, enabling rapid data transfer and instruction fetching. The H8/330 is available in two versions: one with electrically programmable ROM (PROM); the other with masked ROM. The PROM version has a PROM mode in which the chip can be programmed with a standard PROM writer. The on-chip ROM is enabled or disabled depending on the MCU operating mode, which is determined by the inputs at the mode pins (MD1 and MD0) when the chip comes out of the reset state. See table 13-1. Table 13-1. On-Chip ROM Usage in Each MCU Mode Mode pins MD1 MD0 0 1 1 0 1 1
Mode Mode 1 (expanded mode) Mode 2 (expanded mode) Mode 3 (single-chip mode)
On-chip ROM Disabled (external addresses) Enabled Enabled
241
13.1.1 Block Diagram Figure 13-1 is a block diagram of the on-chip ROM.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'0000 H'0002
H'0001 H'0003
On-chip ROM H'3FFE Even addresses H'3FFF Odd addresses
Figure 13-1. Block Diagram of On-Chip ROM
13.2 PROM Mode
13.2.1 PROM Mode Setup In the PROM mode of the PROM version of the H8/330, the usual microcomputer functions are halted to allow the on-chip PROM to be programmed. The programming method is the same as for the HN27C256. To select the PROM mode, apply the signal inputs listed in Table 13-2. Table 13-2. Selection of PROM Mode Pin Mode pin MD1 Mode pin MD0 STBY pin Pins P80 and P81 Input Low Low Low High
242
13.2.2 Socket Adapter Pin Assignments and Memory Map The H8/330 can be programmed with a general-purpose PROM writer. Since the H8/330 package has 80 or 84 pins instead of 28, a socket adapter is necessary. Table 13-3 lists recommended socket adapters. Figure 13-2 shows the socket adapter pin assignments by giving the correspondence between H8/330 pins and HN27C256 pin functions. Figure 13-3 shows a memory map in the PROM mode. Since the H8/330 has only 16K bytes of on-chip PROM, the address range should be specified as H'0000 to H'3FFF. H'FF data should be specified for unused address areas. It is important to limit the program address range to H'0000 to H'3FFF and specify H'FF data for H'4000 and higher addresses. If data (other than H'FF) are written by mistake in addresses equal to or greater than H'4000, it may become impossible to program or verify the PROM data. With a windowed package, it is possible to erase the data and reprogram, but this cannot be done with a plastic package, so particular care is required. Table 13-3. Recommended Socket Adapters Package 84-Pin PLCC 84-Pin windowed LCC 80-Pin QFP Recommended Socket Adapter HS338ESC01H HS338ESG01H HS338ESH01H
243
H8/330 FP-80A 1 6 65 66 67 68 69 70 71 72 64 63 62 61 60 59 58 57 55 54 53 52 51 50 49 48 74 75 29 8 47 5 4 7 38 12 56 73 - - - - CG-84, CP-84 12 17 79 80 81 82 83 84 1 3 78 77 76 75 74 73 72 71 69 68 67 66 65 63 62 61 5 6 42 19 60 16 15 18 51 2 4 23 24 41 64 70 RES NMI P30 P31 P32 P33 P34 P35 P36 P37 P10 P11 P12 P13 P14 P15 P16 P17 P20 P21 P22 P23 P24 P25 P26 P27 P80 P81 AVCC VCC VCC MD0 MD1 STBY AVSS VSS VSS VSS VSS VSS VSS VSS Pin
EPROM Socket Pin VPP EA9 EO0 EO1 EO2 EO3 EO4 EO5 EO6 EO7 EA0 EA1 EA2 EA3 EA4 EA5 EA6 EA7 EA8 OE EA10 EA11 EA12 EA13 EA14 CE VCC HN27C256H 1 24 11 12 13 15 16 17 18 19 10 9 8 7 6 5 4 3 25 22 21 23 2 26 27 20 28
VSS
14
Notation VPP: Programming voltage (12.5 V) EO7 to EO0: Data input/output EA14 to EA0: Address input OE: CE: Output enable Chip enable
Note: All pins not listed in this figure should be left open.
Figure 13-2. Socket Adapter Pin Assignments
244
Address in MCU mode H'0000
Address in PROM mode H'0000
On-chip PROM H'3FFF H'3FFF
"1" output *
* If this area is read in PROM mode, the output data are H'FF. H'7FFF
Figure 13-3. Memory Map in PROM Mode
13.3 Programming
The write, verify, inhibited, and read sub-modes of the PROM mode are selected as shown in Table 13-4. Table 13-4. Selection of Sub-Modes in PROM Mode Pins VCC VCC VCC VCC
Sub-mode Write Verify Programming inhibited
CE Low High High
OE High Low High
VPP VPP VPP VPP
EO7 - EO0 Data input Data output High-impedance
EA14 - EA0 Address input Address input Address input
Note: The VPP and VCC pins must be held at the VPP and VCC voltage levels. The H8/330 PROM uses the same, standard read/write specifications as the HN27C256 and HN27256. 13.3.1 Writing and Verifying An efficient, high-speed programming procedure can be used to write and verify PROM data. This procedure writes data quickly without subjecting the chip to voltage stress and without sacrificing data reliability. It leaves the data H'FF written in unused addresses.
245
Figure 13-4 shows the basic high-speed programming flowchart. Tables 13-5 and 13-6 list the electrical characteristics of the chip in the PROM mode. Figure 13-5 shows a write/verify timing chart.
START
Set program/verify mode Vcc = 6.0V 0.25V, Vpp = 12.5V 0.5V
Address = 0
n=0
n+1 n
Write time t PW= 1 ms 5% Y N n < 25 N Verify OK? Y Write t OPW= 3n ms Address + 1 Address
Last address? Y Set read mode Vcc = 5.0V 0.5V, Vpp = Vcc
N
Error
N All addresses read? Y END
Figure 13-4. High-Speed Programming Flowchart
246
Figure 13-4
Table 13-5. DC Characteristics (When VCC = 6.0V 0.25V, VPP = 12.5V 0.3V, VSS = 0V, Ta = 25C 5C) Measurement typ max Unit conditions -- VCC + 0.3 V
EO7 - EO0, EA14 - EA10, EA8 - EA0, OE, CE EA9 Input Low voltage EO7 - EO0, EA14 - EA0, OE, CE Output High voltage EO7 - EO0 Output Low voltage EO7 - EO0 Input leakage EO7 - EO0, current Vcc current Vpp current EA14 - EA0, OE, CE
Item Input High voltage
Symbol min VIH 2.4
VIL
VCC x 0.7 -- - 0.3 --
VCC + 0.3 V 0.8 V
VOH VOL |ILI|
2.4 -- --
-- -- --
-- 0.45 2
V V A
IOH = -200A IOL = 1.6mA Vin = 5.25V/ 0.5V
ICC Ipp
-- --
-- --
40 40
mA mA
Table 13-6. AC Characteristics (When VCC = 6.0V 0.25V, VPP = 12.5V 0.3V, Ta = 25C 5C) Measurement conditions See Figure 13-5*
Item Address setup time OE setup time Data setup time Address hold time Data hold time Data output disable time Vpp setup time Program pulse width
Symbol
tAS tOES tDS tAH tDH tDF tVPS tPW
min 2 2 2 0 2 -- 2 0.95
typ -- -- -- -- -- -- -- 1.0
max -- -- -- -- -- 130 -- 1.05
Unit s s s s s ns s ms
* Input pulse level: 0.8V to 2.2V Input rise/fall time < 20ns = Timing reference levels: input--1.0V, 2.0V; output--0.8V, 2.0V
247
Table 13-6. AC Characteristics (cont.) (When VCC = 6.0V 0.25V, VPP = 12.5V 0.3V, Ta = 25C 5C) Measurement conditions See Figure 13-5*
Item OE pulse width for overwrite-programming Vcc setup time Data output delay time
Symbol
tOPW tVCS tOE
min 2.85 2 0
typ -- -- --
max 78.75 -- 500
Unit ms s ns
* Input pulse level: 0.8V to 2.2V Input rise/fall time < 20ns = Timing reference levels: input--1.0V, 2.0V; output--0.8V, 2.0V
Write
Verify
Address
tAS
Data Input data Output data
tAH
tDS
VPP VPP VCC
tDH
tDF
tVPS
VCC VCC GND
tVCS
CE
tPW
OE
tOES
tOE
tOPW
Figure 13-5. PROM Write/Verify Timing
248
13.3.2 Notes on Writing (1) Write with the specified voltages and timing. The programming voltage (Vpp) is 12.5V. Caution: Applied voltages in excess of the specified values can permanently destroy the chip. Be particularly careful about the PROM writer's overshoot characteristics. If the PROM writer is set to Intel specifications or Hitachi HN27256 or HN27C256 specifications, VPP will be 12.5V. (2) Before writing data, check that the socket adapter and chip are correctly mounted in the PROM writer. Overcurrent damage to the chip can result if the index marks on the PROM writer, socket adapter, and chip are not correctly aligned. (3) Don't touch the socket adapter or chip while writing. Touching either of these can cause contact faults and write errors. 13.3.3 Reliability of Written Data An effective way to assure the data holding characteristics of the programmed chips is to bake them at 150C, then screen them for data errors. This procedure quickly eliminates chips with PROM memory cells prone to early failure. Figure 13-6 shows the recommended screening procedure.
Write program
Bake with power off 150 10C, 48 Hr + 8 Hr * - 0 Hr
Read and check program Vcc = 4.5V and 5.5V
Install
Note: Baking time should be measured from the point when the baking oven reaches 150C.
Figure 13-6. Recommended Screening Procedure
249
If a series of write errors occurs while the same PROM writer is in use, stop programming and check the PROM writer and socket adapter for defects, using a microcomputer chip with a windowed package and on-chip EPROM. Please inform Hitachi of any abnormal conditions noted during programming or in screening of program data after high-temperature baking. 13.3.4 Erasing of Data The windowed package enables data to be erased by illuminating the window with ultraviolet light. Table 13-7 lists the erasing conditions. Table 13-7. Erasing Conditions Item Ultraviolet wavelength Minimum illumination Value 253.7 nm 15W*s/cm2
The conditions in Table 13-7 can be satisfied by placing a 12000W/cm2 ultraviolet lamp 2 or 3 centimeters directly above the chip and leaving it on for about 20 minutes.
13.4 Handling of Windowed Packages
(1) Glass Erasing Window: Rubbing the glass erasing window of a windowed package with a plastic material or touching it with an electrically charged object can create a static charge on the window surface which may cause the chip to malfunction. If the erasing window becomes charged, the charge can be neutralized by a short exposure to ultraviolet light. This returns the chip to its normal condition, but it also reduces the charge stored in the floating gates of the PROM, so it is recommended that the chip be reprogrammed afterward. Accumulation of static charge on the window surface can be prevented by the following precautions: x When handling the package, ground yourself. Don't wear gloves. Avoid other possible sources of static charge. y Avoid friction between the glass window and plastic or other materials that tend to accumulate static charge.
250
Be careful when using cooling sprays, since they may have a slight ion content. { Cover the window with an ultraviolet-shield label, preferably a label including a conductive material. Besides protecting the PROM contents from ultraviolet light, the label protects the chip by distributing static charge uniformly. (2) Handling after Programming: Fluorescent light and sunlight contain small amounts of ultraviolet, so prolonged exposure to these types of light can cause programmed data to invert. In addition, exposure to any type of intense light can induce photoelectric effects that may lead to chip malfunction. It is recommended that after programming the chip, you cover the erasing window with a light-proof label (such as an ultraviolet-shield label). (3) Note on 84-Pin LCC Package: A socket should always be used when the 84-pin LCC package is mounted on a printed-circuit board. Table 13.8 lists the recommended socket. Table 13-8. Recommended Socket for Mounting 84-Pin LCC Package Manufacturer Sumitomo 3-M Code 284-1273-00-1102J
251
Section 14. Power-Down State
14.1 Overview
The H8/330 has a power-down state that greatly reduces power consumption by stopping some or all of the chip functions. The power-down state includes three modes: (1) Sleep mode - a software-triggered mode in which the CPU halts but the rest of the chip remains active (2) Software standby mode - a software-triggered mode in which the entire chip is inactive (3) Hardware standby mode - a hardware-triggered mode in which the entire chip is inactive Table 14-1 lists the conditions for entering and leaving the power-down modes. It also indicates the status of the CPU, on-chip supporting modules, etc. in each power-down mode. Table 14-1. Power-Down State Entering procedure Execute SLEEP instruction Set SSBY bit in SYSCR to "1," then execute SLEEP instruction Set STBY pin to Low level CPU Sup. Reg's. Mod.* RAM Held Run Held I/O ports Held Exiting methods * Interrupt * RES * STBY * NMI * IRQ0 - IRQ2 * STBY * RES * STBY High, then RES Low High
Mode Sleep mode Software standby mode Hardware standby mode Notes 1. 2. 3.
Clock Run
CPU Halt
Halt
Halt
Held
Halt Held and initialized Halt Held and initialized
Held
Halt
Halt
Not held
High impedance state
SYSCR: System control register SSBY: Software standby bit On-chip supporting modules, including the dual-port RAM.
253
14.2 System Control Register: Power-Down Control Bits
Bits 7 to 4 of the system control register (SYSCR) concern the power-down state. Specifically, they concern the software standby mode. Table 14-2 lists the attributes of the system control register. Table 14-2. System Control Register Name System control register Bit Initial value Read/Write 7 SSBY 0 R/W Abbreviation SYSCR 6 STS2 0 R/W 5 STS1 0 R/W R/W R/W 4 STS0 0 R/W Initial value H'09 3 -- 1 -- Address H'FFC4 0 RAME 1 R/W
2 1 NMIEG DPME 0 0 R/W R/W
Bit 7 - Software Standby (SSBY): This bit enables or disables the transition to the software standby mode. On recovery from the software standby mode by an external interrupt, SSBY remains set to "1." To clear this bit, software must write a "0." Bit 7 SSBY 0 1
Description The SLEEP instruction causes a transition to the sleep mode. The SLEEP instruction causes a transition to the software standby mode.
(Initial value)
Bits 6 to 4 - Standby Timer Select 2 to 0 (STS2 to STS0): These bits select the clock settling time when the chip recovers from the software standby mode by an external interrupt. During the selected time, the clock oscillator runs but clock pulses are not supplied to the CPU or the on-chip supporting modules.
254
Bit 6 STS2 0 0 0 0 1
Bit 5 STS1 0 0 1 1 --
Bit 4 STS0 0 1 0 1 --
Description Settling time = 8192 states Settling time = 16384 states Settling time = 32768 states Settling time = 65536 states Settling time = 131072 states
(Initial value)
When the H8/330's on-chip clock generator is used, the STS bits should be set to allow a settling time of at least 10ms. Table 14-3 lists the settling times selected by these bits at several clock frequencies and indicates the recommended settings. When the H8/330 is externally clocked, the STS bits can be set to any value. The minimum value (STS2 = STS1 = STS0 = "0") is recommended. Table 14-3. Times Set by Standby Timer Select Bits (Unit: ms) Settling time (states) 8192 16384 32768 65536 131072
STS2 0 0 0 0 1
STS1 0 0 1 1 --
STS0 0 1 0 1 --
10 0.8 1.6 3.3 6.6 13.1
System clock frequency (MHz) 8 6 4 2 1 1.0 1.3 2.0 4.1 8.2 2.0 2.7 4.1 8.2 16.4 4.1 5.5 8.2 16.4 32.8 8.2 10.9 16.4 32.8 65.5 16.4 21.8 32.8 65.5 131.1
0.5 16.4 32.8 65.5 131.1 262.1
Notes: 1. All times are in milliseconds. 2. Recommended values are printed in boldface.
14.3 Sleep Mode
The sleep mode provides an effective way to conserve power while the CPU is waiting for an external interrupt or an interrupt from an on-chip supporting module.
255
14.3.1 Transition to Sleep Mode When the SSBY bit in the system control register is cleared to "0," execution of the SLEEP instruction causes a transition from the program execution state to the sleep mode. After executing the SLEEP instruction, the CPU halts, but the contents of its internal registers remain unchanged. The on-chip supporting modules continue to operate normally. 14.3.2 Exit from Sleep Mode The chip wakes up from the sleep mode when it receives an internal or external interrupt request, or a Low input at the RES or STBY pin. (1) Wake-Up by Interrupt: An interrupt releases the sleep mode and starts the CPU's interrupthandling sequence. If an interrupt from an on-chip supporting module is disabled by the corresponding enable/disable bit in the module's control register, the interrupt cannot be requested, so it cannot wake the chip up. Similarly, the CPU cannot be awoken by an interrupt other than NMI if the I (interrupt mask) bit in the CCR (condition code register) is set when the SLEEP instruction is executed. (2) Wake-Up by RES pin: When the RES pin goes Low, the chip exits from the sleep mode to the reset state. (3) Wake-Up by STBY pin: When the STBY pin goes Low, the chip exits from the sleep mode to the hardware standby mode.
14.4 Software Standby Mode
In the software standby mode, the system clock stops and chip functions halt, including both CPU functions and the functions of the on-chip supporting modules. Power consumption is reduced to an extremely low level. The on-chip supporting modules and their registers are reset to their initial states, but as long as a minimum necessary voltage supply is maintained (at least 2V), the contents of the CPU registers and on-chip RAM remain unchanged.
256
14.4.1 Transition to Software Standby Mode To enter the software standby mode, set the standby bit (SSBY) in the system control register (SYSCR) to "1," then execute the SLEEP instruction. 14.4.2 Exit from Software Standby Mode The chip can be brought out of the software standby mode by an input at one of six pins: NMI, IRQ0, IRQ1, IRQ2, RES, or STBY. (1) Recovery by External Interrupt: When an NMI, IRQ0, IRQ1, or IRQ2 request signal is received, the clock oscillator begins operating. After the waiting time set in the system control register (bits STS2 to STS0), clock pulses are supplied to the CPU and on-chip supporting modules. The CPU executes the interrupt-handling sequence for the requested interrupt, then returns to the instruction after the SLEEP instruction. The SSBY bit is not cleared. See Section 14.2, "System Control Register: Power-Down Control Bits" for information about the STS bits. Interrupts IRQ3 to IRQ7 should be disabled before entry to the software standby mode. Clear IRQ3E to IRQ7E to "0" in the interrupt enable register (IER). (2) Recovery by RES Pin: When the RES pin goes Low, the clock oscillator starts. Next, when the RES pin goes High, the CPU begins executing the reset sequence. The SSBY bit is cleared to "0." The RES pin must be held Low long enough for the clock to stabilize. (3) Recovery by STBY Pin: When the STBY pin goes Low, the chip exits from the software standby mode to the hardware standby mode. 14.4.3 Sample Application of Software Standby Mode In this example the H8/330 enters the software standby mode when NMI goes Low and exits when NMI goes High, as shown in Figure 14-1.
257
The NMI edge bit (NMIEG) in the system control register is originally cleared to "0," selecting the falling edge. When NMI goes Low, the NMI interrupt handling routine sets NMIEG to "1," sets SSBY to "1" (selecting the rising edge), then executes the SLEEP instruction. The H8/330 enters the software standby mode. It recovers from the software standby mode on the next rising edge of NMI.
Clock generator
O
NMI
NMIEG
SSBY Settling time
NMI interrupt handler NMIEG = "1" SSBY = "1"
Software standby mode (power-down state) SLEEP
NMI interrupt handler
Figure 14-1. Software Standby Mode (when) NMI Timing 14.4.4 Application Notes (1) The I/O ports retain their current states in the software standby mode. If a port is in the High output state, the current dissipation caused by the High output current is not reduced. (2) If the software standby mode is entered under either condition x or condition below, current dissipation is greater than in normal standby mode. x In single-chip mode (mode 3): if software standby mode is entered by executing an instruction stored in on-chip ROM, after even one instruction not stored in on-chip ROM has been fetched (e.g. from on-chip RAM). In expanded mode with on-chip ROM enabled (mode 2): if software standby mode is entered by executing an instruction stored in on-chip ROM, after even one instruction not stored in on-chip ROM has been fetched (e.g. from external memory or on-chip RAM).
258
Note that the H8/300 CPU pre-fetches instructions. If an instruction stored in the last two bytes of on-chip ROM is executed (at addresses H'3FFE and H'3FFF in the H8/330), the contents of the next two bytes (H'4000 and H'4001), which are not in on-chip ROM, will be fetched as the next instruction. This problem does not occur in expanded mode when on-chip ROM is disabled (mode 1). In hardware standby mode there is no such additional current dissipation, regardless of the conditions when hardware standby mode is entered.
14.5 Hardware Standby Mode
14.5.1 Transition to Hardware Standby Mode Regardless of its current state, the chip enters the hardware standby mode whenever the STBY pin goes Low. The hardware standby mode reduces power consumption drastically by halting the CPU, stopping all the functions of the on-chip supporting modules, and placing I/O ports in the high-impedance state. The registers of the on-chip supporting modules are reset to their initial values. Only the onchip RAM is held unchanged, provided the minimum necessary voltage supply is maintained (at least 2V). Notes: 1. The RAME bit in the system control register should be cleared to "0" before the STBY pin goes Low, to disable the on-chip RAM during the hardware standby mode. 2. Do not change the inputs at the mode pins (MD1, MD0) during hardware standby mode. Be particularly careful not to let both mode pins go Low in hardware standby mode, since that places the chip in PROM mode and increases current dissipation.
14.5.2 Recovery from Hardware Standby Mode Recovery from the hardware standby mode requires inputs at both the STBY and RES pins. When the STBY pin goes High, the clock oscillator begins running. The RES pin should be Low at this time and should be held Low long enough for the clock to stabilize. When the RES pin changes from Low to High, the reset sequence is executed and the chip returns to the program execution state.
259
14.5.3 Timing Relationships Figure 14-2 shows the timing relationships in the hardware standby mode. In the sequence shown, first RES goes Low, then STBY goes Low, at which point the H8/330 enters the hardware standby mode. To recover, first STBY goes High, then after the clock settling time, RES goes High.
Clock pulse generator
RES
STBY
Clock settling time Result
Figure 14-2. Hardware Standby Mode Timing
260
Section 15. E-Clock Interface
15.1 Overview
For interfacing to peripheral devices that require it, the H8/330 can generate an E clock output. Special instructions (MOVTPE, MOVFPE) perform data transfers synchronized with the E clock. The E clock is created by dividing the system clock (O) by 8. The E clock is output at the P80 pin when the P80DDR bit in the port 8 data direction register (P8DDR) is set to "1." It is output only in the expanded modes (mode 1 and mode 2); it is not output in the single-chip mode. Output begins immediately after a reset. When the CPU executes an instruction that synchronizes with the E clock, the address strobe (AS), the address on the address bus, and the IOS signal are output as usual, but the RD and WR signal lines and the data bus do not become active until the falling edge of the E clock is detected. The length of the access cycle for an instruction synchronized with the E clock accordingly varies from 9 to 16 states. Figures 15-1 and 15-2 show the timing in the cases of maximum and minimum synchronization delay. It is not possible to insert wait states (Tw) during the execution of an instruction synchronized with the E clock by input at the WAIT pin.
261
Figure 15-1.
Execution Cycle of Instruction Synchronized with E Clock in Expanded Modes (Maximum Synchronization Delay)
Figure 15-2. Execution Cycle of Instruction Synchronized with E Clock in Expanded Modes (Minimum Synchronization Delay)
263
Section 16. Clock Pulse Generator
16.1 Overview
The H8/330 chip has a built-in clock pulse generator (CPG) consisting of an oscillator circuit, a system (O) clock divider, an E clock divider, and a prescaler. The prescaler generates clock signals for the on-chip supporting modules. 16.1.1 Block Diagram
CPG
Prescaler
XTAL EXTAL
Oscillator circuit
Divider /2
Divider /8
O
E
O/2 to O/4096
Figure 16-1. Block Diagram of Clock Pulse Generator
16.2 Oscillator Circuit
If an external crystal is connected across the EXTAL and XTAL pins, the on-chip oscillator circuit generates a clock signal for the system clock divider. Alternatively, an external clock signal can be applied to the EXTAL pin. (1) Connecting an External Crystal x Circuit Configuration: An external crystal can be connected as in the example in Figure 16-2. An AT-cut parallel resonating crystal should be used.
265
CL1 EXTAL
XTAL CL2 CL1 = CL2 = 10 to 22pF
Figure 16-2. Connection of Crystal Oscillator (Example) y Crystal Oscillator: The external crystal should have the characteristics listed in Table 16-1. Table 16-1. External Crystal Parameters Frequency (MHz) Rs max () C0 (pF) 2 500 4 120 8 12 60 40 7 pF max 16 30 20 20
CL L XTAL RS EXTAL
C0 AT-cut parallel resonating crystal
Figure 16-3. Equivalent Circuit of External Crystal Note on Board Design: When an external crystal is connected, other signal lines should be kept away from the crystal circuit to prevent induction from interfering with correct oscillation. See Figure 16-4. The crystal and its load capacitors should be placed as close as possible to the XTAL and EXTAL pins.
266
Not allowed
Signal A
Signal B H8/330
CL2 XTAL
EXTAL CL1
Figure 16-4. Notes on Board Design around External Crystal (2) Input of External Clock Signal x Circuit Configuration: An external clock signal can be input at the EXTAL pin. The reversephase clock signal should be input at the XTAL pin, as shown in the example in Figure 16-5.
EXTAL External clock input 74HC04 XTAL
Figure 16-5. External Clock Input (Example) y External Clock Input Frequency Duty factor Double the system clock (O) frequency 45% to 55%
267
16.3 System Clock Divider
The system clock divider divides the crystal oscillator or external clock frequency by 2 to create the system clock (O). An E clock signal is created by dividing the system clock by 8. Figure 16-6 shows the phase relationship of the E clock to the system clock.
O
E
Figure 16-6. Phase Relationship of System Clock and E Clock
268
Section 17. Electrical Specifications
17.1 Absolute Maximum Ratings
Table 17-1 lists the absolute maximum ratings. Table 17-1. Absolute Maximum Ratings Item Supply voltage Programming voltage Input voltage Ports 1 - 6, 8, 9 Port 7 Analog supply voltage Analog input voltage Operating temperature Storage temperature Symbol VCC VPP Vin Vin AVCC VAN Topr Tstg Rating -0.3 to +7.0 -0.3 to +13.5 -0.3 to VCC + 0.3 -0.3 to AVCC + 0.3 -0.3 to +7.0 -0.3 to AVCC + 0.3 Regular specifications: -20 to +75 Wide-range specifications: - 40 to +85 -55 to +125 Unit V V V V V V C C C
Note: The input pins have protection circuits that guard against high static voltages and electric fields, but these high input-impedance circuits should never receive overvoltages exceeding the absolute maximum ratings shown in table 17-1.
17.2 Electrical Characteristics
17.2.1 DC Characteristics Table 17-2 lists the DC characteristics of the H8/330.
269
Table 17-2. DC Characteristics Conditions: VCC = 5.0V 10%*, AVCC = 5.0V 10%, VSS = AVSS = 0V, Ta = -20 to 75C (regular specifications), Ta = -40 to 85C (wide-range specifications) Measurement Unit conditions V V V V
Symbol min P67 - P62, P60, VT1.0 + VT input voltage P86 - P80, - (1) P97, P94 - P90 VT+ -VT- 0.4 VIH VCC - 0.7 Input High voltage RES, STBY, (2) MD1, MD0 EXTAL, NMI VCC x 0.7 P77 - P70 2.2 Input High voltage Input pins VIH 2.2 other than (1) and (2) Input Low voltage RES, STBY VIL -0.3 (3) MD1, MD0 Input Low voltage Input pins VIL -0.3 other than (1) and (3) Output High All output pins VOH VCC - 0.5 voltage 3.5 Output Low All output pins VOL - voltage Ports 1 and 2 - Input leakage RES |Iin| - current STBY, NMI, - MD1, MD0 P77 - P70 -
Item Schmitt trigger
typ - - - - - - -
max - 3.5 - VCC + 0.3
VCC + 0.3 V AVCC + 0.3 V VCC + 0.3 V
- -
0.5 0.8
V V
- - - - - - -
- - 0.4 1.0 10.0 1.0 1.0
V V V V A A A
IOH = -200A IOH = -1.0mA IOL = 1.6mA IOL = 10.0mA Vin = 0.5V to VCC - 0.5V Vin = 0.5V to AVCC - 0.5V Vin = 0.5V to VCC - 0.5V Vin = 0V
Leakage current Ports 1, 2, 3 |ITSI| - - 1.0 A in 3-state (off state) 4, 5, 6, 8, 9 Input pull-up Ports 1, 2, 3 -Ip 30 - 250 A MOS current 4, 5, 6, 8, 9 * Connect AVCC to the power supply (+5V) even when the A/D converter is not used.
270
Table 17-2. DC Characteristics (cont.) Conditions: VCC = AVCC = 5.0V 10%, VSS = AVSS = 0V, Ta = -20 to 75C (regular specifications) Ta = -40 to 85C (wide-range specifications) Measurement conditions Vin = 0V f = 1MHz Ta = 25C f = 6MHz f = 8MHz f = 10MHz f = 6MHz f = 8MHz f = 10MHz
Item Input capacitance
Current dissipation*1
RES (VPP) NMI All input pins except RES and NMI Normal operation Sleep mode
Symbol min Cin - - -
typ - - -
max 60 30 15
Unit pF pF pF
ICC
Analog supply current RAM standby voltage
Standby modes*2 During A/D AICC conversion Waiting VRAM
- - - - - - - - - 2.0
12 16 20 8 10 12 0.01 0.6
25 30 40 15 20 25 5.0 1.5
mA mA mA mA mA mA A mA A V
0.01 5.0 - -
*1 Current dissipation values assume that VIH min. = VCC - 0.5V, VIL max. = 0.5V, all output pins are in the no-load state, and all MOS input pull-ups are off. *2 For these values it is assumed that VRAM VCC < 4.5V and VIH min. = VCC x 0.9, VIL max. = 0.3V.
271
Table 17-3. Allowable Output Current Sink Values Conditions: VCC = AVCC = 5.0V 10%, VSS = AVSS = 0V, Ta = -20 to 75C (regular specifications) Ta = -40 to 85C (wide-range specifications) Item Allowable output Low current sink (per pin) Allowable output Low current sink (total) Allowable output High current sink (per pin) Allowable output High current sink (total) Symbol IOL IOL -IOH -IOH min - - - - - - typ - - - - - - max 10 2.0 80 120 2.0 40 Unit mA mA mA mA mA mA
Ports 1 and 2 Other output pins Ports 1 and 2, total All output pins All output pins Total of all output
Note: To avoid degrading the reliability of the chip, be careful not to exceed the output current sink values in table 17-3. In particular, when driving a Darlington transistor pair or LED directly, be sure to insert a current-limiting resistor in the output path. See figures 17-1 and 17-2.
H8/330
2 k Port
Darlington pair
Figure 17-1. Example of Circuit for Driving a Darlington Pair
H8/330
Vcc
600
Port 1 or 2
LED
Figure 17-2. Example of Circuit for Driving a LED
272
17.2.2 AC Characteristics The AC characteristics of the H8/330 chip are listed in three tables. Bus timing parameters are given in table 17-4, control signal timing parameters in table 17-5, and timing parameters of the onchip supporting modules in table 17-6. Table 17-4. Bus Timing Conditions: VCC = 5.0V 10%, O = 0.5 to 10MHz, VSS = 0V, Ta = -20 to 75C (regular specifications), Ta = -40 to 85C (wide-range specifications) Measurement Item Clock cycle time Clock pulse width Low Clock pulse width High Clock rise time Clock fall time Address delay time Address hold time Address strobe delay time Write strobe delay time Strobe delay time Write strobe pulse width Address setup time 1 Address setup time 2 Read data setup time Read data hold time Write data delay time Read data access time Write data setup time Write data hold time Wait setup time Wait hold time E clock delay time E clock rise time E clock fall time Read data hold time (for E clock) Write data hold time (for E clock) Measurement Symbol conditions Fig. 17-4 tcyc Fig. 17-4 tCL Fig. 17-4 tCH Fig. 17-4 tCr Fig. 17-4 tCf Fig. 17-4 tAD Fig. 17-4 tAH Fig. 17-4 tASD Fig. 17-4 tWSD Fig. 17-4 tSD Fig. 17-4 tWSW Fig. 17-4 tAS1 Fig. 17-4 tAS2 Fig. 17-4 tRDS Fig. 17-4 tRDH Fig. 17-4 tWDD Fig. 17-4 tACC Fig. 17-4 tWDS Fig. 17-4 tWDH Fig. 17-5 tWTS Fig. 17-5 tWTH Fig. 17-6 tED Fig. 17-6 tEr Fig. 17-6 tEf Fig. 17-6 tRDHE tWDHE Fig. 17-6 6MHz min max 166.7 2000 65 - 65 - - 15 - 15 - 70 30 - - 70 - 70 - 70 200 - 25 - 105 - 70 - 0 - - 70 - 270 30 - 30 - 40 - 10 - - 20 - 15 - 15 0 - 50 - 8MHz min max 125 2000 45 - 45 - - 15 - 15 - 60 25 - - 60 - 60 - 60 150 - 20 - 80 - 55 - 0 - - 60 - 190 15 - 25 - 40 - 10 - - 20 - 15 - 15 0 - 40 - 10MHz min max 100 2000 35 - 35 - - 15 - 15 - 55 20 - - 50 - 50 - 50 120 - 15 - 65 - 50 - 0 - - 60 - 160 10 - 20 - 40 - 10 - - 20 - 15 - 15 0 - 30 -
Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
273
Table 17-5. Control Signal Timing Conditions: VCC = 5.0V 10%, O = 0.5 to 10MHz, VSS = 0V, Ta = -20 to 75C (regular specifications), Ta = -40 to 85C (wide-range specifications) Measurement Item RES setup time RES pulse width Mode programming setup time NMI setup time (NMI, IRQ0 to IRQ7) NMI hold time (NMI, IRQ0 to IRQ7) Interrupt pulse width for recovery from software standby mode (NMI, IRQ0 to IRQ2) Crystal oscillator settling time (reset) Crystal oscillator settling time (software standby) Measurement Symbol conditions Fig. 17-7 tRESS Fig. 17-7 tRESW tMDS Fig. 17-7 tNMIS tNMIH tNMIW Fig. 17-8 Fig. 17-8 Fig. 17-8 6MHz min max 200 - 10 - 4 - 110 10 200 - - - 8MHz min max 200 - 10 - 4 - 110 10 200 - - - 10MHz min max 200 - 10 - 4 - 110 10 200 - - -
Unit ns tcyc tcyc ns ns ns
tOSC1 tOSC2
Fig. 17-9 Fig. 17-10
20 10
- -
20 10
- -
20 10
- -
ms ms
Table 17-6. Timing Conditions of On-Chip Supporting Modules Conditions: VCC = 5.0V 10%, O = 0.5 to 10MHz, VSS = 0V, Ta = -20 to 75C (regular specifications), Ta = -40 to 85C (wide-range specifications) Measurement 6MHz 8MHz 10MHz Item Symbol conditions min max min max min max Unit Fig. 17-11 - 100 - 100 - 100 ns FRT Timer output tFTOD delay time Fig. 17-11 50 - 50 - 50 - ns Timer input tFTIS setup time Fig. 17-12 50 - 50 - 50 - ns Timer clock tFTCS input setup time 1.5 - 1.5 - 1.5 - tcyc Timer clock tFTCWH Fig. 17-12 pulse width tFTCWL
274
Table 17-6. Timing Conditions of On-Chip Supporting Modules (cont.) Conditions: VCC = 5.0V 10%, O = 0.5 to 10MHz, VSS = 0V, Ta = -20 to 75C (regular specifications), Ta = -40 to 85C (wide-range specifications) Measurement 6MHz Symbol conditions min max - 100 tTMOD Fig. 17-13 Fig. 17-15 Fig. 17-14 Fig. 17-14 50 50 1.5 - - - 8MHz min max - 100 50 50 1.5 - - - 10MHz min max Unit - 100 ns 50 50 1.5 - - - ns ns tcyc
TMR
PWM SCI
Ports
Item Timer output delay time Timer reset tTMRS input setup time Timer clock tTMCS input setup time Timer clock tTMCWH pulse width (single edge) Timer clock tTMCWL pulse width (both edges) Timer output tPWOD delay time Input (Async) tscyc clock (Sync) tscyc cycle Transmit data tTXD delay time (Sync) Receive data tRXS setup time (Sync) Receive data tRXH hold time (Sync) Input clock tSCKW pulse width Output data tPWD delay time Input data setup tPRS time Input data hold tPRH time
Fig. 17-14
2.5
-
2.5
-
2.5
-
tcyc
Fig. 17-16 Fig. 17-17 Fig. 17-17 Fig. 17-17 Fig. 17-17 Fig. 17-17 Fig. 17-18 Fig. 17-19 Fig. 17-19 Fig. 17-19
- 2 4 - 100 100 0.4 - 50 50
100 - - 100 - - 0.6 100 - -
- 2 4 - 100 100 0.4 - 50 50
100 - - 100 - - 0.6 100 - -
- 2 4 - 100 100 0.4 - 50 50
100 - - 100 - - 0.6 100 - -
ns tcyc tcyc ns ns ns tscyc ns ns ns
275
Table 17-6. Timing Conditions of On-Chip Supporting Modules (cont.) Conditions: VCC = 5.0V 10%, O = 0.5 to 10MHz, VSS = 0V, Ta = -20 to 75C (regular specifications), Ta = -40 to 85C (wide-range specifications) Measurement 6MHz Symbol conditions min max tDAA Fig. 17-20 - 150 tDACS tDOE tDCHZ tDOHZ tDOH tDCW tDAW tDAS tDWP tDWR tDDW tDDH Fig. 17-20 Fig. 17-20 Fig. 17-20 Fig. 17-20 Fig. 17-20 Fig. 17-21 Fig. 17-21 Fig. 17-21 Fig. 17-21 Fig. 17-21 Fig. 17-21 Fig. 17-21 - - - - 0 100 100 20 90 20 60 15 130 70 50 50 - - - - - - - - 8MHz min max - 150 - - - - 0 100 100 20 90 20 60 15 130 70 50 50 - - - - - - - - 10MHz min max Unit - 150 ns - - - - 0 100 100 20 90 20 60 15 130 70 50 50 - - - - - - - - ns ns ns ns ns ns ns ns ns ns ns ns
Dualport RAM read cycle
Item Address access time CS access time OE output delay time CS output floating time OE output floating time Output data hold time Chip select time Address valid time Address setup time Write pulse width Address hold time Input data setup time Input data hold time
Dualport RAM write cycle
276
* Measurement Conditions for AC Characteristics
5V RL LSI output pin RH C C = 90 pF: Ports 1 - 4, 6, 9 30 pF: Ports 5, 8 RL = 2.4 k RH = 12 k
Input/output timing reference levels Low: 0.8 V High: 2.0 V
Figure 17-3. Output Load Circuit 17.2.3 A/D Converter Characteristics Table 17-7 lists the characteristics of the on-chip A/D converter.
Fig. 17-3
Table 17-7. A/D Converter Characteristics Conditions: VCC = AVCC = 5.0V 10%, VSS = AVSS = 0V, Ta = -20 to 75C (regular specifications) Ta = -40 to 85C (wide-range specifications) 6MHz min typ 8 8 -- -- -- -- -- -- -- -- -- 8MHz min typ 8 8 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 10MHz max min typ 8 8 8 15.25 -- -- 20 10 1 1 1 0.5 1.5 -- -- -- -- -- -- -- -- -- -- -- -- -- --
Item Resolution Conversion time (single mode) Analog input capacitance -- Allowable signal -- source impedance Nonlinearity error -- Offset error -- Full-scale error -- Quantizing error -- Absolute accuracy --
max 8 20.4 20 10 1 1 1 0.5 1.5
max Unit 8 Bits 12.2 s 20 10 1 1 1 0.5 1.5 pF k LSB LSB LSB LSB LSB
277
17.3 MCU Operational Timing
This section provides the following timing charts: 17.3.1 17.3.2 17.3.3 17.3.4 17.3.5 17.3.6 17.3.7 17.3.8 Bus Timing Control Signal Timing 16-Bit Free-Running Timer Timing 8-Bit Timer Timing PWM Timer Timing SCI Timing I/O Port Timing Dual-port RAM Timing Figures 17-4 to 17-6 Figures 17-7 to 17-10 Figures 17-11 to 17-12 Figures 17-13 to 17-15 Figure 17-16 Figures 17-17 to 17-18 Figure 17-19 Figures 17-20 to 17-21
17.3.1 Bus Timing (1) Basic Bus Cycle (Without Wait States) in Expanded Modes
T1 t cyc t CH O t AD A15 to A0 IOS t ASI AS, RD (Read) t ACC D7 to D0 (Read) t AS2 WR tWDD D7 to D0 (Write) t WDS t Cf t Cr tCL
T2
T3
t ASD
t SD t AH
tRDS
tRDH
t WSD tWSW
t SD t AH
t WDH
Figure 17-4. Basic Bus Cycle (Without Wait States) in Expanded Modes
278
(2) Basic Bus Cycle (With 1 Wait State) in Expanded Modes
T1 O T2 TW T3
A15 to A0 IOS
AS, RD
D7 to D0 (Read)
WR
D7 to D0 (Write)
t WTS t WTH
tWTS
tWTH
WAIT
Figure 17-5. Basic Bus Cycle (With 1 Wait State) in Expanded Modes
279
(3) E Clock Bus Cycle
O tED E tEr tAD A15 - A0, IOS tAS1 AS tAD RD, WR tRDS D7 to D0 (Read) tWDHE D7 to D0 (Write) tRDH tRDHE tAD tSD tAH tEf tED
Figure 17-6. E Clock Bus Cycle 17.3.2 Control Signal Timing (1) Reset Input Timing
Fig. 17-6
O
tRESS
RES
tRESS
t MDS
MD1 and MD0
tRESW
Figure 17-7. Reset Input Timing
280
(2) Interrupt Input Timing
O
t NMIS
NMI IRQi (Edge)
t NMIH
t NMIS
IRQi (Level)
tNMIW
NMI IRQi
Note: i = 0 to 7
Figure 17-8. Interrupt Input Timing
Fig. 17-8
281
O
VCC
STBY
tOSC1
tOSC1
RES
Figure 17-9. Clock Settling Timing
(4) Clock Settling Timing for Recovery from Software Standby Mode
O
NMI
IRQi (i = 0, 1, 2)
t OSC2
Figure 17-10. Clock Settling Timing for Recovery from Software Standby Mode 17.3.3 16-Bit Free-Running Timer Timing (1) Free-Running Timer Input/Output Timing
O
Free-running Compare-match timer counter
t FTOD
FTOA , FTOB
t FTIS
FTIA, FTIB, FTIC, FTID
Figure 17-11. Free-Running Timer Input/Output Timing
283
(2) External Clock Input Timing for Free-Running Timer
O
tFTCS
FTCI
t FTCWL
tFTCWH
Figure 17-12. External Clock Input Timing for Free-Running Timer 17.3.4 8-Bit Timer Timing (1) 8-Bit Timer Output Timing
O
Timer Compare- match counter
tTMOD
TMCI1, TMCI0
Figure 17-13. 8-Bit Timer Output Timing (2) 8-Bit Timer Clock Input Timing
O
tTMCS
TMCI0, TMCI1
tTMCS
tTMCWL
tTMCWH
Figure 17-14. 8-Bit Timer Clock Input Timing
284
(3) 8-Bit Timer Reset Input Timing
O
tTMRS
TMRI0, TMRI1
Timer counter
n
H'00
Figure 17-15. 8-Bit Timer Reset Input Timing 17.3.5 Pulse Width Modulation Timer Timing
O
Timer counter
Compare- match
tPWOD
PW0, PW1
Figure 17-16. PWM Timer Output Timing 17.3.6 Serial Communication Interface Timing (1) SCI Input/Output Timing
tScyc
Serial clock (CSCK) Transmit data (CTxD)
t TXD
t RXS
Receive data (CRxD)
t RXH
Figure 17-17. SCI Input/Output Timing (Synchronous Mode)
285
(2) SCI Input Clock Timing
t SCKW
ASCK, CSCK
t Scyc
Figure 17-18. SCI Input Clock Timing 17.3.7 I/O Port Timing
Port read/write cycle T1 T2 T3
O
t PRS
Port 1 to (Input) Port 9 Port 1* to (Output) Port 9 * Except P96 and P77 to P70
t PRH
t PWD
* Except P96 and P77 to P70
Figure 17-19. I/O Port Input/Output Timing
286
17.3.8 Dual-Port RAM Timing (1) Read Cycle 1
RS3 to RS0
tDAA
OE
tDOE
CS
tDOH
tDACS
DDB7 to DDB0 Note: WE should be High during a read cycle.
tDOHZ tDCHZ
(2) Read Cycle 2
RS3 to RS0
tDAA tDOH
DDB7 to DDB0
tDOH
Notes: 1. WE should be High during a read cycle. 2. CS = VIL 3. OE = VIL
(3) Read Cycle 3
CS
tDACS
DDB7 to DDB0
tDCHZ
Notes: 1. WE should be High during a read cycle. 2. The address on the register select lines should be set up by the time CS goes Low, or before that time. 3. OE = VIL
Figure 17-20. Dual-Port RAM Read Timing
287
(4) Write Cycle
RS3 to RS0
t DWR2*
OE
t DCW 3*
CS
t DAW tDAS
WE
t DWP1* t DDW
DDB7 to DDB0
t DDH
Notes: 1. Data are written while CS and WE are both low (tDWP). 2. tDWR is measured from the rise of CS or WE, whichever rises first. 3. If CS goes Low at the same time as WE goes Low or after WE goes Low, the output remains in the highimpedance state.
Figure 17-21. Dual-Port RAM Write Timing
288
Appendix A. CPU Instruction Set
A.1 Instruction Set List
Operation Notation Rd8/16 General register (destination) (8 or 16 bits) Rs8/16 General register (source) (8 or 16 bits) Rn8/16 General register (8 or 16 bits) (EAd) Destination operand (EAs) Source operand CCR Condition code register N N (negative) flag in CCR Z Z (zero) flag in CCR V V (overflow) flag in CCR C C (carry) flag in CCR PC Program counter SP Stack pointer #xx:3/8/16 Immediate data (3, 8, or 16 bits) d:8/16 Displacement (8 or 16 bits) @aa:8/16 Absolute address (8 or 16 bits) + Addition - Subtraction x / Multiplication Division AND logical OR logical Exclusive OR logical Move Not
Condition Code Notation Modified according to the instruction result * Undetermined (unpredictable) 0 Always cleared to "0" -- Not affected by the instruction result
289
Appendix B. Instruction Set List
Addressing mode/ instruction length
@(d:8, PC)
Mnemonic
Operation
@Rn @(d:16, Rn) @-Rn/@Rn+
Condition code
#xx:8/16 Rn
@aa:8/16
@@aa
Implied
I
H NZ
VC - - - - - - - - - - - - - - - - - - - - - - - -
MOV.B #xx:8,Rd MOV.B Rs,Rd MOV.B @Rs,Rd MOV.B @(d:16,Rs),Rd MOV.B @Rs+,Rd MOV.B @aa:8,Rd MOV.B @aa:16,Rd MOV.B Rs,@Rd MOV.B Rs,@(d:16,Rd) MOV.B Rs,@-Rd MOV.B Rs,@aa:8 MOV.B Rs,@aa:16 MOV.W #xx:16,Rd MOV.W Rs,Rd MOV.W @Rs,Rd MOV.W @Rs+,Rd MOV.W @aa:16,Rd MOV.W Rs,@Rd MOV.W Rs,@-Rd MOV.W Rs, @aa:16 POP Rd PUSH Rs MOVFPE @aa:16,Rd MOVTPE Rs,@aa:16 EEPMOV
B B B B B B B B B B B B
#xx:8 Rd8 Rs8 Rd8 @Rs16 Rd8 @(d:16,Rs16) Rd8 @Rs16 Rd8 Rs16+1 Rs16 @aa:8 Rd8 @aa:16 Rd8 Rs8 @Rd16 Rs8 @(d:16,Rd16) Rd16-1 Rd16 Rs8 @Rd16 Rs8 @aa:8 Rs8 @aa:16
2 2 2 4 2 2 4 2 4 2 2 4 4 2 2 4 2 4 2 4 2 4 2 2
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W #xx:16 Rd W Rs16 Rd16 W @Rs16 Rd16 W @Rs16 Rd16 Rs16+2 Rs16 W @aa:16 Rd16 W Rs16 @Rd16 W Rd16-2 Rd16 Rs16 @Rd16 W Rs16 @aa:16 W @SP Rd16 SP+2 SP W SP-2 SP Rs16 @SP B B - Not supported Not supported if R4L0 then Repeat @R5 @R6 R5+1 R5 R6+1 R6 R4L-1 R4L Until R4L=0 else next
MOV.W @(d:16,Rs),Rd W @(d:16,Rs16) Rd16
MOV.W Rs,@(d:16,Rd) W Rs16 @(d:16,Rd16)
4
--
---
-
290
No. of States*
2 2 4 6 6 4 6 4 6 6 4 6 4 2 4 6 6 6 4 6 6 6 6 6
Size
Appendix B. Instruction Set List (cont.)
Addressing mode/ instruction length
@-Rn/@Rn+
@(d:16, Rn)
@aa:8/16 @(d:8, PC)
Mnemonic
Operation
Condition code
@@aa
Rn
I -
HNZVC - - -
ADD.B #xx:8,Rd ADD.B Rs,Rd ADD.W Rs,Rd ADDX.B #xx:8,Rd ADDX.B Rs,Rd ADDS.W #1,Rd ADDS.W #2,Rd INC.B Rd DAA.B Rd SUB.B Rs,Rd SUB.W Rs,Rd SUBX.B #xx:8,Rd SUBX.B Rs,Rd SUBS.W #1,Rd SUBS.W #2,Rd DEC.B Rd DAS.B Rd NEG.B Rd CMP.B #xx:8,Rd CMP.B Rs,Rd CMP.W Rs,Rd MULXU.B Rs,Rd DIVXU.B Rs,Rd
B B
Rd8+#xx:8 Rd8 Rd8+Rs8 Rd8
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
- - - - - - - - - - - - - - - - - - - - - -
W Rd16+Rs16 Rd16 B B Rd8+#xx:8 +C Rd8 Rd8+Rs8 +C Rd8
- - - * - -
- - - - *
W Rd16+1 Rd16 W Rd16+2 Rd16 B B B Rd8+1 Rd8 Rd8 decimal adjust Rd8 Rd8-Rs8 Rd8
2 - - - - 2 2 2 2 2 2 2 2 2 2 2 2
W Rd16-Rs16 Rd16 B B Rd8-#xx:8 -C Rd8 Rd8-Rs8 -C Rd8
- - - * - -
- - - - - * - -
W Rd16-1 Rd16 W Rd16-2 Rd16 B B B B B Rd8-1 Rd8 Rd8 decimal adjust Rd8 0-Rd Rd Rd8-#xx:8 Rd8-Rs8
W Rd16-Rs16 B B Rd8xRs8 Rd16 Rd16/Rs8 Rd16 (RdH:remainder, RdL:quotient)
- - -
- 14 - 14
AND.B #xx:8,Rd AND.B Rs,Rd OR.B #xx:8,Rd OR.B Rs,Rd XOR.B #xx:8,Rd XOR.B Rs,Rd NOT.B Rd
B B B B B B B
Rd8#xx:8 Rd8 Rd8Rs8 Rd8 Rd8#xx:8 Rd8 Rd8Rs8 Rd8 Rd8#xx:8 Rd8 Rd8Rs8 Rd8 Rd Rd
2 2 2 2 2 2 2
- - - - - - -
- - - - - - -


0 0 0 0 0 0 0
- - - - - - -
291
No. of States*
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
#xx:8/16
@Rn
Size
Appendix B. Instruction Set List (cont.)
Addressing mode/ instruction length
@-Rn/@Rn+
@(d:16, Rn)
@aa:8/16 @(d:8, PC)
Mnemonic
Operation
Condition code
@@aa
Rn
I -
H N ZV C -
SHAL.B Rd
B
C b7 b0
0
2
2
SHAR.B Rd
B b7 b0
C
2
-
-
0
2
SHLL.B Rd
B
C b7 b0
0
2
-
-
0
2
SHLR.B Rd
B
0 b7 b0
C
2
-
-
0
0
2
ROTXL.B Rd
B
C b7 b0
0
2
-
-
0
2
ROTXR.B Rd
B b7 b0
C
2
-
-
0
2
ROTL.B Rd
B
C b7 b0
0
2
-
-
0
2
ROTR.B Rd
B b7 b0
C
2
-
-
0
2
BSET #xx:3,Rd BSET #xx:3,@Rd BSET #xx:3,@aa:8 BSET Rn,Rd BSET Rn,@Rd BSET Rn,@aa:8 BCLR #xx:3,Rd BCLR #xx:3,@Rd BCLR #xx:3,@aa:8 BCLR Rn,Rd BCLR Rn,@Rd BCLR Rn,@aa:8 BNOT #xx:3,Rd BNOT #xx:3,@Rd BNOT #xx:3,@aa:8
B (#xx:3 of Rd8) 1 B (#xx:3 of @Rd16) 1 B (#xx:3 of @aa:8) 1 B (Rn8 of Rd8) 1 B (Rn8 of @Rd16) 1 B (Rn8 of @aa:8) 1 B (#xx:3 of Rd8) 0 B (#xx:3 of @Rd16) 0 B (#xx:3 of @aa:8) 0 B (Rn8 of Rd8) 0 B (Rn8 of @Rd16) 0 B (Rn8 of @aa:8) 0 B (#xx:3 of Rd8) (#xx:3 of Rd8) B (#xx:3 of @Rd16) (#xx:3 of @Rd16) B (#xx:3 of @aa:8) (#xx:3 of @aa:8)
2 4 4 2 4 4 2 4 4 2 4 4 2 4 4
- - - - - - - - - - - - - - -
- - - - - - - - - - - - - - -
-- -- -- -- -- -- -- -- -- -- -- -- -- -- --
- - - - - - - - - - - - - - -
- - - - - - - - - - - - - - -
2 8 8 2 8 8 2 8 8 2 8 8 2 8 8
292
No. of States*
#xx:8/16
@Rn
Size
Appendix B. Instruction Set List (cont.)
Addressing mode/ instruction length
#xx:8/16 Rn
@(d:16, Rn)
Mnemonic
Operation
@-Rn/@Rn+ @aa:8/16 @(d:8, PC)
Condition code
@@aa
I -
H N ZV C -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
BNOT Rn,Rd BNOT Rn,@Rd BNOT Rn,@aa:8 BTST #xx:3,Rd BTST #xx:3,@Rd BTST #xx:3,@aa:8 BTST Rn,Rd BTST Rn,@Rd BTST Rn,@aa:8 BLD #xx:3,Rd BLD #xx:3,@Rd BLD #xx:3,@aa:8 BILD #xx:3,Rd BILD #xx:3,@Rd BILD #xx:3,@aa:8 BST #xx:3,Rd BST #xx:3,@Rd BST #xx:3,@aa:8 BIST #xx:3,Rd BIST #xx:3,@Rd BIST #xx:3,@aa:8 BAND #xx:3,Rd BAND #xx:3,@Rd BAND #xx:3,@aa:8 BIAND #xx:3,Rd BIAND #xx:3,@Rd BIAND #xx:3, @aa:8 BOR #xx:3,Rd BOR #xx:3,@Rd BOR #xx:3, @aa:8 BIOR #xx:3, Rd
B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B
(Rn8 of Rd8) (Rn8 of Rd8)
(Rn8 of @Rd16) (Rn8 of @Rd16) (Rn8 of @aa:8) (Rn8 of @aa:8)
2 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(#xx:3 of Rd8) Z (#xx:3 of @Rd16) Z (#xx:3 of @aa:8) Z (Rn8 of Rd8) Z (Rn8 of @Rd16) Z (Rn8 of @aa:8) Z (#xx:3 of Rd8) C (#xx:3 of @Rd16) C (#xx:3 of @aa:8) C (#xx:3 of Rd8) C (#xx:3 of @Rd16) C (#xx:3 of @aa:8) C C (#xx:3 of Rd8) C (#xx:3 of @Rd16) C (#xx:3 of @aa:8) C (#xx:3 of Rd8) C (#xx:3 of @Rd16) C (#xx:3 of @aa:8) C(#xx:3 of Rd8) C C(#xx:3 of @Rd16) C C(#xx:3 of @aa:8) C C(#xx:3 of Rd8) C C(#xx:3 of @Rd16) C C(#xx:3 of @aa:8) C C(#xx:3 of Rd8) C C(#xx:3 of @Rd16) C C(#xx:3 of @aa:8) C C(#xx:3 of Rd8) C
293
No. of States*
2 8 8 2 6 6 2 6 6 2 6 6 2 6 6 2 8 8 2 8 8 2 6 6 2 6 6 2 6 6 2
@Rn
Size
Appendix B. Instruction Set List (cont.)
Addressing mode/ instruction length
@-Rn/@Rn+
@(d:16, Rn)
@(d:8, PC)
Mnemonic
Operation
Condition code
@aa:8/16
Rn
@Rn
Size
Branching condition C(#xx:3 of @Rd16) C C(#xx:3 of @aa:8) C C(#xx:3 of Rd8) C C(#xx:3 of @Rd16) C C(#xx:3 of @aa:8) C C(#xx:3 of Rd8) C C(#xx:3 of @Rd16) C C(#xx:3 of @aa:8) C PC PC+d:8 PC PC+2 if condition is true then CZ=0 CZ=1
@@aa
I -
HN ZV -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
C - - - - - - - - - - - - - - - - - - - -
BIOR #xx:3,@Rd BIOR #xx:3, @aa:8 BXOR #xx:3,Rd BXOR #xx:3,@Rd BXOR #xx:3, @aa:8 BIXOR #xx:3,Rd BIXOR #xx:3,@Rd BIXOR #xx:3, @aa:8 BRA d:8 (BT d:8) BRN d:8 (BF d:8) BHI d:8 BLS d:8 BCC d:8 (BHS d:8) BCS d:8 (BLO d:8) BNE d:8 BEQ d:8 BVC d:8 BVS d:8 BPL d:8 BMI d:8 BGE d:8 BLT d:8 BGT d:8 BLE d:8 JMP @Rn JMP @aa:16 JMP @@aa:8 BSR d:8
B B B B B B B B - - - - - - - - - - - - - - - - - - - -
4 4 2 4 4 2 4 4 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 2 2
- - - - - - - - - - - - - - - - - - - - - - - - - - -
PC PC+d:8 C = 0 else next; C=1 Z=0 Z=1 V=0 V=1 N=0 N=1 NV = 0 NV = 1 Z (NV) = 0 Z (NV) = 1 PC Rn16 PC aa:16 PC @aa:8 SP-2 SP PC @SP PC PC+d:8
294
No. of States*
6 6 2 6 6 2 6 6 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 6 8 6
#xx:8/16
Appendix B. Instruction Set List (cont.)
Addressing mode/ instruction length
@Rn @(d:16, Rn)
@aa:8/16 @(d:8, PC)
Mnemonic
Operation
@-Rn/@Rn+
Condition code
#xx:8/16 Rn
@@aa Implied
I -
HN - -
ZVC - - -
JSR @Rn
-
SP-2 SP PC @SP PC Rn16
2
JSR @aa:16
-
SP-2 SP PC @SP PC aa:16
4
-
-
-
-
-
-
JSR @@aa:8
SP-2 SP PC @SP PC @aa:8
2
-
-
-
-
-
-
RTS
-
PC @SP SP+2 SP
2
-
-
-
-
-
-
RTE
-
CCR @SP SP+2 SP PC @SP SP+2 SP
2

10
SLEEP LDC #xx:8,CCR LDC Rs,CCR STC CCR,Rd ANDC #xx:8,CCR ORC #xx:8,CCR XORC #xx:8,CCR NOP
- B B B B B B -
Transit to sleep mode. #xx:8 CCR Rs8 CCR CCR Rd8 CCR#xx:8 CCR CCR#xx:8 CCR CCR#xx:8 CCR PC PC+2 2 2 2 2 2 2
2
- -
- - -
- - -
- - -
- - -
- - -
2
-
Notes: The number of states is the number of states required for execution when the instruction and its operands are located in on-chip memory. x Set to "1" when there is a carry or borrow from bit 11; otherwise cleared to "0." If the result is zero, the previous value of the flag is retained; otherwise the flag is cleared to "0." z Set to "1" if decimal adjustment produces a carry; otherwise cleared to "0." { The number of states required for execution is 4n+8 (n = value of R4L) These instructions are not supported by the H8/338 Series. Set to "1" if the divisor is negative; otherwise cleared to "0." Cleared to "0" if the divisor is not zero; undetermined when the divisor is zero.
295
No. of States*
6 8 8 8 2 2 2 2 2 2 2 2
Size
A.2 Operation Code Map Table A-2 is a map of the operation codes contained in the first byte of the instruction code (bits 15 to 8 of the first instruction word). Some pairs of instructions have identical first bytes. These instructions are differentiated by the first bit of the second byte (bit 7 of the first instruction word). Instruction when first bit of byte 2 (bit 7 of first instruction word) is "0." Instruction when first bit of byte 2 (bit 7 of first instruction word) is "1."
296
Table A-2. Operation Code Map
HI LO
0 NOP
SHLL
1 SLEEP
2 STC
3 LDC
4 ORC OR
5 XORC XOR
6 ANDC AND
7 LDC
NOT NEG
8 ADD SUB
9
A INC DEC
B ADDS SUBS
C MOV CMP
D
E ADDX SUBX
F DAA DAS
0 1 2
SHLR ROTXL ROTXR SHAL SHAR ROTL ROTR
MOV 3 4 5 6 7 8 9 A B C D E F BRA*2 MULXU BSET BRN *2 DIVXU BNOT BCLR BTST
BOR BIOR
BHI
BLS
BCC *2 RTS
BCS *2 BSR
BNE RTE
BEQ
BVC
BVS
BPL JMP
BMI
BGE
BLT
BGT JSR
BLE
BST BIST BXOR BAND BLD BIXOR BIAND BILD
MOV *1 MOV
EEPMOV
Bit manipulation instruction
ADD ADDX CMP SUBX OR XOR AND MOV
*1 The MOVFPE and MOVTPE instructions are identical to MOV instructions in the first byte and first bit of the second byte (bits 15 to 7 of the instruction word). The PUSH and POP instructions are identical in machine language to MOV instructions. *2 The BT, BF, BHS, and BLO instructions are identical in machine language to BRA, BRN, BCC, and BCS, respectively.
A.3 Number of States Required for Execution
The tables below can be used to calculate the number of states required for instruction execution. Table A-3 indicates the number of states required for each cycle (instruction fetch, branch address read, stack operation, byte data access, word data access, internal operation). Table A-4 indicates the number of cycles of each type occurring in each instruction. The total number of states required for execution of an instruction can be calculated from these two tables as follows: Execution states = I x SI + J x SJ + K x SK + L x SL + M x SM + N x SN Examples: Mode 1 (on-chip ROM disabled), stack located in external memory, 1 wait state inserted in external memory access. 1. BSET #0, @FFC7 From table A-4: I = L = 2, J = K = M = N= 0 From table A-3: SI = 8, SL = 3 Number of states required for execution: 2 x 8 + 2 x 3 =22 2. JSR @@30 From table A-4: I = 2, J = K = 1, L = M = N = 0 From table A-3: SI = SJ = SK = 8 Number of states required for execution: 2 x 8 + 1 x 8 + 1 x 8 = 32 Table A-3. Number of States Taken by Each Cycle in Instruction Execution Execution Status (instruction cycle) Instruction fetch Branch address read Stack operation Byte data access Word data access Internal operation Access Location On-Chip Memory On-Chip Reg. Field External Memory SI SJ SK SL SM SN 6 2 3 6 2 3+m 6 + 2m 6 + 2m
Notes: 1. m: Number of wait states inserted in access to external device. 2. The byte data access cycle to an external device by the MOVFPE and MOVTPE instructions requires 9 to 16 states since it is synchronized with the E clock. See section 15, "E-Clock Interface" for timing details.
298
Table A-4. Number of Cycles in Each Instruction
Instruction Branch Fetch Instruction Mnemonic ADD ADD.B #xx:8, Rd ADD.B Rs, Rd ADD.W Rs, Rd ADDS ADDX ADDS.W #1/2, Rd ADDX.B #xx:8, Rd ADDX.B Rs, Rd AND AND.B #xx:8, Rd AND.B Rs, Rd ANDC BAND ANDC #xx:8, CCR BAND #xx:3, Rd BAND #xx:3, @Rd BAND #xx:3, @aa:8 Bcc BRA d:8 (BT d:8) BRN d:8 (BF d:8) BHI d:8 BLS d:8 BCC d:8 (BHS d:8) BCS d:8 (BLO d:8) BNE d:8 BEQ d:8 BVC d:8 BVS d:8 BPL d:8 BMI d:8 BGE d:8 BLT d:8 BGT d:8 BLE d:8 BCLR BCLR #xx:3, Rd BCLR #xx:3, @Rd BCLR #xx:3, @aa:8 BCLR Rn, Rd BCLR Rn, @Rd BCLR Rn, @aa:8 I 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 2 2 1 2 2 2 2 2 2 1 1 Stack Byte Data Word Data Internal Access M Operation N
Addr. Read Operation Access J K L
299
Table A-4. Number of Cycles in Each Instruction (cont.)
Instruction Branch Fetch Instruction Mnemonic BIAND BIAND #xx:3, Rd BIAND #xx:3, @Rd BIAND #xx:3, @aa:8 BILD BILD #xx:3, Rd BILD #xx:3, @Rd BILD #xx:3, @aa:8 BIOR BIOR #xx:3 Rd BIOR #xx:3 @Rd BIOR #xx:3 @aa:8 BIST BIST #xx:3, Rd BIST #xx:3, @Rd BIST #xx:3, @aa:8 BIXOR BIXOR #xx:3, Rd BIXOR #xx:3, @Rd BIXOR #xx:3, @aa:8 BLD BLD #xx:3, Rd BLD #xx:3, @Rd BLD #xx:3, @aa:8 BNOT BNOT #xx:3, Rd BNOT #xx:3, @Rd BNOT #xx:3, @aa:8 BNOT Rn, Rd BNOT Rn, @Rd BNOT Rn, @aa:8 BOR BOR #xx:3, Rd BOR #xx:3, @Rd BOR #xx:3, @aa:8 BSET BSET #xx:3, Rd BSET #xx:3, @Rd BSET #xx:3, @aa:8 BSET Rn, Rd BSET Rn, @Rd BSET Rn, @aa:8 I 1 2 2 1 2 2 1 2 2 1 2 2 1 2 2 1 2 2 1 2 2 1 2 2 1 2 2 1 2 2 1 2 2 2 2 2 2 1 1 2 2 2 2 1 1 1 1 2 2 1 1 1 1 1 1 Stack Byte Data Word Data Internal Access M Operation N
Addr. Read Operation Access J K L
300
Table A-4. Number of Cycles in Each Instruction (cont.)
Instruction Branch Fetch Instruction Mnemonic BSR BST BSR d:8 BST #xx:3, Rd BST #xx:3, @Rd BST #xx:3, @aa:8 BTST BTST #xx:3, Rd BTST #xx:3, @Rd BTST #xx:3, @aa:8 BTST Rn, Rd BTST Rn, @Rd BTST Rn, @aa:8 BXOR BXOR #xx:3, Rd BXOR #xx:3, @Rd BXOR #xx:3, @aa:8 CMP CMP.B #xx:8, Rd CMP.B Rs, Rd CMP.W Rs, Rd DAA DAS DEC DIVXU EEPMOV INC JMP DAA.B Rd DAS.B Rd DEC.B Rd DIVXU.B Rs, Rd EEPMOV INC.B Rd JMP @Rn JMP @aa:16 JMP @@aa:8 JSR JSR @Rn JSR @aa:16 JSR @@aa:8 LDC LDC #xx:8, CCR LDC Rs, CCR MOV MOV.B #xx:8, Rd MOV.B Rs, Rd MOV.B @Rs, Rd MOV.B @(d:16,Rs), Rd I 2 1 2 2 1 2 2 1 2 2 1 2 2 1 1 1 1 1 1 1 2 1 2 2 2 2 2 2 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 2n+2*1 6 1 1 1 1 1 1 2 2 Stack Byte Data Word Data Internal Access M Operation N
Addr. Read Operation Access J K 1 L
301
Table A-4. Number of Cycles in Each Instruction (cont.)
Instruction Branch Fetch Instruction Mnemonic MOV MOV.B @Rs+, Rd MOV.B @aa:8, Rd MOV.B @aa:16, Rd MOV.B Rs, @Rd MOV.B Rs, @(d:16, Rd) MOV.B Rs, @-Rd MOV.B Rs, @aa:8 MOV.B Rs, @aa:16 MOV.W #xx:16, Rd MOV.W Rs, Rd MOV.W @Rs, Rd MOV.W @(d:16, Rs), Rd MOV.W @Rs+, Rd MOV.W @aa:16, Rd MOV.W Rs, @Rd MOV.W Rs, @(d:16, Rd) MOV.W Rs, @-Rd MOV.W Rs, @aa:16 MOVFPE MOVTPE MULXU NEG NOP NOT OR MOVFPE @aa:16, Rd MOVTPE.Rs, @aa:16 MULXU.Rs, Rd NEG.B Rd NOP NOT.B Rd OR.B #xx:8, Rd OR.B Rs, Rd ORC ROTL ROTR ROTXL ROTXR RTE RTS ORC #xx:8, CCR ROTL.B Rd ROTR.B Rd ROTXL.B Rd ROTXR.B Rd RTE RTS I 1 1 2 1 2 1 1 2 2 1 1 2 1 2 1 2 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 2 2 2 1 1 1 1*2 1*2 6 1 1 1 1 1 1 1 1 1 1 Stack Byte Data Word Data Internal Access M Operation N 1
Addr. Read Operation Access J K L 1 1 1 1 1 1 1 1
1
302
Table A-4. Number of Cycles in Each Instruction (cont.)
Instruction Branch Fetch Instruction Mnemonic SHAL SHAR SHLL SHLR SLEEP STC SUB SHAL.B Rd SHAR.B Rd SHLL.B Rd SHLR.B Rd SLEEP STC CCR, Rd SUB.B Rs, Rd SUB.W Rs, Rd SUBS SUBX SUBS.W #1/2, Rd SUBX.B #xx:8, Rd SUBX.B Rs, Rd XOR XOR.B #xx:8, Rd XOR.B Rs, Rd XORC XORC #xx:8, CCR I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Stack Byte Data Word Data Internal Access M Operation N
Addr. Read Operation Access J K L
Notes: *1 n: Initial value in R4L. Source and destination are accessed n + 1 times each. *2 Data access requires 9 to 16 states.
303
Appendix B. Register Field
B.1 Register Addresses and Bit Names
Addr. (last Register byte) name Bit 7
H'80 H'81 H'82 H'83 H'84 H'85 H'86 H'87 H'88 H'89 H'8A H'8B H'8C H'8D H'8E H'8F H'90 H'91 H'92 H'93 H'94 H'95 H'96 H'97 H'98 H'99 H'9A H'9B H'9C H'9D H'9E H'9F TIER TCSR FRC (H) FRC (L) OCRA (H) OCRB (H) OCRA (L) OCRB (L) TCR TOCR ICRA (H) ICRA (L) ICRB (H) ICRB (L) ICRC (H) ICRC (L) ICRD (H) ICRD (L) IEDGA -- IEDGB -- IEDGC -- IEDGD OCRS BUFEA OEA BUFEB CKS1 OEB CKS0 OLVLA OLVLB ICIAE ICFA ICIBE ICFB ICICE ICFC ICIDE ICFD OCIAE OCFA OCIBE OVIE OCFB OVF -- CCLRA FRT
Bit 6
Bit 5
Bit names Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
Module
External addresses (in expanded modes)
Notes: FRT: Free-Running Timer
304
(Continued on next page)
(Continued from previous page) Addr. (last Register byte) name Bit 7 Bit 6
H'A0 H'A1 H'A2 H'A3 H'A4 H'A5 H'A6 H'A7 H'A8 H'A9 H'AA H'AB H'AC H'AD H'AE H'AF H'B0 H'B1 H'B2 H'B3 H'B4 H'B5 H'B6 H'B7 H'B8 H'B9 H'BA H'BB H'BC H'BD H'BE H'BF P1DDR P2DDR P1DR P2DR P3DDR P4DDR P3DR P4DR P5DDR P6DDR P5DR P6DR -- P8DDR P7DR P8DR P17DDR P27DDR P17 P27 P47DDR P37 P47 -- P67DDR -- P67 -- -- P77 -- TCR DTR TCNT -- TCR DTR TCNT -- -- -- -- OE -- OS OE OS
Bit 5
--
Bit names Bit 4 Bit 3
-- --
Bit 2
CKS2
Bit 1
CKS1
Bit 0
CKS0
Module
PWM0
-- --
-- --
-- --
-- CKS2
-- CKS1
-- CKS0 PWM1
--
--
--
--
--
-- External addresses (in expanded modes)
P16DDR P15DDR P14DDR P26DDR P25DDR P24DDR P16 P26 P15 P25 P14 P24
P13DDR P12DDRP1 1DDR P10DDR P23DDR P22DDRP21DDR P20DDR P13 P23 P12 P22 P11 P21 P10 P20
Port 1 Port 2 Port 1 Port 2 Port 3 Port 4 Port 3 Port 4 Port 5 Port 6 Port 5 Port 6 -- Port 8 Port 7 Port 8
P37DDR P36DDR P35DDR P34DDR P46DDR P45DDR P44DDR P36 P46 -- -- P66 -- P76 P86 P35 P45 -- -- P65 -- P75 P85 P34 P44 -- -- P64 -- P74 P84
P33DDR P32DDRP31DDR P30DDR P43DDR P42DDRP4 1DDR P40DDR P33 P43 -- -- P63 -- P73 P83 P32 P42 P31 P41 P30 P40
P52DDRP5 1DDR P50DDR P52 P62 -- P72 P82 P51 P61 -- P71 P81 P50 P60 -- P70 P80
P66DDR P65DDR P64DDR
P63DDR P62DDRP6 1DDR P60DDR
P86DDR P85DDR P84DDR
P83DDR P82DDRP81DDR P80DDR
(Continued on next page) Notes: PWM0: Pulse-Width Modulation timer channel 0 PWM1: Pulse-Width Modulation timer channel 1
305
(Continued from preceding page) Addr. (last Register byte) name Bit 7 Bit 6 Bit 5
H'C0 H'C1 H'C2 H'C3 H'C4 H'C5 H'C6 H'C7 H'C8 H'C9 H'CA H'CB H'CC H'CD H'CE H'CF H'D0 H'D1 H'D2 H'D3 H'D4 H'D5 H'D6 H'D7 H'D8 H'D9 H'DA H'DB H'DC H'DD H'DE H'DF P9DDR P9DR -- -- SYSCR MDCR ISCR IER TCR TCSR TCORA TCORB TCNT -- -- -- TCR TCSR TCORA TCORB TCNT -- -- -- SMR BRR SCR TDR SSR RDR -- -- -- -- -- -- -- -- TDRE RDRF ORER TIE RIE TE -- -- -- C/A -- -- -- CHR -- -- -- PE -- -- -- CMIEB CMFB -- -- -- CMIEA CMFA -- -- -- OVIE OVF P97 -- -- SSBY -- IRQ7SC IRQ7E CMIEB CMFB P96 -- -- STS2 -- IRQ6E CMIEA CMFA P95 -- -- STS1 -- IRQ5E OVIE OVF
Bit names Bit 4 Bit 3
P94 -- -- STS0 -- IRQ4E CCLR1 -- P93 -- -- -- -- IRQ3SC IRQ3E CCLR0 OS3
Bit 2
P92 -- -- --
Bit 1
P91 -- -- MDS1
Bit 0
P90 -- -- RAME MDS0 IRQ0E CKS0 OS0
Module
Port 9
P97DDR P96DDR P95DDR P94DDR
P93DDR P92DDRP91DDR P90DDR
NMIEG DPME
System control
IRQ6SC IRQ5SC IRQ4SC
IRQ2SC IRQ1SC IRQ0SC IRQ2E IRQ1E CKS2 OS2 CKS1 OS1 TMR0
-- -- -- CCLR1 --
-- -- -- CCLR0 OS3
-- -- -- CKS2 OS2
-- -- -- CKS1 OS1
-- -- -- CKS0 OS0 TMR1
-- -- -- O/E RE FER -- --
-- -- -- STOP -- PER -- --
-- -- -- -- -- -- -- --
-- -- -- CKS1 CKE1 -- -- --
-- -- -- CKS0 CKE0 -- -- -- SCI
(Continued on next page) Notes: TMR0: 8-Bit Timer channel 0 TMR1: 8-Bit Timer channel 1 SCI: Serial Communication Interface
306
(Continued from preceding page) Addr. (last Register byte) name Bit 7 Bit 6 Bit 5
H'E0 H'E1 H'E2 H'E3 H'E4 H'E5 H'E6 H'E7 H'E8 H'E9 H'EA H'EB H'EC H'ED H'EE H'EF H'F0 H'F1 H'F2 H'F3 H'F4 H'F5 H'F6 H'F7 H'F8 H'F9 H'FA H'FB H'FC H'FD H'FE H'FF ADDRA -- ADDRB -- ADDRC -- ADDRD -- -- ADCR -- -- -- -- -- PCCSR PCDR0 PCDR1 PCDR2 PCDR3 PCDR4 PCDR5 PCDR6 PCDR7 PCDR8 PCDR9 PCDR10 PCDR11 PCDR12 PCDR13 PCDR14 -- -- TRGE -- -- -- -- -- MWEF -- ADIE -- -- -- -- -- -- -- EMWI -- ADST -- -- -- -- -- -- -- SWEF -- -- -- -- -- -- -- -- --
Bit names Bit 4 Bit 3
-- -- -- -- SCAN -- -- -- -- -- -- -- EAKAR -- -- -- -- CKS -- -- -- -- -- -- -- MREF
Bit 2
-- -- -- -- CH2 -- -- -- -- -- -- -- EMRI
Bit 1
-- -- -- -- CH1 -- -- -- -- -- -- -- MWMF
Bit 0
-- -- -- -- CH0 -- -- -- -- -- -- -- SWMF
Module
A/D
ADCSR ADF
DPRAM
Note: A/D: Analog-to-Digital converter DPRAM: Dual-port RAM
307
308
TIER--Timer Interrupt Enable Register 7 ICIAE Initial value 0 Read/Write R/W Bit 6 ICIBE 0 R/W 5 ICICE 0 R/W
H'FF90 4 3 2 ICIDE OCIAE OCIBE 0 0 0 R/W R/W R/W 1 OVIE 0 R/W
FRT 0 -- 1 --
Overflow Interrupt Enable 0 Overflow interrupt request is disabled. 1 Overflow interrupt request is enabled. Output Compare Interrupt B Enable 0 Output compare interrupt request B is disabled. 1 Output compare interrupt request B is enabled. Output Compare Interrupt A Enable 0 Output compare interrupt request A is disabled. 1 Output compare interrupt request A is enabled. Input Capture Interrupt D Enable 0 Input capture interrupt request D is disabled. 1 Input capture interrupt request D is enabled. Input Capture Interrupt C Enable 0 Input capture interrupt request C is disabled. 1 Input capture interrupt request C is enabled. Input Capture Interrupt B Enable 0 Input capture interrupt request B is disabled. 1 Input capture interrupt request B is enabled. Input Capture Interrupt A Enable 0 Input capture interrupt request A is disabled. 1 Input capture interrupt request A is enabled.
309
TCSR--Timer Control/Status Register 7 6 ICFA ICFB Initial value 0 0 Read/Write R/(W)* R/(W)* Bit 5 ICFC 0 R/(W)*
H'FF91
FRT
4 3 2 1 0 ICFD OCFA OCFB OVF CCLRA 0 0 0 0 0 R/(W)* R/(W)* R/(W)* R/(W)* R/W Counter Clear A 0 FRC count is not cleared. 1 FRC count is cleared by compare-match A.
Timer Overflow Flag 0 Cleared when CPU reads OVF = "1," then writes "0" in OVF. 1 Set when FRC changes from H'FFFF to H'0000. Output Compare Flag B 0 Cleared when CPU reads OCFB = "1", then writes "0" in OCFB. 1 Set when FRC = OCRB. Output Compare Flag A 0 Cleared when CPU reads OCFA = "1", then writes "0" in OCFA. 1 Set when FRC = OCRA. Input Capture Flag D 0 Cleared when CPU reads ICFD = "1", then writes "0" in ICFD. 1 Set by FTID input. Input Capture Flag C 0 Cleared when CPU reads ICFC = "1", then writes "0" in ICFC. 1 Set by FTIC input. Input Capture Flag B 0 Cleared when CPU reads ICFB = "1", then writes "0" in ICFB. 1 Set when FTIB input causes FRC to be copied to ICRB. Input Capture Flag A 0 Cleared when CPU reads ICFA = "1", then writes "0" in ICFA. 1 Set when FTIA input causes FRC to be copied to ICRA. * Software can write a "0" in bits 7 to 1 to clear the flags, but cannot write a "1" in these bits
310
FRC (H and L)--Free-Running Counter Bit Initial value Read/Write 7 0 R/W 6 0 R/W 5 0 R/W 4 0 R/W 3
H'FF92, H'FF93 2 0 R/W 1 0 R/W
FRT 0 0 R/W
0 R/W
Count value
OCRA (H and L)--Output Compare Register A Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FF94, H'FF95 2 1 R/W 1 1 R/W
FRT 0 1 R/W
1 R/W
Continually compared with FRC. OCFA is set to "1" when OCRA = FRC.
OCRB (H and L)--Output Compare Register B Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FF94, H'FF95 2 1 R/W 1 1 R/W
FRT 0 1 R/W
1 R/W
Continually compared with FRC. OCFB is set to "1" when OCRB = FRC.
311
TCR--Timer Control Register 7 6 IEDGA IEDGB Initial value 0 0 Read/Write R/W R/W Bit 5 IEDGC 0 R/W
H'FF96 4 3 2 IEDGD BUFEA BUFEB 0 0 0 R/W R/W R/W 1 CKS1 0 R/W
FRT 0 CKS0 0 R/W
Clock Select 0 0 Internal clock source: O/2 0 1 Internal clock source: O/8 1 0 Internal clock source: O/32 1 1 External clock source: counted on rising edge Buffer Enable B 0 ICRD is used for input capture D. 1 ICRD is buffer register for input capture B. Buffer Enable A 0 ICRC is used for input capture C. 1 ICRC is buffer register for input capture A. Input Edge Select D 0 Falling edge of FTID is valid. 1 Rising edge of FTID is valid. Input Edge Select C 0 Falling edge of FTIC is valid. 1 Rising edge of FTIC is valid. Input Edge Select B 0 Falling edge of FTIB is valid. 1 Rising edge of FTIB is valid. Input Edge Select A 0 Falling edge of FTIA is valid. 1 Rising edge of FTIA is valid.
312
TOCR--Timer Output Control Register Bit Initial value Read/Write 7 -- 1 -- 6 -- 1 -- 5 -- 1 -- 4 OCRS 0 R/W
H'FF97 3 OEA 0 R/W 2 OEB 0 R/W
FRT 1 0 OLVLA OLVLB 0 0 R/W R/W
Output Level B 0 Compare-match B causes "0" output. 1 Compare-match B causes "1" output. Output Level A 0 Compare-match A causes "0" output. 1 Compare-match A causes "1" output. Output Enable B 0 Output compare B output is disabled. 1 Output compare B output is enabled. Output Enable A 0 Output compare A output is disabled. 1 Output compare A output is enabled. Output Compare Register Select 0 The CPU can access OCRA at addresses H'FF94 - H'FF95. 1 The CPU can access OCRB at addresses H'FF94 - H'FF95.
ICRA (H and L)--Input Capture Register Bit Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R
H'FF98, H'FF99 2 0 R 1 0 R
FRT 0 0 R
Contains FRC count captured on FTIA input.
313
ICRB (H and L)--Input Capture Register Bit Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R
H'FF9A, H'FF9B 2 0 R 1 0 R
FRT 0 0 R
Contains FRC count captured on FTIB input.
ICRC (H and L)--Input Capture Register Bit Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R
H'FF9C, H'FF9D 2 0 R 1 0 R
FRT 0 0 R
Contains FRC count captured on FTIC input, or old ICRA value in buffer mode.
ICRD (H and L)--Input Capture Register Bit Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R
H'FF9E, H'FF9F 2 0 R 1 0 R
FRT 0 0 R
Contains FRC count captured on FTID input, or old ICRB value in buffer mode.
314
TCR--Timer Control Register Bit Initial value Read/Write 7 OE 0 R/W 6 OS 0 R/W 5 -- 1 -- 4 -- 1 -- Clock Select
Internal
H'FFA0 3 -- 1 -- 2 CKS2 0 R/W 1 CKS1 0 R/W
PWM0 0 CKS0 0 R/W
(Values When O = 10MHz)
ResoPWM period PWM frequency
clock Freq. lution
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 O/2 200ns 50s 20kHz 1 O/8 800ns 200s 5kHz 0 O/32 3.2s 800s 1.25kHz 1 O/128 12.8s 3.2ms 312.5Hz 0 O/256 25.6s 6.4ms 156.3Hz 1 O/1024 102.4s 25.6ms 39.1Hz 0 O/2048 204.8s 51.2ms 19.5Hz 1 O/4096 409.6s 102.4ms 9.8Hz
Output Select 0 Positive logic 1 Negative logic Output Enable 0 PWM output disabled; TCNT cleared to H'00 and stops. 1 PWM output enabled; TCNT runs.
DTR--Duty Register Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFA1 2 1 R/W 1 1 R/W
PWM0 0 1 R/W
1 R/W
Pulse duty factor
315
TCNT--Timer Counter Bit Initial value Read/Write 7 0 R/W 6 0 R/W 5 0 R/W 4 0 R/W 3
H'FFA2 2 0 R/W 1 0 R/W
PWM0 0 0 R/W
0 R/W
Count value (runs from H'00 to H'F9, then repeats from H'00)
TCR--Timer Control Register Bit Initial value Read/Write 7 OE 0 R/W 6 OS 0 R/W 5 -- 1 -- 4 -- 1 -- 3 -- 1 --
H'FFA4 2 CKS2 0 R/W 1 CKS1 0 R/W
PWM1 0 CKS0 0 R/W
Note: Bit functions are the same as for PWM0.
DTR--Duty Register Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFA5 2 1 R/W 1 1 R/W
PWM1 0 1 R/W
1 R/W
Note: Bit functions are the same as for PWM0.
316
TCNT--Timer Counter Bit Initial value Read/Write 7 0 R/W 6 0 R/W 5 0 R/W 4 0 R/W 3
H'FFA6 2 0 R/W 1 0 R/W
PWM1 0 0 R/W
0 R/W
Note: Bit functions are the same as for PWM0.
P1DDR--Port 1 Data Direction Register Bit Mode 1 Initial value Read/Write Modes 2 and 3 Initial value Read/Write 7 6 5 4 3
H'FFB0 2 1
Port 1 0
P17DDR P16DDR
P15DDR P14DDR P13DDR P12DDR P11DDR P10DDR
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
Port 1 Input/Output Control 0 Input port 1 Output port
P1DR--Port 1 Data Register Bit Initial value Read/Write 7 P17 0 R/W 6 P16 0 R/W 5 P15 0 R/W 4 P14 0 R/W
H'FFB2 3 P13 0 R/W 2 P12 0 R/W 1 P11 0 R/W
Port 1 0 P10 0 R/W
317
P2DDR--Port 2 Data Direction Register Bit Mode 1 Initial value Read/Write Modes 2 and 3 Initial value Read/Write 7 6 5 4 3
H'FFB1 2 1
Port 2 0
P27DDR P26DDR
P25DDR P24DDR P23DDR P22DDR P21DDR P20DDR
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
1 -- 0 W
Port 2 Input/Output Control 0 Input port 1 Output port
P2DR--Port 2 Data Register Bit Initial value Read/Write 7 P27 0 R/W 6 P26 0 R/W 5 P25 0 R/W 4 P24 0 R/W
H'FFB3 3 P23 0 R/W 2 P22 0 R/W 1 P21 0 R/W
Port 2 0 P20 0 R/W
P3DDR--Port 3 Data Direction Register Bit Initial value Read/Write 7 0 W 6 0 W 5 0 W 4 0 W 3 0 W
H'FFB4 2 0 W 1 0 W
Port 3 0 0 W
P37DDR P36DDR
P35DDR P34DDR P33DDR P32DDR P31DDR P30DDR
Port 3 Input/Output Control 0 Input port 1 Output port
318
P3DR--Port 3 Data Register Bit Initial value Read/Write 7 P37 0 R/W 6 P36 0 R/W 5 P35 0 R/W 4 P34 0 R/W
H'FFB6 3 P33 0 R/W 2 P32 0 R/W 1 P31 0 R/W
Port 3 0 P30 0 R/W
P4DDR--Port 4 Data Direction Register Bit Initial value Read/Write 7 0 W 6 0 W 5 0 W 4 0 W 3 0 W
H'FFB5 2 0 W 1 0 W
Port 4 0 0 W
P47DDR P46DDR
P45DDR P44DDR P43DDR P42DDR P41DDR P40DDR
Port 4 Input/Output Control 0 Input port 1 Output port
P4DR--Port 4 Data Register Bit Initial value Read/Write 7 P47 0 R/W 6 P46 0 R/W 5 P45 0 R/W 4 P44 0 R/W
H'FFB7 3 P43 0 R/W 2 P42 0 R/W 1 P41 0 R/W
Port 4 0 P40 0 R/W
P5DDR--Port 5 Data Direction Register Bit Initial value Read/Write 7
--
H'FFB8 4
--
Port 5 1 0 W 0 0 W
6
--
5
--
3
--
2 0 W
P52DDR P51DDR P50DDR
1
--
1
--
1
--
1
--
1
--
Port 5 Input/Output Control 0 Input port 1 Output port
319
P5DR--Port 5 Data Register Bit Initial value Read/Write 7 -- 1 -- 6 -- 1 -- 5 -- 1 -- 4 -- 1 -- 3 -- 1 --
H'FFBA 2 P52 0 R/W 1 P51 0 R/W
Port 5 0 P50 0 R/W
P6DDR--Port 6 Data Direction Register Bit Initial value Read/Write 7 0 W 6 0 W 5 0 W 4 0 W 3 0 W
H'FFB9 2 0 W 1 0 W
Port 6 0 0 W
P67DDR P66DDR
P65DDR P64DDR P63DDR P62DDR P61DDR P60DDR
Port 6 Input/Output Control 0 Input port 1 Output port
P6DR--Port 6 Data Register Bit Initial value Read/Write 7 P67 0 R/W 6 P66 0 R/W 5 P65 0 R/W 4 P64 0 R/W
H'FFBB 3 P63 0 R/W 2 P62 0 R/W 1 P61 0 R/W
Port 6 0 P60 0 R/W
P7DR--Port 7 Data Register Bit Initial value Read/Write 7 P77 * R 6 P76 * R 5 P75 * R 4 P74 * R
H'FFBE 3 P73 * R 2 P72 * R 1 P71 * R
Port 7 0 P70 * R
* Depends on the levels of pins P77 to P70.
320
P8DDR--Port 8 Data Direction Register Bit 7
--
H'FFBD 4 3 2 1
Port 8 0
6
P86DDR
5
P85DDR P84DDR P83DDR P82DDR P81DDR P80DDR
Initial value Modes 1 and 2 1 Mode 3 1 Read/Write --
0 0 W
0 0 W
0 0 W
0 0 W
0 0 W
0 0 W
1 0 W
Port 8 Input/Output Control 0 Input port 1 Output port
P8DR--Port 8 Data Register Bit Initial value Read/Write 7 -- 1 -- 6 P86 0 R/W 5 P85 0 R/W 4 P84 0 R/W
H'FFBF 3 P83 0 R/W 2 P82 0 R/W 1 P81 0 R/W
Port 8 0 P80 0 R/W
P9DDR--Port 9 Data Direction Register Bit Modes 1 and 2 Initial value Read/Write Mode 3 Initial value Read/Write 7 6 5 4 3
H'FFC0 2 1
Port 9 0
P97DDR P96DDR
P95DDR P94DDR P93DDR P92DDR P91DDR P90DDR
0 W 0 W
1 -- 0 W
0 W 0 W
0 W 0 W
0 W 0 W
0 W 0 W
0 W 0 W
0 W 0 W
Port 9 Input/Output Control 0 Input port 1 Output port
321
P9DR--Port 9 Data Register Bit Initial value Read/Write 7 P97 0 R/W 6 P96 0 R/W 5 P95 0 R/W 4 P94 0 R/W
H'FFC1 3 P93 0 R/W 2 P92 0 R/W 1 P91 0 R/W
Port 9 0 P90 0 R/W
SYSCR--System Control Register Bit Initial value Read/Write 7 SSBY 0 R/W 6 STS2 0 R/W 5 STS1 0 R/W 4 STS0 0 R/W
H'FFC4 3 -- 1 --
System Control 2 1 NMIEG DPME 0 0 R/W R/W 0 RAME 1 R/W
RAM Enable 0 On-chip RAM is disabled. 1 On-chip RAM is enabled. Dual-Port RAM Enable 0 Dual-port RAM is disabled. 1 (1) Single-chip mode: dual-port RAM is enabled. (2) Expanded modes: no effect NMI Edge 0 Falling edge of NMI is detected. 1 Rising edge of NMI is detected. Standby Timer Select 0 0 0 Clock settling time = 8192 states 0 0 1 Clock settling time = 16384 states 0 1 0 Clock settling time = 32768 states 0 1 1 Clock settling time = 65536 states 1 - - Clock settling time = 131072 states Software Standby 0 SLEEP instruction causes transition to sleep mode. 1 SLEEP instruction causes transition to software standby mode.
322
MDCR--Mode Control Register Bit Initial value Read/Write 7 -- 1 -- 6 -- 1 -- 5 -- 1 -- 4 -- 0 --
H'FFC5 3 -- 0 -- 2 -- 1 --
System Control 1 MDS1 * R 0 MDS0 * R
Mode Select Bits Value at mode pins. * Determined by inputs at pins MD1 and MD0. ISCR--IRQ Sense Control Register Bit H'FFC6 System Control
7 6 5 4 3 2 1 0 IRQ7SC IRQ6SC IRQ5SC IRQ4SC IRQ3SC IRQ2SC IRQ1SC IRQ0SC Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W IRQ0 to IRQ7 Sense Control 0 IRQi is level-sensed (active Low). 1 IRQi is edge-sensed (falling edge). IER--IRQ Enable Register Bit 7 IRQ7E Initial value 0 Read/Write R/W 6 IRQ6E 0 R/W 5 IRQ5E 0 R/W 4 IRQ4E 0 R/W H'FFC7 3 IRQ3E 0 R/W 2 IRQ2E 0 R/W System Control 1 IRQ1E 0 R/W 0 IRQ0E 0 R/W
IRQ0 to IRQ7 Enable 0 IRQi is disabled. 1 IRQi is enabled.
323
TCR--Timer Control Register 7 6 CMIEB CMIEA Initial value 0 0 Read/Write R/W R/W Bit 5 OVIE 0 R/W
H'FFC8 4 3 CCLR1 CCLR0 0 0 R/W R/W 2 CKS2 0 R/W 1 CKS1 0 R/W
TMR0 0 CKS0 0 R/W
Clock Select 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 No clock source; timer stops. Internal clock source: O/8, counted on falling edge. Internal clock source: O/64, counted on falling edge. Internal clock source: O/1024, counted on falling edge. No clock source; timer stops. External clock source, counted on rising edge. External clock source, counted on falling edge. External clock source, counted on both rising and falling edges.
Counter Clear 0 0 Counter is not cleared. 0 1 Cleared by compare-match A. 1 0 Cleared by compare-match B. 1 1 Cleared on rising edge of external reset input. Timer Overflow Interrupt Enable 0 Overflow interrupt request is disabled. 1 Overflow interrupt request is enabled. Compare-Match Interrupt Enable A 0 Compare-match A interrupt request is disabled. 1 Compare-match A interrupt request is enabled. Compare-Match Interrupt Enable B 0 Compare-match B interrupt request is disabled. 1 Compare-match B interrupt request is enabled.
324
TCSR--Timer Control/Status Register 7 6 5 CMFB CMFA OVF Initial value 0 0 0 Read/Write R/(W)*1 R/(W)*1 R/(W)*1 Bit 4 -- 1 --
H'FFC9 3 OS3*2 0 R/W 2 OS2*2 0 R/W 1 OS1*2 0 R/W
TMR0 0 OS0*2 0 R/W
Output Select 0 0 No change on compare-match A. 0 1 Output "0" on compare-match A. 1 0 Output "1" on compare-match A. 1 1 Invert (toggle) output on compare-match A. Output Select 0 0 No change on compare-match B. 0 1 Output "0" on compare-match B. 1 0 Output "1" on compare-match B. 1 1 Invert (toggle) output on compare-match B. Timer Overflow Flag 0 Cleared when CPU reads OVF = "1," then writes "0" in OVF. 1 Set when TCNT changes from H'FF to H'00. Compare-Match Flag A 0 Cleared when CPU reads CMFA = "1," then writes "0" in CMFA. 1 Set when TCNT = TCORA. Compare-Match Flag B 0 Cleared from when CPU reads CMFB = "1," then writes "0" in CMFB. 1 Set when TCNT = TCORB. *1 Software can write a "0" in bits 7 to 5 to clear the flags, but cannot write a "1" in these bits. *2 When all four bits (OS3 to OS0) are cleared to "0," output is disabled.
325
TCORA--Time Constant Register A Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFCA 2 1 R/W 1 1 R/W
TMR0 0 1 R/W
1 R/W
The CMFA bit is set to "1" when TCORA = TCNT.
TCORB--Time Constant Register B Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFCB 2 1 R/W 1 1 R/W
TMR0 0 1 R/W
1 R/W
The CMFB bit is set to "1" when TCORB = TCNT.
TCNT--Timer Counter Bit Initial value Read/Write 7 0 R/W 6 0 R/W 5 0 R/W 4 0 R/W 3
H'FFCC 2 0 R/W 1 0 R/W
TMR0 0 0 R/W
0 R/W
Count value
TCR--Timer Control Register 7 6 CMIEB CMIEA Initial value 0 0 Read/Write R/W R/W Bit 5 OVIE 0 R/W
H'FFD0 4 3 CCLR1 CCLR0 0 0 R/W R/W 2 CKS2 0 R/W 1 CKS1 0 R/W
TMR1 0 CKS0 0 R/W
Note: Bit functions are the same as for TMR0.
326
TCSR--Timer Control/Status Register 7 6 5 CMFB CMFA OVF Initial value 0 0 0 Read/Write R/(W)*1 R/(W)*1 R/(W)*1 Bit 4 -- 1 --
H'FFD1 3 OS3*2 0 R/W 2 OS2*2 0 R/W 1 OS1*2 0 R/W
TMR1 0 OS0*2 0 R/W
Note: Bit functions are the same as for TMR0. *1 Software can write a "0" in bits 7 to 5 to clear the flags, but cannot write a "1" in these bits. *2 When all four bits (OS3 to OS0) are cleared to "0," output is disabled.
TCORA--Time Constant Register A Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFD2 2 1 R/W 1 1 R/W
TMR1 0 1 R/W
1 R/W
Note: Bit functions are the same as for TMR0.
TCORB--Time Constant Register B Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFD3 2 1 R/W 1 1 R/W
TMR1 0 1 R/W
1 R/W
Note: Bit functions are the same as for TMR0.
TCNT--Timer Counter Bit Initial value Read/Write 7 0 R/W 6 0 R/W 5 0 R/W 4 0 R/W 3
H'FFD4 2 0 R/W 1 0 R/W
TMR1 0 0 R/W
0 R/W
Note: Bit functions are the same as for TMR0.
327
SMR--Serial Mode Register Bit Initial value Read/Write 7 C/A 0 R/W 6 CHR 0 R/W 5 PE 0 R/W 4 O/E 0 R/W
H'FFD8 3 STOP 0 R/W 2 -- 1 -- 1 CKS1 0 R/W
SCI 0 CKS0 0 R/W
Clock Select 0 0 O clock 0 1 O/4 clock 1 0 O/16 clock 1 1 O/64 clock Stop Bit Length 0 One stop bit 1 Two stop bits Parity Mode 0 Even parity 1 Odd parity Parity Enable 0 Transmit: No parity bit added. Receive: Parity bit not checked. 1 Transmit: Parity bit added. Receive: Parity bit checked. Character Length 0 8-Bit data length 1 7-Bit data length Communication Mode 0 Asynchronous 1 Synchronous
328
BRR--Bit Rate Register Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFD9 2 1 R/W 1 1 R/W
SCI 0 1 R/W
1 R/W
Constant that determines the bit rate
SCR--Serial Control Register Bit Initial value Read/Write 7 TIE 0 R/W 6 RIE 0 R/W 5 TE 0 R/W 4 RE 0 R/W 3 -- 1 --
H'FFDA 2 -- 1 -- 1 CKE1 0 R/W
SCI 0 CKE0 0 R/W
Clock Enable 0 0 Asynchronous serial clock not output 1 Asynchronous serial clock output at ASCK pin Clock Enable 1 0 Internal clock 1 External clock, input at ASCK or CSCK pin Receive Enable 0 Receive disabled 1 Receive enabled Transmit Enable 0 Transmit disabled 1 Transmit enabled Receive Interrupt Enable 0 Receive interrupt request (RxI) is disabled. 1 Receive interrupt request (RxI) is enabled. Transmit Interrupt Enable 0 Transmit interrupt request (TxI) is disabled. 1 Transmit interrupt request (TxI) is enabled.
329
TDR--Transmit Data Register Bit Initial value Read/Write 7 1 R/W 6 1 R/W 5 1 R/W 4 1 R/W 3
H'FFDB 2 1 R/W 1 1 R/W
SCI 0 1 R/W
1 R/W
Transmit data
330
SSR--Serial Status Register Bit 7 6 TDRE RDRF Initial value 1 0 Read/Write R/(W)* R/(W)* 5 ORER 0 R/(W)*
H'FFDC 4 3 FER PER 0 0 R/(W)* R/(W)* 2 -- 1 -- 1 -- 1 --
SCI 0 -- 1 --
Parity Error 0 Cleared when CPU reads PER = "1," then writes "0" in PER. 1 Set when a parity error occurs (parity of receive data does not match parity selected by O/E bit). Framing Error 0 Cleared when CPU reads FER = "1," then writes "0" in FER. 1 Set when a framing error occurs (stop bit is "0"). Overrun Error 0 Cleared when CPU reads ORER = "1," then writes "0" in ORER. 1 Set when an overrun error occurs (next data is completely received while RDRF bit is set to "1"). Receive Data Register Full 0 Cleared when CPU reads RDRF = "1," then writes "0" in RDRF. 1 Set when one character is received normally and transferred from RSR to RDR. Transmit Data Register Empty 0 Cleared when CPU reads TDRE = "1," then writes "0" in TDRE 1 Set when: 1. Data is transferred from TDR to TSR. 2. TE is cleared while TDRE = "0." * Software can write a "0" in bits 7 to 3 to clear the flags, but cannot write a "1" in these bits.
RDR--Receive Data Register Bit Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R
H'FFDD 2 0 R 1 0 R
SCI 0 0 R
Receive data
331
ADDRn--A/D Data Register n (n = A, B, C, D) H'FFE0, H'FFE2, H'FFE4, H'FFE6 Bit Initial value Read/Write 7 0 R 6 0 R 5 0 R 4 0 R 3 0 R 2 0 R 1 0 R
A/D
0 0 R
A/D conversion result Note: The least significant bit of the register address is ignored.
332
ADCSR--A/D Control/Status Register 7 ADF Initial value 0 Read/Write R/(W)* Bit 6 ADIE 0 R/W 5 ADST 0 R/W 4 SCAN 0 R/W
H'FFE8 3 CKS 0 R/W 2 CH2 0 R/W 1 CH1 0 R/W
A/D 0 CH0 0 R/W
Channel Select CH2 CH1 CH0 0 0 0 0 1 1 0 1 1 1 0 0 0 1 1 0 1 1
Single mode AN0 AN1 AN2 AN3 AN4 AN5 AN6 AN7
Scan mode AN0 AN0, AN1 AN0 to AN2 AN0 to AN3 AN4 AN4, AN5 AN4 to AN6 AN4 to AN7
Clock Select 0 Conversion time = 242 states (max) 1 Conversion time = 122 states (max) Scan Mode 0 Single mode 1 Scan mode A/D Start 0 A/D conversion is halted. 1 1. Single mode: One A/D conversion is performed, then this bit is automatically cleared to "0." 2. Scan mode: A/D conversion starts and continues cyclically on all selected channels until "0" is written in this bit. A/D Interrupt Enable 0 The A/D interrupt request (ADI) is disabled. 1 The A/D interrupt request (ADI) is enabled. A/D End Flag 0 Cleared from "1" to "0" when CPU reads ADF = "1," then writes "0" in ADF. 1 Set to "1" at the following times: 1. Single mode: at the completion of A/D conversion 2. Scan mode: when all selected channels have been converted. * Software can write a "0" in bit 7 to clear the flag, but cannot write a "1" in this bit.
333
ADCR--A/D Control Register
H'FFEA or H'FFEB
A/D
7 TRGE Initial value 0 Read/Write R/W
Bit
6 -- 1 --
5 -- 1 --
4 -- 1 --
3 -- 1 --
2 -- 1 --
1 -- 1 --
0 -- 1 --
Trigger Enable 0 ADTRG is disabled. 1 ADTRG is enabled. A/D conversion can be started by external trigger, or by software.
334
PCCSR--Parallel Communication Control/Status Register 7 MWEF Initial value 0 Read/Write H8/300 CPU: R Master CPU: R Bit 6 EMWI 0 R/W R 5 SWEF 0 R R 4 3 EAKAR MREF 0 0 R/W R/W R R
H'FFF0 2 EMRI 0 R/W R
DPRAM
1 0 MWMF SWMF 0 0 R R R R
Master Write End Flag 0 H8/300 CPU has read PCDR14 while MWMF = "1." 1 Master CPU has written data in PCDR14. Enable Master Write Interrupt 0 Master write end interrupt (MWEI) is disabled. 1 Master write end interrupt (MWEI) is enabled. Slave Write End Flag 0 Master CPU has read PCDR14. 1 H8/300 CPU has written data in PCDR14. Enable Acknowledge and Request 0 RDY output is disabled. Remains in high-impedance state. 1 RDY output is enabled. Master Read End Flag 0 Cleared when H8/300 CPU reads or writes PCDR0, or master CPU writes to PCDR0. 1 Set when master CPU reads PCDR0. Enable Master Read Interrupt 0 Master read end interrupt (MREI) is disabled. 1 Master read end interrupt (MREI) is enabled. Master Write Mode Flag 0 Not master write mode. Cleared when H8/300 CPU reads PCDR0. 1 Master write mode. Set if the master CPU writes to PCDR0 while SWMF = "0." Slave Write Mode Flag 0 Not slave write mode. Cleared when master CPU reads PCDR0. 1 Slave write mode. Set if H8/300 CPU writes to PCDR0 while MWMF = "0."
335
PCDR0A--Parallel Communication Data Register 0A Bit 7 6 -- R W 5 -- R W 4 -- R W 3 -- R W
H'FFF1 2 -- R W H'FFF1 2 -- W R 1 -- W R 1 -- R W
DPRAM 0 -- R W DPRAM 0 -- W R
Initial value -- Read/Write H8/300 CPU: R Master CPU: W
PCDR0B--Parallel Communication Data Register 0B Bit 7 6 -- W R 5 -- W R 4 -- W R 3 -- W R
Initial value -- Read/Write H8/300 CPU: W Master CPU: R
PCDR1 to PCDR14--Parallel Communication Data Registers 1 to 14 H'FFF2 - H'FFFF Bit 7 6 -- R/W R/W 5 -- R/W R/W 4 -- R/W R/W 3 -- R/W R/W 2 -- R/W R/W 1 -- R/W R/W
DPRAM 0 -- R/W R/W
Initial value -- Read/Write H8/300 CPU:R/W Master CPU: R/W
336
Appendix C. Pin States
C.1 Pin States in Each Mode
Table C-1. Pin States Pin name P17 - P10 A7 - A0 MCU mode 1 2 Hardware standby 3-State Software standby Low Low if DDR = 1, Prev. state if DDR = 0 Prev. state Low Low if DDR = 1, Prev. state if DDR = 0 Prev. state 3-state Prev. state Prev. state (note 3) Prev. state (note 3) Prev. state (note 3) 3-State Sleep mode Prev. state (Addr. output pins: last address accessed) Prev. state (Addr. output pins: last address accessed) 3-State Prev. state Prev. state Normal operation Addr. output Addr. output or input port
Reset Low 3-State
P27 - P20 A15 - A8
3 1 2
Low 3-State
3-State
I/O port Addr. output Addr. output or input port
P37 - P30 D7 - D0 P47 - P40,
P52 - P50,
P67 - P60,
P77 - P70,
P86 - P81,
3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
3-State
3-State
I/O port D7 - D0 I/O port I/O port
3-State
3-State
3-State
3-State
Prev. state
I/O port
3-State
3-State
Prev. state
I/O port
3-State
3-State
3-State
Input port
3-State
3-State
Prev. state (note 3)
Prev. state
I/O port
337
Table C-1. Pin States (cont.) Pin name P80/E MCU mode 1 2 Hardware standby 3-State Software standby Low if DDR = 1, 3-state if DDR = 0 Prev. state 3-State Prev. state High High if DDR = 1, 3-state if DDR = 0 High Prev. state Prev. state Sleep mode E clock if DDR = 1, 3-state if DDR = 0 Prev. state 3-State Prev. state Clock output Clock output if DDR = 1, 3-state if DDR = 0 High Prev. state Prev. state Normal operation E clock if DDR = 1, 3-state if DDR = 0 I/O port WAIT I/O port Clock output Clock output if DDR = 1, input port if DDR = 0 AS, WR, RD I/O port I/O port
Reset E clock output
P97/WAIT
P96/O
3 1 2 3 1 2 3
3-State 3-State
3-State
Clock output 3-State
3-state
P95 - P93, AS, WR, RD P92 - P90,
1 2 3 1 2 3
High 3-State 3-State
3-State
3-State
Notes: 1. 3-state: High-impedance state 2. Prev. state: Previous state. Input ports are in the high-impedance state (with the MOS pull-up on if DDR = 0 and DR = 1). Output ports hold their previous output level. 3. On-chip supporting modules are initialized, so these pins revert to I/O ports according to the DDR and DR bits. 4. I/O port: Direction depends on the data direction (DDR) bit. Note that these pins may also be used by the on-chip supporting modules. See section 5, "I/O Ports" for further information.
338
Appendix D. Timing of Transition to and Recovery From Hardware Standby Mode
Timing of Transition to Hardware Standby Mode (1). To retain RAM contents, drive the RES signal low 10 system clock cycles before the STBY signal goes low, as shown below. RES must remain low until STBY goes low (minimum delay from STBY low to RES high: 0 ns).
STBY t 1 10 t cyc RES t 2 0 ns
(2). When it is not necessary to retain RAM contents, RES does not have to be driven low as in (1). Timing of Recovery From Hardware Standby Mode: Drive the RES signal low approximately 100 ns before STBY goes high.
STBY t = 100 ns t OSC
RES
339
Appendix E. Package Dimensions
Figure E-1 shows the dimensions of the CG-84 package. Figure E-2 shows the dimensions of the CP-84 package. Figure E-3 shows the dimensions of the FP-80A package. Unit: mm
29.21 0.38
d
12 11
32 33 0.635 53
1 84 75 74 2.16 1.27 54
Figure E-1. Package Dimensions (CG-84) Unit: mm
30.23 0.12 29.28 74 75 54 53
30.23 0.12
84 1
11 12 32
4.03 Max 1.27
33 4.40 0.20
0.75
0.42 0.10
2.55 0.15
1.27
28.20 0.50
28.20 0.50
0.10
Unit: mm
17.2 0.3
14.0
60 61 17.2 0.3
41 40 0.65
80 1
0.30 0.10
21 20
+0.20 -0.16
0.12 M
3.05 Max
+0.08 -0.05
2.70
1.60
0.17
0-5
0.10
0.10
0.80 0.30
Figure E-3. Package Dimensions (FP-80A)


▲Up To Search▲   

 
Price & Availability of HD6433308

All Rights Reserved © IC-ON-LINE 2003 - 2022  
[Add Bookmark] [Contact Us] [Link exchange] [Privacy policy]
Mirror Sites :  [www.datasheet.hk]   [www.maxim4u.com]  [www.ic-on-line.cn] [www.ic-on-line.com] [www.ic-on-line.net] [www.alldatasheet.com.cn] [www.gdcy.com]  [www.gdcy.net]
 . . . . .
  We use cookies to deliver the best possible web experience and assist with our advertising efforts. By continuing to use this site, you consent to the use of cookies. For more information on cookies, please take a look at our Privacy Policy. X