 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| MC68HC705J1A MC68HRC705J1A MC68HSC705J1A MC68HSR705J1A Technical Data M68HC05 Microcontrollers MC68HC705J1A/D Rev. 4, 5/2002 WWW.MOTOROLA.COM/SEMICONDUCTORS MC68HC705J1A MC68HRC705J1A MC68HSC705J1A MC68HSR705J1A Technical Data To provide the most up-to-date information, the revision of our documents on the World Wide Web will be the most current. Your printed copy may be an earlier revision. To verify you have the latest information available, refer to: http://www.motorola.com/semiconductors/ The following revision history table summarizes changes contained in this document. For your convenience, the page number designators have been linked to the appropriate location. Motorola and the Stylized M Logo are registered trademarks of Motorola, Inc. digital dna is a trademark of Motorola, Inc. (c) Motorola, Inc., 2002 MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data 3 Technical Data Revision History Date Revision Level Description Figure 2-2. I/O Register Summary -- Corrected reset state for last entry (Mask Option Register) May, 2002 4.0 Figure 2-4. Mask Option Register (MOR) -- Corrected reset state 6.3.3 Pulldown Register A -- Corrected note 6.4.3 Pulldown Register B -- Corrected note Page Number(s) 37 41 91 94 Technical Data 4 MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A List of Sections Section 1. General Description . . . . . . . . . . . . . . . . . . . . 21 Section 2. Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Section 3. Central Processor Unit (CPU) . . . . . . . . . . . . 45 Section 4. Resets and Interrupts . . . . . . . . . . . . . . . . . . . 69 Section 5. Low-Power Modes. . . . . . . . . . . . . . . . . . . . . . 79 Section 6. Parallel Input/Output (I/O) Ports . . . . . . . . . . 87 Section 7. Computer Operating Properly (COP) Module . . . . . . . . . . . . . . . . . . . . . . . . . 97 Section 8. External Interrupt Module (IRQ). . . . . . . . . . 101 Section 9. Multifunction Timer Module . . . . . . . . . . . . . 109 Section 10. Electrical Specifications. . . . . . . . . . . . . . . 117 Section 11. Mechanical Specifications . . . . . . . . . . . . . 131 Section 12. Ordering Information . . . . . . . . . . . . . . . . . 135 Appendix A. MC68HRC705J1A . . . . . . . . . . . . . . . . . . . 137 Appendix B. MC68HSC705J1A . . . . . . . . . . . . . . . . . . . 141 Appendix C. MC68HSR705J1A . . . . . . . . . . . . . . . . . . . 145 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 MC68HC705J1A -- Rev. 4.0 MOTOROLA List of Sections Technical Data 5 List of Sections Technical Data 6 List of Sections MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Table of Contents Section 1. General Description 1.1 1.2 1.3 1.4 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Programmable Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1.5 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1.5.1 VDD and VSS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1.5.2 OSC1 and OSC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 1.5.2.1 Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 1.5.2.2 Ceramic Resonator Oscillator . . . . . . . . . . . . . . . . . . . . . 28 1.5.2.3 RC Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 1.5.2.4 External Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 1.6 1.7 1.8 1.9 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 IRQ/VPP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 PA0-PA7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 PB0-PB5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Section 2. Memory 2.1 2.2 2.3 2.4 2.5 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Input/Output Register Summary . . . . . . . . . . . . . . . . . . . . . . . .35 RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 MC68HC705J1A -- Rev. 4.0 MOTOROLA Table of Contents Technical Data 7 Table of Contents 2.6 EPROM/OTPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 2.6.1 EPROM/OTPROM Programming . . . . . . . . . . . . . . . . . . . . . 38 2.6.2 EPROM Programming Register . . . . . . . . . . . . . . . . . . . . . 39 2.6.3 EPROM Erasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 2.7 2.8 Mask Option Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 EPROM Programming Characteristics . . . . . . . . . . . . . . . . . . . 43 Section 3. Central Processor Unit (CPU) 3.1 3.2 3.3 3.4 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 CPU Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Arithmetic/Logic Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 3.5 CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.1 Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.2 Index Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.3 Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 3.5.4 Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 3.5.5 Condition Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 3.6 Instruction Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 3.6.1 Addressing Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3.6.1.1 Inherent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 3.6.1.2 Immediate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3.6.1.3 Direct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.4 Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.5 Indexed, No Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.6 Indexed, 8-Bit Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.7 Indexed, 16-Bit Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 3.6.1.8 Relative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 3.6.2 Instruction Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 3.6.2.1 Register/Memory Instructions . . . . . . . . . . . . . . . . . . . . . 55 3.6.2.2 Read-Modify-Write Instructions . . . . . . . . . . . . . . . . . . . . 56 3.6.2.3 Jump/Branch Instructions . . . . . . . . . . . . . . . . . . . . . . . .57 3.6.2.4 Bit Manipulation Instructions . . . . . . . . . . . . . . . . . . . . . . 59 3.6.2.5 Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Technical Data 8 Table of Contents MC68HC705J1A -- Rev. 4.0 MOTOROLA Table of Contents 3.7 3.8 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Section 4. Resets and Interrupts 4.1 4.2 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 4.3 Resets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 4.3.1 Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71 4.3.2 External Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4.3.3 COP Watchdog Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4.3.4 Illegal Address Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4.4 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.1 Software Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.2 External Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73 4.4.3 Timer Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4.3.1 Real-Time Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4.3.2 Timer Overflow Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4.4 Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Section 5. Low-Power Modes 5.1 5.2 5.3 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Exiting Stop and Wait Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 80 5.4 Effects of Stop and Wait Modes . . . . . . . . . . . . . . . . . . . . . . . .81 5.4.1 Clock Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81 5.4.2 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 5.4.3 COP Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 5.4.4 Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 5.4.5 EPROM/OTPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 5.4.6 Data-Retention Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 5.5 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 MC68HC705J1A -- Rev. 4.0 MOTOROLA Table of Contents Technical Data 9 Table of Contents Section 6. Parallel Input/Output (I/O) Ports 6.1 6.2 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 6.3 Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 6.3.1 Port A Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 6.3.2 Data Direction Register A. . . . . . . . . . . . . . . . . . . . . . . . . . . 90 6.3.3 Pulldown Register A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 6.3.4 Port A LED Drive Capability . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.3.5 Port A I/O Pin Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.4 Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.4.1 Port B Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.4.2 Data Direction Register B. . . . . . . . . . . . . . . . . . . . . . . . . . . 93 6.4.3 Pulldown Register B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 6.5 6.6 5.0-Volt I/O Port Electrical Characteristics . . . . . . . . . . . . . . . . 95 3.3-Volt I/O Port Electrical Characteristics . . . . . . . . . . . . . . . . 95 Section 7. Computer Operating Properly (COP) Module 7.1 7.2 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 7.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 7.3.1 COP Watchdog Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 7.3.2 COP Watchdog Timeout Period . . . . . . . . . . . . . . . . . . . . . . 98 7.3.3 Clearing the COP Watchdog . . . . . . . . . . . . . . . . . . . . . . . .98 7.4 7.5 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 COP Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99 7.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 7.6.1 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 7.6.2 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 Technical Data 10 Table of Contents MC68HC705J1A -- Rev. 4.0 MOTOROLA Table of Contents Section 8. External Interrupt Module (IRQ) 8.1 8.2 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 8.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 8.3.1 IRQ/VPP Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 8.3.2 Optional External Interrupts . . . . . . . . . . . . . . . . . . . . . . . . 104 8.4 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 106 8.5 External Interrupt Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 8.5.1 5.0-Volt External Interrupt Timing Characteristics . . . . . . . 107 8.5.2 3.3-Volt External Interrupt Timing Characteristics . . . . . . . 107 Section 9. Multifunction Timer Module 9.1 9.2 9.3 9.4 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 9.5 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 9.5.1 Timer Status and Control Register . . . . . . . . . . . . . . . . . . .112 9.5.2 Timer Counter Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 9.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 9.6.1 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115 9.6.2 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115 Section 10. Electrical Specifications 10.1 10.2 10.3 10.4 10.5 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Operating Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . 119 Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 MC68HC705J1A -- Rev. 4.0 MOTOROLA Table of Contents Technical Data 11 Table of Contents 10.6 10.7 10.8 10.9 Power Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 5.0-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . .121 3.3-Volt DC Electrical Characteristics . . . . . . . . . . . . . . . . . . 122 Driver Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 10.10 Typical Supply Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 10.11 EPROM Programming Characteristics . . . . . . . . . . . . . . . . . . 126 10.12 5.0-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 10.13 3.3-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 Section 11. Mechanical Specifications 11.1 11.2 11.3 11.4 11.5 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Plastic Dual In-Line Package (Case 738) . . . . . . . . . . . . . . . . 132 Small Outline Integrated Circuit (Case 751) . . . . . . . . . . . . . .132 Ceramic Dual In-Line Package (Case 732) . . . . . . . . . . . . . . 133 Section 12. Ordering Information 12.1 12.2 12.3 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 MCU Order Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Appendix A. MC68HRC705J1A A.1 A.2 A.3 A.4 A.5 Technical Data 12 Table of Contents Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 RC Oscillator Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 Typical Internal Operating Frequency for RC Oscillator Option. . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Package Types and Order Numbers . . . . . . . . . . . . . . . . . . . 140 MC68HC705J1A -- Rev. 4.0 MOTOROLA Table of Contents Appendix B. MC68HSC705J1A B.1 B.2 B.3 B.4 B.5 B.6 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 5.0-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . .142 3.3-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . .142 Typical Supply Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Package Types and Order Numbers . . . . . . . . . . . . . . . . . . . 144 Appendix C. MC68HSR705J1A C.1 C.2 C.3 C.4 C.5 C.6 C.7 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 RC Oscillator Connections (External Resistor). . . . . . . . . . . . 145 Typical Internal Operating Frequency at 25C for High-Speed RC Oscillator Option. . . . . . . . . . . . . . . . . 146 RC Oscillator Connections (No External Resistor) . . . . . . . . .147 Typical Internal Operating Frequency versus Temperature (No External Resistor) . . . . . . . . . . . . . . . . . . . . . . . . . . . .148 Package Types and Order Numbers . . . . . . . . . . . . . . . . . . . 149 Index Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 MC68HC705J1A -- Rev. 4.0 MOTOROLA Table of Contents Technical Data 13 Table of Contents Technical Data 14 Table of Contents MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A List of Figures Figure 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 2-1 2-2 2-3 2-4 3-1 3-2 3-3 3-4 3-5 3-6 4-1 4-2 MC68HC705J1A -- Rev. 4.0 MOTOROLA List of Figures Title Page Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 Bypassing Layout Recommendation . . . . . . . . . . . . . . . . . . 26 Crystal Connections with Oscillator Internal Resistor Mask Option . . . . . . . . . . . . . 28 Crystal Connections without Oscillator Internal Resistor Mask Option . . . . . . . . . . . . . 28 Ceramic Resonator Connections with Oscillator Internal Resistor Mask Option . . . . . . . . . 29 Ceramic Resonator Connections without Oscillator Internal Resistor Mask Option. . . . . . . 29 External Clock Connections . . . . . . . . . . . . . . . . . . . . . . . . . 30 Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 I/O Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 EPROM Programming Register (EPROG). . . . . . . . . . . . . . 39 Mask Option Register (MOR) . . . . . . . . . . . . . . . . . . . . . . . .41 Programming Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Index Register (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . . . . 50 Reset Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Power-On Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Technical Data 15 List of Figures Figure 4-3 4-4 4-5 4-6 4-7 5-1 5-2 6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 7-1 8-1 8-2 8-3 8-4 9-1 9-2 9-3 9-4 Title Page External Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 External Interrupt Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 External Interrupt Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Interrupt Stacking Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Interrupt Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Stop Mode Recovery Timing . . . . . . . . . . . . . . . . . . . . . . . .85 Stop/Halt/Wait Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Parallel I/O Port Register Summary . . . . . . . . . . . . . . . . . . . 88 Port A Data Register (PORTA). . . . . . . . . . . . . . . . . . . . . . . 89 Data Direction Register A (DDRA) . . . . . . . . . . . . . . . . . . . .90 Port A I/O Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Pulldown Register A (PDRA) . . . . . . . . . . . . . . . . . . . . . . . .91 Port B Data Register (PORTB). . . . . . . . . . . . . . . . . . . . . . . 92 Data Direction Register B (DDRB) . . . . . . . . . . . . . . . . . . . .93 Port B I/O Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Pulldown Register B (PDRB) . . . . . . . . . . . . . . . . . . . . . . . .94 COP Register (COPR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99 IRQ Module Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 102 Interrupt Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . 106 External Interrupt Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 107 Multifunction Timer Block Diagram. . . . . . . . . . . . . . . . . . .110 I/O Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Timer Status and Control Register (TSCR) . . . . . . . . . . . . 112 Timer Counter Register (TCR) . . . . . . . . . . . . . . . . . . . . . . 114 Technical Data 16 List of Figures MC68HC705J1A -- Rev. 4.0 MOTOROLA List of Figures Figure 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 A-1 A-2 Title Page PA0-PA7, PB0-PB5 Typical High-Side Driver Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 123 PA0-PA3, PB0-PB5 Typical Low-Side Driver Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 123 PA4-PA7 Typical Low-Side Driver Characteristics . . . . . . 124 Typical Operating IDD (25C) . . . . . . . . . . . . . . . . . . . . . . .125 Typical Wait Mode IDD (25C) . . . . . . . . . . . . . . . . . . . . . . 125 External Interrupt Timing . . . . . . . . . . . . . . . . . . . . . . . . . . 128 Stop Mode Recovery Timing . . . . . . . . . . . . . . . . . . . . . . .128 Power-On Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 External Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 RC Oscillator Connections . . . . . . . . . . . . . . . . . . . . . . . . . 138 Typical Internal Operating Frequency for Various VDD at 25C -- RC Oscillator Option Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Typical High-Speed Operating IDD (25C) . . . . . . . . . . . . . 142 Typical High-Speed Wait Mode IDD (25C) . . . . . . . . . . . . 143 Typical Internal Operating Frequency at 25C for High-Speed RC Oscillator Option . . . . . . . . 146 RC Oscillator Connections (No External Resistor) . . . . . . . 147 Typical Internal Operating Frequency versus Temperature (OSCRES Bit = 1) . . . . . . . . . . . . 148 B-1 B-2 C-1 C-2 C-3 MC68HC705J1A -- Rev. 4.0 MOTOROLA List of Figures Technical Data 17 List of Figures Technical Data 18 List of Figures MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A List of Tables Table 1-1 3-1 3-2 3-3 3-4 3-5 3-6 3-7 4-1 4-2 4-3 4-4 6-1 6-2 9-1 12-1 A-1 Title Page Programmable Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Register/Memory Instructions. . . . . . . . . . . . . . . . . . . . . . . . . 55 Read-Modify-Write Instructions . . . . . . . . . . . . . . . . . . . . . . . 56 Jump and Branch Instructions . . . . . . . . . . . . . . . . . . . . . . . .58 Bit Manipulation Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . 59 Control Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 External Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 External Interrupt Timing (VDD = 5.0 Vdc) . . . . . . . . . . . . . . . 75 External Interrupt Timing (VDD = 3.3 Vdc) . . . . . . . . . . . . . . . 75 Reset/Interrupt Vector Addresses . . . . . . . . . . . . . . . . . . . . . 77 Port A Pin Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Port B Pin Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Real-Time Interrupt Rate Selection . . . . . . . . . . . . . . . . . . . 114 Order Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 MC68HRC705J1A (RC Oscillator Option) Order Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140 MC68HSC705J1A (High Speed) Order Numbers . . . . . . . . 144 MC68HSR705J1A (High-Speed RC Oscillator Option) Order Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149 B-1 C-1 MC68HC705J1A -- Rev. 4.0 MOTOROLA List of Tables Technical Data 19 List of Tables Technical Data 20 List of Tables MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 1. General Description 1.1 Contents 1.2 1.3 1.4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Programmable Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1.5 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1.5.1 VDD and VSS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1.5.2 OSC1 and OSC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 1.5.2.1 Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 1.5.2.2 Ceramic Resonator Oscillator . . . . . . . . . . . . . . . . . . . . . 28 1.5.2.3 RC Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 1.5.2.4 External Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 1.6 1.7 1.8 1.9 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 IRQ/VPP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 PA0-PA7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 PB0-PB5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Technical Data 21 General Description 1.2 Introduction The MC68HC705J1A is a member of Motorola's low-cost, high-performance M68HC05 Family of 8-bit microcontroller units (MCUs). The M68HC05 Family is based on the customer-specified integrated circuit (CSIC) design strategy. All MCUs in the family use the popular M68HC05 central processor unit (CPU) and are available with a variety of subsystems, memory sizes and types, and package types. On-chip memory of the MC68HC705J1A includes 1240 bytes of erasable, programmable read-only memory (EPROM). In packages without the transparent window for EPROM erasure, the 1240 EPROM bytes serve as one-time programmable read-only memory (OTPROM). The MC68HRC705J1A is a resistor-capacitor (RC) oscillator mask option version of the MC68HC705J1A and is discussed in Appendix A. MC68HRC705J1A. A high-speed version of the MC68HC705J1A, the MC68HSC705J1A, is discussed in Appendix B. MC68HSC705J1A. The MC68HSR705J1A, discussed in Appendix C. MC68HSR705J1A, is a high-speed version of the MC68HRC705J1A. A functional block diagram of the MC68HC705J1A is shown in Figure 1-1. Technical Data 22 General Description MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Introduction OSC1 OSC2 INTERNAL OSCILLATOR DIVIDE BY 2 15-STAGE MULTIFUNCTION TIMER SYSTEM WATCHDOG AND ILLEGAL ADDRESS DETECT RESET 68HC05 CPU IRQ/VPP ACCUMULATOR CPU REGISTERS INDEX REGISTER 0 0 0 0 0 0 0 0 1 1 STK PTR PROGRAM COUNTER DATA DIRECTION REGISTER B CPU CONTROL ALU PB5 PB4 PORT B PB3 PB2 PB1 PB0 DATA DIRECTION REGISTER A CONDITION CODE REGISTER 1 1 1 H I N Z C PA7* PA6* PA5* PORT A PA4* PA3** PA2** PA1** PA0** STATIC RAM (SRAM) -- 64 BYTES USER EPROM -- 1240 BYTES *10-mA sink capability **External interrupt capability MASK OPTION REGISTER (EPROM) Figure 1-1. Block Diagram MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Technical Data 23 General Description 1.3 Features Features of the MC68HC705J1A include: * Peripheral modules: - 15-stage multifunction timer - Computer operating properly (COP) watchdog * 14 bidirectional input/output (I/O) lines, including: - 10-mA sink capability on four I/O pins - Mask option register (MOR) and software programmable pulldowns on all I/O pins - MOR selectable interrupt on four I/O pins, a keyboard scan feature * * MOR selectable sensitivity on external interrupt (edge- and level-sensitive or edge-sensitive only) On-chip oscillator with connections for: - Crystal - Ceramic resonator - Resistor-capacitor (RC) oscillator - External clock * * * * * * * * 1240 bytes of EPROM/OTPROM, including eight bytes for user vectors 64 bytes of user random-access memory (RAM) Memory-mapped I/O registers Fully static operation with no minimum clock speed Power-saving stop, halt, wait, and data-retention modes External interrupt mask bit and acknowledge bit Illegal address reset Internal steering diode and pullup resistor from RESET pin to VDD Technical Data 24 General Description MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Programmable Options 1.4 Programmable Options The options in Table 1-1 are programmable in the mask option register (MOR). Table 1-1. Programmable Options Feature COP watchdog timer External interrupt triggering Port A IRQ pin interrupts Port pulldown resistors STOP instruction mode Crystal oscillator internal resistor EPROM security Short oscillator delay counter Enabled or disabled Edge-sensitive only or edge- and level-sensitive Enabled or disabled Enabled or disabled Stop mode or halt mode Enabled or disabled Enabled or disabled Enabled or disabled Option 1.5 Pin Assignments Figure 1-2 shows the MC68HC705J1A pin assignments. 1.5.1 VDD and VSS VDD and VSS are the power supply and ground pins. The MCU operates from a single power supply. Very fast signal transitions occur on the MCU pins, placing high, short-duration current demands on the power supply. To prevent noise problems, take special care as Figure 1-3 shows, by placing the bypass capacitors as close as possible to the MCU. C2 is an optional bulk current bypass capacitor for use in applications that require the port pins to source high current levels. MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Technical Data 25 General Description OSC1 1 20 RESET OSC2 2 19 IRQ/VPP PB5 3 18 PA0 PB4 4 17 PA1 PB3 5 16 PA2 PB2 6 15 PA3 PB1 7 14 PA4 PB0 8 13 PA5 VDD 9 12 PA6 VSS 10 11 PA7 Figure 1-2. Pin Assignments V+ VDD VDD + C2 C2 C1 VSS MCU C1 0.1 F VSS Figure 1-3. Bypassing Layout Recommendation Technical Data 26 General Description MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Pin Assignments 1.5.2 OSC1 and OSC2 The OSC1 and OSC2 pins are the connections for the on-chip oscillator. The oscillator can be driven by any of these: 1. Crystal (See Figure 1-4 and Figure 1-5.) 2. Ceramic resonator (See Figure 1-6 and Figure 1-7.) 3. Resistor/capacitor (RC) oscillator (Refer to Appendix A. MC68HRC705J1A and Appendix C. MC68HSR705J1A.) 4. External clock signal (See Figure 1-8.) The frequency, fosc, of the oscillator or external clock source is divided by two to produce the internal operating frequency, fop. 1.5.2.1 Crystal Oscillator Figure 1-4 and Figure 1-5 show a typical crystal oscillator circuit for an AT-cut, parallel resonant crystal. Follow the crystal supplier's recommendations, as the crystal parameters determine the external component values required to provide reliable startup and maximum stability. The load capacitance values used in the oscillator circuit design should include all stray layout capacitances. To minimize output distortion, mount the crystal and capacitors as close as possible to the pins. An internal startup resistor of approximately 2 M is provided between OSC1 and OSC2 for the crystal oscillator as a programmable mask option. NOTE: Use an AT-cut crystal and not an AT-strip crystal because the MCU can overdrive an AT-strip crystal. MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Technical Data 27 General Description VSS MCU C3 OSC1 OSC1 OSC2 XTAL OSC2 C4 XTAL C3 27 pF C4 27 pF C2 C1 VSS VDD Figure 1-4. Crystal Connections with Oscillator Internal Resistor Mask Option VSS MCU OSC1 OSC2 C3 OSC1 R 10 M3/4 XTAL R OSC2 C4 XTAL C3 27 pF C4 27 pF C2 C1 VSS VDD Figure 1-5. Crystal Connections without Oscillator Internal Resistor Mask Option 1.5.2.2 Ceramic Resonator Oscillator To reduce cost, use a ceramic resonator instead of the crystal. The circuits shown in Figure 1-6 and Figure 1-7 show ceramic resonator circuits. Follow the resonator manufacturer's recommendations, as the resonator parameters determine the external component values required for maximum stability and reliable starting. The load capacitance values used in the oscillator circuit design should include all stray capacitances. Technical Data 28 General Description MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Pin Assignments Mount the resonator and components as close as possible to the pins for startup stabilization and to minimize output distortion. An internal startup resistor of approximately 2 M is provided between OSC1 and OSC2 as a programmable mask option. VSS MCU C3 CERAMIC RESONATOR OSC1 OSC1 OSC2 OSC2 C3 27 pF CERAMIC RESONATOR C4 C4 27 pF C2 C1 VSS VDD Figure 1-6. Ceramic Resonator Connections with Oscillator Internal Resistor Mask Option VSS C3 MCU CERAMIC RESONATOR OSC1 R OSC2 OSC1 OSC2 R 10 M3/4 C4 VDD C4 27 pF C2 C1 VSS C3 27 pF CERAMIC RESONATOR Figure 1-7. Ceramic Resonator Connections without Oscillator Internal Resistor Mask Option MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Technical Data 29 General Description 1.5.2.3 RC Oscillator Refer to Appendix A. MC68HRC705J1A and Appendix C. MC68HSR705J1A. 1.5.2.4 External Clock An external clock from another complementary metal-oxide semiconductor (CMOS)-compatible device can be connected to the OSC1 input, with the OSC2 input not connected, as shown in Figure 1-8. This configuration is possible regardless of whether the crystal/ceramic resonator or the RC oscillator is enabled. MCU OSC1 OSC2 EXTERNAL CMOS CLOCK Figure 1-8. External Clock Connections 1.6 RESET Applying a logic 0 to the RESET pin forces the MCU to a known startup state. An internal reset also pulls the RESET pin low. An internal resistor to VDD pulls the RESET pin high. A steering diode between the RESET and VDD pins discharges any RESET pin voltage when power is removed from the MCU. The RESET pin contains an internal Schmitt trigger to improve its noise immunity as an input. Refer to Section 4. Resets and Interrupts for more information. Technical Data 30 General Description MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description IRQ/VPP 1.7 IRQ/VPP The external interrupt/programming voltage pin (IRQ/VPP) drives the asynchronous IRQ interrupt function of the CPU. Additionally, it is used to program the user EPROM and mask option register. (See Section 2. Memory and Section 8. External Interrupt Module (IRQ).) The LEVEL bit in the mask option register provides negative edge-sensitive triggering or both negative edge-sensitive and low level-sensitive triggering for the interrupt function. If level-sensitive triggering is selected, the IRQ/VPP input requires an external resistor to VDD for wired-OR operation. If the IRQ/VPP pin is not used, it must be tied to the VDD supply. The IRQ/VPP pin contains an internal Schmitt trigger as part of its input to improve noise immunity. The voltage on this pin should not exceed VDD except when the pin is being used for programming the EPROM. NOTE: The mask option register can enable the PA0-PA3 pins to function as external interrupt pins. 1.8 PA0-PA7 These eight input/output (I/O) lines comprise port A, a general-purpose, bidirectional I/O port. See Section 8. External Interrupt Module (IRQ) for information on PA0-PA3 external interrupts. 1.9 PB0-PB5 These six I/O lines comprise port B, a general-purpose, bidirectional I/O port. MC68HC705J1A -- Rev. 4.0 MOTOROLA General Description Technical Data 31 General Description Technical Data 32 General Description MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 2. Memory 2.1 Contents 2.2 2.3 2.4 2.5 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Input/Output Register Summary . . . . . . . . . . . . . . . . . . . . . . . .35 RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 2.6 EPROM/OTPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 2.6.1 EPROM/OTPROM Programming . . . . . . . . . . . . . . . . . . . . . 38 2.6.2 EPROM Programming Register . . . . . . . . . . . . . . . . . . . . . 39 2.6.3 EPROM Erasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 2.7 2.8 Mask Option Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 EPROM Programming Characteristics . . . . . . . . . . . . . . . . . . . 43 2.2 Introduction This section describes the organization of the on-chip memory consisting of: * * 1232 bytes of user erasable, programmable read-only memory (EPROM), plus eight bytes for user vectors 64 bytes of user random-access memory (RAM) MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Technical Data 33 Memory 2.3 Memory Map Port A Data Register (PORTA) Port B Data Register (PORTB) Unimplemented Data Direction Register A (DDRA) Data Direction Register B (DDRB) Unimplemented Timer Status and Control Register (TSCR) Timer Control Register (TCR) IRQ Status and Control Register (ISCR) Unimplemented Pulldown Register Port A (PDRA) Pulldown Register Port B (PDRB) Unimplemented EPROM Programming Register (EPROG) Unimplemented Reserved COP Register (COPR)(1) Mask Option Register (MOR) Reserved Timer Interrupt Vector High Timer Interrupt Vector Low External Interrupt Vector High External Interrupt Vector Low Software Interrupt Vector High Software Interrupt Vector Low Reset Vector High Reset Vector Low $0000 $0001 $0002 $0003 $0004 $0005 $0006 $0007 $0008 $0009 $000A $000B $000F $0010 $0011 $0012 $0017 $0018 $0019 $001E $001F $07F0 $07F1 $07F2 $07F7 $07F8 $07F9 $07FA $07FB $07FC $07FD $07FE $07FF $0000 $001F $0020 $00BF $00C0 $00FF $0100 $02FF $0300 $07CF $07D0 $07ED $07EE $07EF $07F0 $07FF I/O Registers 32 Bytes Unimplemented 160 Bytes RAM 64 Bytes Unimplemented 512 Bytes EPROM 1232 Bytes Unimplemented 30 Bytes Test ROM 2 Bytes Registers and EPROM 16 Bytes (1) Writing to bit 0 of $07F0 clears the computer operating properly (COP) watchdog. Figure 2-1. Memory Map Technical Data 34 Memory MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Input/Output Register Summary 2.4 Input/Output Register Summary Addr. Register Name Read: Port A Data Register (PORTA) Write: See page 89. Reset: Read: Port B Data Register (PORTB) Write: See page 92. Reset: Unimplemented Bit 7 PA7 6 PA6 5 PA5 4 PA4 3 PA3 2 PA2 1 PA1 Bit 0 PA0 $0000 Unaffected by reset 0 0 PB5 PB4 PB3 PB2 PB1 PB0 $0001 Unaffected by reset $0002 $0003 Unimplemented Read: Data Direction Register A DDRA7 $0004 (DDRA) Write: See page 90. Reset: 0 Read: Data Direction Register B $0005 (DDRB) Write: See page 93. Reset: $0006 Unimplemented 0 DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0 0 0 0 DDRB5 0 DDRB4 0 0 DDRB3 0 0 DDRB2 0 0 DDRB1 0 0 DDRB0 0 0 0 0 $0007 Unimplemented $0008 Read: Timer Status and Control Register (TSCR) Write: See page 112. Reset: TOF RTIF TOIE RTIE 0 TOFR 0 RT1 RTIFR 0 1 1 RT0 0 0 0 0 R = Reserved 0 = Unimplemented Figure 2-2. I/O Register Summary (Sheet 1 of 3) MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Technical Data 35 Memory Addr. Register Name Read: Timer Counter Register (TCR) Write: See page 114. Reset: Read: IRQ Status and Control Register (ISCR) Write: See page 106. Reset: Unimplemented Bit 7 TMR7 6 TMR6 5 TMR5 4 TMR4 3 TMR3 2 TMR2 1 TMR1 Bit 0 TMR0 $0009 0 IRQE 0 0 0 0 0 0 R 0 IRQF 0 0 0 0 IRQR 0 0 $000A 1 0 0 0 0 0 0 0 $000B $000F Unimplemented $0010 Read: Pulldown Register A (PDRA) Write: See page 91. Reset: Read: Pulldown Register B (PDRB) Write: See page 94. Reset: Unimplemented PDIA7 0 PDIA6 0 PDIA5 0 PDIA4 0 PDIA3 0 PDIA2 0 PDIA1 0 PDIA0 0 $0011 PDIB5 0 0 0 PDIB4 0 PDIB3 0 PDIB2 0 PDIB1 0 PDIB0 0 $0012 $0017 Unimplemented $0018 Read: EPROM Programming Register (EPROG) Write: See page 39. Reset: 0 0 R 0 R 0 0 R 0 R = Reserved 0 ELAT R 0 0 0 0 MPGM EPGM 0 0 = Unimplemented Figure 2-2. I/O Register Summary (Sheet 2 of 3) Technical Data 36 Memory MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory RAM Addr. $0019 $001E Register Name Unimplemented Bit 7 6 5 4 3 2 1 Bit 0 Unimplemented $001F Reserved R R R R R R R R $07F0 Read: COP Register (COPR) Write: See page 99. Reset: Read: Mask Option Register SOSCD (MOR) Write: See page 41. Reset: EPMSEC OSCRES SWAIT SWPDI PIRQ LEVEL COPC 0 COPEN $07F1 Unaffected by reset = Unimplemented R = Reserved Figure 2-2. I/O Register Summary (Sheet 3 of 3) 2.5 RAM The 64 addresses from $00C0 to $00FF serve as both the user RAM and the stack RAM. Before processing an interrupt, the central processor unit (CPU) uses five bytes of the stack to save the contents of the CPU registers. During a subroutine call, the CPU uses two bytes of the stack to store the return address. The stack pointer decrements when the CPU stores a byte on the stack and increments when the CPU retrieves a byte from the stack. NOTE: Be careful when using nested subroutines or multiple interrupt levels. The CPU may overwrite data in the RAM during a subroutine or during the interrupt stacking operation. MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Technical Data 37 Memory 2.6 EPROM/OTPROM A microcontroller unit (MCU) with a quartz window has 1240 bytes of erasable, programmable ROM (EPROM). The quartz window allows EPROM erasure with ultraviolet light. NOTE: Keep the quartz window covered with an opaque material except when programming the MCU. Ambient light can affect MCU operation. In an MCU without the quartz window, the EPROM cannot be erased and serves as 1240 bytes of one-time programmable ROM (OTPROM). These addresses are user EPROM/OTPROM locations: * * $0300-$07CF $07F8-$07FF, used for user-defined interrupt and reset vectors The computer operating properly (COP) register (COPR) is an EPROM/OTPROM location at address $07F0. The mask option register (MOR) is an EPROM/OTPROM location at address $07F1. 2.6.1 EPROM/OTPROM Programming The two ways to program the EPROM/OTPROM are: 1. Manipulating the control bits in the EPROM programming register to program the EPROM/OTPROM on a byte-by-byte basis 2. Programming the EPROM/OTPROM with the M68HC705J in-circuit simulator (M68HC705JICS) available from Motorola Technical Data 38 Memory MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory EPROM/OTPROM 2.6.2 EPROM Programming Register The EPROM programming register (EPROG) contains the control bits for programming the EPROM/OTPROM. Address: $0018 Bit 7 Read: Write: Reset: 0 0 6 0 R 0 5 0 R 0 4 0 R 0 3 0 ELAT R 0 R = Reserved 0 0 0 MPGM EPGM 2 1 Bit 0 = Unimplemented Figure 2-3. EPROM Programming Register (EPROG) ELAT -- EPROM Bus Latch Bit This read/write bit latches the address and data buses for EPROM/OTPROM programming. Clearing the ELAT bit automatically clears the EPGM bit. EPROM/OTPROM data cannot be read while the ELAT bit is set. Reset clears the ELAT bit. 1 = Address and data buses configured for EPROM/OTPROM programming the EPROM 0 = Address and data buses configured for normal operation MPGM -- MOR Programming Bit This read/write bit applies programming power from the IRQ/VPP pin to the mask option register. Reset clears MPGM. 1 = Programming voltage applied to MOR 0 = Programming voltage not applied to MOR EPGM -- EPROM Programming Bit This read/write bit applies the voltage from the IRQ/VPP pin to the EPROM. To write the EPGM bit, the ELAT bit must be set already. Reset clears EPGM. 1 = Programming voltage (IRQ/VPP pin) applied to EPROM 0 = Programming voltage (IRQ/VPP pin) not applied to EPROM MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Technical Data 39 Memory NOTE: Writing logic 1s to both the ELAT and EPGM bits with a single instruction sets ELAT and clears EPGM. ELAT must be set first by a separate instruction. Bits [7:3] -- Reserved Take these steps to program a byte of EPROM/OTPROM: 1. Apply the programming voltage, VPP, to the IRQ/VPP pin. 2. Set the ELAT bit. 3. Write to any EPROM/OTPROM address. 4. Set the EPGM bit and wait for a time, tEPGM. 5. Clear the ELAT bit. 2.6.3 EPROM Erasing The erased state of an EPROM bit is logic 0. Erase the EPROM by exposing it to 15 Ws/cm2 of ultraviolet light with a wave length of 2537 angstroms. Position the ultraviolet light source one inch from the EPROM. Do not use a shortwave filter. 2.7 Mask Option Register The mask option register (MOR) is an EPROM/OTPROM byte that controls these options: * * * * * * * * Technical Data 40 Memory COP watchdog (enable or disable) External interrupt pin triggering (edge-sensitive only or edge- and level-sensitive) Port A external interrupts (enable or disable) Port pulldown resistors (enable or disable) STOP instruction (stop mode or halt mode) Crystal oscillator internal resistor (enable or disable) EPROM security (enable or disable) Short oscillator delay (enable or disable) MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Mask Option Register Take these steps to program the mask option register: 1. Apply the programming voltage, VPP, to the IRQ/VPP pin. 2. Write to the MOR. 3. Set the MPGM bit and wait for a time, tMPGM. 4. Clear the MPGM bit. 5. Reset the MCU. Address: $07F1 Bit 7 Read: SOSCD Write: Reset: Unaffected by reset EPMSEC OSCRES SWAIT SWPDI PIRQ LEVEL COPEN 6 5 4 3 2 1 Bit 0 Figure 2-4. Mask Option Register (MOR) SOSCD -- Short Oscillator Delay Bit The SOSCD bit controls the oscillator stabilization counter. The normal stabilization delay following reset or exit from stop mode is 4064 tcyc. Setting SOSCD enables a short oscillator stabilization delay. 1 = Short oscillator delay enabled 0 = Short oscillator delay disabled EPMSEC -- EPROM Security Bit The EPMSEC bit controls access to the EPROM/OTPROM. 1 = External access to EPROM/OTPROM denied 0 = External access to EPROM/OTPROM not denied OSCRES -- Oscillator Internal Resistor Bit The OSCRES bit enables a 2-M internal resistor in the oscillator circuit. 1 = Oscillator internal resistor enabled 0 = Oscillator internal resistor disabled NOTE: Program the OSCRES bit to logic 0 in devices using RC oscillators. MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Technical Data 41 Memory SWAIT -- Stop-to-Wait Conversion Bit The SWAIT bit enables halt mode. When the SWAIT bit is set, the CPU interprets the STOP instruction as a WAIT instruction, and the MCU enters halt mode. Halt mode is the same as wait mode, except that an oscillator stabilization delay of 1 to 4064 tcyc occurs after exiting halt mode. 1 = Halt mode enabled 0 = Halt mode not enabled SWPDI -- Software Pulldown Inhibit Bit The SWPDI bit inhibits software control of the I/O port pulldown devices. The SWPDI bit overrides the pulldown inhibit bits in the port pulldown inhibit registers. 1 = Software pulldown control inhibited 0 = Software pulldown control not inhibited PIRQ -- Port A External Interrupt Bit The PIRQ bit enables the PA0-PA3 pins to function as external interrupt pins. 1 = PA0-PA3 enabled as external interrupt pins 0 = PA0-PA3 not enabled as external interrupt pins LEVEL --External Interrupt Sensitivity Bit The LEVEL bit controls external interrupt triggering sensitivity. 1 = External interrupts triggered by active edges and active levels 0 = External interrupts triggered only by active edges COPEN -- COP Enable Bit The COPEN bit enables the COP watchdog. 1 = COP watchdog enabled 0 = COP watchdog disabled Technical Data 42 Memory MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory EPROM Programming Characteristics 2.8 EPROM Programming Characteristics Characteristic(1) Programming voltage IRQ/VPP Programming current IRQ/VPP Programming time Per array byte MOR Symbol VPP IPP Min 16.0 Typ 16.5 Max 17.0 Unit V --| 3.0 10.0 mA tEPGM tMPGM 4 4 -- -- -- -- ms 1. V DD = 5.0 Vdc 10%, V SS = 0 Vdc, TA = -40C to +105C MC68HC705J1A -- Rev. 4.0 MOTOROLA Memory Technical Data 43 Memory Technical Data 44 Memory MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 3. Central Processor Unit (CPU) 3.1 Contents 3.2 3.3 3.4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 CPU Control Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Arithmetic/Logic Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 3.5 CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.1 Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.2 Index Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.3 Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 3.5.4 Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 3.5.5 Condition Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 3.6 Instruction Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 3.6.1 Addressing Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3.6.1.1 Inherent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52 3.6.1.2 Immediate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3.6.1.3 Direct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.4 Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.5 Indexed, No Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.6 Indexed, 8-Bit Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.6.1.7 Indexed, 16-Bit Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 3.6.1.8 Relative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 3.6.2 Instruction Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 3.6.2.1 Register/Memory Instructions . . . . . . . . . . . . . . . . . . . . . 55 3.6.2.2 Read-Modify-Write Instructions . . . . . . . . . . . . . . . . . . . . 56 3.6.2.3 Jump/Branch Instructions . . . . . . . . . . . . . . . . . . . . . . . .57 3.6.2.4 Bit Manipulation Instructions . . . . . . . . . . . . . . . . . . . . . . 59 3.6.2.5 Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 3.7 3.8 MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Technical Data 45 Central Processor Unit (CPU) 3.2 Introduction The central processor unit (CPU) consists of a CPU control unit, an arithmetic/logic unit (ALU), and five CPU registers. The CPU control unit fetches and decodes instructions. The ALU executes the instructions. The CPU registers contain data, addresses, and status bits that reflect the results of CPU operations. See Figure 3-1. Features include: * * * * * * * * * 2.1-MHz bus frequency 8-bit accumulator 8-bit index register 11-bit program counter 6-bit stack pointer Condition code register (CCR) with five status flags 62 instructions Eight addressing modes Power-saving stop, wait, halt, and data-retention modes 3.3 CPU Control Unit The CPU control unit fetches and decodes instructions during program operation. The control unit selects the memory locations to read and write and coordinates the timing of all CPU operations. 3.4 Arithmetic/Logic Unit The arithmetic/logic unit (ALU) performs the arithmetic, logic, and manipulation operations decoded from the instruction set by the CPU control unit. The ALU produces the results called for by the program and sets or clears status and control bits in the condition code register (CCR). Technical Data 46 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Arithmetic/Logic Unit CPU CONTROL UNIT ARITHMETIC/LOGIC UNIT 7 6 5 4 3 2 1 0 ACCUMULATOR (A) 7 6 5 4 3 2 1 0 INDEX REGISTER (X) 15 14 13 12 11 10 0 0 0 0 0 0 9 0 8 0 7 1 6 1 5 4 3 2 1 0 STACK POINTER (SP) 15 14 13 12 11 10 0 0 0 0 0 9 8 7 6 5 4 3 2 1 0 PROGRAM COUNTER (PC) 7 1 6 1 5 1 4 H 3 I 2 N 1 Z 0 C CONDITION CODE REGISTER (CCR) HALF-CARRY FLAG INTERRUPT MASK NEGATIVE FLAG ZERO FLAG CARRY/BORROW FLAG Figure 3-1. Programming Model MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 47 Central Processor Unit (CPU) 3.5 CPU Registers The M68HC05 CPU contains five registers that control and monitor microcontroller unit (MCU) operation: * * * * * Accumulator Index register Stack pointer Program counter Condition code register CPU registers are not memory mapped. 3.5.1 Accumulator The accumulator (A) is a general-purpose 8-bit register. The CPU uses the accumulator to hold operands and results of ALU operations. Bit 7 Read: Write: Reset: Unaffected by reset 6 5 4 3 2 1 Bit 0 Figure 3-2. Accumulator (A) 3.5.2 Index Register In the indexed addressing (X) modes, the CPU uses the byte in the index register to determine the conditional address of the operand. The index register also can serve as a temporary storage location or a counter. Bit 7 Read: Write: Reset: Unaffected by reset 6 5 4 3 2 1 Bit 0 Figure 3-3. Index Register (X) Technical Data 48 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) CPU Registers 3.5.3 Stack Pointer The stack pointer (SP) is a 16-bit register that contains the address of the next location on the stack. During a reset or after the reset stack pointer instruction (RSP), the stack pointer is preset to $00FF. The address in the stack pointer decrements after a byte is stacked and increments before a byte is unstacked. Bit 15 Read: Write: Reset: 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 Bit 0 14 0 13 0 12 0 11 0 10 0 9 0 8 0 7 1 6 1 5 4 3 2 1 = Unimplemented Figure 3-4. Stack Pointer (SP) The 10 most significant bits of the stack pointer are permanently fixed at 0000000011, so the stack pointer produces addresses from $00C0 to $00FF. If subroutines and interrupts use more than 64 stack locations, the stack pointer wraps around to address $00FF and begins writing over the previously stored data. A subroutine uses two stack locations; an interrupt uses five locations. MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 49 Central Processor Unit (CPU) 3.5.4 Program Counter The program counter (PC) is a 16-bit register that contains the address of the next instruction or operand to be fetched. The five most significant bits of the program counter are ignored and appear as 00000. Normally, the address in the program counter automatically increments to the next sequential memory location every time an instruction or operand is fetched. Jump, branch, and interrupt operations load the program counter with an address other than that of the next sequential location. Bit 15 Read: Write: Reset: 0 0 0 0 0 Loaded with vector from $07FE and $07FF Bit 0 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Figure 3-5. Program Counter (PC) 3.5.5 Condition Code Register The condition code register (CCR) is an 8-bit register whose three most significant bits are permanently fixed at 111. The condition code register contains the interrupt mask and four flags that indicate the results of the instruction just executed. Bit 7 Read: Write: Reset: 1 1 1 U 1 U = Unaffected U U U 1 6 1 5 1 H I N Z C 4 3 2 1 Bit 0 = Unimplemented Figure 3-6. Condition Code Register (CCR) Technical Data 50 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) CPU Registers H -- Half-Carry Flag The CPU sets the half-carry flag when a carry occurs between bits 3 and 4 of the accumulator during an ADD (add without carry) or ADC (add with carry) operation. The half-carry flag is required for binary-coded decimal (BCD) arithmetic operations. I -- Interrupt Mask Bit Setting the interrupt mask disables interrupts. If an interrupt request occurs while the interrupt mask is logic 0, the CPU saves the CPU registers on the stack, sets the interrupt mask, and then fetches the interrupt vector. If an interrupt request occurs while the interrupt mask is logic 1, the interrupt request is latched. Normally, the CPU processes the latched interrupt request as soon as the interrupt mask is cleared again. A return-from-interrupt instruction (RTI) unstacks the CPU registers, restoring the interrupt mask to its cleared state. After any reset, the interrupt mask is set and can be cleared only by a software instruction. N -- Negative Flag The CPU sets the negative flag when an ALU operation produces a negative result. Z -- Zero Flag The CPU sets the zero flag when an ALU operation produces a result of $00. C -- Carry/Borrow Flag The CPU sets the carry/borrow flag when an addition operation produces a carry out of bit 7 of the accumulator or when a subtraction operation requires a borrow. Some logical operations and data manipulation instructions also clear or set the carry/borrow flag. MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 51 Central Processor Unit (CPU) 3.6 Instruction Set The MCU instruction set has 62 instructions and uses eight addressing modes. 3.6.1 Addressing Modes The CPU uses eight addressing modes for flexibility in accessing data. The addressing modes provide eight different ways for the CPU to find the data required to execute an instruction. The eight addressing modes are: * * * * * * * * 3.6.1.1 Inherent Inherent instructions are those that have no operand, such as return from interrupt (RTI) and stop (STOP). Some of the inherent instructions act on data in the CPU registers, such as set carry flag (SEC) and increment accumulator (INCA). Inherent instructions require no operand address and are one byte long. 3.6.1.2 Immediate Immediate instructions are those that contain a value to be used in an operation with the value in the accumulator or index register. Immediate instructions require no operand address and are two bytes long. The opcode is the first byte, and the immediate data value is the second byte. Inherent Immediate Direct Extended Indexed, no offset Indexed, 8-bit offset Indexed, 16-bit offset Relative Technical Data 52 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Instruction Set 3.6.1.3 Direct Direct instructions can access any of the first 256 memory locations with two bytes. The first byte is the opcode, and the second is the low byte of the operand address. In direct addressing, the CPU automatically uses $00 as the high byte of the operand address. 3.6.1.4 Extended Extended instructions use three bytes and can access any address in memory. The first byte is the opcode; the second and third bytes are the high and low bytes of the operand address. When using the Motorola assembler, the programmer does not need to specify whether an instruction is direct or extended. The assembler automatically selects the shortest form of the instruction. 3.6.1.5 Indexed, No Offset Indexed instructions with no offset are 1-byte instructions that can access data with variable addresses within the first 256 memory locations. The index register contains the low byte of the effective address of the operand. The CPU automatically uses $00 as the high byte, so these instructions can address locations $0000-$00FF. Indexed, no offset instructions are often used to move a pointer through a table or to hold the address of a frequently used RAM or input/output (I/O) location. 3.6.1.6 Indexed, 8-Bit Offset Indexed, 8-bit offset instructions are 2-byte instructions that can access data with variable addresses within the first 511 memory locations. The CPU adds the unsigned byte in the index register to the unsigned byte following the opcode. The sum is the effective address of the operand. These instructions can access locations $0000-$01FE. Indexed 8-bit offset instructions are useful for selecting the kth element in an n-element table. The table can begin anywhere within the first 256 memory locations and could extend as far as location 510 ($01FE). MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 53 Central Processor Unit (CPU) The k value is typically in the index register, and the address of the beginning of the table is in the byte following the opcode. 3.6.1.7 Indexed, 16-Bit Offset Indexed, 16-bit offset instructions are 3-byte instructions that can access data with variable addresses at any location in memory. The CPU adds the unsigned byte in the index register to the two unsigned bytes following the opcode. The sum is the effective address of the operand. The first byte after the opcode is the high byte of the 16-bit offset; the second byte is the low byte of the offset. Indexed, 16-bit offset instructions are useful for selecting the kth element in an n-element table anywhere in memory. As with direct and extended addressing, the Motorola assembler determines the shortest form of indexed addressing. 3.6.1.8 Relative Relative addressing is only for branch instructions. If the branch condition is true, the CPU finds the effective branch destination by adding the signed byte following the opcode to the contents of the program counter. If the branch condition is not true, the CPU goes to the next instruction. The offset is a signed, two's complement byte that gives a branching range of -128 to +127 bytes from the address of the next location after the branch instruction. When using the Motorola assembler, the programmer does not need to calculate the offset because the assembler determines the proper offset and verifies that it is within the span of the branch. Technical Data 54 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Instruction Set 3.6.2 Instruction Types The MCU instructions fall into these five categories: * * * * * Register/memory instructions Read-modify-write instructions Jump/branch instructions Bit manipulation instructions Control instructions 3.6.2.1 Register/Memory Instructions These instructions operate on CPU registers and memory locations. Most of them use two operands. One operand is in either the accumulator or the index register. The CPU finds the other operand in memory. Table 3-1. Register/Memory Instructions Instruction Add memory byte and carry bit to accumulator Add memory byte to accumulator AND memory byte with accumulator Bit test accumulator Compare accumulator Compare index register with memory byte EXCLUSIVE OR accumulator with memory byte Load accumulator with memory byte Load index register with memory byte Multiply OR accumulator with memory byte Subtract memory byte and carry bit from accumulator Store accumulator in memory Store index register in memory Subtract memory byte from accumulator Mnemonic ADC ADD AND BIT CMP CPX EOR LDA LDX MUL ORA SBC STA STX SUB MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 55 Central Processor Unit (CPU) 3.6.2.2 Read-Modify-Write Instructions These instructions read a memory location or a register, modify its contents, and write the modified value back to the memory location or to the register. NOTE: Do not use read-modify-write instructions on registers with write-only bits. Table 3-2. Read-Modify-Write Instructions Instruction Arithmetic shift left (same as LSL) Arithmetic shift right Bit clear Bit set Clear register Complement (one's complement) Decrement Increment Logical shift left (same as ASL) Logical shift right Negate (two's complement) Rotate left through carry bit Rotate right through carry bit Test for negative or zero Mnemonic ASL ASR BCLR (1) BSET(1) CLR COM DEC INC LSL LSR NEG ROL ROR TST(2) 1. Unlike other read-modify-write instructions, BCLR and BSET use only direct addressing. 2. TST is an exception to the read-modify-write sequence because it does not write a replacement value. Technical Data 56 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Instruction Set 3.6.2.3 Jump/Branch Instructions Jump instructions allow the CPU to interrupt the normal sequence of the program counter. The unconditional jump instruction (JMP) and the jump-to-subroutine instruction (JSR) have no register operand. Branch instructions allow the CPU to interrupt the normal sequence of the program counter when a test condition is met. If the test condition is not met, the branch is not performed. The BRCLR and BRSET instructions cause a branch based on the state of any readable bit in the first 256 memory locations. These 3-byte instructions use a combination of direct addressing and relative addressing. The direct address of the byte to be tested is in the byte following the opcode. The third byte is the signed offset byte. The CPU finds the effective branch destination by adding the third byte to the program counter if the specified bit tests true. The bit to be tested and its condition (set or clear) is part of the opcode. The span of branching is from -128 to +127 from the address of the next location after the branch instruction. The CPU also transfers the tested bit to the carry/borrow bit of the condition code register. NOTE: Do not use BRCLR or BRSET instructions on registers with write-only bits. MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 57 Central Processor Unit (CPU) Table 3-3. Jump and Branch Instructions Instruction Branch if carry bit clear Branch if carry bit set Branch if equal Branch if half-carry bit clear Branch if half-carry bit set Branch if higher Branch if higher or same Branch if IRQ pin high Branch if IRQ pin low Branch if lower Branch if lower or same Branch if interrupt mask clear Branch if minus Branch if interrupt mask set Branch if not equal Branch if plus Branch always Branch if bit clear Branch never Branch if bit set Branch to subroutine Unconditional jump Jump to subroutine Mnemonic BCC BCS BEQ BHCC BHCS BHI BHS BIH BIL BLO BLS BMC BMI BMS BNE BPL BRA BRCLR BRN BRSET BSR JMP JSR Technical Data 58 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Instruction Set 3.6.2.4 Bit Manipulation Instructions The CPU can set or clear any writable bit in the first 256 bytes of memory, which includes I/O registers and on-chip RAM locations. The CPU can also test and branch based on the state of any bit in any of the first 256 memory locations. Table 3-4. Bit Manipulation Instructions Instruction Bit clear Branch if bit clear Branch if bit set Bit set Mnemonic BCLR BRCLR BRSET BSET NOTE: Do not use bit manipulation instructions on registers with write-only bits. MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 59 Central Processor Unit (CPU) 3.6.2.5 Control Instructions These instructions act on CPU registers and control CPU operation during program execution. Table 3-5. Control Instructions Instruction Clear carry bit Clear interrupt mask No operation Reset stack pointer Return from interrupt Return from subroutine Set carry bit Set interrupt mask Stop oscillator and enable IRQ pin Software interrupt Transfer accumulator to index register Transfer index register to accumulator Stop CPU clock and enable interrupts Mnemonic CLC CLI NOP RSP RTI RTS SEC SEI STOP SWI TAX TXA WAIT Technical Data 60 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Instruction Set Summary 3.7 Instruction Set Summary Table 3-6. Instruction Set Summary (Sheet 1 of 6) Source Form ADC #opr ADC opr ADC opr ADC opr,X ADC opr,X ADC ,X ADD #opr ADD opr ADD opr ADD opr,X ADD opr,X ADD ,X AND #opr AND opr AND opr AND opr,X AND opr,X AND ,X ASL opr ASLA ASLX ASL opr,X ASL ,X ASR opr ASRA ASRX ASR opr,X ASR ,X BCC rel Operation Description H I NZC Add with Carry A (A) + (M) + (C) -- IMM DIR EXT IX2 IX1 IX IMM DIR EXT IX2 IX1 IX IMM DIR EXT IX2 IX1 IX DIR INH INH IX1 IX DIR INH INH IX1 IX REL (b0) (b1) (b2) (b3) (b4) (b5) (b6) (b7) ii A9 2 B9 dd 3 C9 hh ll 4 D9 ee ff 5 E9 ff 4 F9 3 AB ii 2 BB dd 3 CB hh ll 4 DB ee ff 5 EB ff 4 FB 3 ii A4 2 B4 dd 3 C4 hh ll 4 D4 ee ff 5 E4 ff 4 F4 3 38 48 58 68 78 37 47 57 67 77 24 11 13 15 17 19 1B 1D 1F 25 27 28 29 dd 5 3 3 6 5 5 3 3 6 5 3 5 5 5 5 5 5 5 5 3 3 3 3 Add without Carry A (A) + (M) -- Logical AND A (A) (M) ---- -- Arithmetic Shift Left (Same as LSL) C b7 b0 0 ---- ff dd Arithmetic Shift Right b7 b0 C ---- ff Branch if Carry Bit Clear PC (PC) + 2 + rel ? C = 0 ---------- rr dd dd dd dd dd dd dd dd rr rr rr rr BCLR n opr Clear Bit n Mn 0 DIR DIR DIR DIR ---------- DIR DIR DIR DIR ---------- ---------- ---------- ---------- BCS rel BEQ rel BHCC rel BHCS rel Branch if Carry Bit Set (Same as BLO) Branch if Equal Branch if Half-Carry Bit Clear Branch if Half-Carry Bit Set PC (PC) + 2 + rel ? C = 1 PC (PC) + 2 + rel ? Z = 1 PC (PC) + 2 + rel ? H = 0 PC (PC) + 2 + rel ? H = 1 REL REL REL REL MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 61 Cycles Effect on CCR Operand Address Mode Opcode Central Processor Unit (CPU) Table 3-6. Instruction Set Summary (Sheet 2 of 6) Source Form BHI rel BHS rel BIH rel BIL rel BIT #opr BIT opr BIT opr BIT opr,X BIT opr,X BIT ,X BLO rel BLS rel BMC rel BMI rel BMS rel BNE rel BPL rel BRA rel Branch if Higher Branch if Higher or Same Branch if IRQ Pin High Branch if IRQ Pin Low Operation Description H I NZC PC (PC) + 2 + rel ? C Z = 0 -- -- -- -- -- PC (PC) + 2 + rel ? C = 0 PC (PC) + 2 + rel ? IRQ = 1 PC (PC) + 2 + rel ? IRQ = 0 ---------- ---------- ---------- REL REL REL REL IMM DIR EXT IX2 IX1 IX REL REL REL REL REL REL REL REL DIR DIR DIR DIR DIR DIR DIR DIR (b0) (b1) (b2) (b3) (b4) (b5) (b6) (b7) 22 24 2F 2E rr rr rr rr 3 3 3 3 Bit Test Accumulator with Memory Byte (A) (M) ---- -- ii A5 2 B5 dd 3 C5 hh ll 4 D5 ee ff 5 E5 ff 4 F5 3 25 23 2C 2B 2D 26 2A 20 01 03 05 07 09 0B 0D 0F 21 00 02 04 06 08 0A 0C 0E 10 12 14 16 18 1A 1C 1E rr rr rr rr rr rr rr rr dd rr dd rr dd rr dd rr dd rr dd rr dd rr dd rr rr dd rr dd rr dd rr dd rr dd rr dd rr dd rr dd rr dd dd dd dd dd dd dd dd 3 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 3 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Branch if Lower (Same as BCS) Branch if Lower or Same Branch if Interrupt Mask Clear Branch if Minus Branch if Interrupt Mask Set Branch if Not Equal Branch if Plus Branch Always PC (PC) + 2 + rel ? C = 1 ---------- PC (PC) + 2 + rel ? C Z = 1 -- -- -- -- -- PC (PC) + 2 + rel ? I = 0 PC (PC) + 2 + rel ? N = 1 PC (PC) + 2 + rel ? I = 1 PC (PC) + 2 + rel ? Z = 0 PC (PC) + 2 + rel ? N = 0 PC (PC) + 2 + rel ? 1 = 1 ---------- ---------- ---------- ---------- ---------- ---------- BRCLR n opr rel Branch if Bit n Clear PC (PC) + 2 + rel ? Mn = 0 -------- BRN rel Branch Never PC (PC) + 2 + rel ? 1 = 0 ---------- REL DIR DIR DIR DIR DIR DIR DIR DIR (b0) (b1) (b2) (b3) (b4) (b5) (b6) (b7) (b0) (b1) (b2) (b3) (b4) (b5) (b6) (b7) BRSET n opr rel Branch if Bit n Set PC (PC) + 2 + rel ? Mn = 1 -------- BSET n opr Set Bit n Mn 1 DIR DIR DIR DIR ---------- DIR DIR DIR DIR Technical Data 62 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Cycles Effect on CCR Operand Address Mode Opcode Central Processor Unit (CPU) Instruction Set Summary Table 3-6. Instruction Set Summary (Sheet 3 of 6) Source Form Operation Description PC (PC) + 2; push (PCL) SP (SP) - 1; push (PCH) SP (SP) - 1 PC (PC) + rel C0 I0 M $00 A $00 X $00 M $00 M $00 H I NZC Branch to Subroutine ---------- BSR rel REL AD rr 6 CLC CLI CLR opr CLRA CLRX CLR opr,X CLR ,X CMP CMP CMP CMP CMP CMP #opr opr opr opr,X opr,X ,X Clear Carry Bit Clear Interrupt Mask -------- 0 -- 0 ------ INH INH DIR INH INH IX1 IX IMM DIR EXT IX2 IX1 IX DIR INH INH IX1 IX IMM DIR EXT IX2 IX1 IX DIR INH INH IX1 IX IMM DIR EXT IX2 IX1 IX DIR INH INH IX1 IX 98 9A 3F 4F 5F 6F 7F dd 2 2 5 3 3 6 5 Clear Byte ---- 0 1 -- ff Compare Accumulator with Memory Byte (A) - (M) ---- ii A1 2 B1 dd 3 C1 hh ll 4 D1 ee ff 5 E1 ff 4 F1 3 33 43 53 63 73 dd 5 3 3 6 5 COM opr COMA COMX COM opr,X COM ,X CPX #opr CPX opr CPX opr CPX opr,X CPX opr,X CPX ,X DEC opr DECA DECX DEC opr,X DEC ,X EOR #opr EOR opr EOR opr EOR opr,X EOR opr,X EOR ,X INC opr INCA INCX INC opr,X INC ,X M (M) = $FF - (M) A (A) = $FF - (A) Complement Byte (One's Complement) X (X) = $FF - (X) M (M) = $FF - (M) M (M) = $FF - (M) ---- 1 ff Compare Index Register with Memory Byte (X) - (M) ---- ii A3 2 B3 dd 3 C3 hh ll 4 D3 ee ff 5 E3 ff 4 F3 3 3A 4A 5A 6A 7A dd 5 3 3 6 5 Decrement Byte M A X M M (M) - 1 (A) - 1 (X) - 1 (M) - 1 (M) - 1 ---- -- ff EXCLUSIVE OR Accumulator with Memory Byte A (A) (M) ---- -- ii A8 2 B8 dd 3 C8 hh ll 4 D8 ee ff 5 E8 ff 4 F8 3 3C 4C 5C 6C 7C dd 5 3 3 6 5 Increment Byte M (M) + 1 A (A) + 1 X (X) + 1 M (M) + 1 M (M) + 1 ---- -- ff MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 63 Cycles Effect on CCR Operand Address Mode Opcode Central Processor Unit (CPU) Table 3-6. Instruction Set Summary (Sheet 4 of 6) Source Form JMP JMP JMP JMP JMP opr opr opr,X opr,X ,X Operation Description H I NZC Unconditional Jump PC Jump Address ---------- DIR EXT IX2 IX1 IX DIR EXT IX2 IX1 IX IMM DIR EXT IX2 IX1 IX IMM DIR EXT IX2 IX1 IX DIR INH INH IX1 IX DIR INH INH IX1 IX INH DIR INH INH IX1 IX INH IMM DIR EXT IX2 IX1 IX BC dd 2 CC hh ll 3 DC ee ff 4 EC ff 3 FC 2 BD dd 5 CD hh ll 6 DD ee ff 7 ED ff 6 FD 5 ii A6 2 B6 dd 3 C6 hh ll 4 D6 ee ff 5 E6 ff 4 F6 3 AE ii 2 BE dd 3 CE hh ll 4 DE ee ff 5 EE ff 4 FE 3 38 48 58 68 78 34 44 54 64 74 42 30 40 50 60 70 9D dd dd 5 3 3 6 5 5 3 3 6 5 11 5 3 3 6 5 2 JSR opr JSR opr JSR opr,X JSR opr,X JSR ,X LDA LDA LDA LDA LDA LDA LDX LDX LDX LDX LDX LDX #opr opr opr opr,X opr,X ,X #opr opr opr opr,X opr,X ,X Jump to Subroutine PC (PC) + n (n = 1, 2, or 3) Push (PCL); SP (SP) - 1 Push (PCH); SP (SP) - 1 PC Effective Address ---------- Load Accumulator with Memory Byte A (M) ---- -- Load Index Register with Memory Byte X (M) ---- -- LSL opr LSLA LSLX LSL opr,X LSL ,X LSR opr LSRA LSRX LSR opr,X LSR ,X MUL NEG opr NEGA NEGX NEG opr,X NEG ,X NOP ORA #opr ORA opr ORA opr ORA opr,X ORA opr,X ORA ,X Logical Shift Left (Same as ASL) C b7 b0 0 ---- ff dd Logical Shift Right 0 b7 b0 C ---- 0 ff Unsigned Multiply X : A (X) x (A) M -(M) = $00 - (M) A -(A) = $00 - (A) X -(X) = $00 - (X) M -(M) = $00 - (M) M -(M) = $00 - (M) 0 ------ 0 Negate Byte (Two's Complement) ---- ff No Operation ---------- Logical OR Accumulator with Memory A (A) (M) ---- -- AA ii 2 BA dd 3 CA hh ll 4 DA ee ff 5 EA ff 4 FA 3 Technical Data 64 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Cycles Effect on CCR Operand Address Mode Opcode Central Processor Unit (CPU) Instruction Set Summary Table 3-6. Instruction Set Summary (Sheet 5 of 6) Source Form ROL opr ROLA ROLX ROL opr,X ROL ,X ROR opr RORA RORX ROR opr,X ROR ,X RSP Operation Description H I NZC Rotate Byte Left through Carry Bit C b7 b0 ---- DIR INH INH IX1 IX DIR INH INH IX1 IX INH 39 49 59 69 79 36 46 56 66 76 9C dd ff 5 3 3 6 5 5 3 3 6 5 2 dd Rotate Byte Right through Carry Bit b7 b0 C ---- ff Reset Stack Pointer SP $00FF SP (SP) + 1; Pull (CCR) SP (SP) + 1; Pull (A) SP (SP) + 1; Pull (X) SP (SP) + 1; Pull (PCH) SP (SP) + 1; Pull (PCL) SP (SP) + 1; Pull (PCH) SP (SP) + 1; Pull (PCL) ---------- RTI Return from Interrupt INH 80 9 RTS SBC #opr SBC opr SBC opr SBC opr,X SBC opr,X SBC ,X SEC SEI STA opr STA opr STA opr,X STA opr,X STA ,X STOP STX STX STX STX STX opr opr opr,X opr,X ,X Return from Subroutine ---------- INH IMM DIR EXT IX2 IX1 IX INH INH DIR EXT IX2 IX1 IX INH DIR EXT IX2 IX1 IX IMM DIR EXT IX2 IX1 IX 81 6 Subtract Memory Byte and Carry Bit from Accumulator A (A) - (M) - (C) ---- ii A2 2 B2 dd 3 C2 hh ll 4 D2 ee ff 5 E2 ff 4 F2 3 99 9B 2 2 Set Carry Bit Set Interrupt Mask C1 I1 -------- 1 -- 1 ------ Store Accumulator in Memory M (A) ---- -- B7 dd 4 C7 hh ll 5 D7 ee ff 6 E7 ff 5 F7 4 8E 2 Stop Oscillator and Enable IRQ Pin -- 0 ------ Store Index Register In Memory M (X) ---- -- BF dd 4 CF hh ll 5 DF ee ff 6 EF ff 5 FF 4 ii A0 2 B0 dd 3 C0 hh ll 4 D0 ee ff 5 E0 ff 4 F0 3 SUB #opr SUB opr SUB opr SUB opr,X SUB opr,X SUB ,X Subtract Memory Byte from Accumulator A (A) - (M) ---- MC68HC705J1A -- Rev. 4.0 MOTOROLA Central Processor Unit (CPU) Technical Data 65 Cycles Effect on CCR Operand Address Mode Opcode Central Processor Unit (CPU) Table 3-6. Instruction Set Summary (Sheet 6 of 6) Source Form Operation Description Cycles 10 2 dd 4 3 3 5 4 2 2 Effect on CCR H I NZC SWI Software Interrupt PC (PC) + 1; Push (PCL) SP (SP) - 1; Push (PCH) SP (SP) - 1; Push (X) SP (SP) - 1; Push (A) -- 1 ------ SP (SP) - 1; Push (CCR) SP (SP) - 1; I 1 PCH Interrupt Vector High Byte PCL Interrupt Vector Low Byte X (A) ---------- INH 83 TAX TST opr TSTA TSTX TST opr,X TST ,X TXA WAIT A C CCR dd dd rr DIR ee ff EXT ff H hh ll I ii IMM INH IX IX1 IX2 M N n Transfer Accumulator to Index Register INH DIR INH INH IX1 IX INH INH 97 3D 4D 5D 6D 7D 9F 8F Test Memory Byte for Negative or Zero (M) - $00 ---- -- Transfer Index Register to Accumulator Stop CPU Clock and Enable Interrupts Accumulator Carry/borrow flag Condition code register Direct address of operand Direct address of operand and relative offset of branch instruction Direct addressing mode High and low bytes of offset in indexed, 16-bit offset addressing Extended addressing mode Offset byte in indexed, 8-bit offset addressing Half-carry flag High and low bytes of operand address in extended addressing Interrupt mask Immediate operand byte Immediate addressing mode Inherent addressing mode Indexed, no offset addressing mode Indexed, 8-bit offset addressing mode Indexed, 16-bit offset addressing mode Memory location Negative flag Any bit A (X) ---------- -- ------ opr PC PCH PCL REL rel rr SP X Z # () -( ) ? : -- Operand (one or two bytes) Program counter Program counter high byte Program counter low byte Relative addressing mode Relative program counter offset byte Relative program counter offset byte Stack pointer Index register Zero flag Immediate value Logical AND Logical OR Logical EXCLUSIVE OR Contents of Negation (two's complement) Loaded with If Concatenated with Set or cleared Not affected 3.8 Opcode Map See Table 3-7. Technical Data 66 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Operand ff Address Mode Opcode MOTOROLA Central Processor Unit (CPU) 67 MC68HC705J1A -- Rev. 4.0 Technical Data Table 3-7. Opcode Map Bit Manipulation DIR MSB LSB Branch REL 2 DIR 3 Read-Modify-Write INH 4 INH 5 IX1 6 IX 7 Control INH 8 9 RTI INH 6 RTS 1 INH Register/Memory IMM A 2 SUB IMM 2 2 CMP IMM 2 2 SBC IMM 2 2 CPX IMM 2 2 AND IMM 2 2 BIT IMM 2 2 LDA IMM 2 2 2 EOR IMM 2 2 ADC 2 IMM 2 2 ORA 2 IMM 2 2 ADD 2 IMM 2 2 2 6 BSR 2 REL 2 2 LDX 2 IMM 2 2 MSB LSB DIR 1 5 BSET0 DIR 5 BCLR0 2 DIR 5 BSET1 2 DIR 5 BCLR1 2 DIR 5 BSET2 2 DIR 5 BCLR2 2 DIR 5 BSET3 2 DIR 5 BCLR3 2 DIR 5 BSET4 2 DIR 5 BCLR4 2 DIR 5 BSET5 2 DIR 5 BCLR5 2 DIR 5 BSET6 2 DIR 5 BCLR6 2 DIR 5 BSET7 2 DIR 5 BCLR7 2 DIR 2 INH 9 DIR B 3 SUB DIR 3 3 CMP DIR 3 3 SBC DIR 3 3 CPX DIR 3 3 AND DIR 3 3 BIT DIR 3 3 LDA DIR 3 4 STA DIR 3 3 EOR DIR 3 3 ADC DIR 3 3 ORA DIR 3 3 ADD DIR 3 2 JMP DIR 3 5 JSR DIR 3 3 LDX DIR 3 4 STX DIR 3 EXT C 4 SUB EXT 3 4 CMP EXT 3 4 SBC EXT 3 4 CPX EXT 3 4 AND EXT 3 4 BIT EXT 3 4 LDA EXT 3 5 STA EXT 3 4 EOR EXT 3 4 ADC EXT 3 4 ORA EXT 3 4 ADD EXT 3 3 JMP EXT 3 6 JSR EXT 3 4 LDX EXT 3 5 STX EXT 3 IX2 D 5 SUB IX2 2 5 CMP IX2 2 5 SBC IX2 2 5 CPX IX2 2 5 AND IX2 2 5 BIT IX2 2 5 LDA IX2 2 6 STA IX2 2 5 EOR IX2 2 5 ADC IX2 2 5 ORA IX2 2 5 ADD IX2 2 4 JMP IX2 2 7 JSR IX2 2 5 LDX IX2 2 6 STX IX2 2 IX1 E 4 SUB IX1 4 CMP IX1 4 SBC IX1 4 CPX IX1 4 AND IX1 4 BIT IX1 4 LDA IX1 5 STA IX1 4 EOR IX1 4 ADC IX1 4 ORA IX1 4 ADD IX1 3 JMP IX1 6 JSR IX1 4 LDX IX1 5 STX IX1 IX F 3 SUB 1 CMP 1 SBC 1 CPX 1 AND 1 BIT 1 LDA 1 STA 1 EOR 1 ADC 1 ORA 1 ADD 1 JMP 1 JSR 1 LDX 1 STX 1 IX IX 4 IX 3 IX 5 IX 2 IX 3 IX 3 IX 3 IX 3 IX 4 IX 3 IX 3 IX 3 IX 3 IX 3 IX 3 MSB LSB 0 5 BRSET0 3 DIR 5 BRCLR0 3 DIR 5 BRSET1 3 DIR 5 BRCLR1 3 DIR 5 BRSET2 3 DIR 5 BRCLR2 3 DIR 5 BRSET3 3 DIR 5 BRCLR3 3 DIR 5 BRSET4 3 DIR 5 BRCLR4 3 DIR 5 BRSET5 3 DIR 5 BRCLR5 3 DIR 5 BRSET6 3 DIR 5 BRCLR6 3 DIR 5 BRSET7 3 DIR 5 BRCLR7 3 DIR 0 1 2 3 4 5 6 7 8 9 A B C D E F 5 3 NEG BRA DIR REL 2 3 BRN 2 REL 3 BHI 2 REL 5 3 COM BLS DIR 2 REL 2 5 3 LSR BCC DIR 2 REL 2 3 BCS/BLO 2 REL 5 3 ROR BNE DIR 2 REL 2 5 3 ASR BEQ DIR 2 REL 2 5 3 ASL/LSL BHCC DIR 2 REL 2 5 3 ROL BHCS DIR 2 REL 2 5 3 DEC BPL DIR 2 REL 2 3 BMI 2 REL 5 3 INC BMC DIR 2 REL 2 4 3 TST BMS DIR 2 REL 2 3 BIL 2 REL 5 3 CLR BIH DIR 2 REL 2 2 1 5 6 3 3 NEG NEG NEGX NEGA IX 1 IX1 1 INH 2 INH 1 0 1 2 3 4 5 6 7 8 9 A B C 2 2 2 2 2 2 11 MUL 1 INH 10 5 6 3 3 SWI COM COM COMX COMA INH IX 1 IX1 1 INH 2 1 INH 1 5 6 3 3 LSR LSR LSRX LSRA IX IX1 1 INH 2 1 INH 1 6 3 3 ROR RORX RORA IX1 INH 2 1 INH 1 6 3 3 ASR ASRX ASRA IX1 INH 2 1 INH 1 6 3 3 ASLA/LSLA ASLX/LSLX ASL/LSL IX1 INH 2 1 INH 1 6 3 3 ROL ROLX ROLA IX1 INH 2 1 INH 1 6 3 3 DEC DECX DECA IX1 INH 2 1 INH 1 5 ROR 1 ASR IX 5 ASL/LSL 1 IX 5 ROL 1 IX 5 DEC 1 IX 1 1 1 1 1 1 IX 5 2 2 TAX INH 2 CLC INH 2 SEC INH 2 CLI INH 2 SEI INH 2 RSP INH 2 NOP INH 5 6 3 3 INC INC INCX INCA IX IX1 1 INH 2 INH 1 4 5 3 3 TST TST TSTX TSTA IX IX1 1 INH 2 1 INH 1 1 1 1 Central Processor Unit (CPU) Opcode Map D E F 2 STOP 1 INH 2 2 5 6 3 3 TXA WAIT CLR CLR CLRX CLRA INH INH 1 IX 1 IX1 1 INH 2 1 INH 1 INH = Inherent IMM = Immediate DIR = Direct EXT = Extended REL = Relative IX = Indexed, No Offset IX1 = Indexed, 8-Bit Offset IX2 = Indexed, 16-Bit Offset 0 MSB of Opcode in Hexadecimal LSB of Opcode in Hexadecimal 0 5 Number of Cycles BRSET0 Opcode Mnemonic 3 DIR Number of Bytes/Addressing Mode Central Processor Unit (CPU) Technical Data 68 Central Processor Unit (CPU) MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 4. Resets and Interrupts 4.1 Contents 4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 4.3 Resets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 4.3.1 Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71 4.3.2 External Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4.3.3 COP Watchdog Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4.3.4 Illegal Address Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4.4 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.1 Software Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.2 External Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73 4.4.3 Timer Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4.3.1 Real-Time Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4.3.2 Timer Overflow Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4.4 Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.2 Introduction Reset initializes the microcontroller unit (MCU) by returning the program counter to a known address and by forcing control and status bits to known states. Interrupts temporarily change the sequence of program execution to respond to events that occur during processing. MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Technical Data 69 Resets and Interrupts 4.3 Resets A reset immediately stops the operation of the instruction being executed, initializes certain control and status bits, and loads the program counter with a user-defined reset vector address. These sources can generate a reset: * * * * Power-on reset (POR) circuit RESET pin Computer operating properly (COP) watchdog Illegal address ILLEGAL ADDRESS COP WATCHDOG VDD RESET PIN INTERNAL CLOCK POWER-ON RESET S RST TO CPU AND PERIPHERAL MODULES D CK Q RESET LATCH Figure 4-1. Reset Sources Technical Data 70 Resets and Interrupts MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Resets 4.3.1 Power-On Reset A positive transition on the VDD pin generates a power-on reset. NOTE: The power-on reset is strictly for power-up conditions and cannot be used to detect drops in power supply voltage. A 4064-tcyc (internal clock cycle) delay after the oscillator becomes active allows the clock generator to stabilize. If any reset source is active at the end of this delay, the MCU remains in the reset condition until all reset sources are inactive. VDD (NOTE 1) OSC1 PIN INTERNAL CLOCK INTERNAL ADDRESS BUS INTERNAL DATA BUS OSCILLATOR STABILIZATION DELAY $07FE $07FE $07FE $07FE $07FE $07FE $07FF NEW PCH NEW PCL Notes: 1. Power-on reset threshold is typically between 1 V and 2 V. 2. Internal clock, internal address bus, and internal data bus are not available externally. Figure 4-2. Power-On Reset Timing MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Technical Data 71 Resets and Interrupts 4.3.2 External Reset A logic 0 applied to the RESET pin for 1 1/2 tcyc generates an external reset. A Schmitt trigger senses the logic level at the RESET pin. INTERNAL CLOCK INTERNAL ADDRESS BUS INTERNAL DATA BUS tRL RESET Notes: 1. Internal clock, internal address bus, and internal data bus are not available externally. 2. The next rising edge of the internal clock after the rising edge of RESET initiates the reset sequence. $07FE $07FE $07FE $07FE $07FF NEW PC NEW PC NEW PCH NEW PCL DUMMY OP CODE Figure 4-3. External Reset Timing Table 4-1. External Reset Timing Characteristic RESET pulse width Symbol tRL Min 1.5 Max -- Unit tcyc 4.3.3 COP Watchdog Reset A timeout of the COP watchdog generates a COP reset. The COP watchdog is part of a software error detection system and must be cleared periodically to start a new timeout period. To clear the COP watchdog and prevent a COP reset, write a logic 0 to bit 0 (COPC) of the COP register at location $07F0. 4.3.4 Illegal Address Reset An opcode fetch from an address not in random-access memory (RAM) or erasable, programmable read-only memory (EPROM) generates a reset. Technical Data 72 Resets and Interrupts MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Interrupts 4.4 Interrupts These sources can generate interrupts: * * Software interrupt (SWI) instruction External interrupt pins: - IRQ/VPP - PA0-PA3 * Timer: - Real-time interrupt flag (RTIF) - Timer overflow flag (TOF) An interrupt temporarily stops the program sequence to process a particular event. An interrupt does not stop the operation of the instruction being executed, but takes effect when the current instruction completes its execution. Interrupt processing automatically saves the CPU registers on the stack and loads the program counter with a user-defined interrupt vector address. 4.4.1 Software Interrupt The software interrupt (SWI) instruction causes a non-maskable interrupt. 4.4.2 External Interrupt An interrupt signal on the IRQ/VPP pin latches an external interrupt request. When the CPU completes its current instruction, it tests the IRQ latch. If the IRQ latch is set, the CPU then tests the I bit in the condition code register. If the I bit is clear, the CPU then begins the interrupt sequence. MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Technical Data 73 Resets and Interrupts The CPU clears the IRQ latch during interrupt processing, so that another interrupt signal on the IRQ/VPP pin can latch another interrupt request during the interrupt service routine. As soon as the I bit is cleared during the return from interrupt, the CPU can recognize the new interrupt request. Figure 4-4 shows the IRQ/VPP pin interrupt logic. TO BIH & BIL INSTRUCTION PROCESSING LEVEL-SENSITIVE TRIGGER (MOR LEVEL BIT) VDD PA3 PA2 PA1 PA0 PIRQ (MOR) D IRQ Q LATCH CK IRQE CLR IRQF EXTERNAL INTERRUPT REQUEST IRQ RESET IRQ VECTOR FETCH IRQR Figure 4-4. External Interrupt Logic Setting the I bit in the condition code register disables external interrupts. The port A external interrupt bit (PIRQ) in the mask option register enables pins PA0-PA3 to function as external interrupt pins. The external interrupt sensitivity bit (LEVEL) in the mask option register controls interrupt triggering sensitivity of external interrupt pins. The IRQ/VPP pin can be negative-edge triggered only or negative-edge and low-level triggered. Port A external interrupt pins can be positive-edge triggered only or both positive-edge and high-level triggered. The level-sensitive triggering option allows multiple external interrupt sources to be wire-ORed to an external interrupt pin. An external interrupt request, shown in Figure 4-5, is latched as long as any source is holding an external interrupt pin low. Technical Data 74 Resets and Interrupts MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Interrupts tILIL IRQ PIN tILIH IRQ1 . tILIH . . IRQn IRQ (INTERNAL) Figure 4-5. External Interrupt Timing Table 4-2. External Interrupt Timing (VDD = 5.0 Vdc)(1) Characteristic Interrupt pulse width low (edge-triggered) Interrupt pulse period Symbol tILIH tILIL Min 125 Note(2) Max -- -- Unit ns tcyc 1. V DD = 5.0 Vdc 10%, VSS = 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. The minimum, tILIL, should not be less than the number of interrupt service routine cycles plus 19 tcyc. Table 4-3. External Interrupt Timing (VDD = 3.3 Vdc)(1) Characteristic Interrupt pulse width low (edge-triggered) Interrupt pulse period Symbol tILIH tILIL Min 250 Note(2) Max -- -- Unit ns tcyc 1. V DD = 3.3 Vdc 10%, VSS = 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. The minimum, tILIL, should not be less than the number of interrupt service routine cycles plus 19 tcyc. MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Technical Data 75 Resets and Interrupts 4.4.3 Timer Interrupts The timer can generate these interrupt requests: * * Real time Timer overflow Setting the I bit in the condition code register disables timer interrupts. 4.4.3.1 Real-Time Interrupt A real-time interrupt occurs if the real-time interrupt flag, RTIF, becomes set while the real-time interrupt enable bit, RTIE, is also set. RTIF and RTIE are in the timer status and control register. 4.4.3.2 Timer Overflow Interrupt A timer overflow interrupt request occurs if the timer overflow flag, TOF, becomes set while the timer overflow interrupt enable bit, TOIE, is also set. TOF and TOIE are in the timer status and control register. 4.4.4 Interrupt Processing The CPU takes these actions to begin servicing an interrupt: * * * Stores the CPU registers on the stack in the order shown in Figure 4-6 Sets the I bit in the condition code register to prevent further interrupts Loads the program counter with the contents of the appropriate interrupt vector locations: - $07FC and $07FD (software interrupt vector) - $07FA and $07FB (external interrupt vector) - $07F8 and $07F9 (timer interrupt vector) The return-from-interrupt (RTI) instruction causes the CPU to recover the CPU registers from the stack as shown in Figure 4-6. Technical Data 76 Resets and Interrupts MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Interrupts $00C0 (BOTTOM OF STACK) $00C1 $00C2 UNSTACKING ORDER * * * * * * 5 4 3 2 1 1 2 3 4 5 CONDITION CODE REGISTER ACCUMULATOR INDEX REGISTER PROGRAM COUNTER (HIGH BYTE) PROGRAM COUNTER (LOW BYTE) * STACKING ORDER * * * * * $00FD $00FE $00FF (TOP OF STACK) Figure 4-6. Interrupt Stacking Order Table 4-4. Reset/Interrupt Vector Addresses Function Source Power-on RESET pin COP watchdog(1) illegal address User code Local Mask Global Mask Priority (1 = Highest) Vector Address Reset None None 1 $07FE-$07FF Software interrupt (SWI) External interrupt Timer interrupts None None Same priority as instruction 2 3 $07FC-$07FD IRQ/VPP pin RTIF bit TOF bit IRQE RTIE bit TOIE bit I bit I bit $07FA-$07FB $07F8-$07F9 1. The COP watchdog is programmable in the mask option register. MC68HC705J1A -- Rev. 4.0 MOTOROLA Resets and Interrupts Technical Data 77 Resets and Interrupts FROM RESET YES I BIT SET? NO EXTERNAL INTERRUPT? NO YES CLEAR IRQ LATCH TIMER INTERRUPT? NO YES STACK PC, X, A, CCR SET I BIT LOAD PC WITH INTERRUPT VECTOR FETCH NEXT INSTRUCTION SWI INSTRUCTION? NO YES RTI INSTRUCTION? YES UNSTACK CCR, A, X, PC NO EXECUTE INSTRUCTION Figure 4-7. Interrupt Flowchart Technical Data 78 Resets and Interrupts MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 5. Low-Power Modes 5.1 Contents 5.2 5.3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Exiting Stop and Wait Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 80 5.4 Effects of Stop and Wait Modes . . . . . . . . . . . . . . . . . . . . . . . .81 5.4.1 Clock Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81 5.4.2 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 5.4.3 COP Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 5.4.4 Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 5.4.5 EPROM/OTPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 5.4.6 Data-Retention Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 5.5 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 5.2 Introduction The microcontroller unit (MCU) can enter these low-power standby modes: * * * Stop mode -- The STOP instruction puts the MCU in its lowest power-consumption mode. Wait mode -- The WAIT instruction puts the MCU in an intermediate power-consumption mode. Halt mode -- Halt mode is identical to wait mode, except that an oscillator stabilization delay of 1 to 4064 internal clock cycles occurs when the MCU exits halt mode. The stop-to-wait conversion bit, SWAIT, in the mask option register, enables halt mode. MC68HC705J1A -- Rev. 4.0 MOTOROLA Low-Power Modes Technical Data 79 Low-Power Modes Enabling halt mode prevents the computer operating properly (COP) watchdog from being inadvertently turned off by a STOP instruction. * Data-retention mode -- In data-retention mode, the MCU retains RAM contents and CPU register contents at VDD voltages as low as 2.0 Vdc. The data-retention feature allows the MCU to remain in a low power-consumption state during which it retains data, but the CPU cannot execute instructions. 5.3 Exiting Stop and Wait Modes The events described in this subsection bring the MCU out of stop mode and load the program counter with the reset vector or with an interrupt vector. Exiting stop mode: * External reset -- A logic 0 on the RESET pin resets the MCU, starts the CPU clock, and loads the program counter with the contents of locations $07FE and $07FF. External interrupt -- A high-to-low transition on the IRQ/VPP pin or a low-to-high transition on an enabled port A external interrupt pin starts the CPU clock and loads the program counter with the contents of locations $07FA and $07FB. * Exiting wait mode: * External reset -- A logic 0 on the RESET pin resets the MCU, starts the CPU clock, and loads the program counter with the contents of locations $07FE and $07FF. External interrupt -- A high-to-low transition on the IRQ/VPP pin or a low-to-high transition on an enabled port A external interrupt pin starts the CPU clock and loads the program counter with the contents of locations $07FA and $07FB. * Technical Data 80 Low-Power Modes MC68HC705J1A -- Rev. 4.0 MOTOROLA Low-Power Modes Effects of Stop and Wait Modes * COP watchdog reset -- A timeout of the COP watchdog resets the MCU, starts the CPU clock, and loads the program counter with the contents of locations $07FE and $07FF. Software can enable timer interrupts so that the MCU periodically can exit wait mode to reset the COP watchdog. Timer interrupt -- Real-time interrupt requests and timer overflow interrupt requests start the MCU clock and load the program counter with the contents of locations $07F8 and $07F9. * 5.4 Effects of Stop and Wait Modes The STOP and WAIT instructions have the effects described in this subsection on MCU modules. 5.4.1 Clock Generation The STOP instruction: The STOP instruction disables the internal oscillator, stopping the CPU clock and all peripheral clocks. After exiting stop mode, the CPU clock and all enabled peripheral clocks begin running after the oscillator stabilization delay. NOTE: The oscillator stabilization delay holds the MCU in reset for the first 4064 internal clock cycles. The WAIT instruction: The WAIT instruction disables the CPU clock. After exiting wait mode, the CPU clock and all enabled peripheral clocks immediately begin running. MC68HC705J1A -- Rev. 4.0 MOTOROLA Low-Power Modes Technical Data 81 Low-Power Modes 5.4.2 CPU The STOP instruction: * * Clears the interrupt mask (I bit) in the condition code register, enabling external interrupts Disables the CPU clock After exiting stop mode, the CPU clock begins running after the oscillator stabilization delay. After exit from stop mode by external interrupt, the I bit remains clear. After exit from stop mode by reset, the I bit is set. The WAIT instruction: * * Clears the interrupt mask (I bit) in the condition code register, enabling interrupts Disables the CPU clock After exit from wait mode by interrupt, the I bit remains clear. After exit from wait mode by reset, the I bit is set. 5.4.3 COP Watchdog The STOP instruction: * * Clears the COP watchdog counter Disables the COP watchdog clock NOTE: To prevent the STOP instruction from disabling the COP watchdog, program the stop-to-wait conversion bit (SWAIT) in the mask option register to logic 1. After exit from stop mode by external interrupt, the COP watchdog counter immediately begins counting from $0000 and continues counting throughout the oscillator stabilization delay. NOTE: Immediately after exiting stop mode by external interrupt, service the COP to ensure a full COP timeout period. Technical Data 82 Low-Power Modes MC68HC705J1A -- Rev. 4.0 MOTOROLA Low-Power Modes Effects of Stop and Wait Modes After exit from stop mode by reset: * * The COP watchdog counter immediately begins counting from $0000. The COP watchdog counter is cleared at the end of the oscillator stabilization delay and begins counting from $0000 again. The WAIT instruction: The WAIT instruction has no effect on the COP watchdog. NOTE: To prevent a COP timeout during wait mode, exit wait mode periodically to service the COP. 5.4.4 Timer The STOP instruction: * Clears the RTIE, TOFE, RTIF, and TOF bits in the timer status and control register, disabling timer interrupt requests and removing any pending timer interrupt requests Disables the clock to the timer * After exiting stop mode by external interrupt, the timer immediately resumes counting from the last value before the STOP instruction and continues counting throughout the oscillator stabilization delay. After exiting stop mode by reset and after the oscillator stabilization delay, the timer resumes operation from its reset state. The WAIT instruction: The WAIT instruction has no effect on the timer. MC68HC705J1A -- Rev. 4.0 MOTOROLA Low-Power Modes Technical Data 83 Low-Power Modes 5.4.5 EPROM/OTPROM The STOP instruction: The STOP instruction during erasable, programmable read-only memory (EPROM) programming clears the EPGM bit in the EPROM programming register, removing the programming voltage from the EPROM. The WAIT instruction: The WAIT instruction has no effect on EPROM/one-time programmable read-only memory (OTPROM) operation. 5.4.6 Data-Retention Mode In data-retention mode, the MCU retains random-access memory (RAM) contents and CPU register contents at VDD voltages as low as 2.0 Vdc. The data-retention feature allows the MCU to remain in a low power-consumption state during which it retains data, but the CPU cannot execute instructions. To put the MCU in data-retention mode: 1. Drive the RESET pin to logic 0. 2. Lower the VDD voltage. The RESET pin must remain low continuously during data-retention mode. To take the MCU out of data-retention mode: 1. Return VDD to normal operating voltage. 2. Return the RESET pin to logic 1. Technical Data 84 Low-Power Modes MC68HC705J1A -- Rev. 4.0 MOTOROLA Low-Power Modes Timing 5.5 Timing OSC (NOTE 1) tRL RESET tILIH OSCILLATOR STABILIZATION DELAY IRQ/VPP (NOTE 3) INTERNAL CLOCK INTERNAL ADDRESS BUS $07FE (NOTE 4) IRQ/VPP (NOTE 2) $07FE $07FE $07FE $07FE $07FF Notes: 1. Internal clocking from OSC1 pin 2. Edge-triggered external interrupt mask option 3. Edge- and level-triggered external interrupt mask option 4. Reset vector shown as example RESET OR INTERRUPT VECTOR FETCH Figure 5-1. Stop Mode Recovery Timing MC68HC705J1A -- Rev. 4.0 MOTOROLA Low-Power Modes Technical Data 85 Low-Power Modes STOP SWAIT BIT SET? NO YES HALT WAIT CLEAR I BIT IN CCR SET IRQE BIT IN ISCR CLEAR TOF, RTIF, TOIE, AND RTIE BITS IN TSCR TURN OFF INTERNAL OSCILLATOR CLEAR I BIT IN CCR SET IRQE BIT IN ISCR TURN OFF CPU CLOCK TIMER CLOCK ACTIVE CLEAR I BIT IN CCR SET IRQE BIT IN ISCR TURN OFF CPU CLOCK TIMER CLOCK ACTIVE YES EXTERNAL RESET? NO YES EXTERNAL INTERRUPT? NO YES TURN ON INTERNAL OSCILLATOR RESET STABILIZATION TIMER YES YES EXTERNAL RESET? NO YES EXTERNAL RESET? NO EXTERNAL INTERRUPT? NO YES EXTERNAL INTERRUPT? NO TIMER INTERRUPT? NO YES TIMER INTERRUPT? NO YES END OF STABILIZATION DELAY? NO YES COP RESET? NO YES COP RESET? NO TURN ON CPU CLOCK 1. LOAD PC WITH RESET VECTOR OR 2. SERVICE INTERRUPT a. SAVE CPU REGISTERS ON STACK b. SET I BIT IN CCR c. LOAD PC WITH INTERRUPT VECTOR Figure 5-2. Stop/Halt/Wait Flowchart Technical Data 86 Low-Power Modes MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 6. Parallel Input/Output (I/O) Ports 6.1 Contents 6.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 6.3 Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 6.3.1 Port A Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 6.3.2 Data Direction Register A. . . . . . . . . . . . . . . . . . . . . . . . . . . 90 6.3.3 Pulldown Register A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 6.3.4 Port A LED Drive Capability . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.3.5 Port A I/O Pin Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.4 Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.4.1 Port B Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 6.4.2 Data Direction Register B. . . . . . . . . . . . . . . . . . . . . . . . . . . 93 6.4.3 Pulldown Register B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 6.5 6.6 5.0-Volt I/O Port Electrical Characteristics . . . . . . . . . . . . . . . . 95 3.3-Volt I/O Port Electrical Characteristics . . . . . . . . . . . . . . . . 95 6.2 Introduction Fourteen bidirectional pins form one 8-bit input/output (I/O) port and one 6-bit I/O port. All the bidirectional port pins are programmable as inputs or outputs. NOTE: Connect any unused I/O pins to an appropriate logic level, either VDD or VSS. Although the I/O ports do not require termination for proper operation, termination reduces excess current consumption and the possibility of electrostatic damage. MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Technical Data 87 Parallel Input/Output (I/O) Ports Addr. Register Name Read: Port A Data Register (PORTA) Write: See page 89. Reset: Read: Port B Data Register (PORTB) Write: See page 92. Reset: Bit 7 PA7 6 PA6 5 PA5 4 PA4 3 PA3 2 PA2 1 PA1 Bit 0 PA0 $0000 Unaffected by reset 0 0 PB5 PB4 PB3 PB2 PB1 PB0 $0001 Unaffected by reset DDRA6 0 0 DDRB5 0 0 0 DDRB4 0 DDRB3 0 DDRB2 0 DDRB1 0 DDRB0 0 DDRA5 0 DDRA4 0 DDRA3 0 DDRA2 0 DDRA1 0 DDRA0 0 Read: Data Direction Register A DDRA7 $0004 (DDRA) Write: See page 90. Reset: 0 Read: Data Direction Register B $0005 (DDRB) Write: See page 93. Reset: Read: Pulldown Register A (PDRA) Write: See page 91. Reset: Read: Pulldown Register B (PDRB) Write: See page 94. Reset: 0 $0010 PDIA7 0 PDIA6 0 PDIA5 0 PDIA4 0 PDIA3 0 PDIA2 0 PDIA1 0 PDIA0 0 $0011 PDIB5 0 = Unimplemented PDIB4 0 PDIB3 0 PDIB2 0 PDIB1 0 PDIB0 0 Figure 6-1. Parallel I/O Port Register Summary Technical Data 88 Parallel Input/Output (I/O) Ports MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Port A 6.3 Port A Port A is an 8-bit bidirectional port. 6.3.1 Port A Data Register The port A data register (PORTA) contains a latch for each port A pin. Address: $0000 Bit 7 Read: PA7 Write: Reset: Unaffected by reset PA6 PA5 PA4 PA3 PA2 PA1 PA0 6 5 4 3 2 1 Bit 0 Figure 6-2. Port A Data Register (PORTA) PA[7:0] -- Port A Data Bits These read/write bits are software programmable. Data direction of each port A pin is under the control of the corresponding bit in data direction register A. Reset has no effect on port A data. MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Technical Data 89 Parallel Input/Output (I/O) Ports 6.3.2 Data Direction Register A Data direction register A (DDRA) determines whether each port A pin is an input or an output. Address: $0004 Bit 7 Read: DDRA7 Write: Reset: 0 0 0 0 0 0 0 0 DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0 6 5 4 3 2 1 Bit 0 Figure 6-3. Data Direction Register A (DDRA) DDRA[7:0] -- Data Direction Register A Bits These read/write bits control port A data direction. Reset clears DDRA[7:0], configuring all port A pins as inputs. 1 = Corresponding port A pin configured as output 0 = Corresponding port A pin configured as input NOTE: Avoid glitches on port A pins by writing to the port A data register before changing data direction register A bits from 0 to 1. Figure 6-4 shows the I/O logic of port A. READ DDRA WRITE DDRA DDRAx INTERNAL DATA BUS WRITE PORTA PAx 10-mA SINK CAPABILITY (PINS PA4-PA7 ONLY) PAx (PA0-PA3 TO IRQ MODULE) READ PORTA WRITE PDRA PDRAx RESET SWPDI 100-A PULLDOWN Figure 6-4. Port A I/O Circuitry Technical Data 90 Parallel Input/Output (I/O) Ports MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Port A Writing a logic 1 to a DDRA bit enables the output buffer for the corresponding port A pin; a logic 0 disables the output buffer. When bit DDRAx is a logic 1, reading address $0000 reads the PAx data latch. When bit DDRAx is a logic 0, reading address $0000 reads the voltage level on the pin. The data latch can always be written, regardless of the state of its data direction bit. Table 6-1 summarizes the operation of the port A pins. Table 6-1. Port A Pin Operation Accesses to Data Bit Data Direction Bit 0 1 I/O Pin Mode Input, high-impedance Output Read Pin Latch Write Latch(1) Latch 1. Writing affects the data register but does not affect input. 6.3.3 Pulldown Register A Pulldown register A (PDRA) inhibits the pulldown devices on port A pins programmed as inputs. NOTE: If the SWPDI bit in the mask option register is programmed to logic 1, reset initializes all port A pins as inputs with disabled pulldown devices. Address: $0010 Bit 7 Read: Write: Reset: PDIA7 0 PDIA6 0 PDIA5 0 PDIA4 0 PDIA3 0 PDIA2 0 PDIA1 0 PDIA0 0 6 5 4 3 2 1 Bit 0 = Unimplemented Figure 6-5. Pulldown Register A (PDRA) PDIA[7:0] -- Pulldown Inhibit A Bits PDIA[7:0] disable the port A pulldown devices. Reset clears PDIA[7:0]. 1 = Corresponding port A pulldown device disabled 0 = Corresponding port A pulldown device not disabled MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Technical Data 91 Parallel Input/Output (I/O) Ports 6.3.4 Port A LED Drive Capability The outputs for the upper four bits of port A (PA4-PA7) can drive light-emitting diodes (LEDs). PA4-PA7 can sink approximately 10 mA of current to VSS. 6.3.5 Port A I/O Pin Interrupts If the PIRQ bit in the mask option register is programmed to logic 1, PA0-PA3 pins function as external interrupt pins. See Section 8. External Interrupt Module (IRQ). 6.4 Port B Port B is a 6-bit bidirectional port. 6.4.1 Port B Data Register The port B data register (PORTB) contains a latch for each port B pin. Address: $0001 Bit 7 Read: Write: Reset: = Unimplemented Unaffected by reset 0 6 0 PB5 PB4 PB3 PB2 PB1 PB0 5 4 3 2 1 Bit 0 Figure 6-6. Port B Data Register (PORTB) PB[5:0] -- Port B Data Bits These read/write bits are software programmable. Data direction of each port B pin is under the control of the corresponding bit in data direction register B. Reset has no effect on port B data. Technical Data 92 Parallel Input/Output (I/O) Ports MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Port B 6.4.2 Data Direction Register B Data direction register B (DDRB) determines whether each port B pin is an input or an output. Address: $0005 Bit 7 Read: Write: Reset: 0 0 0 0 0 0 0 0 0 6 0 DDRB5 DDRB4 DDRB3 DDRB2 DDRB1 DDRB0 5 4 3 2 1 Bit 0 = Unimplemented Figure 6-7. Data Direction Register B (DDRB) DDRB[5:0] -- Data Direction Register B Bits These read/write bits control port B data direction. Reset clears DDRB[5:0], configuring all port B pins as inputs. 1 = Corresponding port B pin configured as output 0 = Corresponding port B pin configured as input NOTE: Avoid glitches on port B pins by writing to the port B data register before changing data direction register B bits from 0 to 1. Figure 6-8 shows the I/O logic of port B. READ DDRB WRITE DDRB DDRBx INTERNAL DATA BUS WRITE PORTB PBx PBx READ PORTB WRITE PDRB PDRBx RESET SWPDI 100-A PULLDOWN Figure 6-8. Port B I/O Circuitry MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Technical Data 93 Parallel Input/Output (I/O) Ports Writing a logic 1 to a DDRB bit enables the output buffer for the corresponding port B pin; a logic 0 disables the output buffer. When bit DDRBx is a logic 1, reading address $0001 reads the PBx data latch. When bit DDRBx is a logic 0, reading address $0001 reads the voltage level on the pin. The data latch can always be written, regardless of the state of its data direction bit. Table 6-2 summarizes the operation of the port B pins. Table 6-2. Port B Pin Operation Data Direction Bit 0 1 I/O Pin Mode Input, high-impedance Output Accesses to Data Bit Read Pin Latch Write Latch(1) Latch 1. Writing affects the data register, but does not affect input. 6.4.3 Pulldown Register B Pulldown register B (PDRB) inhibits the pulldown devices on port B pins programmed as inputs. NOTE: If the SWPDI bit in the mask option register is programmed to logic 1, reset initializes all port B pins as inputs with disabled pulldown devices. Address: $0011 Bit 7 Read: Write: Reset: PDIB5 0 = Unimplemented PDIB4 0 PDIB3 0 PDIB2 0 PDIB1 0 PDIB0 0 6 5 4 3 2 1 Bit 0 Figure 6-9. Pulldown Register B (PDRB) PDIB[7:0] -- Pulldown Inhibit B Bits PDIB[7:0] disable the port B pulldown devices. Reset clears PDIB[7:0]. 1 = Corresponding port B pulldown device disabled 0 = Corresponding port B pulldown device not disabled Technical Data 94 Parallel Input/Output (I/O) Ports MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports 5.0-Volt I/O Port Electrical Characteristics 6.5 5.0-Volt I/O Port Electrical Characteristics Characteristic(1) Current drain per pin excluding PA4-PA7 Output high voltage (ILoad = -0.8 mA) PA0-PA7, PB0-PB5 Output low voltage (ILoad = 1.6 mA) PA0-PA3, PB0-PB5 (ILoad = 10.0 mA) PA4-PA7 Input high voltage PA0-PA7, PB0-PB5 Input low voltage PA0-PA7, PB0-PB5 I/O ports hi-z leakage current PA0-PA7, PB0-PB5 (without individual pulldown activated) Input pulldown current PA0-PA7, PB0-PB5 (with individual pulldown activated) Symbol I VOH Min -- VDD -0.8 Typ(2) 25 -- Max -- -- Unit mA V VOL VIH VIL IIL IIL -- -- 0.7 x VDD VSS -- 35 -- -- -- -- 0.2 80 0.4 0.4 VDD 0.2 x VDD 1 200 V V V A A 1. V DD = 5.0 Vdc 10%, V SS = 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. Typical values reflect average measurements at midpoint of voltage range, 25C. 6.6 3.3-Volt I/O Port Electrical Characteristics Characteristic(1) Current drain per pin excluding PA4-PA7 Output high voltage (ILoad = -0.2 mA) PA0-PA7, PB0-PB5 Output low voltage (ILoad = 0.4 mA) PA0-PA3, PB0-PB5 (ILoad = 5.0 mA) PA4-PA7 Input high voltage PA0-PA7, PB0-PB5 Input low voltage PA0-PA7, PB0-PB5 I/O ports hi-z leakage current PA0-PA7, PB0-PB5 (without individual pulldown activated) Input pulldown current PA0-PA7, PB0-PB5 (with individual pulldown activated) Symbol I VOH Min -- VDD -0.3 Typ(2) 25 -- Max -- -- Unit mA V VOL -- -- 0.7 x VDD VSS -- 12 -- -- -- -- 0.1 30 0.3 0.3 VDD 0.2 x VDD 1 100 V VIH VIL IIL IIL V V A A 1. V DD = 3.3 Vdc 10%, V SS= 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. Typical values reflect average measurements at midpoint of voltage range, 25C. MC68HC705J1A -- Rev. 4.0 MOTOROLA Parallel Input/Output (I/O) Ports Technical Data 95 Parallel Input/Output (I/O) Ports Technical Data 96 Parallel Input/Output (I/O) Ports MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 7. Computer Operating Properly (COP) Module 7.1 Contents 7.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 7.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 7.3.1 COP Watchdog Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 7.3.2 COP Watchdog Timeout Period . . . . . . . . . . . . . . . . . . . . . . 98 7.3.3 Clearing the COP Watchdog . . . . . . . . . . . . . . . . . . . . . . . .98 7.4 7.5 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 COP Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99 7.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 7.6.1 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 7.6.2 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 7.2 Introduction The computer operating properly (COP) watchdog resets the microcontroller (MCU) in case of software failure. Software that is operating properly periodically services the COP watchdog and prevents COP reset. The COP watchdog function is programmable by the COPEN bit in the mask option register. Features include: * * Protection from runaway software Wait and halt mode operation MC68HC705J1A -- Rev. 4.0 MOTOROLA Computer Operating Properly (COP) Module Technical Data 97 Computer Operating Properly (COP) Module 7.3 Operation Operation of the COP is described in this subsection. 7.3.1 COP Watchdog Timeout Four counter stages at the end of the timer make up the COP watchdog. The COP resets the MCU if the timeout period occurs before the COP watchdog timer is cleared by application software and the IRQ/VPP pin voltage is between VSS and VDD. Periodically clearing the counter starts a new timeout period and prevents COP reset. A COP watchdog timeout indicates that the software is not executing instructions in the correct sequence. NOTE: The internal clock drives the COP watchdog. Therefore, the COP watchdog cannot generate a reset for errors that cause the internal clock to stop. The COP watchdog depends on a power supply voltage at or above a minimum specification and is not guaranteed to protect against brownout. 7.3.2 COP Watchdog Timeout Period The COP watchdog timer function is implemented by dividing the output of the real-time interrupt circuit (RTI) by eight. The RTI select bits in the timer status and control register control RTI output, and the selected output drives the COP watchdog. See timer status and control register in Section 9. Multifunction Timer Module. NOTE: The minimum COP timeout period is seven times the RTI period. The COP is cleared asynchronously with the value in the RTI divider; hence, the COP timeout period will vary between 7x and 8x the RTI period. 7.3.3 Clearing the COP Watchdog To clear the COP watchdog and prevent a COP reset, write a logic 0 to bit 0 (COPC) of the COP register at location $07F0 (see Figure 7-1). Technical Data 98 Computer Operating Properly (COP) Module MC68HC705J1A -- Rev. 4.0 MOTOROLA Computer Operating Properly (COP) Module Interrupts Clearing the COP bit disables the COP watchdog timer regardless of the IRQ/VPP pin voltage. If the main program executes within the COP timeout period, the clearing routine should be executed only once. If the main program takes longer than the COP timeout period, the clearing routine must be executed more than once. NOTE: Place the clearing routine in the main program and not in an interrupt routine. Clearing the COP watchdog in an interrupt routine might prevent COP watchdog timeouts even though the main program is not operating properly. 7.4 Interrupts The COP watchdog does not generate interrupts. 7.5 COP Register The COP register (COPR) is a write-only register that returns the contents of EPROM location $07F0 when read. Address: $07F0 Bit 7 Read: Write: Reset: = Unimplemented COPC 0 6 5 4 3 2 1 Bit 0 Figure 7-1. COP Register (COPR) COPC -- COP Clear Bit This write-only bit resets the COP watchdog. Reading address $07F0 returns undefined results. MC68HC705J1A -- Rev. 4.0 MOTOROLA Computer Operating Properly (COP) Module Technical Data 99 Computer Operating Properly (COP) Module 7.6 Low-Power Modes The STOP and WAIT instructions have these effects on the COP watchdog. 7.6.1 Stop Mode The STOP instruction clears the COP watchdog counter and disables the clock to the COP watchdog. NOTE: To prevent the STOP instruction from disabling the COP watchdog, program the stop-to-wait conversion bit (SWAIT) in the mask option register to logic 1. Upon exit from stop mode by external reset: * * The counter begins counting from $0000. The counter is cleared again after the oscillator stabilization delay and begins counting from $0000 again. Upon exit from stop mode by external interrupt: * * The counter begins counting from $0000. The counter is not cleared again after the oscillator stabilization delay and continues counting throughout the oscillator stabilization delay. NOTE: Immediately after exiting stop mode by external interrupt, service the COP to ensure a full COP timeout period. 7.6.2 Wait Mode The WAIT instruction has no effect on the COP watchdog. NOTE: To prevent a COP timeout during wait mode, exit wait mode periodically to service the COP. Technical Data 100 Computer Operating Properly (COP) Module MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 8. External Interrupt Module (IRQ) 8.1 Contents 8.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 8.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 8.3.1 IRQ/VPP Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 8.3.2 Optional External Interrupts . . . . . . . . . . . . . . . . . . . . . . . . 104 8.4 IRQ Status and Control Register . . . . . . . . . . . . . . . . . . . . . . 106 8.5 External Interrupt Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 8.5.1 5.0-Volt External Interrupt Timing Characteristics . . . . . . . 107 8.5.2 3.3-Volt External Interrupt Timing Characteristics . . . . . . . 107 8.2 Introduction The external interrupt (IRQ) module provides asynchronous external interrupts to the CPU. These sources can generate external interrupts: * * IRQ/VPP pin PA0-PA3 pins Features include: * * * Dedicated external interrupt pin (IRQ/VPP) Selectable interrupt on four input/output (I/O) pins (PA0-PA3) Programmable edge-only or edge- and level-interrupt sensitivity MC68HC705J1A -- Rev. 4.0 MOTOROLA External Interrupt Module (IRQ) Technical Data 101 External Interrupt Module (IRQ) 8.3 Operation The interrupt request/programming voltage pin (IRQ/VPP) and port A pins 0-3 (PA0-PA3) provide external interrupts. The PIRQ bit in the mask option register (MOR) enables PA0-PA3 as IRQ interrupt sources, which are combined into a single ORing function to be latched by the IRQ latch. Figure 8-1 shows the structure of the IRQ module. After completing its current instruction, the CPU tests the IRQ latch. If the IRQ latch is set, the CPU then tests the I bit in the condition code register and the IRQE bit in the IRQ status and control register. If the I bit is clear and the IRQE bit is set, the CPU then begins the interrupt sequence. This interrupt is serviced by the interrupt service routine located at $07FA and $07FB. The CPU clears the IRQ latch while it fetches the interrupt vector, so that another external interrupt request can be latched during the interrupt service routine. As soon as the I bit is cleared during the return from interrupt, the CPU can recognize the new interrupt request. Figure 8-2 shows the sequence of events caused by an interrupt. IRQ LEVEL-SENSITIVE TRIGGER (MOR LEVEL BIT) IRQF VDD PA3 PA2 PA1 PA0 PIRQ (MOR) D IRQ Q LATCH CK IRQE CLR TO BIH & BIL INSTRUCTION PROCESSING EXTERNAL INTERRUPT REQUEST RESET IRQ VECTOR FETCH IRQR Figure 8-1. IRQ Module Block Diagram Technical Data 102 External Interrupt Module (IRQ) MC68HC705J1A -- Rev. 4.0 MOTOROLA External Interrupt Module (IRQ) Operation FROM RESET YES I BIT SET? NO EXTERNAL INTERRUPT? NO YES CLEAR IRQ LATCH TIMER INTERRUPT? NO YES STACK PCL, PCH, X, A, CCR SET I BIT LOAD PC WITH INTERRUPT VECTOR FETCH NEXT INSTRUCTION SWI INSTRUCTION? NO YES RTI INSTRUCTION? YES UNSTACK CCR, A, X, PCH, PCL NO EXECUTE INSTRUCTION Figure 8-2. Interrupt Flowchart MC68HC705J1A -- Rev. 4.0 MOTOROLA External Interrupt Module (IRQ) Technical Data 103 External Interrupt Module (IRQ) 8.3.1 IRQ/VPP Pin An interrupt signal on the IRQ/VPP pin latches an external interrupt request. The LEVEL bit in the mask option register provides negative edge-sensitive triggering or both negative edge-sensitive and low level-sensitive triggering for the interrupt function. If edge- and level-sensitive triggering is selected, a falling edge or a low level on the IRQ/VPP pin latches an external interrupt request. Edge- and level-sensitive triggering allows the use of multiple wired-OR external interrupt sources. An external interrupt request is latched as long as any source is holding the IRQ/VPP pin low. If level-sensitive triggering is selected, the IRQ/VPP input requires an external resistor to VDD for wired-OR operation. If the IRQ/VPP pin is not used, it must be tied to the VDD supply. If edge-sensitive-only triggering is selected, a falling edge on the IRQ/VPP pin latches an external interrupt request. A subsequent external interrupt request can be latched only after the voltage level on the IRQ/VPP pin returns to logic 1 and then falls again to logic 0. The IRQ/VPP pin contains an internal Schmitt trigger as part of its input to improve noise immunity. The voltage on this pin can affect the mode of operation and should not exceed VDD. 8.3.2 Optional External Interrupts The inputs for the lower four bits of port A (PA0-PA3) can be connected to the IRQ pin input of the CPU if enabled by the PIRQ bit in the mask option register. This capability allows keyboard scan applications where the transitions or levels on the I/O pins will behave the same as the IRQ/VPP pin except for the inverted phase (logic 1, rising edge). The active state of the IRQ/VPP pin is a logic 0 (falling edge). The PA0-PA3 pins are selected as a group to function as IRQ interrupts and are enabled by the IRQE bit in the IRQ status and control register. The PA0-PA3 pins can be positive-edge triggered only or positive-edge and high-level triggered. Technical Data 104 External Interrupt Module (IRQ) MC68HC705J1A -- Rev. 4.0 MOTOROLA External Interrupt Module (IRQ) Operation If edge- and level-sensitive triggering is selected, a rising edge or a high level on a PA0-PA3 pin latches an external interrupt request. Edge- and level-sensitive triggering allows the use of multiple wired-OR external interrupt sources. As long as any source is holding a PA0-PA3 pin high, an external interrupt request is latched, and the CPU continues to execute the interrupt service routine. If edge-sensitive only triggering is selected, a rising edge on a PA0-PA3 pin latches an external interrupt request. A subsequent external interrupt request can be latched only after the voltage level of the previous interrupt signal returns to logic 0 and then rises again to logic 1. NOTE: The branch if interrupt pin is high (BIH) and branch if interrupt pin is low (BIL) instructions apply only to the level on the IRQ/VPP pin itself and not to the output of the logic OR function with the PA0-PA3 pins. The state of the individual port A pins can be checked by reading the appropriate port A pins as inputs. Enabled PA0-PA3 pins cause an IRQ interrupt regardless of whether these pins are configured as inputs or outputs. The IRQ pin has an internal Schmitt trigger. The optional external interrupts (PA0-PA3) do not have internal Schmitt triggers. The interrupt mask bit (I) in the condition code register (CCR) disables all maskable interrupt requests, including external interrupt requests. MC68HC705J1A -- Rev. 4.0 MOTOROLA External Interrupt Module (IRQ) Technical Data 105 External Interrupt Module (IRQ) 8.4 IRQ Status and Control Register The IRQ status and control register (ISCR) controls and monitors operation of the IRQ module. All unused bits in the ISCR read as logic 0s. The IRQF bit is cleared and the IRQE bit is set by reset. Address: $000A Bit 7 Read: IRQE Write: Reset: 1 0 0 R 0 0 R = Reserved 0 IRQR 0 0 6 0 5 0 4 0 3 IRQF 2 0 1 0 Bit 0 0 = Unimplemented Figure 8-3. IRQ Status and Control Register (ISCR) IRQR -- Interrupt Request Reset Bit This write-only bit clears the external interrupt request flag. 1 = Clears external interrupt and IRQF bit 0 = No effect on external interrupt and IRQF bit IRQF -- External Interrupt Request Flag The external interrupt request flag is a clearable, read-only bit that is set when an external interrupt request is pending. Reset clears the IRQF bit. 1 = External interrupt request pending 0 = No external interrupt request pending IRQE -- External Interrupt Request Enable Bit This read/write bit enables external interrupts. Reset sets the IRQE bit. 1 = External interrupt requests enabled 0 = External interrupt requests disabled The STOP and WAIT instructions set the IRQE bit so that an external interrupt can bring the MCU out of these low-power modes. In addition, reset sets the I bit which masks all interrupt sources. Technical Data 106 External Interrupt Module (IRQ) MC68HC705J1A -- Rev. 4.0 MOTOROLA External Interrupt Module (IRQ) External Interrupt Timing 8.5 External Interrupt Timing tILIL IRQ PIN tILIH IRQ1 . . . tILIH IRQn IRQ (INTERNAL) Figure 8-4. External Interrupt Timing 8.5.1 5.0-Volt External Interrupt Timing Characteristics Characteristic(1) IRQ interrupt pulse width low (edge-triggered) IRQ interrupt pulse width (edge- and level-triggered) PA0-PA3 interrupt pulse width high (edge-triggered) PA0-PA3 interrupt pulse width high (edge- and level-triggered) Symbol tILIH tILIH tILIL tILIH Min 1.5 1.5 1.5 1.5 Max -- Note(3) -- Note(3) Unit tcyc(2) tcyc tcyc tcyc 1. V DD = 5.0 Vdc 10%, V SS = 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. tcyc = 1/fop; fop = fosc/2. 3. The minimum, tILIL, should not be less than the number of interrupt service routine cycles plus 19 tcyc. 8.5.2 3.3-Volt External Interrupt Timing Characteristics Characteristic(1) IRQ interrupt pulse width low (edge-triggered) IRQ interrupt pulse width (edge- and level-triggered) PA0-PA3 interrupt pulse width high (edge-triggered) PA0-PA3 interrupt pulse width high (edge- and level-triggered) Symbol tILIH tILIH tILIL tILIH Min 1.5 1.5 1.5 1.5 Max -- Note(3) -- Note(3) Unit tcyc(2) tcyc tcyc tcyc 1. V DD = 3.3 Vdc 10%, V SS = 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. tcyc = 1/fop; fop = fosc/2. 3. The minimum, tILIL, should not be less than the number of interrupt service routine cycles plus 19 tcyc. MC68HC705J1A -- Rev. 4.0 MOTOROLA External Interrupt Module (IRQ) Technical Data 107 External Interrupt Module (IRQ) Technical Data 108 External Interrupt Module (IRQ) MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 9. Multifunction Timer Module 9.1 Contents 9.2 9.3 9.4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 9.5 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 9.5.1 Timer Status and Control Register . . . . . . . . . . . . . . . . . . .112 9.5.2 Timer Counter Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 9.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 9.6.1 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115 9.6.2 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115 9.2 Introduction The multifunction timer provides a timing reference with programmable real-time interrupt (RTI) capability. Figure 9-1 shows the timer organization. Features include: * * * Timer overflow Four selectable interrupt rates Computer operating properly (COP) watchdog timer MC68HC705J1A -- Rev. 4.0 MOTOROLA Multifunction Timer Module Technical Data 109 Multifunction Timer Module RESET OVERFLOW TIMER COUNTER REGISTER BITS [0:7] OF 15-STAGE RIPPLE COUNTER RESET /4 INTERNAL CLOCK (XTAL / 2) INTERNAL DATA BUS INTERRUPT REQUEST TIMER STATUS/CONTROL REGISTER RT1 RT0 RTIFR TOFR TOIE RTIE RTIF TOF RTI RATE SELECT CLEAR COP TIMER RESET /2 /2 /2 /2 /2 /2 /2 BITS [8:14] OF 15-STAGE RIPPLE COUNTER /8 S Q COP RESET RESET R Figure 9-1. Multifunction Timer Block Diagram Technical Data 110 Multifunction Timer Module MC68HC705J1A -- Rev. 4.0 MOTOROLA Multifunction Timer Module Operation Addr. Register Name Read: Timer Status and Control Register (TSCR) Write: See page 112. Reset: Timer Counter Register Read: (TCR) Write: See page 114. Reset: Bit 7 TOF 6 RTIF 5 TOIE 4 RTIE 3 0 TOFR 2 0 1 RT1 Bit 0 RT0 1 TMR0 $0008 RTIFR 0 TMR2 1 TMR1 0 TMR7 0 TMR6 0 TMR5 0 TMR4 0 TMR3 $0009 0 0 0 0 0 0 0 0 = Unimplemented Figure 9-2. I/O Register Summary 9.3 Operation A 15-stage ripple counter, preceded by a prescaler that divides the internal clock signal by four, provides the timing reference for the timer functions. The value of the first eight timer stages can be read at any time by accessing the timer counter register at address $0009. A timer overflow function at the eighth stage allows a timer interrupt every 1024 internal clock cycles. The next four stages lead to the real-time interrupt (RTI) circuit. The RT1 and RT0 bits in the timer status and control register at address $0008 allow a timer interrupt every 16,384, 32,768, 65,536, or 131,072 clock cycles. The last four stages drive the selectable COP system. For information on the COP, refer to the Section 7. Computer Operating Properly (COP) Module. MC68HC705J1A -- Rev. 4.0 MOTOROLA Multifunction Timer Module Technical Data 111 Multifunction Timer Module 9.4 Interrupts These timer sources can generate interrupts: * Timer overflow flag (TOF) -- The TOF bit is set when the first eight stages of the counter roll over from $FF to $00. The timer overflow interrupt enable bit, TOIE, enables TOF interrupt requests. Real-time interrupt flag (RTIF) -- The RTIF bit is set when the selected RTI output becomes active. The real-time interrupt enable bit, RTIE, enables RTIF interrupt requests. * 9.5 I/O Registers These registers control and monitor the timer operation: * * Timer status and control register (TSCR) Timer counter register (TCR) 9.5.1 Timer Status and Control Register The read/write timer status and control register (TSCR) performs these functions: * * * * Address: Flags timer interrupts Enables timer interrupts Resets timer interrupt flags Selects real-time interrupt rates $0008 Bit 7 6 RTIF TOIE RTIE TOFR 0 0 0 0 0 RTIFR 0 1 1 5 4 3 0 2 0 RT1 RT0 1 Bit 0 Read: Write: Reset: TOF = Unimplemented Figure 9-3. Timer Status and Control Register (TSCR) Technical Data 112 Multifunction Timer Module MC68HC705J1A -- Rev. 4.0 MOTOROLA Multifunction Timer Module I/O Registers TOF -- Timer Overflow Flag This read-only flag becomes set when the first eight stages of the counter roll over from $FF to $00. TOF generates a timer overflow interrupt request if TOIE is also set. Clear TOF by writing a logic 1 to the TOFR bit. Writing to TOF has no effect. Reset clears TOF. RTIF -- Real-Time Interrupt Flag This read-only flag becomes set when the selected RTI output becomes active. RTIF generates a real-time interrupt request if RTIE is also set. Clear RTIF by writing a logic 1 to the RTIFR bit. Writing to RTIF has no effect. Reset clears RTIF. TOIE -- Timer Overflow Interrupt Enable Bit This read/write bit enables timer overflow interrupts. Reset clears TOIE. 1 = Timer overflow interrupts enabled 0 = Timer overflow interrupts disabled RTIE -- Real-Time Interrupt Enable Bit This read/write bit enables real-time interrupts. Reset clears RTIE. 1 = Real-time interrupts enabled 0 = Real-time interrupts disabled TOFR -- Timer Overflow Flag Reset Bit Writing a logic 1 to this write-only bit clears the TOF bit. TOFR always reads as logic 0. Reset clears TOFR. RTIFR -- Real-Time Interrupt Flag Reset Bit Writing a logic 1 to this write-only bit clears the RTIF bit. RTIFR always reads as logic 0. Reset clears RTIFR. RT1 and RT0 -- Real-Time Interrupt Select Bits These read/write bits select one of four real-time interrupt rates, as shown in Table 9-1. Because the selected RTI output drives the COP watchdog, changing the real-time interrupt rate also changes the counting rate of the COP watchdog. Reset sets RT1 and RT0. NOTE: Changing RT1 and RT0 when a COP timeout is imminent can cause a real-time interrupt request to be missed or an additional real-time Technical Data Multifunction Timer Module 113 MC68HC705J1A -- Rev. 4.0 MOTOROLA Multifunction Timer Module interrupt request to be generated. To prevent this occurrence, clear the COP timer before changing RT1 and RT0. Table 9-1. Real-Time Interrupt Rate Selection RT1:RT0 00 01 10 11 Number of Cycles to RTI 214 = 16,384 215 = 32,768 216 = 65,536 217 = 131,072 RTI Period(1) 8.2 ms 16.4 ms 32.8 ms 65.5 ms Number of Cycles to COP Reset 217 = 131,072 218 = 262,144 219 = 524,288 220 = 1,048,576 COP Timeout Period(1) 65.5 ms 131.1 ms 262.1 ms 524.3 ms 1. At 2-MHz bus, 4-MHz XTAL, 0.5 s per cycle 9.5.2 Timer Counter Register A 15-stage ripple counter is the core of the timer. The value of the first eight stages is readable at any time from the read-only timer counter register (TCR) shown in Figure 9-4. Address: $0009 Bit 7 Read: Write: Reset: 0 0 0 0 0 0 0 0 TMR7 6 TMR6 5 TMR5 4 TMR4 3 TMR3 2 TMR2 1 TMR1 Bit 0 TMR0 = Unimplemented Figure 9-4. Timer Counter Register (TCR) Power-on clears the entire counter chain and the internal clock begins clocking the counter. After 4064 cycles (or 16 cycles if the SOSCD bit in the mask option register is set), the power-on reset circuit is released, clearing the counter again and allowing the MCU to come out of reset. A timer overflow function at the eighth counter stage allows a timer interrupt every 1024 internal clock cycles. Technical Data 114 Multifunction Timer Module MC68HC705J1A -- Rev. 4.0 MOTOROLA Multifunction Timer Module Low-Power Modes 9.6 Low-Power Modes The STOP and WAIT instructions put the MCU in low power-consumption standby states. 9.6.1 Stop Mode The STOP instruction has these effects on the timer: * * Clears the timer counter Clears interrupt flags (TOF and RTIF) and interrupt enable bits (TOFE and RTIE) in TSCR, removing any pending timer interrupt requests and disabling further timer interrupts. 9.6.2 Wait Mode The timer remains active after a WAIT instruction. Any enabled timer interrupt request can bring the MCU out of wait mode. MC68HC705J1A -- Rev. 4.0 MOTOROLA Multifunction Timer Module Technical Data 115 Multifunction Timer Module Technical Data 116 Multifunction Timer Module MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 10. Electrical Specifications 10.1 Contents 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Operating Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . 119 Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 Power Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 5.0-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . .121 3.3-Volt DC Electrical Characteristics . . . . . . . . . . . . . . . . . . 122 Driver Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 10.10 Typical Supply Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 10.11 EPROM Programming Characteristics . . . . . . . . . . . . . . . . . . 126 10.12 5.0-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 10.13 3.3-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 10.2 Introduction This section contains electrical and timing specifications. MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Technical Data 117 Electrical Specifications 10.3 Maximum Ratings Maximum ratings are the extreme limits to which the MCU can be exposed without permanently damaging it. The MCU contains circuitry to protect the inputs against damage from high static voltages; however, do not apply voltages higher than those shown in the table here. Keep VIn and VOut within the range VSS (VIn or VOut) VDD. Connect unused inputs to the appropriate voltage level, either VSS or VDD. Rating(1) Supply voltage Current drain per pin (excluding VDD, VSS, and PA4-PA7) Input voltage IRQ/VPP pin Storage temperature range 1. Voltages are referenced to VSS. Symbol VDD I VIn VPP TSTG Value -0.3 to +7.0 25 VSS - 0.3 to VDD + 0.3 VSS - 0.3 to 2 x VDD + 0.3 -65 to +150 Unit V mA V V C NOTE: This device is not guaranteed to operate properly at the maximum ratings. Refer to 10.7 5.0-Volt DC Electrical Characteristics and 10.8 3.3-Volt DC Electrical Characteristics for guaranteed operating conditions. Technical Data 118 Electrical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Operating Temperature Range 10.4 Operating Temperature Range Package Type MC68HC705J1AP(1), DW(2), S(3) MC68HC705J1AC(4)P, CDW, CS MC68HC705J1AV(5)P, VDW, VS 1. P = plastic dual in-line package (PDIP) 2. DW = small outline integrated circuit (SOIC) 3. S = ceramic DIP (cerdip) 4. C = extended temperature range 5. V = automotive temperature range Symbol TA TA TA Value (TL to TH) 0 to 70 -40 to +85 -40 to +105 Unit C C C 10.5 Thermal Characteristics Characteristic Thermal resistance MC68HC705J1AP(1) MC68HC705J1ADW (2) MC68HC705J1AS(3) 1. P = plastic dual in-line package (PDIP) 2. DW = small outline integrated circuit (SOIC) 3. S = ceramic DIP (cerdip) Symbol Value Unit JA 60 C/W MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Technical Data 119 Electrical Specifications 10.6 Power Considerations The average chip junction temperature, TJ, in C can be obtained from: TJ = TA + (PD x JA) (1) Where: TA = ambient temperature in C JA = package thermal resistance, junction to ambient in C/W PD = PINT + PI/O PINT = ICC x VCC = chip internal power dissipation PI/O = power dissipation on input and output pins (user-determined) For most applications, PI/O < PINT and can be neglected. Ignoring PI/O, the relationship between PD and TJ is approximately: K PD = (2) TJ + 273C Solving equations (1) and (2) for K gives: = PD x (TA + 273C) + JA x (PD)2 (3) where K is a constant pertaining to the particular part. K can be determined from equation (3) by measuring PD (at equilibrium) for a known TA. Using this value of K, the values of PD and TJ can be obtained by solving equations (1) and (2) iteratively for any value of TA. Technical Data 120 Electrical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications 5.0-Volt DC Electrical Characteristics 10.7 5.0-Volt DC Electrical Characteristics Characteristic(1) Output voltage ILoad = 10.0 A ILoad = -10.0 A Output high voltage (ILoad = -0.8 mA) PA0-PA7, PB0-PB5 Output low voltage (ILoad = 1.6 mA) PA0-PA3, PB0-PB5 (ILoad = 10.0 mA) PA4-PA7 Input high voltage PA0-PA7, PB0-PB5, IRQ/VPP, RESET, OSC1 Input low voltage PA0-PA7, PB0-PB5, IRQ/VPP, RESET, OSC1 Supply current Run mode (3) Wait mode(4) Stop mode(5) 25C -40 to 105C I/O ports hi-z leakage current PA0-PA7, PB0-PB5 (without individual pulldown activated) Input pulldown current PA0-PA7, PB0-PB5 (with individual pulldown activated) Input pullup current RESET Input current(6) RESET, IRQ/VPP, OSC1 Capacitance Ports (as inputs or outputs) RESET, IRQ/VPP, OSC1, OSC2 Crystal/ceramic resonator oscillator mode internal resistor OSC1 to OSC2(7) Symbol VOL VOH VOH VOL VIH VIL Min -- VDD - 0.1 VDD - 0.8 Typ(2) -- -- -- Max 0.1 -- -- 0.4 0.4 VDD 0.2 x VDD Unit V V -- 0.7 x VDD VSS -- V -- -- V V IDD -- -- -- -- 3.5 0.45 0.2 2.0 0.2 80 -35 0.2 6.0 2.75 10 20 1 200 -85 1 mA mA A A A A A A IIL IIL IIL IIn COut CIn Rosc -- 35 -15 -- -- -- 1.0 -- -- 2.0 12 8 3.0 pF M 1. V DD = 5.0 Vdc 10%, V SS = 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. Typical values at midpoint of voltage range, 25C only 3. Run mode IDD is measured using external square wave clock source (fosc = 4.2 MHz); all inputs 0.2 V from rail; no dc loads; less than 50 pF on all outputs; CL = 20 pF on OSC2 4. Wait mode IDD: only timer system active. Wait mode is affected linearly by OSC2 capacitance. Wait mode is measured with all ports configured as inputs; VIL = 0.2 V; VIH = VDD - 0.2 V. Wait mode IDD is measured using external square wave clock source (fosc = 4.2 MHz); all inputs 0.2 V from rail; no dc loads; less than 50 pF on all outputs; CL = 20 pF on OSC2. 5. Stop mode IDD is measured with OSC1 = VSS. Stop mode IDD is measured with all ports configured as inputs; VIL = 0.2 V; VIH = V DD - 0.2 V 6. Only input high current rated to +1 A on RESET. 7. The Rosc value selected for RC oscillator versions of this device is unspecified. See Appendix C. MC68HSR705J1A for additional information. MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Technical Data 121 Electrical Specifications 10.8 3.3-Volt DC Electrical Characteristics Characteristic(1) Output voltage ILoad = 10.0 A ILoad = -10.0 A Output high voltage (ILoad = -0.2 mA) PA0-PA7, PB0-PB5 Output low voltage (ILoad = 0.4 mA) PA0-PA3, PB0-PB5 (ILoad = 5.0 mA) PA4-PA7 Input high voltage PA0-PA7, PB0-PB5, IRQ/VPP, RESET, OSC1 Input low voltage PA0-PA7, PB0-PB5, IRQ/VPP, RESET, OSC1 Supply current Run Mode (3) Wait Mode(4) Stop Mode(5) 25C -40 to 105C I/O ports hi-z leakage current PA0-PA7, PB0-PB5 (without individual pulldown activated) Input pulldown current PA0-PA7, PB0-PB5 (with individual pulldown activated) Input pullup current RESET Input current(6) RESET, IRQ/VPP, OSC1 Capacitance Ports (as inputs or outputs) RESET, IRQ/VPP, OSC1, OSC2 Crystal/ceramic resonator oscillator mode internal resistor OSC1 to OSC2(7) Symbol VOL VOH VOH VOL VIH VIL Min -- VDD- 0.1 VDD - 0.3 Typ(2) -- -- -- Max 0.1 -- -- 0.3 0.3 VDD 0.2 x VDD Unit V V -- 0.7 x VDD VSS -- V -- -- V V IDD -- -- -- -- 1.2 0.25 0.1 1.0 0.1 30 -25 0.1 4.0 1.5 5 10 1 100 -45 1 mA mA A A A A A A IIL IIL IIL IIn COut CIn Rosc -- 12 -10 -- -- -- 1.0 -- -- 2.0 12 8 3.0 pF M 1. V DD = 3.3 Vdc 10%, V SS = 0 Vdc, TA = -40C to +105C, unless otherwise noted 2. Typical values at midpoint of voltage range, 25C only 3. Run mode IDD is measured using external square wave clock source (fosc = 2.0 MHz); all inputs 0.2 V from rail; no dc loads; less than 50 pF on all outputs; CL = 20 pF on OSC2 4. Wait mode IDD: only timer system active. Wait mode is affected linearly by OSC2 capacitance. Wait mode is measured with all ports configured as inputs; VIL = 0.2 V; VIH = VDD - 0.2 V. Wait mode IDD is measured using external square wave clock source (fosc = 2.0 MHz); all inputs 0.2 V from rail; no dc loads; less than 50 pF on all outputs; CL = 20 pF on OSC2. 5. Stop mode IDD is measured with OSC1 = VSS. Stop mode IDD is measured with all ports configured as inputs; VIL = 0.2 V; VIH = V DD - 0.2 V 6. Only input high current rated to +1 A on RESET. 7. The R osc value selected for RC oscillator versions of this device is unspecified. See Appendix C. MC68HSR705J1A for additional information. Technical Data 122 Electrical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Driver Characteristics 10.9 Driver Characteristics 800 mV 700 mV 600 mV VDD - VOH OM INA 85 0 C LP C RO CE SS I NG SE EN 700 mV C 105 25 C C 600 mV VDD - VOH 500 mV 25 500 mV 400 mV 300 mV 400 mV 300 mV 200 mV 100 mV 0 0 -1.0 mA -2.0 mA -3.0 mA -4.0 mA -5.0 mA IOH 0 0 -1.0 mA -2.0 mA -3.0 mA -4.0 mA -5.0 mA IOH Notes: 1. At VDD = 5.0 V, devices are specified and tested for (VDD - VOH) 800 mV @ IOH = -0.8 mA. 2. At VDD = 3.3 V, devices are specified and tested for (VDD - VOH) 300 mV @ IOH = -0.2 mA. Figure 10-1. PA0-PA7, PB0-PB5 Typical High-Side Driver Characteristics SEE NOTE 2 25C NOMINAL PROCESSING 400 mV 350 mV 300 mV 250 mV VOL SE 100 mV EN VDD = 5.0 V OT E 200 mV 2 -40 C -4 CN NOM INA L PR 105 85 C OCE SSIN G OT E1 800 mV V DD = 3.3 V SEE NOTE 2 85 C C 25C NOMINAL PROCESSING 400 mV 85 C 105 C 300 mV 250 mV VOL 200 mV 150 mV 100 mV 50 mV 0 0 2.0 mA 4.0 mA IOL 6.0 mA 8.0 mA 10.0 mA VDD = 5.0 V -4 0 200 mV 150 mV 100 mV 50 mV 0 0 2.0 mA 4.0 mA IOL 6.0 mA 8.0 mA 10.0 mA VDD = 3.3 V Notes: 1. At V DD = 5.0 V, devices are specified and tested for VOL 400 mV @ IOL = 1.6 mA. 2. At V DD = 3.3 V, devices are specified and tested for VOL 300 mV @ IOL = 0.4 mA. Figure 10-2. PA0-PA3, PB0-PB5 Typical Low-Side Driver Characteristics MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications -40 C 350 mV 105 C Technical Data 123 Electrical Specifications 800 mV 700 mV 600 mV 1 NO C NA LP RO CE -4 SS 0 C IN G 800 mV C NO T E2 105 SEE 25 C 700 mV 600 mV 500 mV VOL NO MI VOL SEE 300 mV 200 mV 100 mV 0 0 10 mA 20 mA IOL 30 mA 40 mA 50 mA VDD = 5.0 V 25 400 mV C 400 mV 300 mV 200 mV NO M 500 mV 100 mV 0 0 10 mA 20 mA IOL 30 mA 40 mA 50 mA Notes: 1. At VDD = 5.0 V, devices are specified and tested for V OL 400 mV @ IOL = 10.0 mA. 2. At VDD = 3.3 V, devices are specified and tested for V OL 300 mV @ IOL = 5.0 mA. Figure 10-3. PA4-PA7 Typical Low-Side Driver Characteristics Technical Data 124 Electrical Specifications 85 C PR OC ES -40 SIN C G V DD = 3.3 V 105 C 85 INA L TE MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Typical Supply Currents 10.10 Typical Supply Currents 6.0 mA SEE NOTE 1 5.0 mA SUPPLY CURRENT (IDD) SEE NOTE 2 4.0 mA 5.5 V 3.0 mA 4.5 V 3.6 V 1.0 mA 3.0 V 2.0 mA 0 0 1.0 MHz 2.0 MHz INTERNAL OPERATING FREQUENCY (fOP) Notes: 1. At VDD = 5.0 V, devices are specified and tested for IDD 6.0 mA @ fOP = 2.1 MHz. 2. At VDD = 3.3 V, devices are specified and tested for IDD 4.0 mA @ fOP = 1.0 MHz. Figure 10-4. Typical Operating IDD (25C) SEE NOTE 2 700 A 600 A 5.5 V SUPPLY CURRENT (IDD) SEE NOTE 1 500 A 400 A 300 A 200 A 100 A 0 0 1.0 MHz 2.0 MHz INTERNAL OPERATING FREQUENCY (fOP) 4.5 V 3.6 V 3.0 V Notes: 1. At VDD = 5.0 V, devices are specified and tested for IDD 2.75 mA @ fOP = 2.1 MHz. 2. At VDD = 3.3 V, devices are specified and tested for IDD 1.5 mA @ fOP = 1.0 MHz. Figure 10-5. Typical Wait Mode IDD (25C) MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Technical Data 125 Electrical Specifications 10.11 EPROM Programming Characteristics Characteristic(1) Programming voltage IRQ/VPP Programming current IRQ/VPP Programming time Per array byte MOR Symbol VPP IPP Min 16.0 Typ 16.5 Max 17.0 Unit V -- 3.0 10.0 mA tEPGM tMPGM 4 4 -- -- -- -- ms 1. V DD = 5.0 Vdc 10%, V SS = 0 Vdc, T = -40C to +105C, unless otherwise noted A 10.12 5.0-Volt Control Timing Characteristic(1) Oscillator frequency Crystal oscillator option External clock source Internal operating frequency (fosc / 2) Crystal oscillator External clock Cycle time (1 / fOP) RESET pulse width low IRQ interrupt pulse width low (edge-triggered) IRQ interrupt pulse width low (edge- and level-triggered) PA0-PA3 interrupt pulse width high (edge-triggered) PA0-PA3 interrupt pulse width (edge- and level-triggered) OSC1 pulse width Symbol fosc Min Max Unit -- dc -- dc 476 1.5 1.5 1.5 1.5 1.5 200 4.2 4.2 2.1 2.1 -- -- -- Note(2) -- Note(2) -- MHz fop tcyc tRL tILIH tILIL tIHIL tIHIH tOH, tOL MHz ns tcyc tcyc tcyc tcyc tcyc ns 1. VDD = 5.0 Vdc 10%, V SS = 0 Vdc, T = -40C to +105C, unless otherwise noted A 2. The maximum width, tILIL or tILIH, should not be more than the number of cycles it takes to execute the interrupt service routine plus 19 tcyc or the interrupt service routine will be re-entered. Technical Data 126 Electrical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications 3.3-Volt Control Timing 10.13 3.3-Volt Control Timing Characteristic(1) Oscillator frequency Crystal oscillator option External clock source Internal operating frequency (fosc / 2) Crystal oscillator External clock Cycle time (1 / fOP) RESET pulse width low IRQ interrupt pulse width low (edge-triggered) IRQ interrupt pulse width low (edge- and level-triggered) PA0-PA3 interrupt pulse width high (edge-triggered) PA0-PA3 interrupt pulse width (edge- and level-triggered) OSC1 pulse width Symbol fosc Min -- dc -- dc 1000 1.5 1.5 1.5 1.5 1.5 400 Max 2.0 2.0 1.0 1.0 -- -- -- Note(2) -- Note(2) -- Unit MHz fop tcyc tRL tILIH tILIL tIHIL tIHIH tOH, tOL MHz ns tcyc tcyc tcyc tcyc tcyc ns 1. VDD = 3.3 Vdc 10%, V SS = 0 Vdc, T = -40C to +105C, unless otherwise noted A 2. The maximum width, tILIL or tILIH, should not be more than the number of cycles it takes to execute the interrupt service routine plus 19 tcyc or the interrupt service routine will be re-entered. MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Technical Data 127 Electrical Specifications tILIL IRQ PIN tILIH IRQ1 . . . tILIH IRQn IRQ (INTERNAL) Figure 10-6. External Interrupt Timing OSC (NOTE 1) tRL RESET tILIH IRQ (NOTE 2) 4064 tcyc IRQ (NOTE 3) INTERNAL CLOCK INTERNAL ADDRESS BUS 07FE (NOTE 4) 07FE 07FE 07FE 07FE 07FF Notes: 1. Internal clocking from OSC1 pin 2. Edge-triggered external interrupt mask option 3. Edge- and level-triggered external interrupt mask option 4. Reset vector shown as example RESET OR INTERRUPT VECTOR FETCH Figure 10-7. Stop Mode Recovery Timing Technical Data 128 Electrical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications 3.3-Volt Control Timing VDD (NOTE 1) 4064 tcyc OSC1 PIN INTERNAL CLOCK INTERNAL ADDRESS BUS 07FE 07FE 07FE 07FE 07FE 07FE 07FF INTERNAL DATA BUS NEW PCH NEW PCL Notes: 1. Power-on reset threshold is typically between 1 V and 2 V. 2. Internal clock, internal address bus, and internal data bus are not available externally. Figure 10-8. Power-On Reset Timing INTERNAL CLOCK INTERNAL ADDRESS BUS 07FE 07FE 07FE 07FE 07FF NEW PC NEW PC INTERNAL DATA BUS tRL NEW PCH NEW PCL DUMMY OP CODE Notes: 1. Internal clock, internal address bus, and internal data bus are not available externally. 2. The next rising edge of the internal clock after the rising edge of RESET initiates the reset sequence. Figure 10-9. External Reset Timing MC68HC705J1A -- Rev. 4.0 MOTOROLA Electrical Specifications Technical Data 129 Electrical Specifications Technical Data 130 Electrical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 11. Mechanical Specifications 11.1 Contents 11.2 11.3 11.4 11.5 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 Plastic Dual In-Line Package (Case 738) . . . . . . . . . . . . . . . . 132 Small Outline Integrated Circuit (Case 751) . . . . . . . . . . . . . .132 Ceramic Dual In-Line Package (Case 732) . . . . . . . . . . . . . . 133 11.2 Introduction The MC68HC705J1A, the resistor-capacitor (RC) oscillator, and high-speed option devices described in Appendix A. MC68HRC705J1A, Appendix B. MC68HSC705J1A, and Appendix C. MC68HSR705J1A are available in the following packages: * * * 738-03 -- plastic dual in-line package (PDIP) 751D-04 -- small outline integrated circuit (SOIC) 732-03 -- ceramic DIP (cerdip) (windowed) MC68HC705J1A -- Rev. 4.0 MOTOROLA Mechanical Specifications Technical Data 131 Mechanical Specifications 11.3 Plastic Dual In-Line Package (Case 738) -A20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. DIM A B C D E F G J K L M N INCHES MIN MAX 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 BSC 0.050 0.070 0.100 BSC 0.008 0.015 0.110 0.140 0.300 BSC 15 0 0.020 0.040 MILLIMETERS MIN MAX 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 BSC 1.27 1.77 2.54 BSC 0.21 0.38 2.80 3.55 7.62 BSC 0 15 0.51 1.01 B 1 10 C L -TSEATING PLANE K M E G F D 20 PL 0.25 (0.010) M N J 20 PL 0.25 (0.010) TA M M TB M 11.4 Small Outline Integrated Circuit (Case 751) -A20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.150 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0 7 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0 7 0.395 0.415 0.010 0.029 -B- P 10 PL 0.010 (0.25) M B M 1 10 D 20 PL 0.010 (0.25) M TA S B S J F R X 45 C -TG 18 PL SEATING PLANE K M Technical Data 132 Mechanical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Mechanical Specifications Ceramic Dual In-Line Package (Case 732) 11.5 Ceramic Dual In-Line Package (Case 732) 20 1 11 10 NOTES: 1. LEADS WITHIN 0.010 DIAMETER, TRUE POSITION AT SEATING PLANE, AT MAXIMUM MATERIAL CONDITION. 2. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 3. DIMENSIONS A AND B INCLUDE MENISCUS. B A F C L DIM A B C D F G H J K L M N N H D SEATING PLANE G K J M INCHES MIN MAX 0.940 0.990 0.260 0.295 0.150 0.200 0.015 0.022 0.055 0.065 0.100 BSC 0.020 0.050 0.008 0.012 0.125 0.160 0.300 BSC 0_ 15_ 0.010 0.040 MC68HC705J1A -- Rev. 4.0 MOTOROLA Mechanical Specifications Technical Data 133 Mechanical Specifications Technical Data 134 Mechanical Specifications MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Section 11. Section 12. Ordering Information 12.1 Contents 12.2 12.3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 MCU Order Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 12.2 Introduction This section contains ordering information for the available package types. 12.3 MCU Order Numbers Table 12-1 lists the MC order numbers. Table 12-1. Order Numbers Package Type Case Outline Pin Count Operating Temperature 0 to 70C -40 to +85C -40 to +105C 0 to 70C -40 to +85C -40 to +105C 0 to 70C -40 to +85C -40 to +105C Order Number(1) MC68HC705J1AP(2) MC68HC705J1AC (3)P MC68HC705J1AV(4)P MC68HC705J1ADW (5) MC68HC705J1ACDW MC68HC705J1AVDW MC68HC705J1AS(6) MC68HC705J1ACS MC68HC705J1AVS PDIP 738-03 20 SOIC 751D-04 20 Cerdip 732-03 20 1. Refer to Appendix A. MC68HRC705J1A, Appendix B. MC68HSC705J1A, and Appendix C. MC68HSR705J1A for ordering information on optional high-speed and resistor-capacitor oscillator devices. 2. P = Plastic dual in-line package (PDIP) 3. C = Extended temperature range 4. V = Automotive temperature range 5. DW = Small outline integrated circuit (SOIC) 6. S = Ceramic dual in-line package (cerdip) MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data 135 Ordering Information Technical Data 136 Ordering Information MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Appendix A. MC68HRC705J1A A.1 Contents A.2 A.3 A.4 A.5 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 RC Oscillator Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 Typical Internal Operating Frequency for RC Oscillator Option. . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Package Types and Order Numbers . . . . . . . . . . . . . . . . . . . 140 A.2 Introduction This appendix introduces the MC68HRC705J1A, a resistor-capacitor (RC) oscillator mask option version of the MC68HC705J1A. All of the information in this document applies to the MC68HRC705J1A with the exceptions given in this appendix. MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HRC705J1A Technical Data 137 MC68HRC705J1A A.3 RC Oscillator Connections For greater cost reduction, the RC oscillator mask option allows the configuration shown in Figure A-1 to drive the on-chip oscillator. Mount the RC components as close as possible to the pins for startup stabilization and to minimize output distortion. OSC1 R OSC2 MCU OSC1 OSC2 R VDD C2 C1 VSS Figure A-1. RC Oscillator Connections NOTE: The optional internal resistor is not recommended for configurations that use the RC oscillator connections as shown in Figure A-1. For such configurations, the oscillator internal resistor (OSCRES) bit of the mask option register should be programmed to a logic 0. Technical Data 138 MC68HRC705J1A MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HRC705J1A Typical Internal Operating Frequency for RC Oscillator Option A.4 Typical Internal Operating Frequency for RC Oscillator Option Figure A-2 shows typical internal operating frequencies at 25C for the RC oscillator option. NOTE: Tolerance for resistance is 50%. When selecting resistor size, consider the tolerance to ensure that the resulting oscillator frequency does not exceed the maximum operating frequency. 10 1 FREQUENCY (MHz) 3.0 V 3.6 V 4.5 V 5.0 V 5.5 V 0.1 0.01 1 10 100 1000 10000 RESISTANCE (k) Figure A-2. Typical Internal Operating Frequency for Various VDD at 25C -- RC Oscillator Option Only MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HRC705J1A Technical Data 139 MC68HRC705J1A A.5 Package Types and Order Numbers Table A-1. MC68HRC705J1A (RC Oscillator Option) Order Numbers Package Type Case Outline Pin Count Operating Temperature 0 to 70C -40 to +85C -40 to +105C 0 to 70C -40 to +85C -40 to +105C 0 to 70C -40 to +85C -40 to +105C Order Number(1) MC68HRC705J1AP(2) MC68HRC705J1AC (3)P MC68HRC705J1AV(4)P MC68HRC705J1ADW (5) MC68HRC705J1ACDW MC68HRC705J1AVDW MC68HRC705J1AS(6) MC68HRC705J1ACS MC68HRC705J1AVS PDIP 738-03 20 SOIC 751D-04 20 Cerdip 732-03 20 1. Refer to Section 12. Ordering Information for standard part ordering information. 2. P = plastic dual in-line package (PDIP) 3. C = extended temperature range 4. V = automotive temperature range 5. DW = small outline integrated circuit (SOIC) 6. S = ceramic dual in-line package (cerdip) Technical Data 140 MC68HRC705J1A MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Appendix B. MC68HSC705J1A B.1 Contents B.2 B.3 B.4 B.5 B.6 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 5.0-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . .142 3.3-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . .142 Typical Supply Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Package Types and Order Numbers . . . . . . . . . . . . . . . . . . . 144 B.2 Introduction This appendix introduces the MC68HSC705J1A, a high-speed version of the MC68HC705J1A. All of the information in this document applies to the MC68HSC705J1A with the exceptions given in this appendix. MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSC705J1A Technical Data 141 MC68HSC705J1A B.3 5.0-Volt DC Electrical Characteristics Characteristic Supply current (fOP = 4.0 MHz) Run Wait Symbol IDD Min -- Typ 4.25 0.57 Max 7.0 3.25 Unit mA B.4 3.3-Volt DC Electrical Characteristics Characteristic Supply current (fOP = 2.1 MHz) Run Wait Symbol IDD Min -- Typ 1.4 0.28 Max 4.25 1.75 Unit mA B.5 Typical Supply Currents 7.0 mA SEE NOTE 1 6.0 mA 5.5 V 5.0 mA SUPPLY CURRENT (IDD) 4.0 mA 3.0 mA SEE NOTE 2 4.5 V 2.0 mA 3.6 V 1.0 mA 3.0 V 0 0 1.0 MHz 2.0 MHz 3.0 MHz 4.0 MHz INTERNAL OPERATING FREQUENCY (fOP) Notes: 1. At V DD = 5.0 V, high-speed devices are specified and tested for IDD 7.0 mA @ fOP = 4.0 MHz. 2. At V DD = 3.3 V, high-speed devices are specified and tested for IDD 4.25 mA @ fOP = 2.1 MHz. Figure B-1. Typical High-Speed Operating IDD (25C) Technical Data 142 MC68HSC705J1A MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSC705J1A Typical Supply Currents SEE NOTE 1 700 A 600 A SUPPLY CURRENT (IDD) SEE NOTE 2 5.5 V 500 A 400 A 300 A 200 A 100 A 0 0 1.0 MHz 2.0 MHz 3.0 MHz 3.6 V 3.0 V 4.5 V 4.0 MHz INTERNAL OPERATING FREQUENCY (fOP) Notes: 1. At VDD = 5.0 V, high-speed devices are specified and tested for IDD 3.25 mA @ fOP = 4.0 MHz. 2. At VDD = 3.3 V, high-speed devices are specified and tested for IDD 1.75 mA @ fOP = 2.1 MHz. Figure B-2. Typical High-Speed Wait Mode IDD (25C) MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSC705J1A Technical Data 143 MC68HSC705J1A B.6 Package Types and Order Numbers Table B-1. MC68HSC705J1A (High Speed) Order Numbers Package Type PDIP Case Outline 738-03 Pin Count 20 Operating Temperature 0 to 70C -40 to +85C 0 to 70C -40 to +85C 0 to 70C -40 to +85C Order Number(1) MC68HSC705J1AP(2) MC68HSC705J1AC(3)P MC68HSC705J1ADW (4) MC68HSC705J1ACDW MC68HSC705J1AS(5) MC68HSC705J1ACS SOIC 751D-04 20 Cerdip 732-03 20 1. Refer to Section 12. Ordering Information for standard part ordering information. 2. P = plastic dual in-line package (PDIP) 3. C = extended temperature range 4. DW = small outline integrated circuit (SOIC) 5. S = ceramic dual in-line package (cerdip) Technical Data 144 MC68HSC705J1A MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Appendix C. MC68HSR705J1A C.1 Contents C.2 C.3 C.4 C.5 C.6 C.7 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 RC Oscillator Connections (External Resistor). . . . . . . . . . . . 145 Typical Internal Operating Frequency at 25C for High-Speed RC Oscillator Option. . . . . . . . . . . . . . . . . 146 RC Oscillator Connections (No External Resistor) . . . . . . . . .147 Typical Internal Operating Frequency versus Temperature (No External Resistor) . . . . . . . . . . . . . . . . . . . . . . . . . . . .148 Package Types and Order Numbers . . . . . . . . . . . . . . . . . . . 149 C.2 Introduction This appendix introduces the MC68HSR705J1A, a high-speed version of the MC68HRC705J1A. All of the information in this document applies to the MC68HSR705J1A with the exceptions given in this appendix. C.3 RC Oscillator Connections (External Resistor) Refer to Appendix A. MC68HRC705J1A for a description of the resistor-capacitor (RC) oscillator connections with external resistor. MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSR705J1A Technical Data 145 MC68HSR705J1A C.4 Typical Internal Operating Frequency at 25C for High-Speed RC Oscillator Option 10 3.0 V 3.6 V 4.5 V 5.0 V 5.5 V FREQUENCY (MHz) 1 1 10 100 RESISTANCE (k) Figure C-1. Typical Internal Operating Frequency at 25C for High-Speed RC Oscillator Option For lower frequency operation characteristics, refer to Appendix A. MC68HRC705J1A. NOTE: Tolerance for resistance is 50 percent. When selecting resistor size, consider the tolerance to ensure that resulting oscillator frequency does not exceed the maximum operating frequency. Technical Data 146 MC68HSR705J1A MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSR705J1A RC Oscillator Connections (No External Resistor) C.5 RC Oscillator Connections (No External Resistor) For maximum cost reduction, the RC oscillator mask connections shown in Figure C-2 allow the on-chip oscillator to be driven with no external components. This can be accomplished by programming the oscillator internal resistor (OSCRES) bit in the mask option register to a logic 1. When programming the OSCRES bit for the MC68HSR705J1A, an internal resistor is selected which yields typical internal oscillator frequencies as shown in Figure C-3. The internal resistance for this device is different than the resistance of the selectable internal resistor on the MC68HC705J1A and the MC68HSC705J1A devices. NOTE: This option is not available on the ROM version of this device (MC68HC05J1A). OSC1 R OSC2 MCU OSC1 OSC2 VDD C2 EXTERNAL CONNECTIONS LEFT OPEN C1 VSS Figure C-2. RC Oscillator Connections (No External Resistor) MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSR705J1A Technical Data 147 MC68HSR705J1A C.6 Typical Internal Operating Frequency versus Temperature (No External Resistor) 3.00 2.50 FREQUENCY (MHz) 2.00 3.0 V 3.6 V 1.50 4.5 V 5.0 V 5.5 V 1.00 0.50 0.00 -50 0 50 100 150 TEMPERATURE (C) Figure C-3. Typical Internal Operating Frequency versus Temperature (OSCRES Bit = 1) NOTE: Due to process variations, operating voltages, and temperature requirements, the internal resistance and tolerance are unspecified. Typically for a given voltage and temperature, the frequency should not vary more than 500 kHz. However, this data is not guaranteed. It is the user's responsibility to ensure that the resulting internal operating frequency meets the user's requirements. Technical Data 148 MC68HSR705J1A MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSR705J1A Package Types and Order Numbers C.7 Package Types and Order Numbers Table C-1. MC68HSR705J1A (High-Speed RC Oscillator Option) Order Numbers(1) Package Type PDIP Case Outline 738-03 Pin Count 20 Operating Temperature 0 to 70C -40 to +85C 0 to 70C -40 to +85C 0 to 70C -40 to +85C Order Number MC68HSR705J1AP(2) MC68HSR705J1AC(3)P MC68HSR705J1ADW (4) MC68HSR705J1ACDW MC68HSR705J1AS(5) MC68HSR705J1ACS SOIC 751D-04 20 Cerdip 732-03 20 1. Refer to Section 12. Ordering Information for standard part ordering information. 2. P = plastic dual in-line package (PDIP) 3. C = extended temperature range 4. DW = small outline integrated circuit (SOIC) 5. S = ceramic dual in-line package (cerdip) MC68HC705J1A -- Rev. 4.0 MOTOROLA MC68HSR705J1A Technical Data 149 MC68HSR705J1A Technical Data 150 MC68HSR705J1A MC68HC705J1A -- Rev. 4.0 MOTOROLA Technical Data -- MC68HC705J1A Index A accumulator register (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 addressing modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 B block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 brownout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 C C bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 central processor unit (CPU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 computer operating properly (COP) module . . . . . . . . . . . . . . . . . . . 97 condition code register (CCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 COP watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 COP in stop mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 COP in wait mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 COP register (COPR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 COP reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 programmable option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 COPEN bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 instruction set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 instruction set summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 instruction types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 opcode map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 programming model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 MC68HC705J1A -- Rev. 4.0 MOTOROLA Index Technical Data 151 Index CPU registers accumulator register (A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . index register (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . program counter register (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . stack pointer register (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D data direction registers data direction register A (DDRA) . . . . . . . . . . . . . . . . . . . . . . . . . 90 data direction register B (DDRB) . . . . . . . . . . . . . . . . . . . . . . . . . 93 data-retention mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 E ELAT bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 control timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126, 127 DC electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . 121, 122 driver characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 MC68HSC705J1A (high-speed option) . . . . . . . . . . . . . . . . . . . 142 MC68HSR705J1A (high-speed RC oscillator option) . . . . . . . . 145 operating temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 power considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 typical supply currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 electrostatic damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 EPGM bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 EPMSEC bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 EPROM EPROM security programmable option . . . . . . . . . . . . . . . . . . . . 25 EPROM/OTPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 erasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38, 40 programming characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 programming register (EPROG). . . . . . . . . . . . . . . . . . . . . . . . . . 39 48 48 50 49 Technical Data 152 Index MC68HC705J1A -- Rev. 4.0 MOTOROLA Index external interrupt module (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 external interrupt pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 external reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 G general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 H H bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 I I bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 index register (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 instruction set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 addressing modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 instruction set summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 instruction types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 opcode map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 instruction types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 interrupts external interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73, 74 external interrupt logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 external interrupt module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 external interrupt timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75, 107 external interrupt vector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 interrupt flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78, 103 interrupt processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 interrupt sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 interrupt stacking order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 IRQ module block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 IRQ status and control register (ISCR) . . . . . . . . . . . . . . . . . . . 106 IRQ/VPP pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101, 104 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 optional external interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 pin sensitivity selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 pin triggering option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 port A external interrupts programmable option. . . . . . . . . . . . . . 25 MC68HC705J1A -- Rev. 4.0 MOTOROLA Index Technical Data 153 Index real-time interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 reset/interrupt vector addresses. . . . . . . . . . . . . . . . . . . . . . . . . . 77 software interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 software interrupt vector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 timer interrupt vector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 timer interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76, 112 timer overflow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 IRQ latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 IRQ/VPP pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31, 98, 104 IRQE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 IRQF bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 IRQR bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 J junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 L LEVEL bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 COP timeout period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 data-retention mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80, 84 effects on clock generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 effects on COP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 effects on CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 effects on EPROM/OTPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 effects on timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 exiting stop mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 exiting wait mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 flowchart (STOP/HALT/WAIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 STOP instruction flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 stop mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79, 82 stop recovery timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 timing of stop mode recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 wait mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Technical Data 154 Index MC68HC705J1A -- Rev. 4.0 MOTOROLA Index M mask option register (MOR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 MC68HC705J1A features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 MC68HRC705J1A (RC oscillator option) . . . . . . . . . . . . . . . . . . . . 137 operating frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 order numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 package types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 RC oscillator connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 MC68HSC705J1A (high-speed option) . . . . . . . . . . . . . . . . . . . . . . 141 DC electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 order numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 package types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 typical operating current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 typical wait mode current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 MC68HSR705J1A (high-speed RC oscillator option) . . . . . . . . . . . 145 operating frequencies (with OSCRES bit set) . . . . . . . . . . . . . . 148 operating frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 order numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 package types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 RC oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 RC oscillator connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 EPROM/OTPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 EPROM/OTPROM programming . . . . . . . . . . . . . . . . . . . . . . . . . 38 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 I/O register summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 mask option register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 MPGM bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 multifunction timer module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 N N bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 MC68HC705J1A -- Rev. 4.0 MOTOROLA Index Technical Data 155 Index O opcode map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 options (mask) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 options (programmable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ordering information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 MC68HRC705J1A (RC oscillator option) . . . . . . . . . . . . . . . . . . 140 MC68HSC705J1A (high-speed option) . . . . . . . . . . . . . . . . . . . 144 MC68HSR705J1A (high-speed RC oscillator option) . . . . . . . . 149 order numbers . . . . . . . . . . . . . . . . . . . . . . . . . . 135, 140, 144, 149 OSC1 pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 OSC2 pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 oscillator crystal oscillator internal resistor option . . . . . . . . . . . . . . . . . . . . 25 delay counter programmable option. . . . . . . . . . . . . . . . . . . . . . . 25 on-chip oscillator stabilization delay. . . . . . . . . . . . . . . . . . . . . . . 71 pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 OSCRES bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 P PA0-PA3 pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 package types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 parallel input/output (I/O) ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 pin assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 PIRQ bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . port A data direction register (DDRA) . . . . . . . . . . . . . . . . . . . . . . . . . . . data register (PORTA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I/O circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I/O pin interrupts (PA0-PA3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . LED drive capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pin operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pulldown register (PDRA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . port B data direction register (DDRB) . . . . . . . . . . . . . . . . . . . . . . . . . . . electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Data 156 Index 42 90 89 95 90 92 92 91 31 91 93 95 MC68HC705J1A -- Rev. 4.0 MOTOROLA Index I/O circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 pin operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 port B data register (PORTB). . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 pulldown register (PDRB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 power dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 power-on reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 program counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 programmable options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 programming model (CPU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 pulldown register A (PDRA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 pulldown register B (PDRB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 pulldown resistors programmable option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 R RAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 stack RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 registers CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 I/O register summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 parallel I/O port register summary . . . . . . . . . . . . . . . . . . . . . . . . 88 RESET pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30, 72 resets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 COP register (COPR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 COP watchdog reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 external reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 external reset timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 illegal address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 power-on reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 power-on reset timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 reset sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 reset/interrupt vector addresses. . . . . . . . . . . . . . . . . . . . . . . . . . 77 resistors (pulldown) programmable option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 RT1, RT0 bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 MC68HC705J1A -- Rev. 4.0 MOTOROLA Index Technical Data 157 Index RTIE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 RTIF bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 RTIFR bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 S Schmitt trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31, 104, 105 SOSCD bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 stack pointer register (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 STOP instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81, 100, 106 stop mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82, 100 effect on COP watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 effects on timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 STOP instruction flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 stop recovery timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 stop/halt mode programmable option . . . . . . . . . . . . . . . . . . . . . . . . 25 SWAIT bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 SWPDI bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 T thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 timer block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 I/O registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76, 112 low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 timer counter register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 timer interrupt vector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 timer status and control register (TSCR) . . . . . . . . . . . . . . . . . . 112 TOF bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 TOFR bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 TOIE bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 Technical Data 158 Index MC68HC705J1A -- Rev. 4.0 MOTOROLA Index V VDD pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 VSS pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 W WAIT instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81, 100, 106 wait mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 effects on timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 Z Z bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 MC68HC705J1A -- Rev. 4.0 MOTOROLA Index Technical Data 159 Index Technical Data 160 Index MC68HC705J1A -- Rev. 4.0 MOTOROLA HOW TO REACH US: USA/EUROPE/LOCATIONS NOT LISTED: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217 1-303-675-2140 or 1-800-441-2447 JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3-20-1, Minami-Azabu Minato-ku, Tokyo 106-8573 Japan 81-3-3440-3569 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong 852-26668334 TECHNICAL INFORMATION CENTER: 1-800-521-6274 HOME PAGE: http://www.motorola.com/semiconductors Information in this document is provided solely to enable system and software implementers to use Motorola products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits or integrated circuits based on the information in this document. Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and the Stylized M Logo are registered in the U.S. Patent and Trademark Office. digital dna is a trademark of Motorola, Inc. All other product or service names are the property of their respective owners. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. (c) Motorola, Inc. 2002 MC68HC705J1A/D |
Price & Availability of MC68HC705J
 |
|
|
|
|
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] |