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MC68HC05P4A
Technical Data
M68HC05
Microcontrollers
MC68HC05P4A/D Rev. 7, 5/2002
WWW.MOTOROLA.COM/SEMICONDUCTORS
MC68HC05P4A
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
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data 3
Revision History
Revision History
Date May, 2002 Revision Level 7.0 Description Corrected World Wide Web address and qualification status Page Number(s) N/A
Technical Data 4
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
List of Sections
Section 1. General Description . . . . . . . . . . . . . . . . . . . . 17 Section 2. Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Section 3. Central Processor Unit (CPU) . . . . . . . . . . . . 33 Section 4. Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Section 5. Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Section 6. Low-Power Modes. . . . . . . . . . . . . . . . . . . . . . 47 Section 7. Simple Serial Input/Output Port (SIOP) . . . . . 51 Section 8. Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Section 9. Computer Operating Properly (COP) . . . . . . 65 Section 10. Self-Check Mode . . . . . . . . . . . . . . . . . . . . . . 67 Section 11. Instruction Set . . . . . . . . . . . . . . . . . . . . . . . . 69 Section 12. Electrical Specifications. . . . . . . . . . . . . . . . 85 Section 13. Mechanical Specifications . . . . . . . . . . . . . . 95 Section 14. Ordering Information . . . . . . . . . . . . . . . . . . 97
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List of Sections
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Table of Contents
Section 1. General Description
1.1 1.2 1.3 1.4 1.5 1.6 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Mask Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 MCU Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1.7 Signal Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1.7.1 VDD and VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 1.7.2 IRQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 1.7.3 OSC1 and OSC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.4 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.5 TCMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.6 PA0-PA7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.7 SDO/PB5, SDI/PB6, and SCK/PB7 . . . . . . . . . . . . . . . . . . . 23 1.7.8 PC0-PC7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 1.7.9 PD5 and TCAP/PD7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1.8 Input/Output Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Section 2. Memory Map
2.1 2.2 2.3 2.4 2.5
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Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ROM Security Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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Table of Contents Section 3. Central Processor Unit (CPU)
3.1 3.2 3.3 3.4 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Index Register (X). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.5 Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.1 H -- Half Carry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.2 I -- Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 3.5.3 N -- Negative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.4 Z -- Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.5.5 C -- Carry/Borrow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.6 3.7 Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Section 4. Interrupts
4.1 4.2 4.3 4.4 4.5 4.6 4.7 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Hardware Controlled Interrupt Sequence . . . . . . . . . . . . . . . . . 38 Timer Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 External Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Optional External Interrupts (PA0-PA7) . . . . . . . . . . . . . . . . . . 42 Software Interrupt (SWI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Section 5. Resets
5.1 5.2 5.3 5.4 5.5 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 RESET Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Computer Operating Properly (COP) Reset . . . . . . . . . . . . . . . 46
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Section 6. Low-Power Modes
6.1 6.2 6.3 6.4 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 WAIT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Section 7. Simple Serial Input/Output Port (SIOP)
7.1 7.2 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3 Signal Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 7.3.1 Serial Clock (SCK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 7.3.2 Serial Data Out (SDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 7.3.3 Serial Data In (SDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 7.4 SIOP Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 7.4.1 SIOP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 7.4.2 SIOP Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 7.4.3 SIOP Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Section 8. Timer
8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Output Compare Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Input Capture Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Timer Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Timer Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Timer During Wait or Halt Mode . . . . . . . . . . . . . . . . . . . . . . . . 64 Timer During Stop Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
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Table of Contents Section 9. Computer Operating Properly (COP)
9.1 9.2 9.3 9.4 9.5 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Resetting the COP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 COP During Wait or Halt Mode. . . . . . . . . . . . . . . . . . . . . . . . . 66 COP During Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Section 10. Self-Check Mode
10.1 10.2 10.3 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Section 11. Instruction Set
11.1 11.2 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11.3 Addressing Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 11.3.1 Inherent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 11.3.2 Immediate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 11.3.3 Direct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.4 Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.5 Indexed, No Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.6 Indexed, 8-Bit Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.7 Indexed, 16-Bit Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72 11.3.8 Relative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 11.4 Instruction Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 11.4.1 Register/Memory Instructions. . . . . . . . . . . . . . . . . . . . . . . . 73 11.4.2 Read-Modify-Write Instructions . . . . . . . . . . . . . . . . . . . . . . 74 11.4.3 Jump/Branch Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . 74 11.4.4 Bit Manipulation Instructions . . . . . . . . . . . . . . . . . . . . . . . . 76 11.4.5 Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 11.5 11.6 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
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Section 12. Electrical Specifications
12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 5.0-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . . . 88 3.3-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . . . 89 5.0-Volt SIOP Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 3.3-Volt SIOP Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
12.10 5.0-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 12.11 3.3-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Section 13. Mechanical Specifications
13.1 13.2 13.3 13.4 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 28-Pin Plastic Dual In-Line Package (Case 710-02) . . . . . . . . 95 28-Pin Small Outline Integrated Circuit Package (Case 751F-04). . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Section 14. Ordering Information
14.1 14.2 14.3 14.4 14.5 14.6 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 MCU Ordering Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Application Program Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 ROM Program Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 ROM Verification Units (RVUs). . . . . . . . . . . . . . . . . . . . . . . . 100
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List of Figures
Figure 1-1 1-2 1-3 1-4 2-1 2-2 4-1 4-2 5-1 6-1 7-1 7-2 7-3 7-4 7-5 8-1 8-2 8-3 10-1 12-1 12-2
Title
Page
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Port A Pullup Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 I/O Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 I/O Registers for the MC68HC05P4A . . . . . . . . . . . . . . . . . . . . 29 Hardware Interrupt Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . 39 IRQ Function Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Power-On Reset and RESET . . . . . . . . . . . . . . . . . . . . . . . . . . 46 STOP/WAIT Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 SIOP Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Serial I/O Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 SIOP Control Register (SCR) . . . . . . . . . . . . . . . . . . . . . . . . . . 54 SIOP Status Register (SSR). . . . . . . . . . . . . . . . . . . . . . . . . . . 55 SIOP Data Register (SDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Timer Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Timer Control Register (TCR). . . . . . . . . . . . . . . . . . . . . . . . . . 62 Timer Status Register (TSR) . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Self-Check Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 SIOP Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 STOP Recovery Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
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List of Figures
Figure 12-3 12-4 12-5 Title Page
External Interrupt Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Power-On Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94 External Reset Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
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List of Tables
Table 1-1 4-1 10-1 11-1 11-2 11-3 11-4 11-5 11-6 11-7
Title
Page
I/O Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Vector Address for Interrupts and Reset . . . . . . . . . . . . . . . . . 38 Self-Check Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Register/Memory Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Read-Modify-Write Instructions . . . . . . . . . . . . . . . . . . . . . . . . 74 Jump and Branch Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 75 Bit Manipulation Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Control Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
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Section 1. General Description
1.1 Contents
1.2 1.3 1.4 1.5 1.6 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Mask Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 MCU Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
1.7 Signal Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1.7.1 VDD and VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 1.7.2 IRQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 1.7.3 OSC1 and OSC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.4 RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.5 TCMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.6 PA0-PA7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.7.7 SDO/PB5, SDI/PB6, and SCK/PB7 . . . . . . . . . . . . . . . . . . . 23 1.7.8 PC0-PC7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 1.7.9 PD5 and TCAP/PD7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1.8 Input/Output Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
1.2 Introduction
The MC68HC05P4A is a 28-pin MCU (microcontroller unit) based on the MC68HC05P4. The memory map includes 4160 bytes of user ROM and 176 bytes of RAM. The MCU has two 8-bit input/output (I/O) ports, A and C. Port B has three I/O pins and port D has two pins, one that is I/O and the other input only. The MC68HC05P4A includes a simple serial I/O peripheral (SIOP) and an on-chip mask programmable computer operating properly (COP) watchdog circuit.
MC68HC05P4A -- Rev. 7.0 MOTOROLA General Description Technical Data 17
General Description 1.3 Features
Features of the MC68HC05P4A include: * * * * * * * * * * * * * * * * * Low cost HC05 core 28-pin package On-chip oscillator with RC (resistor capacitor) or crystal/ceramic resonator mask options 4160 bytes of user read-only memory (ROM), including 16 user vector locations ROM security feature(1) 176 bytes of on-chip random-access memory (RAM) 16-bit timer 20 bidirectional input/output (I/O) lines, one input-only line Mask programmable keyscan (pullups and interrupt) on eight port pins (PA0-PA7) Two port pins with high current drive capability User mode Self-check mode Power-saving stop and wait modes Edge-sensitive or edge- and level-sensitive interrupt trigger mask option Simple serial I/O port Mask option selectable computer operating properly (COP) watchdog timer
1. No security feature is absolutely secure. However, Motorola's strategy is to make reading or copying the ROM difficult for unauthorized users.
Technical Data 18 General Description
MC68HC05P4A -- Rev. 7.0 MOTOROLA
General Description Mask Options
1.4 Mask Options
The MC68HC05P4A has 13 mask options: * * * * * * CLOCK, RC or crystal IRQ, edge-sensitive only or edge- and level-sensitive SIOP, most significant bit (MSB) or least significant bit (LSB) first COP watchdog timer, enable/disable Keyscan pullups and interrupts on port A, enable/disable by pin STOP instruction
All mask options and the user ROM are programmed on the 01 layer in fabrication.
NOTE:
Negative true signals like RESET and IRQ will be denoted with an overline.
1.5 MCU Structure
Figure 1-1 shows the structure of the MC68HC05P4A.
MC68HC05P4A -- Rev. 7.0 MOTOROLA General Description
Technical Data 19
General Description
OSC1 OSC2 TCMP INTERNAL PROCESSOR CLOCK OSCILLATOR AND DIVIDE BY 2
TIMER SYSTEM
COP SYSTEM RESET
TCAP/PD7 PORT D PD5 I/O LINES PA0 PA1 PA2 PORT A I/O LINES PA3 PA4 PA5 PA6 PA7
IRQ PORT DATA D REG DIR REG PC0 PC1 ACCUMULATOR CPU CONTROL DATA PORT DIR REG C REG PC2 PC3 PC4 PC5 CPU PC6 PC7 PORT C I/O LINES
PORT DATA A REG DIR REG
INDEX REGISTER CONDITION CODE REGISTER STACK POINTER PROGRAM COUNTER HIGH PROGRAM COUNTER LOW ALU
SDO/PB5 PORT B I/O LINES SDI/PB6 SCK/PB7 PORT B DATA REG DIR REG
4160 X 8 USER ROM 240 X 8 SELF-CHECK ROM
176 X 8 RAM
Figure 1-1. Block Diagram
Technical Data 20 General Description
MC68HC05P4A -- Rev. 7.0 MOTOROLA
General Description Pin Assignments
1.6 Pin Assignments
The MC68HC05P4A pin assignments are shown in Figure 1-2.
RESET IRQ PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 SDO/PB5 SDI/PB6 SCK/PB7 VSS
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
VDD OSC1 OSC2 TCAP/PD7 TCMP PD5 PC0 PC1 PC2 PC3 PC4 PC5 PC6 PC7
Figure 1-2. Pin Assignments
1.7 Signal Description
The following paragraphs provide a description of the signals.
1.7.1 VDD and VSS Power is supplied to the microcontroller through VDD and VSS. VDD is the power supply and VSS is ground.
MC68HC05P4A -- Rev. 7.0 MOTOROLA General Description
Technical Data 21
General Description
1.7.2 IRQ This pin has a mask option that provides two different choices of interrupt triggering sensitivity. The IRQ pin contains an internal Schmitt trigger as part of its input to improve noise immunity. Refer to Section 3. Central Processor Unit (CPU) for more detail.
1.7.3 OSC1 and OSC2 These pins provide control input for an on-chip clock oscillator circuit. A crystal, a ceramic resonator, a resistor/capacitor combination, or an external signal connects to these pins and provides a system clock. A mask option selects either a crystal/ceramic resonator or a resistor/capacitor as the frequency determining element. The oscillator frequency is two times the internal bus rate.
1.7.4 RESET This active low pin is used to reset the MCU to a known startup state by pulling RESET low. The RESET pin contains an internal Schmitt trigger as part of its input to improve noise immunity.
1.7.5 TCMP This pin provides an output for the output compare feature of the on-chip timer system.
1.7.6 PA0-PA7 Port A is an 8-bit bidirectional port which does not share any of its pins with other subsystems. The port A data register is at $0000, and the data direction register is at $0004. Reset does not affect the data registers, but clears the data direction registers, thereby returning the ports to inputs. Writing a 1 to a data direction register (DDR) bit sets the corresponding port bit to output mode. Port A has mask option enabled pullup devices and interrupt capability by pin. For a detailed description of I/O programming, refer to 1.8 Input/Output Programming.
Technical Data 22 General Description MC68HC05P4A -- Rev. 7.0 MOTOROLA
General Description Signal Description
VDD
VDD MASK OPTION DDR BIT IRQ SCHMITT TRIGGER
PA0 NORMAL PORT CIRCUITRY TO INTERRUPT LOGIC FROM ALL OTHER PORT A PINS
Figure 1-3. Port A Pullup Option
1.7.7 SDO/PB5, SDI/PB6, and SCK/PB7 Port B is a 3-bit bidirectional port. These pins are shared with the SIOP subsystem. Refer to Section 7. Simple Serial Input/Output Port (SIOP) for a detailed description of the SIOP. The address of the port B data register is $0001, and the data direction register is at address $0005. Reset does not affect the data registers, but clears the data direction registers, thereby returning the ports to inputs. Writing a 1 to a DDR bit sets the corresponding port bit to output mode.
1.7.8 PC0-PC7 Port C is an 8-bit bidirectional port which does not share any of its pins with other subsystems. The address of the port C data register is $0002, and the DDR is at address $0006. Reset does not affect the data registers, but clears the data direction registers, thereby returning the ports to inputs. Writing a 1 to a DDR bit sets the corresponding port bit to output mode. Two of the port C pins, PC0 and PC1, have a higher current drive capability. See Section 12. Electrical Specifications.
MC68HC05P4A -- Rev. 7.0 MOTOROLA General Description
Technical Data 23
General Description
1.7.9 PD5 and TCAP/PD7 Port D is a 2-bit port. PD5 is I/O and TCAP/PD7 is input-only shared with the timer input capture. The address of the port D data register is $0003, and the data direction register is at address $0007. Reset does not affect the data registers, but clears the data direction registers, thereby returning the ports to inputs. Writing a 1 to a DDR bit sets the corresponding port bit to output mode. The TCAP/PD7 pin controls the input capture feature for the on-chip programmable timer. This pin can be read at any time even if the TCAP function is enabled.
1.8 Input/Output Programming
Port pins may be programmed as inputs or outputs under software control. The direction of the pins is determined by the state of the corresponding bit in the port data direction register (DDR). Each I/O port has an associated DDR. Any I/O port pin is configured as an output if its corresponding DDR bit is set to a logic 1. A pin is configured as an input if its corresponding DDR bit is cleared to a logic 0. At power-on or reset, all DDRs are cleared, which configures all pins as inputs. The data direction registers are capable of being written to or read by the processor. During the programmed output state, a read of the data register actually reads the value of the output data latch and not the I/O pin. For further information, see Table 1-1 and Figure 1-4. Table 1-1. I/O Pin Functions
R/W(1) 0 0 1 1 DDR 0 1 0 1 I/O Pin Function The I/O pin is in input mode. Data is written into the output data latch. Data is written into the output data latch and output to the I/O pin. The state of the I/O pin is read. The I/O pin is in an output mode. The output data latch is read.
1. R/W is an internal signal.
Technical Data 24 General Description
MC68HC05P4A -- Rev. 7.0 MOTOROLA
General Description Input/Output Programming
DATA DIRECTION INTERNAL HC05 CONNECTIONS REGISTER BIT
LATCHED OUTPUT DATA BIT
OUTPUT
I/O PIN
INPUT REG BIT
INPUT I/O
Figure 1-4. I/O Circuitry
MC68HC05P4A -- Rev. 7.0 MOTOROLA General Description
Technical Data 25
General Description
Technical Data 26 General Description
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 2. Memory Map
2.1 Contents
2.2 2.3 2.4 2.5 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ROM Security Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.2 Introduction
The MC68HC05P4A has an 8-Kbyte memory map, consisting of user read-only memory (ROM), user random-access memory (RAM), self-check ROM, and input/output (I/O). See Figure 2-1 and Figure 2-2.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Memory Map
Technical Data 27
Memory Map
$0000 $0020 $0050
I/O 32 Bytes User ROM (Page Zero) 48 Bytes RAM 176 Bytes
0000 0032 0080
$0100
Stack 64 Bytes 0256
User ROM 4096 Bytes
$1100 Unused 3584 Bytes
4352
$1F00
Self-Check ROM 240 Bytes Self-Check Vectors User Vectors 16 Bytes
7936
$1FE0 $1FF0 $1FFF
8160 8176 8191
Figure 2-1. Memory Map
Technical Data 28 Memory Map
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Memory Map Introduction
Addr.
Register Name Read: Port A Data Register Write: (PORTA) Reset: Read: Port B Data Register Write: (PORTB) Reset: Read: Port C Data Register Write: (PORTC) Reset: Read: Port D Data Register Write: (PORTD) Reset:
Bit 7 PA7
6 PA6
5 PA5
4 PA4
3 PA3
2 PA2
1 PA1
Bit 0 PA0
$0000
Unaffected by reset PB7 PB6 PB5 0 0 0 0 0
$0001
Unaffected by reset PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
$0002
Unaffected by reset PD7 0 PD5 1 0 0 0 0
$0003
Unaffected by reset DDRA6 0 DDRB6 0 DDRA5 0 DDRB5 0 DDRC5 0 DDRD5 0 DDRA4 0 1 DDRA3 0 1 DDRA2 0 1 DDRA1 0 1 DDRA0 0 1
$0004
Read: DDRA7 Port A Data Direction Write: (DDRA) Reset: 0 Read: DDRB7 Port B Data Direction Write: (DDRB) Reset: 0
$0005
0 DDRC4 0 0
0 DDRC3 0 0
0 DDRC2 0 0
0 DDRC1 0 0
0 DDRC0 0 0
$0006
Read: DDRC7 DDRC6 Port C Data Direction Write: (DDRC) Reset: 0 0 Read: Port D Data Direction Write: (DDRD) Reset: Unimplemented Unimplemented Read: SIOP Control Register Write: (SCR) Reset: 0 0 0
$0007
0
0
0
0
0
0
0
$0008 $0009
$000A
SPE 0
0
MSTR 0 U = Unaffected
0
0
0
0
0
0
0
0 X = Indeterminate
0
0
= Unimplemented
Figure 2-2. I/O Registers for the MC68HC05P4A (Sheet 1 of 3)
MC68HC05P4A -- Rev. 7.0 MOTOROLA Memory Map Technical Data 29
Memory Map
Addr.
Register Name Read: SIOP Status Register Write: (SSR) Reset:
Bit 7 SPIF 0
6 DCOL
5 0
4 0
3 0
2 0
1 0
Bit 0 0
$000B
0 BIT 6
0 BIT 5
0 BIT 4
0 BIT 3
0 BIT 2
0 BIT 1
0 BIT 0
$000C
Read: BIT 7 SIOP Data Register Write: (SDR) Reset: Unimplemented Unimplemented Unimplemented Unimplemented Unimplemented Read: Timer Control Register Write: (TCR) Reset: Read: Timer Status Register Write: (TSR) Reset:
Unaffected by reset
$000D $000E $000F $0010 $0011
$0012
ICIE 0 ICF
OCIE 0 OCF
TOIE 0 TOF
0
0
0
IEDG 0 0
OLVL 0 0
0 0
0 0
0 0
$0013
U
U ICRH6
U ICRH5
0 ICRH4
0 ICRH3
0 ICRH2
0 ICRH1
0 ICRH0
$0014
Read: ICRH7 Input Capture MSB Write: (ICRH) Reset: Read: ICRL7 Input Capture LSB Write: (ICRL) Reset:
Unaffected by reset ICRL6 ICRL5 ICRL4 ICRL3 ICRL2 ICRL1 ICRL0
$0015
Unaffected by reset OCRH5 OCRH4 OCRH3 OCRH2 OCRH1 OCRH0
$0016
Read: OCRH7 OCRH6 Output Compare MSB Write: (OCRH) Reset:
Unaffected by reset U = Unaffected X = Indeterminate
= Unimplemented
Figure 2-2. I/O Registers for the MC68HC05P4A (Sheet 2 of 3)
Technical Data 30 Memory Map
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Memory Map Introduction
Addr.
Register Name
Bit 7
6 OCRL6
5 OCRL5
4 OCRL4
3 OCRL3
2 OCRL2
1 OCRL1
Bit 0 OCRL0
$0017
Read: OCRL7 Output Compare LSB Write: (OCRL) Reset: Read: CRH7 Counter MSB Write: (CRH) Reset: Read: CRL7 Counter LSB Write: (CRL) Reset:
Unaffected by reset CRH6 CRH5 CRH4 CRH3 CRH2 CRH1 CRH0
$0018
Unaffected by reset CRL6 CRL5 CRL4 CRL3 CRL2 CRL1 CRL0
$0019
Unaffected by reset DTMH5 DTMH4 DTMH3 DTMH2 DTMH1 DTMH0
$001A
Read: DTMH7 DTMH6 Dual Timer MSB (DTMH) Write: Counter Alternate Register Reset: Read: DTML7 Dual Timer LSB (DTML) Write: Counter Alternate Register Reset: Unimplemented Unimplemented Unimplemented Reserved R R DTML6
Unaffected by reset DTML5 DTML4 DTML3 DTML2 DTML1 DTML0
$001B
Unaffected by reset
$001C $001D $001E $001F
R
R U = Unaffected
R
R X = Indeterminate
R
R
= Unimplemented
Figure 2-2. I/O Registers for the MC68HC05P4A (Sheet 3 of 3)
MC68HC05P4A -- Rev. 7.0 MOTOROLA Memory Map
Technical Data 31
Memory Map 2.3 ROM
The user ROM consists of 48 bytes of page zero ROM from $0020 to $004F, 4096 bytes of ROM from $0100 to $10FF, and 16 bytes of user vectors from $1FF0 to $1FFF. The self-check ROM and vectors are located from $1F00 to $1FEF.
2.4 ROM Security Feature
A security feature(1) has been incorporated into the MC68HC05P4A to help prevent external reading of code in the ROM. Placing unique customer code at ROM locations $0028-$002F aids in keeping customer developed software proprietary.
2.5 RAM
The user RAM consists of 176 bytes of a shared stack area. The stack begins at address $00FF. The stack pointer can access 64 bytes of RAM in the range $00FF to $00C0.
NOTE:
Using the stack area for data storage or temporary work locations requires care to prevent it from being overwritten due to stacking from an interrupt or subroutine call.
1. No security feature is absolutely secure. However, Motorola's strategy is to make reading or copying the ROM difficult for unauthorized users.
Technical Data 32 Memory Map
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 3. Central Processor Unit (CPU)
3.1 Contents
3.2 3.3 3.4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Index Register (X). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.5 Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.1 H -- Half Carry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.2 I -- Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 3.5.3 N -- Negative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5.4 Z -- Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.5.5 C -- Carry/Borrow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.6 3.7 Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.2 Introduction
This section describes the five CPU registers. CPU registers are not part of the memory map.
3.3 Accumulator (A)
The accumulator is a general-purpose 8-bit register used to hold operands and results of arithmetic calculations or data manipulations.
7 A 0
MC68HC05P4A -- Rev. 7.0 MOTOROLA Central Processor Unit (CPU)
Technical Data 33
Central Processor Unit (CPU) 3.4 Index Register (X)
The index register is an 8-bit register used for the indexed addressing value to create an effective address. The index register also may be used as a temporary storage area.
7 X 0
3.5 Condition Code Register (CCR)
The CCR is a 5-bit register in which four bits are used to indicate the results of the instruction just executed, and the fifth bit indicates whether interrupts are masked. These bits can be tested individually by a program, and specific actions can be taken as a result of their state. Each bit is explained in the following paragraphs.
CCR H I N Z C
3.5.1 H -- Half Carry This bit is set during ADD and ADC operations to indicate that a carry occurred between bits 3 and 4.
3.5.2 I -- Interrupt When this bit is set, timer and external interrupts are masked (disabled). If an interrupt occurs while this bit is set, the interrupt is latched and processed as soon as the interrupt bit is cleared.
3.5.3 N -- Negative When set, this bit indicates that the result of the last arithmetic, logical, or data manipulation was negative.
Technical Data 34 Central Processor Unit (CPU)
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Central Processor Unit (CPU) Stack Pointer (SP)
3.5.4 Z -- Zero When set, this bit indicates that the result of the last arithmetic, logical, or data manipulation was 0.
3.5.5 C -- Carry/Borrow When set, this bit indicates that a carry or borrow out of the arithmetic logical unit (ALU) occurred during the last arithmetic operation. This bit is also affected during bit test and branch instructions and during shifts and rotates.
3.6 Stack Pointer (SP)
The stack pointer contains the address of the next free location on the stack. During an MCU reset or the reset stack pointer (RSP) instruction, the stack pointer is set to location $00FF. The stack pointer is then decremented as data is pushed onto the stack and incremented as data is pulled from the stack. When accessing memory, the seven most significant bits (MSB) are permanently set to 0000011. These seven bits are appended to the six least significant bits (LSB) to produce an address within the range of $00FF to $00C0. Subroutines and interrupts may use up to 64 (decimal) locations. If 64 locations are exceeded, the stack pointer wraps around and loses the previously stored information. A subroutine call occupies two locations on the stack; an interrupt uses five locations.
12 0 0 0 0 0 1 7 1 SP 0
MC68HC05P4A -- Rev. 7.0 MOTOROLA Central Processor Unit (CPU)
Technical Data 35
Central Processor Unit (CPU) 3.7 Program Counter (PC)
The program counter is a 13-bit register that contains the address of the next byte to be fetched.
12 PC 0
NOTE:
The HC05 CPU core is capable of addressing a 64-Kbyte memory map. For this implementation, however, the addressing registers are limited to an 8-Kbyte memory map.
Technical Data 36 Central Processor Unit (CPU)
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 4. Interrupts
4.1 Contents
4.2 4.3 4.4 4.5 4.6 4.7 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Hardware Controlled Interrupt Sequence . . . . . . . . . . . . . . . . . 38 Timer Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 External Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Optional External Interrupts (PA0-PA7) . . . . . . . . . . . . . . . . . . 42 Software Interrupt (SWI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
4.2 Introduction
The MCU can be interrupted four different ways: * * * Two maskable hardware interrupts, IRQ and timer Non-maskable software interrupt instruction (SWI) Optional external asynchronous interrupt on each port A pin (enabled by pullup mask option)
Interrupts cause the processor to save register contents on the stack and to set the interrupt mask (I bit) to prevent additional interrupts. The return to interrupt (RTI) instruction causes the register contents to be recovered from the stack and normal processing to resume. Unlike RESET, hardware interrupts do not cause the current instruction execution to be halted, but are considered pending until the current instruction is complete.
NOTE:
The current instruction is the one already fetched and being operated on.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Interrupts
Technical Data 37
Interrupts
When the current instruction is complete, the processor checks all pending hardware interrupts. If interrupts are not masked (CCR I bit clear) and if the corresponding interrupt enable bit is set, the processor proceeds with interrupt processing; otherwise, the next instruction is fetched and executed. If both an external interrupt and a timer interrupt are pending at the end of an instruction execution, the external interrupt is serviced first. The SWI is executed the same as any other instruction, regardless of the I-bit state. Table 4-1 lists vector addresses for all interrupts including reset. Table 4-1. Vector Address for Interrupts and Reset
Register N/A N/A N/A TSR TSR TSR Flag Name N/A N/A N/A ICF OCF TOF Reset Software External interrupt Timer input capture Timer output capture Timer overflow Interrupts CPU Interrupt RESET SWI IRQ TIMER TIMER TIMER Vector Address $1FFE-$1FFF $1FFC-$1FFD $1FFA-$1FFB $1FF8-$1FF9 $1FF8-$1FF9 $1FF8-$1FF9
4.3 Hardware Controlled Interrupt Sequence
RESET, STOP, and WAIT are not interrupts in the strictest sense. However, they are acted upon in a similar manner. Flowcharts for hardware interrupts are shown in Figure 4-1 and for STOP and WAIT in Figure 6-1. STOP/WAIT Flowchart. A discussion is provided here. 1. RESET -- A low input on the RESET input pin causes the program to vector to its starting address, which is specified by the contents of memory locations $1FFE and $1FFF. The I bit in the condition code register also is set. Much of the MCU is configured to a known state during this type of reset as described in Section 5. Resets.
Technical Data 38 Interrupts
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Interrupts Hardware Controlled Interrupt Sequence
FROM RESET
Y
IS I BIT SET N IRQ EXTERNAL INTERRUPT N TIMER INTERNAL INTERRUPT N FETCH NEXT INSTRUCTION
Y
CLEAR IRQ REQUEST LATCH
Y
STACK PC, X, A, CC
SET I BIT
EXECUTE INSTRUCTION
LOAD PC FROM: IRQ: $1FFA-$1FFB TIMER: $1FF8-$1FF9
COMPLETE INTERRUPT ROUTINE AND EXECUTE RTI
Figure 4-1. Hardware Interrupt Flowchart
MC68HC05P4A -- Rev. 7.0 MOTOROLA Interrupts
Technical Data 39
Interrupts
2. STOP -- The STOP instruction causes the oscillator to be turned off and the processor to "sleep" until an external interrupt (IRQ) or reset occurs. 3. WAIT or HALT -- The WAIT or HALT instruction causes all processor clocks to stop, but leaves the timer clock running. This rest state of the processor can be cleared by reset, an external interrupt (IRQ), or timer interrupt. These individual interrupts have no special wait vectors. See 6.4 WAIT Instruction.
4.4 Timer Interrupt
Three different timer interrupt flags cause a timer interrupt when they are set and enabled. The interrupt flags are in the timer status register (TSR), and the enable bits are in the timer control register (TCR). Any of these interrupts will vector to the same interrupt service routine, located at the address specified by the contents of memory locations $1FF8 and $1FF9.
4.5 External Interrupt
The IRQ pin drives an asynchronous interrupt to the CPU. An edge detector flip-flop is latched on the falling edge of IRQ. If either the output from the internal edge detector flip-flops or the level on the IRQ pin is low, a request is synchronized to the CPU to generate the IRQ interrupt. If the edge-sensitive only mask 0ption is selected, the output of the internal edge detector flip-flop is sampled and the input level on the IRQ pin is ignored. The interrupt service routine address is specified by the contents of memory locations $1FFA and $1FFB. A block diagram of the IRQ function is shown in Figure 4-2.
NOTE:
The internal interrupt latch is cleared nine PH2 clock cycles after the interrupt is recognized (after location $1FFA is read). Therefore, another external interrupt pulse can be latched during the IRQ service routine.
Technical Data 40 Interrupts
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Interrupts External Interrupt
IRQ PIN
PA0 DDRA0 PA0 IRQ INHIBIT (MASK OPTION)
TO BIH & BIL INSTRUCTION SENSING
VDD IRQ LATCH R
PA7 DDRA7 PA7 IRQ INHIBIT (MASK OPTION)
TO IRQ PROCESSING IN CPU
RST
IRQ VECTOR FETCH MASK OPTION (IRQ LEVEL)
Figure 4-2. IRQ Function Block Diagram
NOTE:
When the edge- and level-sensitive mask option is selected, the voltage applied to the IRQ pin must return to the high state before the RTI instruction in the interrupt service routine is executed to avoid the processor re-entering the IRQ service routine. The IRQ pin is one source of an IRQ interrupt and a mask option can also enable the port A pins (PA0-PA7) to act as other IRQ interrupt sources. These sources are all combined into a single ORing function to be latched by the IRQ latch. Any enabled IRQ interrupt source sets the IRQ latch on the falling edge of the IRQ pin or a port A pin if port A interrupts have been enabled. If edge-only sensitivity is chosen by a mask option, only the IRQ latch output can activate a request to the CPU to generate the IRQ interrupt sequence. This makes the IRQ interrupt sensitive to: 1. Falling edge on the IRQ pin with all enabled port A interrupt pins at a high level 2. Falling edge on any enabled port A interrupt pin with all other enabled port A interrupt pins and the IRQ pin at a high level
MC68HC05P4A -- Rev. 7.0 MOTOROLA Interrupts
Technical Data 41
Interrupts
If level sensitivity is chosen, the active high state of the IRQ input can also activate an IRQ request to the CPU to generate the IRQ interrupt sequence. This makes the IRQ interrupt sensitive to: 1. Low level on the IRQ pin 2. Falling edge on the IRQ pin with all enabled port A interrupt pins at a high level 3. Low level on any enabled port A interrupt pin 4. Falling edge on any enabled port A interrupt pin with all enabled port A interrupt pins on the IRQ pin at a high level This interrupt is serviced by the interrupt service routine located at the address specified by the contents of $1FFA and $1FFB. The IRQ latch is automatically cleared by entering the interrupt service routine.
4.6 Optional External Interrupts (PA0-PA7)
The IRQ interrupt can be triggered by the inputs on the PA0-PA7 port pins if enabled by individual mask options. With pullup enabled, each port A pin can activate the IRQ interrupt function and the interrupt operation will be the same as for inputs to the IRQ pin. Once enabled by mask option, each individual port A pin can be disabled as an interrupt source if its corresponding DDR bit is configured for output mode.
NOTE:
The BIH and BIL instructions apply to the output of the logic OR function of the enabled PA0-PA7 interrupt pins and the IRQ pin. The BIH and BIL instructions do not exclusively test the state of the IRQ pin. If enabled, the PA0-PA7 pins will cause an IRQ interrupt only if these individual pins are configured as inputs.
Technical Data 42 Interrupts
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Interrupts Software Interrupt (SWI)
4.7 Software Interrupt (SWI)
The SWI is an executable instruction and a non-maskable interrupt. It is executed regardless of the state of the I bit in the CCR. If the I bit is 0 (interrupts enabled), SWI executes after interrupts which were pending when the SWI was fetched but before interrupts generated after the SWI was fetched. The interrupt service routine address is specified by the contents of memory locations $1FFC and $1FFD.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Interrupts
Technical Data 43
Interrupts
Technical Data 44 Interrupts
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 5. Resets
5.1 Contents
5.2 5.3 5.4 5.5 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 RESET Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Computer Operating Properly (COP) Reset . . . . . . . . . . . . . . . 46
5.2 Introduction
The MCU can be reset three ways: 1. Initial power-on reset function 2. Active low input to the RESET pin 3. Computer operating properly (COP) watchdog timer timeout
5.3 Power-On Reset (POR)
An internal reset is generated on power-up to allow the internal clock generator to stabilize. The power-on reset is strictly for power turn-on conditions and should not be used to detect a drop in the power supply voltage. There is a 4064 internal processor clock cycle (tcyc) oscillator stabilization delay after the oscillator becomes active. If the RESET pin is low at the end of this 4064-cycle delay, the MCU will remain in the reset condition until RESET goes high.
5.4 RESET Pin
The MCU is reset when a logic 0 is applied to the RESET input for a period of one and one-half machine cycles (tcyc).
MC68HC05P4A -- Rev. 7.0 MOTOROLA Resets Technical Data 45
Resets 5.5 Computer Operating Properly (COP) Reset
The MCU contains a watchdog timer that automatically times out if not reset (cleared) within a specific time by a program reset sequence. If the COP watchdog timer is allowed to time out, an internal reset is generated to reset the MCU. Because the internal RESET signal is used, the MCU comes out of a COP reset in the same operating mode it was in when the COP timeout was generated. The COP reset function is enabled or disabled by a mask option. Refer to Section 9. Computer Operating Properly (COP) for more information on the COP.
t VDDR V DD Threshold (1-2 V Typical)
V
DD
OSC1
2 t 4064 t OXOV cyc t
NOTES: 1. Internal timing signal and bus information are not available externally. Internal 2. 1 Clock OSC1 line is not meant to represent frequency. It is only used to represent time. 3. The next rising edge of the internal processor clock following the rising edge of RESET initiates the reset sequence.
Internal Address 1 Bus
cyc
1FFE
1FFF
New PC
1FFE
1FFE
1FFE
1FFE
1FFF
New PC
Internal Data 1 Bus
New PCH
New PCL
Op Code t RL
PCH PCL
PCL
Op PCH Code
RESET
3
Figure 5-1. Power-On Reset and RESET
Technical Data 46 Resets
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 6. Low-Power Modes
6.1 Contents
6.2 6.3 6.4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 WAIT Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.2 Introduction
The MC68HC05P4A is capable of running in a low-power mode in each of its configurations. The WAIT and STOP instructions provide two modes that reduce the power required for the MCU by stopping various internal clocks and/or the on-chip oscillator. The STOP and WAIT instructions are not normally used if the computer operating properly (COP) watchdog timer is enabled. The flow of the stop and wait modes is shown in Figure 6-1.
6.3 Stop Mode
Execution of the STOP instruction places the MCU in its lowest power consumption mode. In stop mode, the internal oscillator is turned off, halting all internal processing, including the COP watchdog timer. Execution of the STOP instruction automatically clears the I bit in the condition code register so that the IRQ external interrupt is enabled. All other registers and memory remain unaltered. All input/output lines remain unchanged. The MCU can be brought out of stop mode only by an IRQ external interrupt or an externally generated RESET. When exiting the stop mode, the internal oscillator will resume after a 4064 PH2 clock cycle oscillator stabilization delay.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Low-Power Modes Technical Data 47
Low-Power Modes 6.4 WAIT Instruction
The WAIT instruction places the MCU in a low-power mode, which consumes more power than stop mode. In wait mode, the PH2 clock is halted, suspending all processor and internal bus activity. Internal timer clocks remain active, permitting interrupts to be generated from the 16-bit timer and reset to be generated from the COP watchdog timer. Execution of the WAIT instruction automatically clears the I bit in the condition code register enabling the IRQ external interrupt. All other registers, memory, and input/output lines remain in their previous state. If the 16-bit timer interrupt is enabled, it will cause the processor to exit wait mode and resume normal operation. The 16-bit timer may be used to generate a periodic exit from wait mode. The wait mode may also be exited when an IRQ external interrupt or RESET occurs.
Technical Data 48 Low-Power Modes
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Low-Power Modes WAIT Instruction
STOP
WAIT
STOP TO HALT MASK N STOP EXTERNAL OSCILLATOR, STOP INTERNAL TIMER CLOCK, RESET STARTUP DELAY EXTERNAL OSCILLATOR ACTIVE AND INTERNAL TIMER CLOCK ACTIVE
STOP INTERNAL PROCESSOR CLOCK, CLEAR I-BIT IN CCR
STOP INTERNAL PROCESSOR CLOCK, CLEAR I-BIT IN CCR
EXTERNAL RESET? N IRQ EXTERNAL INTERRUPT? N
Y
Y
EXTERNAL RESET? N
Y RESTART EXTERNAL OSCILLATOR, RESTART STABILIZATION DELAY
Y
IRQ EXTERNAL INTERRUPT? N
Y
TIMER INTERNAL INTERRUPT? N
END OF STABILIZATION DELAY?
Y Y COP INTERNAL RESET? N
RESTART INTERNAL PROCESSOR CLOCK 1. FETCH RESET VECTOR OR 2. SERVICE INTERRUPT a. STACK b. SET I BIT c. VECTOR TO INTERRUPT ROUTINE
Figure 6-1. STOP/WAIT Flowchart
MC68HC05P4A -- Rev. 7.0 MOTOROLA Low-Power Modes
Technical Data 49
Low-Power Modes
Technical Data 50 Low-Power Modes
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 7. Simple Serial Input/Output Port (SIOP)
7.1 Contents
7.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3 Signal Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 7.3.1 Serial Clock (SCK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 7.3.2 Serial Data Out (SDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 7.3.3 Serial Data In (SDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 7.4 SIOP Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54 7.4.1 SIOP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 7.4.2 SIOP Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55 7.4.3 SIOP Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.2 Introduction
This device includes a simple synchronous serial input/output (SIOP) port. The SIOP is a 3-wire master/slave system including serial clock (SCK), serial data input (SDI), and serial data output (SDO). A mask programmable option determines whether the SIOP is most significant bit (MSB) or least significant bit (LSB) first.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Simple Serial Input/Output Port (SIOP)
Technical Data 51
Simple Serial Input/Output Port (SIOP)
RESET
R D C
Q
SDO
SCK SDI
8-BIT SHIFT REGISTER
MSB/LSB MASK OPTION
DATA BUS
Figure 7-1. SIOP Block Diagram
7.3 Signal Format
The SIOP signal format is described here.
7.3.1 Serial Clock (SCK) The state of SCK between transmissions must be logic 1. The first falling edge of SCK signals the beginning of a transmission. At this time, the first bit of received data is accepted at the SDI pin and the first bit of transmitted data is presented at the SDO pin. Data is captured at the SDI pin on the rising edge of SCK. Subsequent falling edges shift the data and accept or present the next bit. The transmission is ended upon the eighth rising edge of SCK. The maximum frequency of SCK in slave mode is equal to E (bus clock) divided by four. That is, for a 4-MHz oscillator input, E becomes 2 MHz and the maximum SCK frequency is 0.5 MHz. There is no minimum SCK frequency. In master mode, the format is identical except that the SCK pin is an output and the shift clock now originates internally. The master mode transmission frequency is fixed at E/4.
Technical Data 52 Simple Serial Input/Output Port (SIOP)
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Simple Serial Input/Output Port (SIOP) Signal Format
7.3.2 Serial Data Out (SDO) A mask programmable option will be included to allow data to be transmitted in either MSB first format or LSB first format. In either case, the state of the SDO pin always will reflect the value of the first bit received on the previous transmission if there was one. Prior to enabling the SIOP, PB5 can be initialized to determine the beginning state if necessary. While the SIOP is enabled, PB5 can not be used as a standard output since that pin is coupled to the last stage of the serial shift register. On the first falling edge of SCK, the first data bit to be shifted out is presented to the output pin.
7.3.3 Serial Data In (SDI) The SDI pin becomes an input as soon as the SIOP is enabled. New data may be presented to the SDI pin on the falling edge of SCK. Valid data must be present at least 100 ns before the rising edge of the clock and remain valid for 100 ns after the edge.
SCK SDO SDI
BIT 1 BIT 2 BIT 3 BIT 7 BIT 8
BIT 1
BIT 2
BIT 3
BIT 7
BIT 8
Figure 7-2. Serial I/O Port Timing
MC68HC05P4A -- Rev. 7.0 MOTOROLA Simple Serial Input/Output Port (SIOP)
Technical Data 53
Simple Serial Input/Output Port (SIOP) 7.4 SIOP Registers
The SIOP registers are described here.
7.4.1 SIOP Control Register This register is located at address $000A and contains two bits.
Address: $000A Bit 7 Read: Write: Reset: 0 0 6 SPE 0 5 0 4 MSTR 0 3 0 2 0 1 0 Bit 0 0
0
0
0
0
0
= Unimplemented
Figure 7-3. SIOP Control Register (SCR) SPE -- Serial Peripheral Enable Bit When set, this bit enables the serial I/O port and initializes the port B DDR such that PB5 (SDO) is output, PB6 (SDI) is input, and PB7 (SCK) is input (slave mode only). The port B DDR can be altered subsequently as the application requires and the port B data register (except for PB5) can be manipulated as usual. However, these actions could affect the transmitted or received data. When SPE is cleared, port B reverts to standard parallel I/O without affecting the port B data register or DDR. SPE is readable and writable any time but clearing SPE while a transmission is in progress will abort the transmission, reset the bit counter, and return port B to its normal I/O function. Reset clears this bit. MSTR -- Master Mode Bit When set, this bit configures the SIOP for master mode. This means that the transmission is initiated by a write to the data register and the SCK pin becomes an output providing a synchronous data clock at a fixed rate of E (bus clock) divided by four. While the device is in master mode, the SDO and SDI pins do not change function. These pins behave exactly as they would in slave mode. Reset clears this bit
Technical Data 54 Simple Serial Input/Output Port (SIOP)
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Simple Serial Input/Output Port (SIOP) SIOP Registers
and configures the SIOP for slave operation. MSTR may be set at any time regardless of the state of SPE. Clearing MSTR will abort any transmission in progress.
7.4.2 SIOP Status Register This register is located at address $000B and contains only two bits.
Address: $000B Bit 7 Read: Write: Reset: SPIF 0 6 DCOL 5 0 4 0 3 0 2 0 1 0 Bit 0 0
0
0
0
0
0
0
0
= Unimplemented
Figure 7-4. SIOP Status Register (SSR) SPIF -- Serial Peripheral Interface Flag Bit This bit is set upon occurrence of the last rising clock edge and indicates that a data transfer has taken place. It has no effect on any further transmissions and can be ignored without problem. SPIF is cleared by reading the SSR with SPIF set followed by a read or write of the serial data register. If it is cleared before the last edge of the next byte, it will be set again. Reset clears this bit. DCOL -- Data Collision Bit This is a read-only status bit which indicates that an invalid access to the data register has been made. This can occur any time after the first falling edge of SCK and before SPIF is set. A read or write of the data register during this time will result in invalid data being transmitted or received.
NOTE:
DCOL is cleared by reading the status register with SPIF set followed by a read or write of the data register. If the last part of the clearing sequence is done after another transmission has been started, DCOL will be set again. If the DCOL bit is set and the SPIF is not set, clearing the DCOL requires turning the SIOP off then turning it back on. Reset also clears this bit.
Technical Data Simple Serial Input/Output Port (SIOP) 55
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Simple Serial Input/Output Port (SIOP)
7.4.3 SIOP Data Register This register is located at address $000C and is both the transmit and receive data register. This system is not double buffered and any write to this register will destroy the previous contents. The SDR can be read at any time, but if a transmission is in progress the results may be ambiguous. Writes to the SDR while a transmission is in progress can cause invalid data to be transmitted and/or received. This register can be read and written only when the SIOP is enabled (SPE = 1).
Address: $000C Bit 7 Read: Write: Reset: BIT 7 6 BIT 6 5 BIT 5 4 BIT 4 3 BIT 3 2 BIT 2 1 BIT 1 Bit 0 BIT 0
Unaffected by reset
Figure 7-5. SIOP Data Register (SDR)
Technical Data 56 Simple Serial Input/Output Port (SIOP)
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 8. Timer
8.1 Contents
8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Output Compare Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Input Capture Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Timer Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Timer Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Timer During Wait or Halt Mode . . . . . . . . . . . . . . . . . . . . . . . . 64 Timer During Stop Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
8.2 Introduction
The timer consists of a 16-bit, software-programmable counter driven by a fixed divide-by-four prescaler. This timer can be used for many purposes, including input waveform measurements while simultaneously generating an output waveform. Pulse widths can vary from several microseconds to many seconds. Refer to Figure 8-1 for a timer block diagram. Each specific functional segment (capability) is represented by two registers. These registers contain the high and low byte of that functional segment. Generally, accessing the low byte of a specific timer function allows full control of that function; however, an access of the high byte inhibits that specific timer function until the low byte also is accessed.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Timer
Technical Data 57
Timer
NOTE:
The I bit in the CCR should be set while manipulating both the high and low byte register of a specific timer function to ensure that an interrupt does not occur.
INTERNAL BUS INTERNAL PROCESSOR CLOCK /4 $16 $17 OUTPUT COMPARE REGISTER HIGH BYTE LOW BYTE
HIGH LOW
BYTE BYTE
8-BIT BUFFER
HIGH
BYTE
LOW BYTE
16-BIT FREE $18 RUNNING $19 COUNTER COUNTER $1A ALTERNATE $1B REGISTER
INPUT $14 CAPTURE $15 REGISTER
OUTPUT COMPARE CIRCUIT
OVERFLOW DETECT CIRCUIT
EDGE DETECT CIRCUIT
TIMER STATUS ICF OCF TOF REG.
$13
OUTPUT LEVEL REG.
DQ CLK C
ICIE
TIMER RESET OCIE TOIE IEDG OLVL CONTROL REG. $12 EDGE OUTPUT INPUT LEVEL (TCAP) (TCMP)
INTERRUPT CIRCUIT
Figure 8-1. Timer Block Diagram
Technical Data 58 Timer
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Timer Counter
8.3 Counter
The key element in the programmable timer is a 16-bit, free-running counter or counter register, preceded by a prescaler that divides the internal processor clock by four. The prescaler gives the timer a resolution of 2.0 microseconds if the internal bus clock is 2.0 MHz. The counter is incremented during the low portion of the internal bus clock. Software can read the counter at any time without affecting its value. The double-byte, free-running counter can be read from either of two locations, $18-$19 (counter register) or $1A-$1B (counter alternate register). A read from only the least significant byte (LSB) of the free-running counter ($19, $1B) receives the count value at the time of the read. If a read of the free-running counter or counter alternate register first addresses the most significant byte (MSB) ($18, $1A), the LSB ($19, $1B) is transferred to a buffer. This buffer value remains fixed after the first MSB read, even if the user reads the MSB several times. This buffer is accessed when reading the free-running counter or counter alternate register LSB ($19 or $1B) and, thus, completes a read sequence of the total counter value. In reading either the free-running counter or counter alternate register, if the MSB is read, the LSB also must be read to complete the sequence. The counter alternate register differs from the counter register in one respect: A read of the counter register MSB can clear the timer overflow flag (TOF). Therefore, the counter alternate register can be read at any time without the possibility of missing timer overflow interrupts due to clearing of the TOF. The free-running counter is configured to $FFFC during reset and is always a read-only register. During a power-on reset, the counter is also preset to $FFFC and begins running after the oscillator startup delay. Because the free-running counter is 16 bits preceded by a fixed divided-by-four prescaler, the value in the free-running counter repeats every 262,144 internal bus clock cycles. When the counter rolls over from $FFFF to $0000, the TOF bit is set. An interrupt can also be enabled when counter rollover occurs by setting its interrupt enable bit (TOIE).
MC68HC05P4A -- Rev. 7.0 MOTOROLA Timer
Technical Data 59
Timer 8.4 Output Compare Register
The 16-bit output compare register is made up of two 8-bit registers at locations $16 (MSB) and $17 (LSB). The output compare register is used for several purposes, such as indicating when a period of time has elapsed. All bits are readable and writable and are not altered by the timer hardware or reset. If the compare function is not needed, the two bytes of the output compare register can be used as storage locations. The output compare register contents are compared with the contents of the free-running counter continually, and if a match is found, the corresponding output compare flag (OCF) bit is set and the corresponding output level (OLVL) bit is clocked to an output level register. The output compare register values and the output level bit should be changed after each successful comparison to establish a new elapsed timeout. An interrupt can also accompany a successful output compare provided the corresponding interrupt enable bit (OCIE) is set. After a processor write cycle to the output compare register containing the MSB ($16), the output compare function is inhibited until the LSB ($17) is also written. The user must write both bytes (locations) if the MSB is written first. A write made only to the LSB ($17) will not inhibit the compare function. The free-running counter is updated every four internal bus clock cycles. The minimum time required to update the output compare register is a function of the program rather than the internal hardware. The processor can write to either byte of the output compare register without affecting the other byte. The output level (OLVL) bit is clocked to the output level register regardless of whether the output compare flag (OCF) is set or clear.
Technical Data 60 Timer
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Timer Input Capture Register
8.5 Input Capture Register
Two 8-bit registers, which make up the 16-bit input capture register, are read-only and are used to latch the value of the free-running counter after the corresponding input capture edge detector senses a defined transition. The level transition which triggers the counter transfer is defined by the corresponding input edge bit (IEDG). Reset does not affect the contents of the input capture register. The result obtained by an input capture will be one more than the value of the free-running counter on the rising edge of the internal bus clock preceding the external transition. This delay is required for internal synchronization. Resolution is one count of the free-running counter, which is four internal bus clock cycles. The free-running counter contents are transferred to the input capture register on each proper signal transition regardless of whether the input capture flag (ICF) is set or clear. The input capture register always contains the free-running counter value that corresponds to the most recent input capture. After a read of the input capture register ($14) MSB, the counter transfer is inhibited until the LSB ($15) is also read. This characteristic causes the time used in the input capture software routine and its interaction with the main program to determine the minimum pulse period. A read of the input capture register LSB ($15) does not inhibit the free-running counter transfer since they occur on opposite edges of the internal bus clock.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Timer
Technical Data 61
Timer 8.6 Timer Control Register
The timer control register (TCR) is a read/write register containing five control bits. Three bits control interrupts associated with the timer status register flags ICF, OCF, and TOF.
Address: $0012 Bit 7 Read: ICIE Write: Reset: 0 0 0 0 0 0 0 0 OCIE TOIE 6 5 4 0 3 0 2 0 IEDG OLVL 1 Bit 0
= Unimplemented
Figure 8-2. Timer Control Register (TCR) ICIE -- Input Capture Interrupt Enable Bit 1 = Interrupt enabled 0 = Interrupt disabled OCIE -- Output Compare Interrupt Enable Bit 1 = Interrupt enabled 0 = Interrupt disabled TOIE -- Timer Overflow Interrupt Enable Bit 1 = Interrupt enabled 0 = Interrupt disabled IEDG -- Input Edge Bit Value of input edge determines which level transition on TCAP pin will trigger free-running counter transfer to the input capture register. Reset does not affect the IEDG bit. 1 = Positive edge 0 = Negative edge OLVL -- Output Level Bit Value of output level is clocked into output level register by the next successful output compare and will appear on the TCMP pin. 1 = High output 0 = Low output
Technical Data 62 Timer MC68HC05P4A -- Rev. 7.0 MOTOROLA
Timer Timer Status Register
Bits 2, 3, and 4 -- Not used Always read 0
8.7 Timer Status Register
The timer status register (TSR) is a read-only register containing three status flag bits.
Address: $0013 Bit 7 Read: Write: Reset: U U U 0 0 0 0 0 ICF 6 OCF 5 TOF 4 0 3 0 2 0 1 0 Bit 0 0
= Unimplemented
Figure 8-3. Timer Status Register (TSR) ICF -- Input Capture Flag Bit 1 = Flag set when selected polarity edge is sensed by input capture edge detector 0 = Flag cleared when TSR and input capture low register ($15) are accessed OCF -- Output Compare Flag Bit 1 = Flag set when output compare register contents match the free-running counter contents 0 = Flag cleared when TSR and output compare low register ($17) are accessed TOF -- Timer Overflow Flag Bit 1 = Flag set when free-running counter transition from $FFFF to $0000 occurs 0 = Flag cleared when TSR and counter low register ($19) are accessed Bits 0-4 -- Not used Always read 0
MC68HC05P4A -- Rev. 7.0 MOTOROLA Timer
Technical Data 63
Timer
Accessing the timer status register satisfies the first condition required to clear status bits. The remaining step is to access the register corresponding to the status bit. A problem can occur when using the timer overflow function and reading the free-running counter at random times to measure an elapsed time. Without incorporating the proper precautions into software, the timer overflow flag could unintentionally be cleared if: 1. The timer status register is read or written when TOF is set, and 2. The LSB of the free-running counter is read but not for the purpose of servicing the flag. The counter alternate register at address $1A and $1B contains the same value as the free-running counter (at address $18 and $19); therefore, this alternate register can be read at any time without affecting the timer overflow flag in the timer status register.
8.8 Timer During Wait or Halt Mode
The CPU clock halts during the wait or halt mode, but the timer remains active. If interrupts are enabled, a timer interrupt will cause the processor to exit the wait mode.
8.9 Timer During Stop Mode
In stop mode, the timer stops counting and holds the last count value if stop is exited by an interrupt. If RESET is used, the counter is forced to $FFFC. During stop, if at least one valid input capture edge occurs at the TCAP pin, the input capture detect circuit is armed. This does not set any timer flags to wake up the MCU, but when the MCU does wake up, there is an active input capture flag and data from the first valid edge that occurred during stop mode. If RESET is used to exit stop mode, then no input capture flag or data remains, even if a valid input capture edge occurred.
Technical Data 64 Timer
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 9. Computer Operating Properly (COP)
9.1 Contents
9.2 9.3 9.4 9.5 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Resetting the COP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 COP During Wait or Halt Mode. . . . . . . . . . . . . . . . . . . . . . . . . 66 COP During Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.2 Introduction
This device includes a watchdog computer operating properly (COP) feature as a mask option. The COP is implemented with an 18-bit ripple counter. This provides a timeout period of 64 milliseconds at a bus rate of 2 MHz. If the COP should time out, a system reset will occur and the device will be re-initialized in the same fashion as a power-on reset (POR) or external reset.
9.3 Resetting the COP
Preventing a COP reset is done by writing a 0 to the COPR bit. This action will reset the counter and begin the timeout period again. The COPR bit is bit 0 of address $1FF0. A read of address $1FF0 will access the user-defined ROM data at that location.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Computer Operating Properly (COP)
Technical Data 65
Computer Operating Properly (COP) 9.4 COP During Wait or Halt Mode
The COP will continue to operate normally during wait or halt mode. The software should pull the device out of wait or halt mode periodically and reset the COP by writing a logic 0 to the COPR bit to prevent a COP reset.
9.5 COP During Stop Mode
Stop mode disables the oscillator circuit and thereby turns the clock off for the entire device. The COP counter will be reset when stop mode is entered. If a reset is used to exit stop mode, the COP counter will be reset after the 4064 cycles of delay after stop mode. If an IRQ is used to exit stop mode, the COP counter will not be reset after the 4064-cycle delay and will have that many cycles already counted when control is returned to the program.
NOTE:
Halt mode is not intended for normal use. This feature is provided to keep the COP watchdog timer active in the event a STOP instruction is inadvertently executed.
Technical Data 66 Computer Operating Properly (COP)
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 10. Self-Check Mode
10.1 Contents
10.2 10.3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
10.2 Introduction
The self-check program resides at mask ROM (read-only memory) locations $1F00 to $1FEF. This program is designed to check the part's functionality with a minimum of support hardware. The computer operating properly (COP) subsystem is disabled in the self-check mode so that routines that feed the COP do not exist in the self-check program.
10.3 Functional Description
The self-check mode is entered on the rising edge of RESET if the IRQ pin is driven to double the supply voltage and the TCAP/PD7 pin is at logic 1. RESET must be held low for 4064 cycles after power-on reset (POR) or for a time, tRL, for any other reset. After reset, the input/output (I/O), random-access memory (RAM), ROM, timer, simple serial input/output port (SIOP), and interrupts are tested. Self-check results (using light-emitting diodes (LEDs) as monitors) are shown in Table 10-1. It is not recommended that the user code use any of the self-check code. The self-check code is subject to change at any time to improve testability or manufacturability. Figure 10-1 illustrates a self-check circuit.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Self-Check Mode
Technical Data 67
Self-Check Mode
Table 10-1. Self-Check Results
PC2 0 0 0 1 1 1 PC1 0 1 1 0 0 1 Flashing All others
Note: 0 indicates LED is on; 1 indicates LED is off.
V DD 10 k 4.7 k 1 f RESET IRQ PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 SDO/PB5 SDI/PB6 SCK/PB7 VSS V DD VDD 10 k
PC0 1 0 1 0 1 0
Remarks Bad I/O Bad RAM Bad timer Bad ROM Bad serial Bad interrupt Good device Bad device
VTST
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
OSC1 OSC2 TCAP/PD7 TCMP PD5 PC0 PC1 PC2 PC3 PC4 PC5 PC6 PC7 10 M 20 pF 20 pF 4 MHz
470 V = 5.0 V DD VTST = 10.0 V
V
DD
10 K
Figure 10-1. Self-Check Circuit
Technical Data 68 Self-Check Mode MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 11. Instruction Set
11.1 Contents
11.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11.3 Addressing Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 11.3.1 Inherent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 11.3.2 Immediate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 11.3.3 Direct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.4 Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.5 Indexed, No Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.6 Indexed, 8-Bit Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 11.3.7 Indexed, 16-Bit Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72 11.3.8 Relative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 11.4 Instruction Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 11.4.1 Register/Memory Instructions. . . . . . . . . . . . . . . . . . . . . . . . 73 11.4.2 Read-Modify-Write Instructions . . . . . . . . . . . . . . . . . . . . . . 74 11.4.3 Jump/Branch Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . 74 11.4.4 Bit Manipulation Instructions . . . . . . . . . . . . . . . . . . . . . . . . 76 11.4.5 Control Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 11.5 11.6 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
11.2 Introduction
This section describes the M68HC05P4A addressing modes and instruction types.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Instruction Set
Technical Data 69
Instruction Set 11.3 Addressing Modes
The CPU uses eight addressing modes for flexibility in accessing data. The addressing modes define the manner in which the CPU finds the data required to execute an instruction. The addressing modes are: 1. Inherent 2. Immediate 3. Direct 4. Extended 5. Indexed, no offset 6. Indexed, 8-bit offset 7. Indexed, 16-bit offset 8. Relative
11.3.1 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 memory address and are one byte long.
11.3.2 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 memory address and are two bytes long. The opcode is the first byte, and the immediate data value is the second byte.
Technical Data 70 Instruction Set
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Instruction Set Addressing Modes
11.3.3 Direct Direct instructions can access any of the first 256 memory addresses 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. BRSET and BRCLR are 3-byte instructions that use direct addressing to access the operand and relative addressing to specify a branch destination.
11.3.4 Extended Extended instructions use only three bytes to 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.
11.3.5 Indexed, No Offset Indexed instructions with no offset are one-byte instructions that can access data with variable addresses within the first 256 memory locations. The index register contains the low byte of the conditional 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 I/O location.
11.3.6 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 conditional address of the operand. These instructions can access locations $0000-$01FE.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Instruction Set
Technical Data 71
Instruction Set
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). 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.
11.3.7 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 conditional 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. These instructions can address any location in memory. 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.
11.3.8 Relative Relative addressing is only for branch instructions. If the branch condition is true, the CPU finds the conditional 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 72 Instruction Set
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Instruction Set Instruction Types
11.4 Instruction Types
The MCU instructions fall into five categories: 1. Register/memory instructions 2. Read-modify-write instructions 3. Jump/branch instructions 4. Bit manipulation instructions 5. Control instructions
11.4.1 Register/Memory Instructions Most of these instructions use two operands. One operand is in either the accumulator or the index register. The CPU finds the other operand in memory. Table 11-1 lists the register/memory instructions. Table 11-1. 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
MC68HC05P4A -- Rev. 7.0 MOTOROLA Instruction Set
Technical Data 73
Instruction Set
11.4.2 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. The test for negative or zero instruction (TST) is an exception to the read-modify-write sequence because it does not write a replacement value. Table 11-2 lists the read-modify-write instructions. Table 11-2. Read-Modify-Write Instructions
Instruction
Arithmetic shift left Arithmetic shift right Clear bit in memory Set bit in memory Clear Complement (one's complement) Decrement Increment Logical shift left 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 BSET CLR COM DEC INC LSL LSR NEG ROL ROR TST
11.4.3 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. All branch instructions use relative addressing. Bit test and branch instructions cause a branch based on the state of any readable bit in the first 256 memory locations. These 3-byte instructions
Technical Data 74 Instruction Set MC68HC05P4A -- Rev. 7.0 MOTOROLA
Instruction Set Instruction Types
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 conditional 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. Table 11-3 lists the jump and branch instructions. Table 11-3. 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
MC68HC05P4A -- Rev. 7.0 MOTOROLA Instruction Set
Technical Data 75
Instruction Set
11.4.4 Bit Manipulation Instructions The CPU can set or clear any writable bit in the first 256 bytes of memory. Port registers, port data direction registers, timer registers, and on-chip RAM locations are in the first 256 bytes of memory. The CPU can also test and branch based on the state of any bit in any of the first 256 memory locations. Bit manipulation instructions use direct addressing. Table 11-4 lists these instructions. Table 11-4. Bit Manipulation Instructions
Instruction
Clear bit Branch if bit clear Branch if bit set Set bit
Mnemonic
BCLR BRCLR BRSET BSET
11.4.5 Control Instructions These register reference instructions control CPU operation during program execution. Control instructions, listed in Table 11-5, use inherent addressing. Table 11-5. 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 76 Instruction Set
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Instruction Set Instruction Set Summary
11.5 Instruction Set Summary
Table 11-6 is an alphabetical list of all M68HC05 instructions and shows the effect of each instruction on the condition code register. Table 11-6. Instruction Set Summary (Sheet 1 of 6)
Opcode 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
A9 ii 2 B9 dd 3 C9 hh ll 4 D9 ee ff 5 E9 ff 4 F9 3 2 AB ii BB dd 3 CB hh ll 4 DB ee ff 5 4 EB ff 3 FB A4 ii 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 dd 5 3 3 6 5 5 3 3 6 5 3 5 5 5 5 5 5 5 5 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 rr dd dd dd dd dd dd dd dd rr rr rr
Branch if Carry Bit Clear
PC (PC) + 2 + rel ? C = 0
----------
BCLR n opr
Clear Bit n
Mn 0
DIR (b0) DIR (b1) DIR (b2) DIR (b3) ---------- DIR (b4) DIR (b5) DIR (b6) DIR (b7) ---------- ---------- ---------- REL REL REL
BCS rel BEQ rel BHCC rel
Branch if Carry Bit Set (Same as BLO) Branch if Equal Branch if Half-Carry Bit Clear
PC (PC) + 2 + rel ? C = 1 PC (PC) + 2 + rel ? Z = 1 PC (PC) + 2 + rel ? H = 0
MC68HC05P4A -- Rev. 7.0 MOTOROLA Instruction Set
Technical Data 77
Cycles
Effect on CCR
Operand
Address Mode
Instruction Set
Table 11-6. Instruction Set Summary (Sheet 2 of 6)
Opcode Source Form
BHCS rel 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
Operation
Branch if Half-Carry Bit Set Branch if Higher Branch if Higher or Same Branch if IRQ Pin High Branch if IRQ Pin Low
Description
PC (PC) + 2 + rel ? H = 1 PC (PC) + 2 + rel ? C = 0 PC (PC) + 2 + rel ? IRQ = 1 PC (PC) + 2 + rel ? IRQ = 0
H I NZC
---------- PC (PC) + 2 + rel ? C Z = 0 -- -- -- -- -- ---------- ---------- ----------
REL REL REL REL REL IMM DIR EXT IX2 IX1 IX REL REL REL REL REL REL REL REL
29 22 24 2F 2E
rr rr rr rr rr
Bit Test Accumulator with Memory Byte
(A) (M)
---- --
A5 ii 2 B5 dd 3 C5 hh ll 4 D5 ee ff 5 4 E5 ff 3 F5 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 ? 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
----------
PC (PC) + 2 + rel ? C Z = 1 -- -- -- -- -- ---------- ---------- ---------- ---------- ---------- ----------
BRCLR n opr rel Branch if Bit n Clear
PC (PC) + 2 + rel ? Mn = 0
DIR (b0) DIR (b1) DIR (b2) DIR (b3) -------- DIR (b4) DIR (b5) DIR (b6) DIR (b7) ---------- REL
BRN rel
Branch Never
PC (PC) + 2 + rel ? 1 = 0
BRSET n opr rel Branch if Bit n Set
PC (PC) + 2 + rel ? Mn = 1
DIR (b0) DIR (b1) DIR (b2) DIR (b3) -------- DIR (b4) DIR (b5) DIR (b6) DIR (b7) DIR (b0) DIR (b1) DIR (b2) DIR (b3) ---------- DIR (b4) DIR (b5) DIR (b6) DIR (b7)
BSET n opr
Set Bit n
Mn 1
Technical Data 78 Instruction Set
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Cycles
3 3 3 3 3
Effect on CCR
Operand
Address Mode
Instruction Set Instruction Set Summary
Table 11-6. Instruction Set Summary (Sheet 3 of 6)
Opcode 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
CLC CLI CLR opr CLRA CLRX CLR opr,X CLR ,X CMP #opr CMP opr CMP opr CMP opr,X CMP opr,X CMP ,X 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
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
Clear Byte
---- 0 1 --
ff
Compare Accumulator with Memory Byte
(A) - (M)
----
A1 ii 2 B1 dd 3 C1 hh ll 4 D1 ee ff 5 4 E1 ff 3 F1 33 43 53 63 73 dd 5 3 3 6 5
Complement Byte (One's Complement)
M (M) = $FF - (M) A (A) = $FF - (A) X (X) = $FF - (X) M (M) = $FF - (M) M (M) = $FF - (M)
---- 1
ff
Compare Index Register with Memory Byte
(X) - (M)
----
A3 ii 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 (M) - 1 A (A) - 1 X (X) - 1 M (M) - 1 M (M) - 1
---- --
ff
EXCLUSIVE OR Accumulator with Memory Byte
A (A) (M)
---- --
A8 ii 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
MC68HC05P4A -- Rev. 7.0 MOTOROLA Instruction Set
Technical Data 79
Cycles
6 2 2 5 3 3 6 5
Effect on CCR
Operand
Address Mode
Instruction Set
Table 11-6. Instruction Set Summary (Sheet 4 of 6)
Opcode Source Form
JMP opr JMP opr JMP opr,X JMP opr,X JMP ,X JSR opr JSR opr JSR opr,X JSR opr,X JSR ,X LDA #opr LDA opr LDA opr LDA opr,X LDA opr,X LDA ,X LDX #opr LDX opr LDX opr LDX opr,X LDX opr,X LDX ,X 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
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 3 EC ff 2 FC BD dd 5 CD hh ll 6 DD ee ff 7 ED ff 6 5 FD A6 ii 2 B6 dd 3 C6 hh ll 4 D6 ee ff 5 E6 ff 4 F6 3 2 AE ii BE dd 3 CE hh ll 4 DE ee ff 5 4 EE ff 3 FE 38 48 58 68 78 34 44 54 64 74 42 30 40 50 60 70 9D AA BA CA DA EA FA ii dd hh ll ee ff ff dd dd 5 3 3 6 5 5 3 3 6 5 1 1 5 3 3 6 5 2 2 3 4 5 4 3
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)
---- --
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)
---- --
Technical Data 80 Instruction Set
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Cycles
Effect on CCR
Operand
Address Mode
Instruction Set Instruction Set Summary
Table 11-6. Instruction Set Summary (Sheet 5 of 6)
Opcode 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 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
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 opr STX opr STX opr,X STX opr,X STX ,X SUB #opr SUB opr SUB opr SUB opr,X SUB opr,X SUB ,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
Subtract Memory Byte and Carry Bit from Accumulator
A (A) - (M) - (C)
----
A2 ii 2 B2 dd 3 C2 hh ll 4 D2 ee ff 5 E2 ff 4 F2 3 99 9B B7 C7 D7 E7 F7 8E BF CF DF EF FF dd hh ll ee ff ff dd hh ll ee ff ff 2 2 4 5 6 5 4 2 4 5 6 5 4
Set Carry Bit Set Interrupt Mask
C1 I1
-------- 1 -- 1 ------
Store Accumulator in Memory
M (A)
---- --
Stop Oscillator and Enable IRQ Pin
-- 0 ------
Store Index Register In Memory
M (X)
---- --
Subtract Memory Byte from Accumulator
A (A) - (M)
----
A0 ii 2 B0 dd 3 C0 hh ll 4 D0 ee ff 5 E0 ff 4 F0 3
MC68HC05P4A -- Rev. 7.0 MOTOROLA Instruction Set
Technical Data 81
Cycles
5 3 3 6 5 5 3 3 6 5 2 9 6
Effect on CCR
Operand
Address Mode
Instruction Set
Table 11-6. Instruction Set Summary (Sheet 6 of 6)
Opcode Source Form Operation Description Cycles
1 0 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)
---------- -- 0 ------ 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
11.6 Opcode Map
See Table 11-7.
Technical Data 82 Instruction Set
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Operand
ff
Address Mode
Table 11-7. Opcode Map
Bit Manipulation DIR
MSB LSB
MOTOROLA Instruction Set 83
MC68HC05P4A -- Rev. 7.0 Technical Data
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 IMM 2 2 ORA IMM 2 2 ADD IMM 2 2
DIR 1
INH 9
DIR B
3 SUB DIR 3 CMP DIR 3 SBC DIR 3 CPX DIR 3 AND DIR 3 BIT DIR 3 LDA DIR 4 STA DIR 3 EOR DIR 3 ADC DIR 3 ORA DIR 3 ADD DIR 2 JMP DIR 5 JSR DIR 3 LDX DIR 4 STX DIR
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
0 1 2 3 4 5 6 7 8 9 A B C D E F
5 5 3 BRSET0 BSET0 BRA 3 DIR 2 DIR 2 REL 5 5 3 BRCLR0 BCLR0 BRN 3 DIR 2 DIR 2 REL 5 5 3 BRSET1 BSET1 BHI 3 DIR 2 DIR 2 REL 5 5 3 BRCLR1 BCLR1 BLS 3 DIR 2 DIR 2 REL 5 5 3 BRSET2 BSET2 BCC 3 DIR 2 DIR 2 REL 5 5 3 BRCLR2 BCLR2 BCS/BLO 3 DIR 2 DIR 2 REL 5 5 3 BRSET3 BSET3 BNE 3 DIR 2 DIR 2 REL 5 5 3 BRCLR3 BCLR3 BEQ 3 DIR 2 DIR 2 REL 5 5 3 BRSET4 BSET4 BHCC 3 DIR 2 DIR 2 REL 5 5 3 BRCLR4 BCLR4 BHCS 3 DIR 2 DIR 2 REL 5 5 3 BRSET5 BSET5 BPL 3 DIR 2 DIR 2 REL 5 5 3 BRCLR5 BCLR5 BMI 3 DIR 2 DIR 2 REL 5 5 3 BRSET6 BSET6 BMC 3 DIR 2 DIR 2 REL 5 5 3 BRCLR6 BCLR6 BMS 3 DIR 2 DIR 2 REL 5 5 3 BRSET7 BSET7 BIL 3 DIR 2 DIR 2 REL 5 5 3 BRCLR7 BCLR7 BIH 3 DIR 2 DIR 2 REL
5 3 3 6 5 NEG NEGA NEGX NEG NEG 2 DIR 1 INH 1 INH 2 IX1 1 IX 1
0 1 2 3 4 5 6 7 8 9 A B C D E F
2 2 2 2 2 2
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
11 MUL INH 5 3 3 6 5 10 COM COMA COMX COM COM SWI 2 DIR 1 INH 1 INH 2 IX1 1 IX 1 INH 5 3 3 6 5 LSR LSRA LSRX LSR LSR 2 DIR 1 INH 1 INH 2 IX1 1 IX 1
5 3 3 ROR RORA RORX DIR 1 INH 1 INH 5 3 3 ASR ASRA ASRX 2 DIR 1 INH 1 INH 5 3 3 ASL/LSL ASLA/LSLA ASLX/LSLX 2 DIR 1 INH 1 INH 5 3 3 ROL ROLA ROLX 2 DIR 1 INH 1 INH 5 3 3 DEC DECA DECX 2 DIR 1 INH 1 INH 2
6 ROR IX1 6 ASR 2 IX1 6 ASL/LSL 2 IX1 6 ROL 2 IX1 6 DEC 2 IX1 2
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 2 SEC INH 2 2 CLI INH 2 2 SEI INH 2 2 RSP INH 2 NOP INH 2
5 3 3 6 5 INC INCA INCX INC INC 2 DIR 1 INH 1 INH 2 IX1 1 IX 4 3 3 5 4 TST TSTA TSTX TST TST 2 DIR 1 INH 1 INH 2 IX1 1 IX 1
1 1
2 STOP INH 5 3 3 6 5 2 2 CLR CLRA CLRX CLR CLR WAIT TXA 2 DIR 1 INH 1 INH 2 IX1 1 IX 1 INH 1 INH
6 BSR REL 2 2 LDX 2 IMM 2 2 MSB LSB
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
Instruction Set Opcode Map
LSB of Opcode in Hexadecimal
0
5 Number of Cycles BRSET0 Opcode Mnemonic 3 DIR Number of Bytes/Addressing Mode
Instruction Set
Technical Data 84 Instruction Set
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 12. Electrical Specifications
12.1 Contents
12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 5.0-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . . . 88 3.3-Volt DC Electrical Characteristics. . . . . . . . . . . . . . . . . . . . 89 5.0-Volt SIOP Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 3.3-Volt SIOP Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
12.10 5.0-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 12.11 3.3-Volt Control Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
12.2 Introduction
This section contains electrical and timing specifications.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Electrical Specifications
Technical Data 85
Electrical Specifications 12.3 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 Supply voltage Input voltage Symbol VDD VIn VIn I Tstg Value -0.3 to + 7.0 VSS -0.3 to VDD + 0.3 VSS -0.3 to 2 x VDD +0.3 25 -65 to + 150 Unit V V
Self-check mode (IRQ pin only) Current drain per pin excluding VDD and VSS Storage temperature range
V
mA
C
NOTE:
This device is not guaranteed to operate properly at the maximum ratings. Refer to 12.6 5.0-Volt DC Electrical Characteristics and 12.7 3.3-Volt DC Electrical Characteristics for guaranteed operating conditions.
Technical Data 86 Electrical Specifications
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Electrical Specifications Operating Range
12.4 Operating Range
Characteristic Operating temperature range MC68HC05P4AP (standard) MC68HC05P4ACP (extended) Symbol TA Value TL to TH 0 to +70 -40 to +85 Unit
C
12.5 Thermal Characteristics
Characteristic Thermal resistance Plastic DIP Plastic SOIC Symbol Value 60 71 Unit
JA
C/W
MC68HC05P4A -- Rev. 7.0 MOTOROLA Electrical Specifications
Technical Data 87
Electrical Specifications 12.6 5.0-Volt DC Electrical Characteristics
Characteristic Output voltage ILoad = 10.0 A ILoad = -10.0 A Output high voltage (ILoad = -0.8 mA) PA0-PA7, PB5-PB7, PC2-PC7, PD5 (ILoad = -5.0 mA) PC0-PC1 Output low voltage (ILOAD = 1.6 mA) PA0-PA7, PB5-PB7, PC2-PC7, PD5 (ILOAD = 15 mA) PC0-PC1 Input high voltage PA0-PA7, PB5-PB7, PC0-PC7, PD5, TCAP/PD7, IRQ, RESET, OSC1 Input low voltage PA0-PA7, PB5-PB7, PC0-PC7, PD5, TCAP/PD7, IRQ, RESET, OSC1 Supply current Run Wait/Halt Stop 25 C 0 C to +70 C -40 C to +105 C I/O oorts Hi-Z leakage current PA0-PA7, PB5-PB7, PC0-PC7, PD5 Input current RESET, IRQ, OSC1, TCAP/PD7 Capacitance Ports (as Input or Output) RESET, IRQ Symbol VOL VOH Min -- VDD -0.1 Typ -- -- Max 0.1 -- Unit V
VOH VOH
VDD-0.8 VDD-0.8
-- --
-- --
V
VOL VOL VIH
-- -- 0.7 x VDD
-- -- --
0.4 0.4 VDD
V
V
VIL
VSS
--
0.2 x VDD
V
IDD IDD IDD IDD IOZ IIn
-- -- -- -- -- -- --
3.5 1.5 5.0 8.0 20 -- --
5.0 3.0 8.0 15 30
mA mA
A A A A A
10
1
COut CIn
-- --
-- --
12 8
pF
Notes: 1.VDD = 5.0 Vdc 10%, VSS = 0 Vdc, TA = -40 C to +85 C, unless otherwise noted 2.All values shown reflect average measurements. 3.Typical values at midpoint of voltage range, 25 C 4.Wait IDD: Only timer system active 5.Run (operating) IDD, wait IDD: 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 6.Wait, stop IDD: All ports configured as inputs, VIL = 0.2 V, VIH = VDD -0.2 V 7.Wait IDD is affected linearly by the OSC2 capacitance.
Technical Data 88 Electrical Specifications
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Electrical Specifications 3.3-Volt DC Electrical Characteristics
12.7 3.3-Volt DC Electrical Characteristics
Characteristic Output voltage ILoad = 10.0 A ILoad = -10.0 A Output high voltage (ILoad = -0.2 mA) PA0-PA7, PB5-PB7, PC2-PC7, PD5, TCMP (ILoad = -1.5 mA) PC0-PC1 Output low voltage (ILoad = 0.4 mA) PA0-PA7, PB5-PB7, PC2-PC7, PD5, TCMP (ILoad = 6.0 mA) PC0-PC1 Input high voltage PA0-PA7, PB5-PB7, PC0-PC7, PD5, TCAP/PD7, IRQ, RESET, OSC1 Input low voltage PA0-PA7, PB5-PB7, PC0-PC7, PD5, TCAP/PD7, IRQ, RESET, OSC1 Supply current Run Wait/Halt Stop 25 C 0 C to +70 C -40 C to +105 C I/O ports Hi-Z leakage current PA0-PA7, PB5-PB7, PC0-PC7, PD5 Input current RESET, IRQ, OSC1, TCAP/PD7 Capacitance Ports (as Input or Output) RESET, IRQ Symbol VOL VOH VOH VOH VOL VOL VIH Min -- VDD-0.1 VDD-0.3 VDD-0.3 -- -- 0.7 x VDD Typ -- -- -- -- -- -- -- Max 0.1 -- -- -- 0.3 0.3 VDD V Unit V
V
V
VIL
VSS
--
0.2 x VDD
V
IDD IDD IDD IDD IOZ IIn
-- -- -- -- -- -- --
1.2 0.5 2.0 4.0 10 -- --
2.5 1.4 4.0 8.0 15
mA mA
A A A A A
10
1
COut CIn
-- --
-- --
12 8
pF
Notes: 1.VDD = 3.3 Vdc 10%, VSS = 0 Vdc, TA = -40 C to +85 C, unless otherwise noted 2.All values shown reflect average measurements. 3.Typical values at midpoint of voltage range, 25 C 4.Wait IDD: Only timer system active 5.Run (operating) IDD, wait IDD: 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 6.Wait, stop IDD: All ports configured as inputs, VIL = 0.2 V, VIH = VDD -0.2 V 7.Wait IDD is affected linearly by the OSC2 capacitance.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Electrical Specifications
Technical Data 89
Electrical Specifications 12.8 5.0-Volt SIOP Timing
Num. Characteristic6 Operating frequency Master Slave 1 2 3 4 5 6 Cycle time Master Slave Clock (SCK) low time SDO data valid time SDO hold time SDI setup time SDI hold time Symbol fop(m) fop(s) tcyc(m) tcyc(s) tcyc tv tho ts th Min 0.25 dc 4.0 -- 932 -- 0 100 100 Max 0.25 0.25 4.0 4.0 -- 200 -- -- -- Unit fop
tcyc ns ns ns ns ns
Notes: 1. VDD = 5.0 Vdc 10%, VSS = 0 Vdc, TA = -40 C to +85 C, unless otherwise noted 2. fop = 2.1 MHz maximum
12.9 3.3-Volt SIOP Timing
Num. Characteristic Operating frequency Master Slave 1 2 3 4 5 6 Cycle time Master Slave Clock (SCK) low time SDO data valid time SDO hold time SDI setup time SDI hold time Symbol fop(m) fop(s) tcyc(m) tcyc(s) tcyc tv tho ts th Min 0.25 dc 4.0 -- 1980 -- 0 200 200 Max 0.25 0.25 4.0 4.0 -- 400 -- -- -- Unit fop
tcyc ns ns ns ns ns
Notes: 1. VDD = 3.3 Vdc 10%, VSS = 0 Vdc, TA = -40 C to +85 C, unless otherwise noted 2. fop = 1.0 MHz maximum
Technical Data 90 Electrical Specifications
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Electrical Specifications 5.0-Volt Control Timing
1 2
SCK
SDO
3
BIT 0
BIT 1 4
BIT 6
BIT 7 6
SDI
BIT 0
BIT 1
BIT 6 5
BIT 7
Figure 12-1. SIOP Timing Diagram
12.10 5.0-Volt Control Timing
Characteristic Frequency of operation Crystal option External clock option Internal operating frequency Crystal (fosc / 2) External Clock (fosc / 2) Cycle time Crystal oscillator startup time Stop recovery startup time (crystal oscillator) RESET pulse width Interrupt pulse width low (edge-triggered) Interrupt pulse period OSC1 pulse width Symbol fosc Min -- dc -- dc 480 -- -- 1.5 125 * 90 Max 4.2 4.2 2.1 2.1 -- 100 100 -- -- -- -- Unit MHz
fop tcyc tOXOV tILCH tRL tILIH tILIL tOH, tOL
MHz ns ms ms tcyc ns tcyc ns
Note: 1. VDD = 5.0 Vdc 10%, VSS = 0 Vdc, TA = -40 C to +85 C, unless otherwise noted *The minimum period t should not be less than the number of cycles it takes to execute the interrupt service routine plus 19 t . ILIL cyc
MC68HC05P4A -- Rev. 7.0 MOTOROLA Electrical Specifications
Technical Data 91
Electrical Specifications 12.11 3.3-Volt Control Timing
Characteristic Frequency of operation Crystal Option External Clock Option Internal operating frequency Crystal (fosc / 2) External clock (fosc / 2) Cycle time Crystal oscillator startup time Stop recovery startup time (crystal oscillator) RESET pulse width, excluding powerup Interrupt pulse width low (edge-triggered) Interrupt pulse period OSC1 pulse width Symbol fosc Min -- dc -- dc 1000 -- -- 1.5 250 * 200 Max 2.0 2.0 1.0 1.0 -- 100 100 -- -- -- -- Unit MHz
fop tcyc tOXOV tILCH tRL tILIH tILIL tOH, tOL
MHz ns ms ms tcyc ns tcyc ns
Notes: 1. VDD = 3.3 Vdc 10%, VSS = 0 Vdc, TA = -40C to +85C, unless otherwise noted *The minimum period t should not be less than the number of cycles it takes to execute the interrupt service routine plus 19 t . ILIL cyc
Technical Data 92 Electrical Specifications
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Electrical Specifications 3.3-Volt Control Timing
OSC 1
t RL
RESET
IRQ 2
t ILIH
4064 t cyc
IRQ 3
INTERNAL CLOCK INTERNAL ADDRESS BUS
1FFE
1FFE
1FFE
1FFE
1FFE
1FFF 4
Notes: 1. Represents the internal clocking of the OSC1 pin. 2. IRQ pin edge-sensitive mask option 3. IRQ pin level- and edge-sensitive mask option 4. RESET vector address shown for timing example
RESET OR INTERRUPT VECTOR FETCH
Figure 12-2. STOP Recovery Timing
IRQ (PIN)
t ILIH t ILIL
Edge-Sensitive Trigger Condition The minimum pulse width (tILIH) is either 125 ns (VDD = 5 V) or 250 ns (VDD = 3 V). The period tILIL should not be less than the number of tcyc cycles it takes to execute the interrupt service routine plus 19 tcyc cycles. Level-Sensitive Trigger Condition If after servicing an interrupt the IRQ remains low, then the next interrupt is recognized.
IRQ1 * * * IRQn
t ILIH
NORMALLY USED WITH WIRE-ORed CONNECTION
RQ (MCU)
Figure 12-3. External Interrupt Timing
MC68HC05P4A -- Rev. 7.0 MOTOROLA Electrical Specifications Technical Data 93
Electrical Specifications
t VDDR
VDD VDD THRESHOLD (TYPICALLY 1-2 V)
SC1 PIN
4064 t cyc
INTERNAL CLOCK INTERNAL ADDRESS BUS INTERNAL DATA BUS Notes: 1. Internal clock, internal address bus, and internal data bus signals are not available externally. 2. An internal POR reset is triggered as VDD rises through a threshold (typically 1-2 V).
1FFE
1FFE
1FFE
1FFE
1FFE
1FFE
1FFF
NEW PCH
NEW PCL
Figure 12-4. Power-On Reset Timing
NTERNAL CLOCK NTERNAL DDRESS BUS NTERNAL DATA BUS
1FFE
1FFE
1FFE
1FFE
1FFF
NEW PC
NEW PC
NEW PCH
NEW PCL
DUMMY
OP CODE
t RL
RESET Notes: 1. Internal clock, internal address bus, and internal data bus signals are not available externally. 2. The next rising edge of the internal processor clock after the rising edge of RESET initiates the reset sequence.
Figure 12-5. External Reset Timing
Technical Data 94 Electrical Specifications
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 13. Mechanical Specifications
13.1 Contents
13.2 13.3 13.4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 28-Pin Plastic Dual In-Line Package (Case 710-02) . . . . . . . . 95 28-Pin Small Outline Integrated Circuit Package (Case 751F-04). . . . . . . . . . . . . . . . . . . . . . . . . . . 96
13.2 Introduction
This section describes the dimensions of the dual in-line package (DIP) and small outline integrated circuit (SOIC) MCU package.
13.3 28-Pin Plastic Dual In-Line Package (Case 710-02)
28
15
B
1 14
NOTES: 1. POSITIONAL TOLERANCE OF LEADS (D), SHALL BE WITHIN 0.25mm (0.010) AT MAXIMUM MATERIAL CONDITION, IN RELATION TO SEATING PLANE AND EACH OTHER. 2. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 3. DIMENSION B DOES NOT INCLUDE MOLD FLASH. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 36.45 37.21 13.72 14.22 5.08 3.94 0.56 0.36 1.52 1.02 2.54 BSC 2.16 1.65 0.38 0.20 3.43 2.92 15.24 BSC 15 0 1.02 0.51 INCHES MIN MAX 1.435 1.465 0.540 0.560 0.155 0.200 0.014 0.022 0.040 0.060 0.100 BSC 0.065 0.085 0.008 0.015 0.115 0.135 0.600 BSC 15 0 0.020 0.040
A N
C
L
H
G F D
K
SEATING PLANE
M
J
MC68HC05P4A -- Rev. 7.0 MOTOROLA Mechanical Specifications
Technical Data 95
Mechanical Specifications 13.4 28-Pin Small Outline Integrated Circuit Package (Case 751F-04)
-A28 15 14X
-B1 14
P 0.010 (0.25)
M
B
M
28X D
0.010 (0.25)
M
T
A
S
B
S
M R X 45
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (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 17.80 18.05 7.60 7.40 2.65 2.35 0.49 0.35 0.90 0.41 1.27 BSC 0.32 0.23 0.29 0.13 8 0 10.05 10.55 0.75 0.25 INCHES MIN MAX 0.701 0.711 0.292 0.299 0.093 0.104 0.014 0.019 0.016 0.035 0.050 BSC 0.009 0.013 0.005 0.011 8 0 0.395 0.415 0.010 0.029
-T26X
C G K -TSEATING PLANE
F J
Technical Data 96 Mechanical Specifications
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Technical Data -- MC68HC05P4A
Section 14. Ordering Information
14.1 Contents
14.2 14.3 14.4 14.5 14.6 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 MCU Ordering Forms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Application Program Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 ROM Program Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 ROM Verification Units (RVUs). . . . . . . . . . . . . . . . . . . . . . . . 100
14.2 Introduction
This section contains instructions for ordering custom-masked ROM MCUs.
14.3 MCU Ordering Forms
To initiate an order for a ROM-based MCU, first obtain the current ordering form for the MCU from a Motorola representative. Submit the following items when ordering MCUs: * * * A current MCU ordering form that is completely filled out (Contact your Motorola sales office for assistance.) A copy of the customer specification if the customer specification deviates from the Motorola specification for the MCU Customer's application program on one of the media listed in 14.4 Application Program Media
MC68HC05P4A -- Rev. 7.0 MOTOROLA Ordering Information
Technical Data 97
Ordering Information 14.4 Application Program Media
Deliver the application program to Motorola in one of the following media: * * * Macintosh(1) 3 1/2-inch diskette (double-sided 800 K or double-sided high-density 1.4 M) MS-DOS(2) or PC-DOSTM(3) 3 1/2-inch diskette (double-sided 720 K or double-sided high-density 1.44 M) MS-DOS or PC-DOSTM 5 1/4-inch diskette (double-sided doubledensity 360 K or double-sided high-density 1.2 M)
Use positive logic for data and addresses. When submitting the application program on a diskette, clearly label the diskette with the following information: * * * * * * * Customer name Customer part number Project or product name File name of object code Date Name of operating system that formatted diskette Formatted capacity of diskette
On diskettes, the application program must be in Motorola's S-record format (S1 and S9 records), a character-based object file format generated by M6805 cross assemblers and linkers.
NOTE:
Begin the application program at the first user ROM location. Program addresses must correspond exactly to the available on-chip user ROM addresses as shown in the memory map. Write $00 in all non-user ROM locations or leave all non-user ROM locations blank. Refer to the current
1. Macintosh is a registered trademark of Apple Computer, Inc. 2. MS-DOS is a registered trademark of Microsoft Corporation. 3. PC-DOS is a trademark of International Business Machines Corporation.
Technical Data 98 Ordering Information
MC68HC05P4A -- Rev. 7.0 MOTOROLA
Ordering Information ROM Program Verification
MCU ordering form for additional requirements. Motorola may request pattern re-submission if non-user areas contain any non-zero code. If the memory map has two user ROM areas with the same address, then write the two areas in separate files on the diskette. Label the diskette with both file names. In addition to the object code, a file containing the source code can be included. Motorola keeps this code private and uses it only to expedite ROM pattern generation in case of any difficulty with the object code. Label the diskette with the file name of the source code.
14.5 ROM Program Verification
The primary use for the on-chip ROM is to hold the customer's application program. The customer develops and debugs the application program and then submits the MCU order along with the application program. Motorola inputs the customer's application program code into a computer program that generates a listing verify file. The listing verify file represents the memory map of the MCU. The listing verify file contains the user ROM code and may also contain non-user ROM code, such as self-check code. Motorola sends the customer a computer printout of the listing verify file along with a listing verify form. To aid the customer in checking the listing verify file, Motorola will program the listing verify file into customer-supplied blank preformatted Macintosh or DOS disks. All original pattern media are filed for contractual purposes and are not returned. Check the listing verify file thoroughly, then complete and sign the listing verify form, and return the listing verify form to Motorola. The signed listing verify form constitutes the contractual agreement for the creation of the custom mask.
MC68HC05P4A -- Rev. 7.0 MOTOROLA Ordering Information
Technical Data 99
Ordering Information 14.6 ROM Verification Units (RVUs)
After receiving the signed listing verify form, Motorola manufactures a custom photographic mask. The mask contains the customer's application program and is used to process silicon wafers. The application program cannot be changed after the manufacture of the mask begins. Motorola then produces 10 MCUs, called RVUs, and sends the RVUs to the customer. RVUs are usually packaged in unmarked ceramic and tested to 5 Vdc at room temperature. RVUs are not tested to environmental extremes because their sole purpose is to demonstrate that the customer's user ROM pattern was properly implemented. The 10 RVUs are free of charge with the minimum order quantity. These units are not to be used for qualification or production. RVUs are not guaranteed by Motorola Quality Assurance.
Technical Data 100 Ordering Information
MC68HC05P4A -- Rev. 7.0 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
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