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CHAPTER 2 CPU
2.10
Interrupt Disable Instructions
Interrupt requests are not sampled for the following ten instructions:
- MOV ILM,#imm8
- PCB
- SPB
- OR CCR,#imm8
- NCC
- AND CCR,#imm8
- ADB
- CMR
- POPW PS
- DTB
■
Interrupt Disable Instructions
If a valid interrupt request occurs during execution of any of the above instructions, the interrupt can be
processed only when an instruction other than the above is executed. For details, see Figure 2.10-1.
Figure 2.10-1 Interrupt Disable Instruction
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Restrictions on Interrupt Disable Instructions and Prefix Instructions
When a prefix code is placed before an interrupt disable instruction, the prefix code affects the first
instruction after the code other than the interrupt disable instruction. For details, see Figure 2.10-2.
Figure 2.10-2 Interrupt Disable Instructions and Prefix Codes
• • • • • • • • • • •
Interrupt disable instruction
Interrupt
request
Interrupt
acceptance
(a) Ordinary
instruction
(a)
• • • •
MOV A, FFH
B
CCR:XXX10XX
NCC
MOV ILM,#imm8
ADD A,01H
B
CCR:XXX10XX
Interrupt disable instruction
CCR does not change with NCC.
Summary of Contents for MB90390 Series
Page 2: ......
Page 4: ......
Page 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
Page 18: ...xiv ...
Page 132: ...104 CHAPTER 5 CLOCKS ...
Page 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Page 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Page 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Page 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Page 274: ...246 CHAPTER 15 WATCH TIMER ...
Page 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Page 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Page 364: ...336 CHAPTER 19 UART0 UART1 ...
Page 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Page 432: ...404 CHAPTER 20 UART2 UART3 ...
Page 482: ...454 CHAPTER 22 SERIAL I O ...
Page 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Page 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Page 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Page 722: ...694 APPENDIX ...
Page 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
Page 740: ......