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CHAPTER 3 CPU
3.9
Prefix Codes
Prefix codes are placed before an instruction to partially change the operation of the
instruction. The three types of prefix codes are as follows:
• Bank select prefix (PCB, DTB, ADB, SPB)
• Common register bank prefix (CMR)
• Flag change suppression prefix (NCC)
■
Prefix Codes
●
Bank select prefix (PCB, DTB, ADB, SPB)
A bank select prefix is placed before an instruction to select the memory space to be accessed by the
instruction regardless of the addressing method.
●
Common register bank prefix (CMR)
The common register bank prefix is placed before an instruction that accesses a register bank to change the
register accessed by the instruction to the common bank (register bank selected when RP = 0) at 000180
H
to 00018F
H
regardless of the current register bank pointer (RP) value.
●
Flag change suppression prefix (NCC)
The flag change suppression prefix code is placed before an instruction to suppress a flag change
accompanying the execution of the instruction.
Содержание MB90460 Series
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Страница 41: ...22 CHAPTER 1 OVERVIEW ...
Страница 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Страница 83: ...64 CHAPTER 3 CPU ...
Страница 95: ...76 CHAPTER 4 RESET ...
Страница 107: ...88 CHAPTER 5 CLOCK ...
Страница 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Страница 175: ...156 CHAPTER 7 INTERRUPT ...
Страница 181: ...162 CHAPTER 8 MODE SETTING ...
Страница 223: ...204 CHAPTER 9 I O PORT ...
Страница 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Страница 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Страница 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Страница 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Страница 485: ...466 CHAPTER 16 PWC Timer ...
Страница 531: ...512 CHAPTER 17 UART ...
Страница 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Страница 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Страница 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Страница 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Страница 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Страница 715: ...696 APPENDIX ...
Страница 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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