48
CHAPTER 2 CPU
2.9
Prefix Codes
Placing a prefix code before an instruction partially changes the operation of the
instruction. Three types of prefix codes can be used: bank select prefix, common
register bank prefix, and flag change disable prefix.
■
Bank Select Prefix
The memory space used for accessing data is determined for each addressing mode.
When a bank select prefix is placed before an instruction, the memory space used for accessing data by that
instruction can be selected regardless of the addressing mode.
Table 2.9-1 lists the bank select prefixes and the corresponding memory spaces.
Use the following instructions with care:
●
String instructions (MOVS, MOVSW, SCEQ, SCWEQ, FILS, FILSW)
The bank register specified by an operand is used regardless of the prefix.
●
Stack manipulation instructions (PUSHW, POPW)
SSB or USB is used according to the S flag regardless of the prefix.
●
I/O access instructions
MOVA,io/MOVio,A/MOVXA,io/MOVWA,io/MOVWio,A/MOVio,#imm8
MOVWio,#imm16/MOVBA,io:bp/MOVBio:bp,A/SETBio:bp/CLRBio:bp
BBCio:bp,rel/BBSio:bp,rel/WBTC,WBTS
The IO space of the bank is used regardless of the prefix.
●
Flag change instructions (AND CCR,#imm8, OR CCR,#imm8)
The instruction is executed normally, but the prefix affects the next instruction.
●
POPW PS
SSB or USB is used according to the S flag regardless of the prefix. The prefix affects the next instruction.
Table 2.9-1 Bank Select Prefix
Bank select prefix
Selected space
PCB
PC space
DTB
Data space
ADB
AD space
SPB
Either the SSP or USP space is used according to the stack flag value.
Summary of Contents for F2MCTM-16LX
Page 2: ......
Page 3: ...FUJITSU LIMITED F2MCTM 16LX 16 BIT MICROCONTROLLER MB90360 Series HARDWARE MANUAL ...
Page 4: ......
Page 42: ...26 CHAPTER 1 OVERVIEW ...
Page 70: ...54 CHAPTER 2 CPU ...
Page 134: ...118 CHAPTER 6 CLOCK SUPERVISOR ...
Page 176: ...160 CHAPTER 8 LOW POWER CONSUMPTION MODE ...
Page 194: ...178 CHAPTER 10 I O PORTS ...
Page 252: ...236 CHAPTER 13 16 Bit I O TIMER ...
Page 282: ...266 CHAPTER 14 16 BIT RELOAD TIMER ...
Page 296: ...280 CHAPTER 15 WATCH TIMER ...
Page 386: ...370 CHAPTER 18 8 10 BIT A D CONVERTER ...
Page 426: ...410 CHAPTER 20 LIN UART Figure 20 5 2 ORE Flag Set Timing RDRF ORE Reception data ...
Page 540: ...524 CHAPTER 22 ADDRESS MATCH DETECTION FUNCTION ...
Page 568: ...552 CHAPTER 24 512K BIT FLASH MEMORY ...
Page 633: ...617 APPENDIX B Instructions Table B 9 3 Bit Operation Instruction Map first byte 6CH ...
Page 634: ...618 APPENDIX Table B 9 4 Character String Operation Instruction Map first byte 6EH ...
Page 637: ...621 APPENDIX B Instructions Table B 9 7 ea Instruction 2 first byte 71H ...
Page 638: ...622 APPENDIX Table B 9 8 ea Instruction 3 first byte 72H ...
Page 639: ...623 APPENDIX B Instructions Table B 9 9 ea Instruction 4 first byte 73H ...
Page 640: ...624 APPENDIX Table B 9 10 ea Instruction 5 first byte 74H ...
Page 641: ...625 APPENDIX B Instructions Table B 9 11 ea Instruction 6 first byte 75H ...
Page 642: ...626 APPENDIX Table B 9 12 ea Instruction 7 first byte 76H ...
Page 643: ...627 APPENDIX B Instructions Table B 9 13 ea Instruction 8 first byte 77H ...
Page 644: ...628 APPENDIX Table B 9 14 ea Instruction 9 first byte 78H ...
Page 645: ...629 APPENDIX B Instructions Table B 9 15 MOVEA RWi ea Instruction first byte 79H ...
Page 646: ...630 APPENDIX Table B 9 16 MOV Ri ea Instruction first byte 7AH ...
Page 647: ...631 APPENDIX B Instructions Table B 9 17 MOVW RWi ea Instruction first byte 7BH ...
Page 648: ...632 APPENDIX Table B 9 18 MOV Ri ea Instruction first byte 7CH ...
Page 649: ...633 APPENDIX B Instructions Table B 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Page 650: ...634 APPENDIX Table B 9 20 XCH Ri ea Instruction first byte 7EH ...
Page 651: ...635 APPENDIX B Instructions Table B 9 21 XCHW RWi ea Instruction first byte 7FH ...
Page 664: ...648 APPENDIX ...
Page 665: ...649 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 682: ......