38
CHAPTER 3 CPU
Figure 3.2-8 "Stack Operation Instructions and Stack Pointers" shows an example of the stack operation
using the system stack.
Figure 3.2-8 Stack Operation Instructions and Stack Pointers
■
System stack pointer (SSP)
When using the system stack pointer (SSP), the stack flag (CCR: S) is set to "1". The higher 8 bits of the
address used in processing the stack are set by the system stack bank register (SSB).
■
User stack pointer (USP)
When using the user stack pointer (USP), the stack flag (CCR: S) is set to"0". The higher 8 bits of the
address used in processing the stack are set by the user stack bank register (USB).
PUSHW A when S flag is "0"
PUSHW A when S flag is "1"
AL
0
USB
USP
S flag
SSB
SSP
XX
H
XX
H
C6
H
F328
H
A624
H
56
H
1234
H
MSB
LSB
AL
0
USB
USP
S flag
SSB
SSP
A6
H
C6
H
F326
H
A624
H
56
H
1234
H
24
H
Because S flug = "0",
use the user stack pointer.
AL
1
USB
USP
S flag
SSB
SSP
XX
H
XX
H
C6
H
F328
H
A624
H
56
H
1234
H
MSB
LSB
AL
1
USB
USP
S flag
SSB
SSP
A6
H
C6
H
F328
H
A624
H
56
H
1232
H
24
H
Because S flug = "1",
use the system stack pointer.
C6F327
H
C6F326
H
C6F327
H
C6F326
H
561233
H
561232
H
561233
H
561232
H
X: Undefined
MSB: Most significant bit
LSB: Least significant bit
Before
execution
After
execution
Before
execution
After
execution
Notes:
•
Use even addresses for setting value to the stack pointer. Setting an odd address divides
the word access into two accesses, decreasing the efficiency.
•
The reset values of the USP and SSP registers are undefined.
Содержание F2MC-16LX Series
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Страница 3: ...FUJITSU LIMITED F2MC 16LX 16 bit Microcontroller MB90895 series Hardware Manual ...
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Страница 8: ...iv ...
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Страница 36: ...18 CHAPTER 2 HANDLING DEVICES ...
Страница 176: ...158 CHAPTER 3 CPU ...
Страница 224: ...206 CHAPTER 5 Timebase timer ...
Страница 294: ...276 CHAPTER 8 16 bit reload timer ...
Страница 366: ...348 CHAPTER 12 DTP external interrupt ...
Страница 398: ...380 CHAPTER 13 8 10 bit A D converter ...
Страница 446: ...428 CHAPTER 14 UART0 ...
Страница 588: ...570 CHAPTER 17 Address Match Detecting Function ...
Страница 626: ...608 CHAPTER 19 512 KBIT FLASH MEMORY ...
Страница 676: ...658 APPENDIX Table A 9 3 Bit Operation Instruction Map first byte 6CH ...
Страница 677: ...659 APPENDIX A Instructions Table A 9 4 Character String Operation Instruction Map first byte 6EH ...
Страница 678: ...660 APPENDIX Table A 9 5 2 byte Instruction Map first byte 6FH MUL MULW DIVU A A A ...
Страница 680: ...662 APPENDIX Table A 9 7 ea Instruction 2 first byte 71H ...
Страница 681: ...663 APPENDIX A Instructions Table A 9 8 ea Instruction 3 first byte 72H ...
Страница 682: ...664 APPENDIX Table A 9 9 ea Instruction 4 first byte 73H ...
Страница 683: ...665 APPENDIX A Instructions Table A 9 10 ea Instruction 5 first byte 74H ...
Страница 684: ...666 APPENDIX Table A 9 11 ea Instruction 6 first byte 75H ...
Страница 685: ...667 APPENDIX A Instructions Table A 9 12 ea Instruction 7 first byte 76H ...
Страница 686: ...668 APPENDIX Table A 9 13 ea Instruction 8 first byte 77H ...
Страница 687: ...669 APPENDIX A Instructions Table A 9 14 ea Instruction 9 first byte 78H ...
Страница 688: ...670 APPENDIX Table A 9 15 MOVEA RWi ea Instruction first byte 79H ...
Страница 689: ...671 APPENDIX A Instructions Table A 9 16 MOV Ri ea Instruction first byte 7AH ...
Страница 690: ...672 APPENDIX Table A 9 17 MOVW RWi ea Instruction first byte 7BH ...
Страница 691: ...673 APPENDIX A Instructions Table A 9 18 MOV ea Ri Instruction first byte 7CH ...
Страница 692: ...674 APPENDIX Table A 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Страница 693: ...675 APPENDIX A Instructions Table A 9 20 XCH Ri ea Instruction first byte 7EH ...
Страница 694: ...676 APPENDIX Table A 9 21 XCHW RWi ea Instruction first byte 7FH ...
Страница 710: ......