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APPENDIX
●
Abbreviated direct addressing (dir)
Specify the eight low-order bits of a memory address explicitly in an operand. Address bits 8 to 15 are
specified by the direct page register (DPR). Address bits 16 to 23 are specified by the data bank register
(DTB).
Figure B.3-6 Example of Abbreviated Direct Addressing (dir)
●
Direct addressing (addr16)
Specify the 16 low-order bits of a memory address explicitly in an operand. Address bits 16 to 23 are
specified by the data bank register (DTB). A prefix instruction for access space addressing is invalid for
this mode of addressing.
Figure B.3-7 Example of Direct Addressing (addr16)
MOV S : 20H, A (This instruction writes the contents of the eight low-order bits of A in
abbreviated direct addressing mode.)
Before execution
A 4 4 5 5
1 2 1 2
Memory space
DPR 6 6
DTB 7 7
776620
H
? ?
After execution
A 4 4 5 5
1 2 1 2
Memory space
DPR 6 6
DTB 7 7
776620
H
1 2
MOVW A, 3B20H (This instruction reads data by direct addressing and stores it in A.)
Before execution
A
2 0 2 0
A A B B
DTB
5 5
Memory space
553B21
H
0 1
553B20
H
2 3
After execution
A A A B B
0 1 2 3
DTB 5 5
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
Страница 18: ...xiv ...
Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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