74
CHAPTER 3 INTERRUPTS
■
I/O Register Address Pointer (IOA)
This is a 16-bit register that indicates the low-order address (A15 to A00) of the buffer and I/O register
used for data transfer. The high-order address (A23 to A16) are all zeroes, and any I/O between addresses
"000000
H
" and "00FFFF
H
" can be specified. Figure 3.7-4 shows the I/O register address pointer
configuration.
Figure 3.7-4 I/O Register Address Pointer Configuration
■
Buffer Address Pointer (BAP)
This 24-bit register holds the address used for the next EI
2
OS transfer. BAP exists for each EI
2
OS channel.
Therefore, each EI
2
OS channel can be used for transfer with anywhere in the 16-Mbyte space. If the BF bit
of ISCS is set to "0" (update enabled), only the low-order 16 bits of BAP changes and BAPH does not
change.
A15 A14 A13 A12 A11 A10 A09 A08 A07 A06 A05 A04 A03 A02 A01 A00
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
bit
IOA
(Undefined
w
hen reset)
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
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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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