427
CHAPTER 21 400 kHz I
2
C INTERFACE
21.2.6
I
2
C Data Register (IDAR)
Data Register for the 400 kHz I
2
C Interface.
■
I
2
C Data Register (IDAR)
■
I
2
C Data Register Contents
7
6
5
4
3
2
1
0
Initial value
0 0 0 0 0 0 0 0
B
R/W R/W R/W R/W
R/W
R/W
R/W
R/W
H
0035A8
IDAR
D7 D6 D5 D4 D3 D2
D1 D0
Address:
bit
R/W
:
Readable and
w
ritable
Table 21.2-7 Function of Each Bit of the I
2
C Data Register
Bit name
Function
bit7 to bit0
D7 to D0:
Data bits
The data register is used in serial data transfer, and transfers data MSB first. This
register is double buffered on the write side, so that when the bus is in use (BB = 1),
write data can be loaded to the register for serial transfer. The data byte is loaded
into the internal transfer register if the INT bit in the IBCR register is being
cleared or the bus is idle (BB = 0 in IBSR). In a read access, the internal register is
read directly, therefore received data values in this register are only valid if INT=
1 in the IBCR register.
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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