Fujitsu MB91460 SERIES FR60 User Manual page 697

2.7 Data Register (IDAR0)
Data register
Address : 0000D9
[bit 15] - [bit 8] Not used.
These bits always read '0'.
[bit 7] - [bit 0] Data bits (D7-D0)
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 IBCR0 register is being
cleared or the bus is idle (BB='0' in IBSR0). 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 IBCR2 register.
7
D7
H
Read/write ⇒
(R/W) (R/W) (R/W) (R/W) (R/W) (R/W) (R/W) (R/W)
(0)
Default value⇒
6 5 4 3
D6 D5 D4 D3
(0) (0) (0) (0)
Chapter 33 I2C Controller
2.I2C Interface Registers
⇐ Bit no.
2 1 0
IDAR0
D2 D1 D0
(0) (0) (0)
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