HD64F2149 Datasheet, PDF (928/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

ICSR1—I²C Bus Status Register 1
ICSR0—I²C Bus Status Register 0
H'FF89
H'FFD9
IIC1
IIC0
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
ESTP STOP IRTR AASX AL
AAS ADZ
0
0
0
0
0
0
0
R/(W)*¹ R/(W)*¹ R/(W)*¹ R/(W)*¹ R/(W)*¹ R/(W)*¹ R/(W)*¹
0
ACKB
0
R/W
Acknowledge bit
0 Receive mode: 0 is output at
acknowledge output timing
Transmit mode: indicates that
the receiving device has
acknowledged the data (signal is 0)
1 Receive mode: 1 is output at
acknowledge output timing
Transmit mode: indicates that
the receiving device has not
acknowledged the data (signal is 1)
General call address recognition flag*²
0 General call address not recognized
1 General call address recognized
Slave address recognition flag*²
0 Slave address or general call address
not recognized
1 Slave address or general call address
recognized
Arbitration lost*²
0 Bus arbitration won
1 Arbitration lost
Second slave address recognition flag*²
0 Second slave address not recognized
1 Second slave address recognized
I²C bus interface continuous transmission/reception interrupt request flag*²
0 Waiting for transfer, or transfer in progress
1 Continuous transfer state
Normal stop condition detection flag*²
0 No normal stop condition
1 In I²C bus format slave mode: Normal stop condition detected
In other modes: No meaning
Error stop condition detection flag*²
0 No error stop condition
1 In I²C bus format slave mode: Error stop condition detected
In other modes: No meaning
Notes: 1. Only 0 can be written, to clear the flag.
2. For the clearing and setting conditions, see section 16.2.6, I²C Bus Status Register (ICSR).
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