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Bit Bit Name
Initial Value R/W
6
SCP
1
5
SDAO
1
4
1
3
SCLO
1
2
1
1
IICRST
0
0
1
Description
W
Start Condition/Stop Condition Prohibit
The SCP bit controls the issue of start/stop conditions in
master mode.
To issue a start condition, write 1 in BBSY and 0 in SCP. A
retransmit start condition is issued in the same way. To
issue a stop condition, write 0 in BBSY and 0 in SCP. This
bit is always read as 1. If 1 is written, the data is not stored.
R/W
Monitors the output level of SDA.
0: When reading, SDA pin outputs low.
1: When reading, SDA pin outputs high.
The write value should always be 1.
R/W
Reserved
The write value should always be 1.
R
This bit monitors SCL output level. When reading and
SCLO is 1, SCL pin outputs high. When reading and SCLO
is 0, SCL pin outputs low.
Reserved
This bit is always read as 1.
R/W
IIC control part reset
This bit resets control parts except for I
bit is set to 1 when hang-up is occurred because of
communication failure during I
can be reset without setting ports and initializing registers.
Reserved
This bit is always read as 1.
2
C registers. If this
2
2
C operation, I
C control part
Rev. 2.00, 05/03, page 595 of 820
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