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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
R/W
Start/Stop Condition Prohibit
Controls the issue of start/stop conditions in master mode.
To issue a start condition, write 1 to BBSY and 0 to SCP.
Also follow this procedure when retransmitting a start
condition. To issue a stop condition, write 0 to BBSY and 0
to SCP. This bit is always read as 1. Even if 1 is written to
this bit, the data is not stored.
R
Monitors the SDA output level. When reading and the
SDAO bit is 1, the SDA pin outputs high. When reading
and the SDAO bit is 0, the SDA pin outputs low.
R/W
Reserved
The write value should always be 1.
R
Monitors the SCL output level. When reading and the
SCLO bit is 1, the SCL pin outputs high. When reading and
the SCLO bit is 0, the SCL pin outputs low.
Reserved
This bit is always read as 1.
R/W
IIC Control Part Reset
Resets control parts except for I
to 1 when a hang-up occurred because of communication
failure during I
without setting ports and initializing registers.
Reserved
This bit is always read as 1.
2
C registers. If this bit is set
2
2
C operation, I
C control parts can be reset
Rev. 1.00, 09/03, page 481 of 704
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