HD64336901G Renesas Technology, HD64336901G Datasheet - Page 258

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

Rev. 1.00, 11/03, page 230 of 376
Bit Bit Name
6
5
4
3
2
1
0
SCP
SDAO
SDAOP
SCLO
IICRST
Initial Value R/W Description
1
1
1
1
1
0
1
R/W Start/Stop Issue Condition Disable
R/W SDA Output Value Control
R
R/W IIC Control Part Reset
R/W SDAO Write Protect
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.
This bit is used with SDAOP when modifying output level of
SDA. This bit should not be manipulated during transfer.
0: When reading, SDA pin outputs low.
1: When reading, SDA pin outputs high.
This bit controls change of output level of the SDA pin by
modifying the SDAO bit. To change the output level, clear
SDAO and SDAOP to 0 or set SDAO to 1 and clear SDAOP
to 0 by the MOV instruction. This bit is always read as 1.
This bit monitors SCL output level. When SCLO is 1, SCL pin
outputs high. When SCLO is 0, SCL pin outputs low.
Reserved
This bit is always read as 1.
This bit resets the control part except for I
bit is set to 1 when hang-up occurs because of
communication failure during I
can be reset without setting ports and initializing registers.
Reserved
This bit is always read as 1.
When writing, SDA pin is changed to output low.
When writing, SDA pin is changed to output Hi-Z (outputs
high by external pull-up resistance).
2
C operation, I
2
C registers. If this
2
C control part