SH7203 Datasheet, PDF (863/1686 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 17 I²C Bus Interface 3 (IIC3)
Initial
Bit
Bit Name Value R/W Description
5
SDAO
1
R/W SDA Output Value Control
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.
When writing, SDA pin is changed to output low.
1: When reading, SDA pin outputs high.
When writing, SDA pin is changed to output Hi-Z
(outputs high by external pull-up resistance).
4
SDAOP
1
R/W SDAO Write Protect
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. This bit is always read as 1.
3
SCLO
1
R SCL Output Level
Monitors SCL output level. When SCLO is 1, SCL pin
outputs high. When SCLO is 0, SCL pin outputs low.
2
⎯
1
R Reserved
This bit is always read as 1. The write value should
always be 1.
1
IICRST
0
R/W IIC Control Part Reset
Resets bits BC2 to BC0 in the ICMR register and the
IIC3 internal circuits. If this bit is set to 1 when hang-up
occurs because of communication failure during I²C bus
operation, bits BC2 to BC0 in the ICMR register and the
IIC3 internal circuits can be reset by setting this bit to 1.
0
⎯
1
R Reserved
This bit is always read as 1. The write value should
always be 1.
Rev. 2.00 Apr. 16, 2008 Page 833 of 1652
REJ09B0313-0200