SH7261 datasheet(769/1348 Pages) RENESAS

769 / 1348 page

Section 17 I

2C Bus Interface 3 (IIC3)

Rev. 2.00 Sep. 07, 2007 Page 737 of 1312

REJ09B0320-0200

Bit

Bit Name

Initial

Value

R/W

Description

SDAO

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).

SDAOP

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.

SCLO

SCL Output Level

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. The write value should

always be 1.

IICRST

R/W

IIC Control Part Reset

Resets the control part except for I

2C registers. If this bit

is set to 1 when hang-up occurs because of

communication failure during I

2C bus operation, some

IIC3 registers and the control part can be reset.



Reserved

This bit is always read as 1. The write value should

always be 1.

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