HD64336900G Datasheet, PDF (258/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

Bit Bit Name Initial Value R/W Description
6 SCP
1
R/W Start/Stop Issue Condition Disable
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.
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
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.
3 SCLO
1
R This bit monitors SCL output level. When SCLO is 1, SCL pin
outputs high. When SCLO is 0, SCL pin outputs low.
2
1
 Reserved
This bit is always read as 1.
1 IICRST 0
R/W IIC Control Part Reset
This bit resets the control part except for I²C registers. If this
bit is set to 1 when hang-up occurs because of
communication failure during I²C operation, I²C control part
can be reset without setting ports and initializing registers.
0
1
 Reserved
This bit is always read as 1.
Rev. 1.00, 11/03, page 230 of 376