HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 446

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Rev. 2.0, 08/02, page 406 of 788
Bit Bit Name
2
0
BBSY
SCP
Initial Value R/W
0
1
R/W
W
Description
Bus Busy
Start Condition/Stop Condition Prohibit
In master mode:
In slave mode:
[BBSY setting condition]
When the SDA level changes from high to low under the
condition of SCL = high, assuming that the start condition
has been issued.
[BBSY clearing condition]
When the SDA level changes from low to high under the
condition of SCL = high, assuming that the stop condition
has been issued.
To issue a start/stop condition, use the MOV instruction.
The I
before the issue of a start condition. Set MST to 1 and TRS
to 1 before writing 1 in BBSY and 0 in SCP.
The BBSY flag can be read to check whether the I
(SCL, SDA) is busy or free.
The SCP bit is always read as 1. If 0 is written, the data is
not stored.
Writing 0 in BBSY and 0 in SCP: A stop condition is
issued
Writing 1 in BBSY and 0 in SCP: A start condition and a
restart condition are issued
Writing to the BBSY flag is disabled.
2
C bus interface must be set in master transmit mode
2
C bus