h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 480

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 I
Bit Bit Name
2
0
Rev. 3.00 Mar 21, 2006 page 426 of 788
REJ09B0300-0300
BBSY
SCP
2
C Bus Interface (IIC) (Optional)
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