h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 325

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Note:
Bit
2
0
*
Bit Name
BBSY
SCP
The value in BBSY flag does not change even if written.
Initial
Value
0
1
R/W
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
mode 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
Rev. 1.00, 05/04, page 291 of 544
2
C bus