h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 539
h8s-2158
Manufacturer Part Number
h8s-2158
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2158.pdf
(927 pages)
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Bit
3
2
0
Bit Name
ACKE
BBSY
SCP
Initial Value R/W
0
0
1
R/W
R/W
W
Description
Acknowledge Bit Decision Selection
0: The value of the received acknowledge bit is ignored,
1: If the received acknowledge bit is 1, continuous
Depending on the receiving device, the acknowledge bit
may be significant, in indicating completion of processing
of the received data, for instance, or may be fixed at 1
and have no significance.
Bus Busy
Start Condition/Stop Condition Prohibit
In master mode:
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
In slave mode:
Writing to the BBSY flag is disabled.
[BBSY setting condition]
[BBSY clearing condition]
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.
and continuous transfer is performed. The value of the
received acknowledge bit is not indicated by the ACKB
bit in ICSR, which is always 0.
transfer is halted.
When the SDA level changes from high to low under
the condition of SCL = high, assuming that the start
condition has been issued.
When the SDA level changes from low to high under
the condition of SCL = high, assuming that the start
condition has been issued.
2
C bus interface must be set in master transmit
Rev. 3.00 Jan 25, 2006 page 487 of 872
Section 17 I
2
C Bus Interface (IIC)
REJ09B0286-0300
2
C bus
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