Section 18
I
2
C Bus Interface (IIC)
Rev. 1.00 Apr. 28, 2008 Page 565 of 994
REJ09B0452-0100
12. Clear the IRIC flag to 0.
Write 0 to ACKE in ICCR, to clear received ACKB contents to 0.
Write 0 to BBSY and SCP in ICCR. This changes SDA from low to high when SCL is high,
and generates the stop condition.
SDA
(master output)
SDA
(slave output)
2
1
R/
W
4
3
6
5
8
7
1
2
9
A
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
ICDRE
IRTR
ICDRT
Note:
*
Data write
in ICDR
prohibited
SCL
(master output)
Start condition generation
Slave address
Data 1
Data 1
[9] ICDR write
[9] IRIC clear
[6] ICDR write
[6] IRIC clear
[4] BBSY set to 1
SCP cleared to 0
(start condition issuance)
User processing
Interrupt
request
Interrupt
request
A R/
W
IRIC
[7]
[5]
ICDRS
Data 1
A R/
W
Figure 18.8 Example of Operation Timing in Master Transmit Mode (MLS = WAIT = 0)
Содержание H8S/2100 Series
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