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User’s Manual U11969EJ3V0UM00
249
CHAPTER 8 SERIAL INTERFACE FUNCTION
Figure 8-20. Wait Signal (2/2)
(2) When both master and slave are 9-clock wait
(master: transmission, slave: reception, ACKE = 1)
The wait of the IICC register automatically generates according to the setting of WTIM.
Normally, the receive side releases wait when WREL = 1 or when FFH is written to IIC, and the transmit side
releases wait when data is written to IIC.
For the master, wait can be released also with the following method.
• STT = 1
• SPT = 1
6
7
8
1
2
3
9
SCL
6
7
8
1
2
3
9
D2
D1
D0
D7
D6
D5
ACK
SCL
SDA
IIC
Master
Slave
Transfer line
Both master and slave wait
after outputting the ninth clock
IIC
←
data (wait released)
SCL
ACKE
H
IIC
IIC
←
FFH (wait released)
or WREL
←
1
Output according to the ACKE previously set.
Содержание V854 UPD703006
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