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CHAPTER 16 SERIAL INTERFACE IICA
User’s Manual U19780EJ2V0UD
500
Figure 16-33. Example of Slave to Master Communication
(When 8-Clock and 9-Clock Wait Is Selected for Master, 9-Clock Wait Is Selected for Slave) (3/3)
(3) Stop condition
IICA
ACKD0
STD0
SPD0
WTIM0
H
H
L
L
L
ACKE0
MSTS0
STT0
SPT0
WREL0
INTIICA0
TRC0
IICA
ACKD0
STD0
SPD0
WTIM0
ACKE0
MSTS0
STT0
SPT0
WREL0
INTIICA0
TRC0
SCLA0
SDAA0
1
2
3
4
5
6
7
8
9
1
D7
D6
D5
D4
D3
D2
D1
D0
AD6
NACK
Processing by master device
Transfer lines
Processing by slave device
IICA
←
address
IICA
←
FFH
Note 1
IICA
←
FFH
Note 1
Note 1
Note 3
Notes 1, 3
IICA
←
data
Note 2
Stop
condition
Start
condition
(When SPIE0 = 1)
(When SPIE0 = 1)
Receive
Receive
Transmit
Notes 1.
To cancel wait, write “FFH” to IICA or set WREL0.
2.
Write data to IICA, not setting WREL0, in order to cancel a wait state during slave transmission.
3.
If a wait state during slave transmission is canceled by setting WREL0, TRC0 will be cleared.