NEC 78K0 Series User Manual page 475

Figure 17-28. Example of Slave to Master Communication
(When 8-Clock Wait Is Selected for Master, 9-Clock Wait Is Selected for Slave) (2/3)
(2) Data
Processing by master device
IIC0
ACKD0
STD0
L
SPD0 L
WTIM0
L
ACKE0 H
MSTS0
H
STT0 L
L
SPT0
WREL0
INTIIC0
TRC0 Receive
L
Transfer lines
8 9
SCL0
D0 ACK
SDA0
Processing by slave device
IIC0
ACKD0
STD0 L
SPD0 L
WTIM0 H
H
ACKE0
MSTS0
L
STT0
L
SPT0
L
L
WREL0
INTIIC0
Transmit
TRC0 H
Note To cancel master wait, write "FFH" to IIC0 or set WREL0.
CHAPTER 17 SERIAL INTERFACE IIC0
IIC0 ← FFH Note
Note
1 2 3 4 5
D7 D6 D5 D4 D3
IIC0 ← data
Preliminary User's Manual U17260EJ3V1UD
6 7 8 9
D2 D1 D0 ACK
IIC0 ← FFH Note
Note
1 2 3
D7 D6 D5
IIC0 ← data
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