NEC 78K0 Series User Manual page 474

(When 8-Clock Wait Is Selected for Master, 9-Clock Wait Is Selected for Slave) (1/3)
(1) Start condition ~ address
Processing by master device
IIC0 IIC0
ACKD0
STD0
SPD0
WTIM0
L
ACKE0 H
MSTS0
STT0
L
SPT0
WREL0
INTIIC0
TRC0
Transfer lines
SCL0
AD6 AD5 AD4 AD3 AD2 AD1 AD0
SDA0
Start condition
Processing by slave device
IIC0
ACKD0
STD0
SPD0
WTIM0 H
H
ACKE0
MSTS0 L
L
STT0
L
SPT0
L
WREL0
INTIIC0
TRC0
Note To cancel master wait, write "FFH" to IIC0 or set WREL0.
474
CHAPTER 17 SERIAL INTERFACE IIC0
Figure 17-28. Example of Slave to Master Communication
←
address
1 2 3 4 5 6
Preliminary User's Manual U17260EJ3V1UD
IIC0
7 8 9 1
R ACK D7
←
IIC0
←
FFH Note
Note
2 3 4 5 6
D6 D5 D4 D3 D2
data