Datasheet

78K0/Ix2 CHAPTER 15 SERIAL INTERFACE IICA
R01UH0010EJ0500 Rev.5.00 547
Feb 28, 2012
Figure 15-34. 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
IICA
ACKD0
STD0
SPD0
WTIM0
H
H
H
L
L
L
L
L
L
L
H
H
L
L
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
89
2345678 9
321
D7
D0 ACK
D6 D5 D4 D3 D2 D1 D0 ACK
D5D6D7
Processing by master device
Transfer lines
Processing by slave device
Note 1 Note 1
Receive
Transmit
IICA ← data Note 2 IICA ← data Note 2
IICA ← FFH Note 1 IICA ← FFH Note 1
Notes 1. To cancel master 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.