Datasheet

78K0/Kx2-L CHAPTER 15 SERIAL INTERFACE IICA
R01UH0028EJ0400 Rev.4.00 559
Sep 27, 2010
Figure 15-34. Example of Slave to Master Communication
(When 8-Clock Wait Is Selected for Master, 9-Clock Wait Is Selected for Slave) (1/3)
(1) Start condition ~ address
IICA
ACKD0
STD0
SPD0
WTIM0
H
H
L
L
L
H
L
ACKE0
MSTS0
STT0
L
L
SPT0
WREL0
INTIICA0
TRC0
IICA
ACKD0
STD0
SPD0
WTIM0
ACKE0
MSTS0
STT0
SPT0
WREL0
INTIICA0
TRC0
SCLA0
SDAA0
123456789 4 56321
AD6 AD5 AD4 AD3 AD2 AD1 AD0 D4 D3 D2D5D6D7
ACK
R
Processing by master device
Transfer lines
Processing by slave device
IICA ← address IICA ← FFH Note 1
Note 1
IICA ← data Note 2
Transmit
Transmit
Receive
Receive
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.