NEC Renesas V850/SC1 User Manual page 434

(When 9-Clock Wait Is Selected for Both Master and Slave) (2/3)
Processing by master device
IICn
ACKDn
STDn
L
SPDn L
WTIMn
H
ACKEn H
MSTSn
H
STTn L
L
SPTn
WRELn
INTIICn
TRCn
L Receive
Transfer lines
8 9
SCLn
D0 ACK
SDAn
Processing by slave device
IICn
ACKDn
STDn L
SPDn L
WTIMn H
ACKEn H
MSTSn
L
STTn
L
SPTn
L
L
WRELn
INTIICn
TRCn H Transmit
Note To cancel master wait, write FFH to IICn or set WRELn.
Remark n = 0, 1
432
CHAPTER 11 SERIAL INTERFACE FUNCTION
Figure 11-41. Example of Slave to Master Communication
(b) Data
IICn ← FFH Note
Note
1 2 3 4
D7 D6 D5 D4
IICn ← data
User's Manual U15109EJ3V0UD
5 6 7 8 9
D3 D2 D1 D0 ACK
IICn ← FFH Note
Note
1 2 3
D7 D6 D5
IICn ← data