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| UPD70F3218 Datasheet, PDF (611/884 Pages) NEC – 32-Bit Single-Chip Microcontrollers | |||
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CHAPTER 19 I2C BUS
Figure 19-21. Example of Master to Slave Communication
(When 9-Clock Wait Is Selected for Both Master and Slave) (2/3)
Processing by master device
IICn
IICn â data
(b) Data
ACKDn
STDn L
SPDn L
WTIMn H
ACKEn H
MSTSn H
STTn L
SPTn L
WRELn L
INTIICn
TRCn H Transmit
Transfer lines
SCLn 8 9
123456789
SDAn D0
D7 D6 D5 D4 D3 D2 D1 D0
Processing by slave device
IICn
ACKDn
STDn L
SPDn L
WTIMn H
ACKEn H
MSTSn L
STTn L
SPTn L
WRELn
INTIICn
TRCn L Receive
IICn â FFH Note
Note
Note To cancel slave wait, write FFH to IICn or set WRELn.
Remark n = 0, 1
Userâs Manual U16889EJ1V0UD
IICn â data
123
D7 D6 D5
IICn â FFH Note
Note
611
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