User’s Manual U11969EJ3V0UM00
277
CHAPTER 8 SERIAL INTERFACE FUNCTION
8.4.7 Communication operation
(1) Master operation
The following shows the master communication procedure.
Figure 8-25. Master Operation Procedure
START
Data processing
IICCL
←
xxH
Selects transfer clock
IICC
←
xxH
IICE = SPIE = WTIM = 1
STT = 1
Generates stop condition
absence of slave of the
address coincidence
IIC write
Transfer starts
WTIM = 0
ACKE = 1
INTIIC = 1?
; Detects stop condition
; Address transfer ends
Yes (Transmission)
Yes
Yes
Yes
INTIIC = 1?
ACKD = 1?
TRC = 1?
INTIIC = 1?
ACKD = 1?
Data processing
ACKE = 0
WREL = 1
Reception starts
INTIIC = 1?
Transfer ends?
(
)
No (Reception)
No
Yes
No
Yes
No
Yes
No
No
Yes
No
No
IIC write
Transfer starts
Generates
restart condition or
stop condition
Содержание V854 UPD703006
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