CHAPTER 12 SERIAL INTERFACE FUNCTION
Preliminary User’s Manual U15905EJ1V0UD
394
12.4.14 Communication operations
(1) Master operations
The following is a flow chart of the master operations.
Figure 12-36. Master Operation Flow Chart
IICCL
←
××
H
Select transfer clock.
IICC
←
××
H
IICE = SPIE = WTIM = 1
SPT = 1
Start IIC write transfer.
Start IIC write transfer.
WREL = 1
Start reception.
Generate stop condition.
(no slave with matching address)
Generate restart condition
or stop condition.
START
Data processing
Data processing
ACKE = 0
No
Yes
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
INTIIC = 1?
WTIM = 0
ACKE = 1
INTIIC = 1?
Transfer completed?
INTIIC = 1?
ACKD = 1?
TRC = 1?
INTIIC = 1?
ACKD = 1?
; Stop condition detection
; Initializes IICC register
; Address transfer completion
No (receive)
Yes (transmit)
Summary of Contents for V850ES/SA2 UPD703201
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