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Chapter 13
3-Wire Serial Interface (CSIB)
User’s Manual U16702EE3V2UD00
(3)
Single Transmission/reception
Figure 13-19:
Single Transmission/Reception Flow (Master)
Notes: 1.
Set the CBnSCE bit to 1 at the initial setting
2.
If the transfer is reception only, write dummy data to the CBnTX register.
Caution:
Even in single mode, the CBnOVE flag (CBnSTR register) is set to 1. If only transmis-
sion is used in the transmission/reception mode, there is no need to check this flag.
No
END
Yes
CBnPWR = 0,
CBnTXE=CBnRXE=0
(CBnCTL0)
Write CBnTX
(=> start transfer)
START
Initial settings
CBnCTL0
Note 1
/CBnCTL1, etc.
INTCBnR = 1?
CBnRX read
No
Transfer end?
Transmission/reception
or reception only
Transmission only
Yes
Note 2
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