NEC V850ES/F 3-L Series User Manual page 451

Clocked Serial Interface (CSIB)
(3)
START
Note 1
Initial setting (CBnCTL0 ,
CBnCTL1 registers, etc.)
Write CBnTX register
(start transfer).
INTCBnR interrupt
signal?
Yes
Transmission/reception
Reception
Transmission
Transfer end?
CBnPWR bit = 0,
CBnTXE bit = CBnRXE bit = 0
(CBnCTL0)
END
Note
Caution
Single transmission/reception
No
Read CBnRX register.
No
Yes
Note 2
Write CBnTX register .
B
A
1. Set the CBnSCE bit to 1 in the initial setting.
2. If the next transfer is reception only, dummy data is written to the CBnTX
register.
Even in the single mode, the CBnSTR.CBnOVE flag is set to 1. If only
transmission is used in the transmission/reception mode, therefore,
programming without checking the CBnOVE flag is recommended.
User's Manual U18743EE1V2UM00
No
Transfer end?
Yes
Note 2
Write CBnTX register
B
Read CBnRX register.
No
Transfer end?
Yes
. Write CBnTX register
A
Chapter 16
Note 2
.
451