User’s Manual U11969EJ3V0UM00
293
CHAPTER 8 SERIAL INTERFACE FUNCTION
8.6 Selection of Operational Serial Interface
CSI0 and CSI1 of the V854 are alternate pins for UART and I
2
C. Therefore, they are used selecting either UART
or I
2
C.
The selection is made by the following registers.
(1) Selecting CSI0 or UART
The setting is made by the ASIM0 register and the CSIM0 register.
ASIM0 Register
CSIM0 Register
Selection of Operational Peripheral I/O
TXE
RXE
CTXE0
CRXE0
0
0
0
0
Operation stops
0
1
0
0
Selects UART
1
0
0
0
1
1
0
0
0
0
0
1
Selects CSI
0
0
1
0
0
0
1
1
Others
Setting prohibited
(2) Selecting CSI1 or I
2
C
The setting is made by the IICC register and the CSIM1 register.
IICC Register
CSIM1 Register
Selection of Operational Peripheral I/O
IICE
CTXE1
CRXE1
0
0
0
Operation stops
1
0
0
Selects I
2
C
0
0
1
Selects CSI
0
1
0
0
1
1
Others
Setting prohibited
Содержание V854 UPD703006
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