CHAPTER 12 SERIAL INTERFACE FUNCTION
Preliminary User’s Manual U15905EJ1V0UD
297
12.1.1 Selecting CSI1 or UART0 mode
CSI1 and UART0 of the V850ES/SA2 and V850ES/SA3 share pins, and therefore these interfaces cannot be used
at the same time. Select CSI1 or UART0 in advance by using port mode control register 3 (PMC3) and port function
control register 3 (PFC3) (refer to
4.3.3 Port 3
).
Caution CSI1 or UART0 transmission/reception operations are not guaranteed if the mode is changed
during transmission or reception. Be sure to disable the operation of the unit that is not used.
Figure 12-1. Selecting CSI1 or UART0 Mode
7
0
PMC3
6
0
5
0
4
0
3
0
2
PMC32
1
PMC31
0
PMC30
7
0
PFC3
6
0
5
0
4
0
3
0
2
0
1
PFC31
0
PFC30
After reset:
00H R/W
Address:
FFFFF446H
After reset:
00H R/W
Address:
FFFFF466H
PMC3n
PFC3n
Operation mode
0
×
Port I/O mode
1
0
CSI1 mode
1
1
UART0 mode
Remark
s 1. n = 0, 1
2.
×
= Don’t care
Содержание V850ES/SA2 UPD703201
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