CHAPTER 12 SERIAL INTERFACE FUNCTION
Preliminary User’s Manual U15905EJ1V0UD
298
12.1.2 Selecting CSI0 or I
2
C mode
CSI0 and I
2
C of the V850ES/SA2 and V850ES/SA3 share pins, and therefore these interfaces cannot be used at
the same time. Select CSI0 or I
2
C in advance by using port mode control register 4 (PMC4) and port function control
register 4 (PFC4) (refer to
4.3.5 Port 4
).
Cautions 1. CSI0 or I
2
C 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.
2. I
2
C:
µµµµ
PD703201Y, 703204Y, 70F3201Y, and 70F3204Y only
Figure 12-2. Selecting CSI0 or I
2
C Mode
7
0
PMC4
6
PMC46
5
PMC45
4
PMC44
3
PMC43
2
PMC42
1
PMC41
0
PMC40
7
0
PFC4
6
PFC46
5
0
4
PFC44
3
0
2
PFC42
1
PFC41
0
0
After reset:
00H R/W
Address:
FFFFF448H
After reset:
00H R/W
Address:
FFFFF468H
PMC4n
PFC4n
Operation mode
0
×
Port I/O mode
1
0
CSI0 mode
1
1
I
2
C mode
Remark
s 1. n = 1, 2
2.
×
= Don’t care
Summary of Contents for V850ES/SA2 UPD703201
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