Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 19 I
2
C BUS
R01UH0042EJ0500 Rev.5.00 Page 816 of 1513
Aug 12, 2011
19.1.3 UARTC1 and I
2
C02 mode switching
In the V850ES/JG3-H and V850ES/JH3-H, UARTC1 and I
2
C02 share the same pins and therefore cannot be used
simultaneously. Switching between UARTC1 and I
2
C02 must be set in advance, using the PMC9, PFC9, and PFCE9
registers.
Caution The transmit/receive operation of UARTC1 and I
2
C02 is not guaranteed if these functions are
switched during transmission or reception. Be sure to disable the one that is not used.
Figure 19-3. UARTC1 and I
2
C02 Mode Switch Settings
PMC9
After reset: 0000H R/W Address: FFFFF452H, FFFFF453H
PMC97 PMC96 PMC95 PMC94 PMC93 PMC92 PMC91 PMC90
PMC915 PMC914 PMC913 PMC912 PMC911 PMC910 PMC99 PMC98
89101112131415
PFC9
After reset: 0000H R/W Address: FFFFF472H, FFFFF473H
PFC915 PFC914 PFC913 PFC912 PFC911 PFC910 PFC99 PFC98
PFC97 PFC96 PFC95 PFC94 PFC93 PFC92 PFC91 PFC90
89101112131415
PFCE915 PFCE914 0 0 PFCE911 PFCE910 PFCE99 PFCE98
PFCE97 PFCE96 PFCE95 PFCE94 PFCE93 PFCE92 PFCE91 PFCE90
89101112131415
PFCE9
After reset: 0000H R/W Address: FFFFF712H, FFFFF713H
UARTC1 mode
I
2
C02 mode
PMC9n
1
1
Operation mode
PFCE9n
0
1
PFC9n
1
0
Remark n = 0, 1
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