Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 18 3-WIRE VARIABLE-LENGTH SERIAL I/O (CSIF)
R01UH0042EJ0500 Rev.5.00 Page 763 of 1513
Aug 12, 2011
18.1.2 CSIF0, UARTC4, and I
2
C01 mode switching
In the V850ES/JG3-H and V850ES/JH3-H, CSIF0, UARTC4, and I
2
C01 share the same pins and therefore cannot be
used simultaneously. Switching among CSIF0, UARTC4, and I
2
C01 must be set in advance, using the PMC4, PFC4, and
PFCE4 registers.
Caution The transmit/receive operation of CSIF0, UARTC4, and I
2
C01 is not guaranteed if these functions are
switched during transmission or reception. Be sure to disable the one that is not used.
Figure 18-2. CSIF0, UARTC4, and I
2
C01 Mode Switch Settings
Port I/O mode
CSIF0 mode
UARTC4 mode
I
2
C01 mode
PMC4n
0
1
1
1
Operation mode
PFCE4n
×
0
0
1
PFC4n
×
0
1
0
0 0 0 0 0 PMC42 PMC41 PMC40
PMC4
After reset: 00H R/W Address: FFFFF448H
After reset: 00H R/W Address: FFFFF468H
PFC4
0 0 0 0 0 PFC42 PFC41 PFC40
01234567
PFCE4
0 0 0 0 0 0 PFCE41 PFCE40
After reset: 00H R/W Address: FFFFF708H
Remarks 1. n = 0, 1
2. × = don’t care