Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 17 ASYNCHRONOUS SERIAL INTERFACE C (UARTC)
R01UH0042EJ0500 Rev.5.00 Page 727 of 1513
Aug 12, 2011
17.3.5 Mode switching between UARTC4, CSIF0, and I
2
C01
In the V850ES/JG3-H and V850ES/JH3-H, UARTC4, CSIF0, and I
2
C01 share the same pin and therefore cannot be
used simultaneously. Set UARTC4 in advance, using the PMC4, PFC4, and PMCE4 registers, before use.
Caution The transmit/receive operation of UARTC4, CSIF0, 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 17-6. UARTC4, CSIF0 and I
2
C01 Mode Switch Settings
PMC4
After reset: 00H R/W Address: FFFFF448H
0 0 0 0 0 PMC42 PMC41 PMC40
PFC4
After reset: 00H R/W Address: FFFFF468H
0 0 0 0 0 PFC42 PFC41 PFC40
0 0 0 0 0 0 PFCE41 PFCE40
PFCE4
After reset: 00H R/W Address: FFFFF708H
Port I/O mode
SIF0 (CSIF0)
TXDC4 (UARTC4)
SDA01 (I
2
C01)
PMC40
0
1
1
1
Operation mode
PFCE40
×
0
0
1
PFC40
×
0
1
0
Port I/O mode
SOF0 (CSIF0)
RXDC4 (UARTC4)
SCL01 (I
2
C01)
PMC41
0
1
1
1
Operation mode
PFCE41
×
0
0
1
PFC41
×
0
1
0
Remark × = don’t care