Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 18 3-WIRE VARIABLE-LENGTH SERIAL I/O (CSIF)
R01UH0042EJ0500 Rev.5.00 Page 762 of 1513
Aug 12, 2011
CHAPTER 18 3-WIRE VARIABLE-LENGTH SERIAL I/O (CSIF)
18.1 Mode Switching of CSIF and Other Serial Interfaces
18.1.1 CSIF4 and UARTC0 mode switching
In the V850ES/JG3-H and V850ES/JH3-H, CSIF4 and UARTC0 share the same pins and therefore cannot be used
simultaneously. To use CSIF4, the use of CSIF4 must be set in advance, using the PMC3, PFC3 and PFCE3 registers.
Caution The transmit/receive operation of CSIF4 and UARTC0 is not guaranteed if these functions are
switched during transmission or reception. Be sure to disable the one that is not used.
Figure 18-1. CSIF4 and UARTC0 Mode Switch Settings
Port I/O mode
ASCKC0
SCKF4
Port I/O mode
UARTC0 mode
CSIF4 mode
PMC32
0
1
1
PMC3n
0
1
1
Operation mode
Operation mode
PFCE32
×
0
0
PFC32
×
0
1
PFC3n
×
0
1
PMC37 PMC36 PMC35 PMC34 PMC33 PMC32 PMC31 PMC30
PMC3
After reset: 00H R/W Address: FFFFF446H
After reset: 00H R/W Address: FFFFF466H
PFC3
PFC37 PFC36 PFC35 PFC34 PFC33 PFC32 PFC31 PFC30
01234567
PFCE3
PFCE37 PFCE36 PFCE35 PFCE34 PFCE33 PFCE32 PFCE31 PFCE30
After reset: 00H R/W Address: FFFFF706H
Remarks 1. n = 0, 1
2. × = don’t care