CHAPTER 14 PORT FUNCTIONS
User’s Manual U14359EJ4V0UM
477
(c) Port 3 function control register (PFC3)
This register can be read/written in 8-bit or 1-bit units. Bits 5 to 7, however, are fixed to 0, so writing 1 to
these bits is ignored.
Caution
When the port mode is specified by the port 3 mode control register (PMC3), the PFC3
setting becomes invalid.
7
6
5
4
3
2
1
0
Address
After reset
PFC3
0
0
0
PFC34
PFC33
PFC32
PFC31
PFC30
FFFFF466H
00H
Bit position
Bit name
Function
4
PFC34
Port Function Control
Specifies operation mode of P34 pin in control mode.
0: RXD2 input mode
1: External interrupt request (INTP120) input mode
3
PFC33
Port Function Control
Specifies operation mode of P33 pin in control mode.
0: TXD2 output mode
1: External interrupt request (INTP133) input mode
2
PFC32
Port Function Control
Specifies operation mode of P32 pin in control mode.
0: SCK2 I/O mode
1: External interrupt request (INTP132) input mode
1
PFC31
Port Function Control
Specifies operation mode of P31 pin in control mode.
0: SI2 input mode
1: External interrupt request (INTP131) input mode
0
PFC30
Port Function Control
Specifies operation mode of P30 pin in control mode.
0: SO2 output mode
1: External interrupt request (INTP130) input mode