
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
108
(c) Port mode control register 3 (PMC3)
This is an 8-bit register that specifies the port mode or control mode.
This register can be read or written in 8-bit or 1-bit units.
0
PMC3
0
PMC32
PMC31
PMC30
I/O port
SCK1 I/O
PMC32
0
1
Specifies operation mode of P32 pin
I/O port
SO1/TXD0 output
PMC31
0
1
Specifies operation mode of P31 pin
I/O port
SI1/RXD0 input
PMC30
0
1
Specifies operation mode of P30 pin
After reset: 00H
R/W
Address: FFFFF446H
(d) Port function control register 3 (PFC3)
This 8-bit register specifies control mode 1 or control mode 2.
It can be read or written in 8-bit or 1-bit units.
PFC3
After reset: 00H
R/W
Address: FFFFF466H
0
PFC31
PFC30
SO1 output
TXD0 output
PFC31
0
1
Specifies operation mode of P31 pin in control mode
SI1 input
RXD0 input
PFC30
0
1
Specifies operation mode of P30 pin in control mode