Datasheet

Section 9 I/O Ports
Rev.6.00 Sep. 27, 2007 Page 378 of 1268
REJ09B0220-0600
Pin Selection Method and Pin Functions
P3
3
/RxD
1
The pin function is switched as shown below according to the combination of
bit RE in the SCI1 SCR, and bit P33DDR.
RE 0 1
P33DDR 0 1 —
Pin function P3
3
input pin P3
3
output pin
*
RxD
1
input pin
Note: * When P33ODR = 1, the pin becomes an NMOS open-drain output.
P3
2
/RxD
0
The pin function is switched as shown below according to the combination of
bit RE in the SCI0 SCR, and bit P32DDR.
RE 0 1
P32DDR 0 1 —
Pin function P3
2
input pin P3
2
output pin
*
RxD
0
input pin
Note: * When P32ODR = 1, the pin becomes an NMOS open-drain output.
P3
1
/TxD
1
The pin function is switched as shown below according to the combination of
bit TE in the SCI1 SCR, and bit P31DDR.
TE 0 1
P31DDR 0 1 —
Pin function P3
1
input pin P3
1
output pin
*
TxD
1
output pin
Note: * When P31ODR = 1, the pin becomes an NMOS open-drain output.
P3
0
/TxD
0
The pin function is switched as shown below according to the combination of
bit TE in the SCI0 SCR, and bit P30DDR.
TE 0 1
P30DDR 0 1 —
Pin function P3
0
input pin P3
0
output pin
*
TxD
0
output pin
Note: * When P30ODR = 1, the pin becomes an NMOS open-drain output.