Renesas H8S Series Hardware Manual page 320

Pin
P3 /RxD1
3
P3 /RxD0
2
P3 /TxD1
1
P3 /TxD0
0
Rev.6.00 Oct.28.2004 page 292 of 1016
REJ09B0138-0600H
Selection Method and Pin Functions
The pin function is switched as shown below according to the combination of
bit RE in the SCI1 SCR, and bit P33DDR.
RE
P33DDR
Pin function P3
3
Note: * When P33ODR = 1, the pin becomes an NMOS open-drain output.
The pin function is switched as shown below according to the combination of
bit RE in the SCI0 SCR, and bit P32DDR.
RE
P32DDR
Pin function P3
2
Note: * When P32ODR = 1, the pin becomes an NMOS open-drain output.
The pin function is switched as shown below according to the combination of
bit TE in the SCI1 SCR, and bit P31DDR.
TE
P31DDR
Pin function P3
1
Note: * When P31ODR = 1, the pin becomes an NMOS open-drain output.
The pin function is switched as shown below according to the combination of
bit TE in the SCI0 SCR, and bit P30DDR.
TE
P30DDR
Pin function P3
0
Note: * When P30ODR = 1, the pin becomes an NMOS open-drain output.
0
0 1
input pin P3 output pin*
3
0
0 1
input pin P3 output pin*
2
0
0 1
input pin P3 output pin*
1
0
0 1
input pin P3 output pin*
0
1
—
RxD1 input pin
1
—
RxD0 input pin
1
—
TxD1 output pin*
1
—
TxD0 output pin*