Hardware manual

Rev. 3.0, 09/98, page 335 of 361
P1DDRPort 1 Data Direction Register H'FFB0 Port 1
Bit
Mode 1
Initial value
Read/Write
Modes 2 and 3
Initial value
Read/Write
7
P1
7 DDR
1
—
0
W
6
P1 6 DDR
1
—
0
W
5
P1 5 DDR
1
—
0
W
4
P1 4 DDR
1
—
0
W
3
P1 3 DDR
1
—
0
W
0
P1 0 DDR
1
—
0
W
2
P1 2 DDR
1
—
0
W
1
P1 1 DDR
1
—
0
W
Port 4 Input/Output Control
Input port
Output port
0
1
P1DRPort 1 Data Register H'FFB2 Port 1
Bit
Initial value
Read/Write
7
P1
7
0
R/W
6
P1
6
0
R/W
5
P1
5
0
R/W
4
P1
4
0
R/W
3
P1
3
0
R/W
0
P1
0
0
R/W
2
P1
2
0
R/W
1
P1
1
0
R/W