Abov A96G174 - P2 Port; P2 Port Description; Register Description for P2

A96G174/A96S174 User’s manual 6. I/O ports
53
6.4 P2 port
6.4.1 P2 port description
P2 is an 8-bit I/O port. P2 control registers consist of P2 data register (P2), P2 direction register (P2IO),
P2 pull-up resistor selection register (P2PU) andP2 open-drain selection register (P2OD).Refer to the
port function selection registers for the P2 function selection.
6.4.2 Register description for P2
P2 (P2 Data Register): 90H
7
6
5
4
3
2
1
0
-
-
-
-
-
P22
P21
P20
-
-
-
-
-
R/W
R/W
R/W
Initial value: 00H
P2[2:0]
I/O Data
P2IO (P2 Direction Register): B9H
7
6
5
4
3
2
1
0
-
-
-
-
-
P22IO
P21IO
P20IO
-
-
-
-
-
R/W
R/W
R/W
Initial value: 00H
P2IO[2:0]
P2 Data I/O Direction
0
Input
1
Output
P2PU (P2 Pull-up Resistor Selection Register): AEH
7
6
5
4
3
2
1
0
-
-
-
-
-
P22PU
P21PU
P20PU
-
-
-
-
-
R/W
R/W
R/W
Initial value: 00H
P2PU[2:0]
Configure Pull-up Resistor of P2 Port
0
Disable
1
Enable
P2OD (P2 Open-drain Selection Register): 93H
7
6
5
4
3
2
1
0
-
-
-
-
-
P22OD
P21OD
P20OD
-
-
-
-
-
R/W
R/W
R/W
Initial value: 00H
P2OD[2:0]
Configure Open-drain of P2 Port
0
Push-pull output
1
Open-drain output