Abov A96G166 User Manual

5. I/O ports A96G166/A96A166/A96S166 User’s manual
50
5.5 P3 port
5.5.1 P3 port description
P3 is an 8-bit I/O port. P3 control registers consist of P3 data register (P3), P3 direction register (P3IO)
and P3 pull-up resistor selection register (P3PU). Refer to the port function selection registers for the
P3 function selection.
5.5.2 Register description for P3
P3 (P3 Data Register): 98H
7
6
5
4
3
2
1
0
P37
P36
P35
P34
P33
P32
P31
P30
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P3[7:0]
I/O Data
P3IO (P3 Direction Register): 99H
7
6
5
4
3
2
1
0
P37IO
P36IO
P35IO
P34IO
P33IO
P32IO
P31IO
P30IO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P3IO[7:0]
P3 Data I/O Direction
0
Input
1
Output
P3PU (P3 Pull-up Resistor Selection Register): AFH
7
6
5
4
3
2
1
0
P37PU
P36PU
P35PU
P34PU
P33PU
P32PU
P31PU
P30PU
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P3PU[7:0]
Configure Pull-up Resistor of P3 Port
0
Disable
1
Enable
P3OD (P3 Open-drain Selection Register): 94H
7
6
5
4
3
2
1
0
P37OD
P36OD
P35OD
P34OD
P33OD
P32OD
P31OD
P30OD
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P3OD[7:0]
Configure Open-drain of P3 Port
0
Push-pull output
1
Open-drain output

Abov A96G166 Specifications

General

Brand	Abov
Model	A96G166
Category	Computer Hardware
Language	English