Abov A96G166 User Manual

5. I/O ports A96G166/A96A166/A96S166 User’s manual
44
5.3 P1 port
5.3.1 P1 port description
P1 is an 8-bit I/O port. P1 control registers consist of P1 data register (P1), P1 direction register
(P1IO), debounce enable register (P1DB), P1 pull-up resistor selection register (P1PU), andP1 open-
drain selection register (P1OD). Refer to the port function selection registers for the P1 function
selection.
5.3.2 Register description for P1
P1 (P1 Data Register): 88H
7
6
5
4
3
2
1
0
P17
P16
P15
P14
P13
P12
P11
P10
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P1[7:0]
I/O Data
P1IO (P1 Direction Register): B1H
7
6
5
4
3
2
1
0
P17IO
P16IO
P15IO
P14IO
P13IO
P12IO
P11IO
P10IO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P1IO[7:0]
P1 Data I/O Direction
0
Input
1
Output
NOTES:
1. EC1 (P11) function possible when input
2. EC2 (P17) function is available only when P37 is not EC2
function and EC2 is used in TIMER2.
P1PU (P1 Pull-up Resistor Selection Register): ADH
7
6
5
4
3
2
1
0
P17PU
P16PU
P15PU
P14PU
P13PU
P12PU
P11PU
P10PU
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P1PU[7:0]
Configure Pull-up Resistor of P1 Port
0
Disable
1
Enable

Abov A96G166 Specifications

General

Brand	Abov
Model	A96G166
Category	Computer Hardware
Language	English