Abov MC97F60128 - P4 Port; P4 Port Description; Register Description for P4

93
MC97F60128
ABOV Semiconductor Co., Ltd.
9.7 P4 Port
9.7.1 P4 Port Description
P4 is 8-bit I/O port. P4 control registers consist of P4 data register (P4), P4 direction register (P4IO), debounce enable
register (P46DB), P4 pull-up resistor selection register (P4PU) and P4 open-drain selection register (P4OD).Refer to
the port function selection registers for the P4 function selection.
9.7.2 Register description for P4
P4 (P4 Data Register): A0H
7
6
5
4
3
2
1
0
P47
P46
P45
P44
P43
P42
P41
P40
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P4[7:0]
I/O Data
P4IO (P4 Direction Register): B1H
7
6
5
4
3
2
1
0
P47IO
P46IO
P45 IO
P44IO
P43IO
P42IO
P41IO
P40IO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P4IO[7:0]
P4 Data I/O Direction
0
Input
1
Output
NOTE)
1. EINT10–EINT12/EC0–EC2/SS0 function possible
when input
P4PU (P4 Pull-up Resistor Selection Register): EEH
7
6
5
4
3
2
1
0
P47PU
P46PU
P45PU
P44PU
P43PU
P42PU
P41PU
P40PU
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P4PU[7:0]
Configure Pull-up Resistor of P4 Port
0
Disable
1
Enable
P4OD (P4 Open-drain Selection Register): 4014H (XSFR)
7
6
5
4
3
2
1
0
P47OD
P46OD
P45OD
P44OD
P43OD
P42OD
P41OD
P40OD
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
P4OD[7:0]
Configure Open-drain of P4 Port
0
Push-pull output
1
Open-drain output