Abov MC97F60128, Руководство пользователя

Страница: 93 / 382

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