Abov MC97F2664, Руководство пользователя

Страница: 75 / 259

MC97F2664
April 11, 2014 Ver. 1.4 75
9.4 P1 Port
9.4.1 P1 Port Description
P1 is 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), and P1 open-drain selection register
(P1OD) . Refer to the port function selection registers for the P1 function selection.
9.4.2 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) : A1H
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
NOTE) EINT0-EINT7 function possible when input
P1PU (P1 Pull-up Resistor Selection Register) : 1009H (XSFR)
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
P1OD (P1 Open-drain Selection Register) : 1001H (XSFR)
7 6 5 4 3 2 1 0
P17OD P16OD P15OD P14OD P13OD P12OD P11OD P10OD
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value : 00H
P1OD[7:0]
Configure Open-drain of P1 Port
0 Push-pull output
1 Open-drain output