Abov MC96F6332D, User Manual

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MC96F6432
76 June 22, 2018 Ver. 2.9
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 (P15DB), 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
Note) Do not use the
“direct bit test and branch” instruction for input port, more detail information is at
Appendix B.
Example) Avoid direct input port bit test and branch condition as below
If(P10)
→
if(P1 & 0x01)
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
NOTE: EINT6/ENINT7/EINT11/EINT12/SS2/EC1 function possible
when input
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