Abov MC96F6332D, Руководство пользователя

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MC96F6432
80 June 22, 2018 Ver. 2.9
9.6 P3 Port
9.6.1 P3 Port Description
P3 is 8-bit I/O port. P3 control registers consist of P3 data register (P3), P3 direction register (P3IO) and P3
pull-up resistor selection register (P3PU). Refer to the port function selection registers for the P3 function
selection.
9.6.2 Register description for P3
P3 (P3 Data Register) : 98H
7 6 5 4 3 2 1 0
P37 P36 P35 P34 P33 P32 P31 P30
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value : 00H
P3[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(P30)
→
if(P3 & 0x01)
P3IO (P3 Direction Register) : C1H
7 6 5 4 3 2 1 0
P37IO P36IO P35IO P34IO P33IO P32IO P31IO P30IO
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value : 00H
P3IO[7:0] P3 Data I/O Direction
0 Input
1 Output
P3PU (P3 Pull-up Resistor Selection Register) : AFH
7 6 5 4 3 2 1 0
P37PU P36PU P35PU P34PU P33PU P32PU P31PU P30PU
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value : 00H
P3PU[7:0] Configure Pull-up Resistor of P3 Port
0 Disable
1 Enable