Abov MC96F6332D, User Manual

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MC96F6432
78 June 22, 2018 Ver. 2.9
9.5 P2 Port
9.5.1 P2 Port Description
P2 is 8-bit I/O port. P2 control registers consist of P2 data register (P2), P2 direction register (P2IO), P2 pull-up
resistor selection register (P2PU) and P2 open-drain selection register (P2OD). Refer to the port function
selection registers for the P2 function selection.
9.5.2 Register description for P2
P2 (P2 Data Register) : 90H
7 6 5 4 3 2 1 0
P27 P26 P25 P24 P23 P22 P21 P20
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value : 00H
P2[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(P20)
→
if(P2 & 0x01)
P2IO (P2 Direction Register) : B9H
7 6 5 4 3 2 1 0
P27IO P26IO P25IO P24IO P23IO P22IO P21IO P20IO
R/W R/W R/W R/W R/W R/W R/W R/W
Initial value : 00H
P2IO[7:0] P2 Data I/O Direction
0 Input
1 Output
NOTE: SS1 function possible when input