74
MC96F6432S
ABOV Semiconductor Co., Ltd.
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)
1.
Do not use the “direct bit test and branch” instruction for input port. More detail information is at chapter
17.2 Instructions on how to use the input port.
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
Summary of Contents for MC96F6432S Series
Page 15: ...15 MC96F6432S ABOV Semiconductor Co Ltd 4 Package Diagram Figure 4 1 44 Pin MQFP Package...
Page 16: ...16 MC96F6432S ABOV Semiconductor Co Ltd Figure 4 2 32 Pin LQFP Package...
Page 17: ...17 MC96F6432S ABOV Semiconductor Co Ltd Figure 4 3 32 Pin SOP Package...
Page 18: ...18 MC96F6432S ABOV Semiconductor Co Ltd Figure 4 4 28 Pin SOP Package...
Page 19: ...19 MC96F6432S ABOV Semiconductor Co Ltd Figure 4 5 28 Pin TSSOP Package...
