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I/O Ports
Port 4 input/output control register
Register symbol: P4DIR
Address:
x'36008068
Purpose:
This register sets the port 4 pins for input or output.
(0: input; 1: output)
Bit No.
7
6
Bit name
-
-
P45D P44D P43D P42D P41D P40D
Reset
0
0
Access
R
R
R/W R/W R/W R/W R/W R/W
Port 4 output mode register
Register symbol: P4MD
Address:
x'36008028
Purpose:
Along with P4SS, this register selects the content output on the port 4 pins.
Bit No.
7
6
Bit name
-
-
P45M P44M P43M P42M P41M P40M
Reset
0
0
Access
R
R
R/W R/W R/W R/W R/W R/W
15-26
5
4
3
2
0
0
0
0
5
4
3
2
1
1
1
1
1
0
0
0
1
0
1
1
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