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I/O Ports
15.12.2 Register Descriptions
Port A is a general-purpose input/output port that is also used for address bus signals A[7:0], and address/
data signals ADM[7:0].
Each register for port A is described below.
Port A output register
Register symbol: PAOUT
Address:
x'36008014
Purpose:
This register sets the data to be output on port A.
Bit No.
7
6
Bit name PA7O PA6O PA5O PA4O PA3O PA2O PA1O PA0O
Reset
0
0
Access
R/W R/W R/W R/W R/W R/W R/W R/W
Port A pin register
Register symbol: PAIN
Address:
x'36008094
Purpose:
This register reads the value of the port A pins.
Bit No.
7
6
Bit name
PA7I PA6I PA5I PA4I PA3I PA2I PA1I PA0I
Reset
X
X
Access
R
R
15-54
5
4
3
2
0
0
0
0
5
4
3
2
X
X
X
X
R
R
R
R
1
0
0
0
1
0
X
X
R
R
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