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I/O Ports
15.13.2 Register Descriptions
Port B is a general-purpose input/output port that is also used for address bus signals A[15:8], and address/
data signals ADM[15:8].
Each register for port B is described below.
Port B output register
Register symbol: PBOUT
Address:
x'36008015
Purpose:
This register sets the data to be output on port B.
Bit No.
7
6
Bit name PB7O PB6O PB5O PB4O PB3O PB2O PB1O PB0O
Reset
0
0
Access
R/W R/W R/W R/W R/W R/W R/W R/W
Port B pin register
Register symbol: PBIN
Address:
x'36008095
Purpose:
This register reads the value of the port B pins.
Bit No.
7
6
Bit name
PB7I PB6I PB5I PB4I PB3I PB2I PB1I PB0I
Reset
X
X
Access
R
R
15-58
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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