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I/O Ports
15-54
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. 76543210
Bit name PA7O PA6O PA5O PA4O PA3O PA2O PA1O PA0O
Reset 00000000
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. 76543210
Bit name PA7I PA6I PA5I PA4I PA3I PA2I PA1I PA0I
Reset XXXXXXXX
Access RRRRRRRR