Boser HS-1743, Manual

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3.21 8-bit GPIO Function
The HS-1743 offers one 8-bit general purpose input/output port.
z CN21: 8-bit GPIO
PIN Description PIN Description
1 VCC 2 GND
3 GD0 4 GD4
5 GD1 6 GD5
7 GD2 8 GD6
9 GD3 10 GD7
2
1 9
10
W83627EHG
Digital I/O Assembly sample code
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Extended function mode
------------------------------------
MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
-------------------------------------
Configure logical device 7
-------------------------------------
MOV DX,2EH
MOV AL,07H
OUT DX,AL
MOV DX,2FH
MOV AL,07H
OUT DX,AL
MOV DX,2EH
MOV AL,30H ; Enable GPIO1
OUT DX,AL
MOV DX,2FH
MOV AL,01H
OUT DX,AL