AXIOMTEK IFO2225-873 Series, User Manual

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IFO2225-873 Series User’s Manual
Digital I/O 63
Appendix B
Digital I/O
B.1 Digital I/O Software Programming
The following example enables configuration using debug tool.
Start digital I/O programming
↓
Enable configuration:
-O 2E 87 ; Un-lock super I/O
-O 2E 87
↓
Select logic device:
-O 2E 07
-O 2F 07
↓
Enable GPIO2:
-O 2E 30
-O 2F DC
-O 2E 1C
-O 2F 1D
↓
Set I/O register: (set GP20-23: input, GP24-27: output)
-O 2E E8
-O 2F 0F ; 1: input port, 0: output port
↓
Set data register:
-O 2E E9
-O 2F 00 ; GP24-27 output ports = low
; GP20-23 input ports are read only
-I 2F ; Read GP20-23 input ports (default is high)
Note
Pin Signal Pin Signal
1 GP20 (Bit 0) 2 GP24 (Bit 4)
3 GP21 (Bit 1) 4 GP25 (Bit 5)
5 GP22 (Bit 2) 6 GP26 (Bit 6)
7 GP23 (Bit 3) 8 GP27 (Bit 7)
9 GND 10 GND