AXIOMTEK IFO2175-873 Series User Manual page 64

IFO2175-873 Series Panel PC User's Manual
Digital I/O Software Programming
(Following is example to enable configuration by using debug tool)
1.Enable SIO configuration
-O 2E 87
-O 2E 87
2. Select Logic device:
-O 2E 07
-O 2F 07
3. GPIO2 Enable
-O 2E 30
-O 2F DC
-O 2E 1C
-O 2F 1D
4. Set IO register (set GP20-23: input, GP24-27: output)
-O 2E E8
-O 2F 0F  (1: input port, 0: output port)
5. Data register
-O 2E E9
-O 2F 00  GP24-27 output ports = low
- I 2F  GP20-23 input ports read (default is high)
Note
GP20 =Bit0
GP21 =Bit1
GP22 =Bit2
GP23 =Bit3
GP24 =Bit4
GP25 =Bit5
GP26 =Bit6
GP27 =Bit7
56
GP20-23 input ports is read only
Pin Assignment
Watchdog Timer