AXIOMTEK EP850 Series, User Manual

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EP850 All-In-One EPIC Board User’s Manual
Digital I/O
61
APPENDIX B
DIGITAL I/O
Using the
Digital I/O Function
Start
↓
Un-Lock SuperI /O:
O 2E 87 ; Un-lock super I/O
O 2E 87 ; Un-lock super I/O
↓
Select Enable Digital I/O Function:
O 2E 07
O 2F 00
↓
O 2E 2A
O 2F FC
↓
Select Logic device:
O 2E 07
O 2F 07
↓
Activate Logic Device:
O 2E 30
O 2F 01
↓
Read Data:
O 2E F0
I 2F ( default value is E0 )
Output Data:
O 2E F1
O 2F FF
Note:
Bit 7~5 => Input pin
Bit 4~0 => Output pin