9
Pin 1 & 2 of AT_COPEN (4-pin): AT Mode Function Select
AT_COPEN(Pin 1&2)
→
AT Mode Select
1-2 Close: AT Mode Selected.
1-2 Open: ATX Mode Selected;
Pin 1
2
2
4
4
3
Pin 1
3
*ATX Mode Selected: Press power button to power on after power input ready;
AT Mode Selected: Directly power on as power input ready.
Pin 3 & 4 of AT_COPEN (4-pin): Case Open Message Display Function Select
AT_COPEN (Pin 3&4)
→
Case Open Function Select
3-4 Close: Case Open Function Selected (One Touch).
3-4 Open: Normal;
Pin 1
2
2
4
4
3
Pin 1
3
Pin 3-4 Close
:
When Case open function pin short to GND, the Case open function
was detected. When Used, needs to enter BIOS and enable
‘
Case Open Detect
’
