7
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
’
function. In this case if your case is removed, next time when you restart your
computer, a message will be displayed on screen to inform you of this.
2-2 Connectors and Headers
2-2-1 Rear I/O Back Panel Connectors
Rear IO Diagram
(1) KB/MS: PS/2 Keyboard & Mouse Connectors
The connectors are for PS/2 keyboard and PS/2 Mouse. The green one is PS/2
mouse port and the purple one is PS/2 keyboard port.
(2) USB30: USB 3.0 Port Connector
These USB 3.0 connectors are for user to connect USB 3.0 compatible devices
to the system board.
(3) HDMI: High-Definition Multimedia Interface
This point-to-point interface is for audio and video signals designed as a
single-cable solution for home theater and consumer electronics equipment.
(4) USB20: USB 2.0 Ports
The connectors are USB 2.0 connectors to connect USB devices to the system
board.
(5) VGA1: D-Sub 15-pin VGA Connector
VGA connector is the 15-pin D-subminiature female connector; it is for the
display devices, such as the CRT monitor, LCD monitor and so on.
LAN2
RJ-45 LAN Port
USB 3.0 Ports
VGA1 Port
COM1 Serial Port
HDMI Port
LAN1
RJ-45 LAN Port
PS/2 Mouse
Port
PS/2 Keyboard
Port
USB 2.0 Ports
