CEB94011 COM Express
TM
Type 6 Development Baseboard
Board and Pin Assignments
15
2.5.3
Front Panel Connector (CN3)
ATX Power Supply ON
Pin 1 and Pin 2 connect to switch button. If switch button turn on, it means ATX power
supply forcing to turn on state. Otherwise, system will control ATX power supply state.
Power LED
Pin 4 connects anode(+) of LED and pin 3 connects cathode(-) of LED. The power LED
lights up when the system is powered on.
Power On/Off Button
Pin 5 and 6 connect the power button on front panel to the CPU board, which allows
users to turn on or off power supply.
System Reset Switch
Pin 7 and 8 connect the case-mounted reset switch that reboots your computer without
turning off the power switch. It is a better way to reboot your system for a longer life of
system power supply.
HDD Activity LED
This connection is linked to hard drive activity LED on the control panel. LED flashes
when HDD is being accessed. Pin 9 and 10 connect the hard disk drive to the front panel
HDD LED, pin 9 is assigned as cathode(-) and pin 10 is assigned as anode(+).
Pin
Signal
Pin
Signal
1 GND
2 ATX_PSON-
3 GND
4 PWR
LED
5 GND
6 PWR
ON
7 GND
8 RESET
9
HDD Activity LED-
10
HDD Activity LED+
