Atx 4 Pin 12V In Connector (Cn2); Front Panel Connector (Cn3) - AXIOMTEK SHB101 User Manual

SHB101 LGA775 SBC User's Manual
2.4.1

ATX 4 Pin 12V In Connector (CN2)

You can connect it to the ATX12V power supply for CPU Core Voltage.
Pin Signal
1 GND
2 GND
3 +12V
4 +12V
2.4.2

Front Panel Connector (CN3)

 Power LED
This 3-pin connector denoted as Pin 1 and Pin 5 connects the system power LED
indicator to such a switch on the case. Pin 1 is assigned as +, and Pin 5 as -. The Power
LED lights up when the system is powered ON. Pin 3 is defined as GND.
 External Speaker and Internal Buzzer Connector
Pin 2, 4, 6 and 8 can be connected to the case-mounted speaker unit or internal buzzer.
While connecting the CPU card to an internal buzzer, please short pins 2-4; while
connecting to an external speaker, you need to set pins 2-4 to Open and connect the
speaker cable to pin 8 (+) and pin 2 (-).
 ATX Power On/Off Button
This 2-pin connector denoted as Pin 9 and 10 connects the front panel's ATX power
button to the CPU card, which allows users to control ATX power supply to be power
on/off.
 System Reset Switch
Pin 11 and 12 can be connected to the case-mounted reset switch that reboots your
computer instead of turning OFF the power switch. It is a better way to reboot your
system for a longer life of the system's power supply.
HDD Activity LED
1.
This connection is linked to hard drive activity LED on the control panel. LED flashes
when HDD is being accessed. Pin 13 and 14 connect the hard disk drive to the front
panel HDD LED, Pin 13 assigned as -, and Pin 14 as +.
10 Board and Pin Assignments