MANO520 Mini ITX Motherboard
14
Board and Pin Assignments
2.4.5
Front Panel Header (CN12)
The CN12 is a 7x2-pin (pitch=2.54mm) header for front panel interface.
Power LED
Pin 1 connects anode(+) of LED and pin 5 connects cathode(-) of LED. The power LED
lights up when the system is powered on.
External Speaker and Internal Buzzer
Pin 2, 4, 6 and 8 connect the case-mounted speaker unit or internal buzzer. While
connecting the board to an internal buzzer, please set pin 2 and 4 closed; while
connecting to an external speaker, you need to set pins 2 and 4 opened and connect the
speaker cable to pin 8(+) and pin 2(-).
Power On/Off Button
Pin 9 and 10 connect the power button on front panel to the board, which allows users to
turn on or off power supply.
System Reset Switch
Pin 11 and 12 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 13 and 14 connect the hard disk drive to the front
panel HDD LED, pin 13 is assigned as cathode(-) and pin 14 is assigned as anode(+).
Pin
Signal
1
Power LED+
2
SPK-
3
GND
4
BUZZER-
5
Power LED-
6
N/C
7
N/C
8
SPK+
9
PWR-
10
PWR+
11
RESET-
12
RESET+
13
HD LED-
14
HD LED+
