23
Installing the Motherboard
Please make sure that the USB cable has the same pin assignment as
indicatged above. A different pin assignment may cause damage or system
hang-up.
USB3~4: Front Panel USB headers
The motherboard has four USB ports installed on the rear edge I/O port array. Additionally,
some computer cases have USB ports at the front of the case. If you have this kind of case,
use auxiliary USB connector to connect the front-mounted ports to the motherboard.
1 USBPWR Front Panel USB Power
2 USBPWR Front Panel USB Power
3 USB_FP_P0- USB Port 0 Negative Signal
4 USB_FP_P1- USB Port 1 Negative Signal
5 USB_FP_P0+ USB Port 0 Positive Signal
6 USB_FP_P1+ USB Port 1 Positive Signal
7 GND Ground
8 GND Ground
9 Key No pin
10 USB_FP_OC0 Overcurrent signal
Pin Signal Name Function
COM2: Onboard serial port header (optional)
Connect a serial port extension bracket to this header to add a second serial port to your
system.
1 NDCDB Data carry detect
2 NSINB Serial Data In
3 NSOUTB Serail Data Out
4 NDTRB Data terminal ready
5 GND Ground
6 NDSRB Date set ready
7 NRTSB Request to send
8 NCTSB Clear to send
9 NRIB Ring Indicator
10 KEY Key
Pin Signal Name Function
SPDIFO1: SPDIF out header
This is an optional header that provides an S/PDIF (Sony/Philips Digital Interface) output
to digital multimedia device through optical fiber or coaxial connector.
Pin Signal Name Function
1 SPDIF SPDIF digital output
2 +5VA 5V analog Power
3 Key No pin
4 GND Ground
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