78 Chapter 5
USB3/USB4: Front Panel USB Connectors
The mainboard has two 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 mainboard.
NOTE: Please make sure that the USB cable has the same pin assignement as indicated above. A
different pin assignment may cause damage or system hang-up.
COM2: Onboard Serial Port Connector
Connect a serial port extension bracket to this header to add a second serial port to your system.
Pin Signal Name Function
1 VREG_FP_USBPWR0 Front Panel USB Power
2 VREG_FP_USBPWR0 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 1Positive Signal
7 GND Ground
8 GND Ground
9 KEY No Pin
10 USB_FP_OC0 Overcurrent Signal
Pin Singal Name Function
1 NDCDB Data Carry Detect
2 NSINB Serial Data In
3 NSOUTB Serial Data Out
4 NDTRB Data Terminal Ready
5 GND Ground
6 NDSRB Data Set Ready
7 NRTSB Request to Send
8 NCTSB Clear to Send
9 NRIB Ring Indicator
10 Key Key
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