ECS 649-M2 Manual page 29

USB3~USB4: Front Panel USB connectors
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 the onboard USB connectors to connect the front-mounted ports to the motherboard.
Pin Signal Name
1
USBPWR
2
USBPWR
3
USB_FP_P0-
4
USB_FP_P1-
5
USB_FP_P0+
6
USB_FP_P1+
7
GND
8
GND
9
Key
10
USB_FP_OC0
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.
AUX_IN: Auxiliary In connector
This connector is an additional line-in audio connector. It allows you to attach a line-in
cable when your rear line-in jack is set as line out port for 4-channel function.
Pin Signal Name
1
AUX_L
2
GND
3
GND
4
AUX_R
COM2: Onboard serial port header
Connect a serial port extension bracket to this header to add a second serial port to your
system.
Pin Signal Name
1
NDCDB
2
NSINB
3
NSOUTB
4
NDTRB
5
GND
6
NDSRB
7
NRTSB
8
NCTSB
9
NRIB
10
KEY
Function
Front Panel USB Power
Front Panel USB Power
USB Port 0 Negative Signal
USB Port 1 Negative Signal
USB Port 0 Positive Signal
USB Port 1 Positive Signal
Ground
Ground
No pin
Overcurrent signal
Function
AXU In left channel
Ground
Ground
AXU In right channel
Function
Data carry detect
Serial Data In
Serail Data Out
Data terminal ready
Ground
Date set ready
Request to send
Clear to send
Ring Indicator
Key
Installing the Motherboard
23