ECS A790GXM-A, Manual, Page: 24 / 88

20
Installing the Motherboard
F_USB1~3: Front Panel USB headers
The motherboard has six USB ports installed on the rear edge I/O port array. Addi-
tionally, 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.
Please make sure that the USB cable has the same pin assignment as
indicated above. A different pin assignment may cause damage or
system hang-up.
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
US USB Port 0 Positive Signal
6
US USB Port 1 Positive Signal
7
GND Ground
8
GND Ground
9
Key No pin
10
USB_FP_OC0 Overcurrent signal
Function
Pin Signal Name
SPDIFO: 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.
F_AUDIO1: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone and line-
out ports for easier access.
Pin Signal Name Function
1
PORT 1L
2
AUD_GND
3
PORT 1R
4
PRESENCE#
5
PORT 2R
6
SENSE1_RETURN
7
SENSE_SEND
8
KEY
Pin Signal Name
9
PORT 2L
10
SENSE2_RETURN
Pin Signal Name
2
+5VA 5V analog Power
3
Key No pin
4
GND Ground
Pin Signal Name Function
1
SPDIF SPDIF digital output