ECS A990FXM-A, Manual, Page: 22 / 76

18
Installing the Motherboard
F_AUDIO: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone and line-
out ports for easier access.
F_USB1~2: Front Panel USB 2.0 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
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
CASE: Chassis Intrusion Detect Header
Short Chassis cover is removed
Open Chassis cover is closed
Pin 1-2 Function
This detects if the chassis cover has been removed. This function needs a chassis
equipped with instrusion detection switch and needs to be enabled in BIOS.
Unlike F_USB2 in this mainboard, F_USB1 supports EZ Charger technology (op-
tional), provides 3 times current than general USB port in off mode for USB devices.
It is useful and excellent, especially for the iPhone, iPad and iPod touch devices that
need a large amount of current for faster recharging within less time.