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USB2/USB3: 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 connectors USB2 and USB3 to
connect the front-mounted ports to the mainboard.
Pin
Signal Name
1
VREG_FP_USBPWR0
2
VREG_FP_USBPWR0
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
Note: 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.
SIR1: Serial infrared port
The mainboard supports a Serial Infrared (SIR) data port. Infrared ports allow
the wireless exchange of information between your computer and similarly
equipped devices such as printers, laptops, Personal Digital Assistants
(PDAs), and other computers.
Pin
Signal Name
1
Not assigned
2
KEY
3
+5V
4
GND
5
IRTX
6
IRRX
SMI1: System Management Interrupt
This connector is for use with SMI hardware interrupt power management.
Pin
Signal Name
1
-EXTSMI
2
GND
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
Not assigned
No pin
IR Power
Ground
IrDA serial output
IrDA serial input
Function
Sleep button
Ground
22
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