PCchips M921 Series, User Manual

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2: Mainboard Installation
USB2/USB3: Front panel USB headers
The mainboard has USB ports installed on the rear edge I/O port
array. Some computer cases have a special module that mounts
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 Pin Signal Name
1
3
5
7
9 VCC (+5V)
USBP2-N (port 2 -)
USBP2-P (port 2 +)
GND
Key pin 2
4
6
8
10
VCC (+5V)
USBP3-N (port 3 +)
USBP3-P (port 3 -)
GND
OC# (over current
detect)
LUSB1/LUSB2: Front panel USB headers
This mainboard has two additional USB ports installed on the
board that serve the same function as USB2/USB3 but has
different pinouts. If your USB connector match the pinouts below,
use USB1 or USB4.
Pin Signal Name Pin Signal Name
1
3
5
7
9 +5V
USB0-
USB0+
EMPTY
GND 2
4
6
8
10
GND
No pin
USB1+
USB1-
+5V
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