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GA-M55S-S3 Motherboard - 26 -
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16) F_ USB1 / F_USB2 / F_USB3 (Front USB Connector)
Be careful with the polarity of the front USB connector. Check the pin assignment carefully while
you connect the front USB cable, incorrect connection between the cable and connector will make
the device unable to work or even damage it. For optional front USB cable, please contact your
local dealer.
10 9
21
1
9
2
10
17) F1_1394 / F2_1394 (Front IEEE 1394 Connector)
Serial interface standard set by Institute of Electrical and Electronics Engineers, which has features
like high speed, highbandwidth and hot plug. Be careful with the polarity of the IEEE1394 connector.
Check the pin assignment carefully while you connect the IEEE1394 cable, incorrect connection
between the cable and connector will make the device unable to work or even damage it. For
optional IEEE1394 cable, please contact your local dealer.
Pin No. Definition
1 Power (5V)
2 Power (5V)
3 USB DX-
4 USB Dy-
5 USB DX+
6 USB Dy+
7GND
8GND
9 No Pin
10 NC
Pin No. Definition
1TPA+
2TPA-
3 GND
4 GND
5 TPB+
6 TPB-
7 No Pin
7 Power (12V)
8 Power (12V)
10 GND