TYAN THUNDER I7522 Manual page 22

Thunder i7520 / Thunder i75 20 R
3.1.12 - Front USB Connector (USB2, USB3 and USB4 )
Chapter 3: Board Installation
Front USB Header (USB2)
Function Pin#
Power 1
USB2- 3
USB2+ 5
GND 7
Key 9
USB3 and USB4
(USB Type A Vertical Connectors)
Pin# Function
1 Power
2 USB-
3 USB+
4 GND
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Pin# Function
2 Power
4 USB3-
6 USB3+
8 GND
Reserved
10