mITX-SKL-H – User Guide, Rev.1.1
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Signal Description
Signal
Description
TXn+, TXn-, RXn+,
TXn-, Dn+, Dn-
Differential pair works as serial differential receive/transmit data lines.
(n= 2,3)
VBus
5 V supply for external devices. VBUS is supplied during power-down to allow wakeup on
USB device activity. Protected by a 1A current limiting IC covering each of the USB port.
7.3.2.
USB Port 3 and USB Port 4 (J5)
USB port 3 and USB port 4 support USB2.0 and are located on the stacked USB/LAN connector J5.
Table 8: Pin Assignment USB Port 3 and USB Port 4 (J5)
Pin
Signal
Type
Note
Top
8
GND-
PWR
7
D6+
IO
USB 2.0 differential pair (+)
6
D6-
IO
USB 2.0 differential pair (-)
5
VBus
PWR
Bottom
4
GND-
PWR
3
D7+
IO
USB 2.0 differential pair (+)
2
D7-
IO
USB 2.0 differential pair (-)
1
VBus
PWR
Signal Description
Signal
Description
Dn+, Dn-
Differential pair works as serial differential receive/transmit data lines.
(n= 6,7)
VBus
5 V supply for external devices.
VBUS is supplied during power-down to allow wakeup on USB device activity.
Protected by a 1A current limiting IC covering each of the USB port.
