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5.12
USB ports
SBCX provides two USB ports, one Host and one OTG.
5.12.1
USB Host – J17
Fig. 25: USB host connector
J17 is a standard USB Host 2.0 Type A connector. The following table
reports the connector's pinout:
Pin #
SOM pin
#
Pin name
Function
Notes
1
J10.188 USB_HOST_VBUS
VBUS
2
J10.202 USB_HOST_DN
USB Host Data -
3
J10.200 USB_HOST_DP
USB Host Data +
4
-
DGND
Ground
5.12.1.1
Overcurrent limiter
USB Host port is protected from overcurrent conditions by an overcurrent
limiter, which allows for a 500mA current-limit threshold. It also offers
reverse voltage protection. The status of the overcurrent limiter can be
read with the following commands:
root@axel-lite:~# echo 94 > /sys/class/gpio/export
root@axel-lite:~# cat /sys/class/gpio/gpio94/value
0
December, 2019
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Summary of Contents for SBC AXEL
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