AXEL Lite SOM/AXEL Lite Evaluation Kit/Interfaces and Connectors/USB ports

From DAVE Developer's Wiki
Jump to: navigation, search
Issue Date Notes


First EVK release
2022/09/01 Correct second USB port mode description

USB ports[edit | edit source]

Description[edit | edit source]

SBCX provides two USB ports, one Host and one device:

  • J17 is a standard USB Host 2.0 Type A connector
USB Host connector

  • J18 is a micro-AB type receptacle for a USB device connection: this interface can operate in Device (peripheral) mode and - optionally - in Host mode

USB device connector

Signals[edit | edit source]

The following table describes the interface signals

USB Host[edit | edit source]

Pin# SOM Pin# Pin name Pin function Pin Notes
2 J10.202 USB_HOST_DN USB Host Data -
3 J10.200 USB_HOST_DP USB Host Data +
4 - DGND Ground

USB Device[edit | edit source]

Pin# SOM Pin# Pin name Pin function Pin Notes
6, 7, 8, 9 - USB_OTG_SH Shield
1 J10.186 USB_OTG_VBUS VBUS This pin can be powered (for Host mode) (*)
2 J10.196 USB_OTG_DN USB OTG Data -
3 J10.198 USB_OTG_DP USB OTG Data +
5 - GND Ground

Device usage[edit | edit source]

The USB Host port can be used under Linux for connecting USB peripheral devices: the related peripheral driver has to be integrated into the Linux kernel.

The USB Device feature can be easily tested using the Mass Storage Gadget driver. (*) This port can operate in Host mode using a proper BOM mount option. See the EVK schematics for more info