How to configure/use usb2.0 interface in usb 3.0 port of LS1020A device

[infanneraysh]

We are using LS1020A processor in our design. USB ports available in the device are 1x USB 3.0 and 1x USB2.0 ULPI. We would like to use USB 2.0 interface alone for internal communication.

Is it ok to use USB_DP and USB_DM signals of the USB 3.0 port as such ?

Is there any configurations needs to be taken care for using USB 2.0 signals from USB 3.0 port ?

Thanks in advance for the support.

[andrei_skok · Accepted solution]

It is possible to use the LS102A USB 3.0 controller to connect to a USB 2.0 device.

To configure the LS102A USB 3.0 controller into USB 2.0-only mode set USB_GHWPARAMS3[DWC_USB3_SSPHY_INTERFACE]=0.

Have a great day,
Fedor

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