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

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

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infanneraysh
Contributor I

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.

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andrei_skok
NXP TechSupport
NXP TechSupport

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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andrei_skok
NXP TechSupport
NXP TechSupport

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

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

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