Ultra96v2,pynqv2.5,usb3320 can not used

Hello,I use ultra96v2,and I removed the usb5744 USB hub from the development board usb1 because I only wanted to use USB2.0 function (I want to imitate and make my own board). I connect the DP and DM of USB 3320 to USB 2.0 interface, but I can’t recognize the U disk. I’ve described it in detail here. Is there a problem in the image of pynq?


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So,I want to know if Ultra96-pynq can use USB2.0 only? Thank you. And I see this, but I can’t access this u-boot fix.