We recommend you check your board schematics and layout with our AN70707 "Hardware Design Guidelines and Schematic Checklist"
Have you ensured the length matching and impedance requirements of differential pairs?
Hi,Nishant.The circuit board is designed according to the document “Hardware Design Guidelines and Schematic Checklist”. I upload some Screenshot.You can help me check it.Thank you very much.In additon,the firmware can work normal in HS or SS Speed mode on my development board.
SS wire length