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STM32H755-ZI Nucleo Board USB HS Configuration

alexfall
Associate

Hello.

I want to use USB HS with the STM32H755ZI-Nucleo Board. I am using the USB3300 from Waveshare as an external USB HS-PHY.

The USB3300 is connected to the ULPI Interface of the STM32 with the requiered 12 Signals. And the USB3300 provides a 60 MHz Clock.

My question now is, how do I configure the RCC correctly? Should I use HSE in bypass mode? Is the 60MHz from the USB3300 then correctly provided to the STM32?

Or do I need to solder a external oscillator with 25MHz that I use for the STM32 setup?

Unfortunately I can not find any information on High-Speed USB other then connect them to the ULPI.

I wanted to use a Clock Config like this:

0693W00000KbWHXQA3.png 

0693W00000KbWGLQA3.png 

Right now I thought I can use HSE as BYPASS Clock Source, but the USB Communication is not working.

So do I need to solder external Oscillator or is this Clock Config useable for USB HS?

Thanks in advance,

Alexander

1 REPLY 1

Hello @JulianSTMtreb​ ,

Take a look at this presentation. It might help you.

BeST Regards,

Walid