I am using USB_OTG_HS on STM32F437ZI. I am using the built-in FS PHY. Will it work without connecting the ID and VBUS?

[修新妻.1]

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[Sarra.S]

Hello

The ID pin is required when operating in Dual Role mode (in Peripheral or Host mode, it's not required) to detect the USB mode (Host or Peripheral) and configure the USB interface accordingly.

the Vbus on the other hand, is always required for proper USB operation, regardless of the USB mode to provide the power supply for the USB bus.

Hope that helps!

[修新妻.1]

Thank you for answering. Let me check one more thing. Even if NOVBUSSENS of OTG_HS_GCCFG is set to 1, is it necessary to connect the VBUS line?