Vbus +5V

[FAnag]

Hi

I plan to include the USB input of STM32F303 and am not willing to power up the board with the +5V of Vbus. The board will be supplied permanently with 3.3V. Is it necessary the connection of Vbus? If yes how i should connect it to the +3.3V Vdd of STM32?

Thanks

[Uwe Bonnes]

You need VBUS to detect USB-plutg/unplug.

[FAnag]

Thanks.

So i should use one of the many circuits i found in Google, e.g. this with the FET that is connected among +3.3V Vdd ---> Res 1.5K----> D+ input with its gate driven by the Vbus +5V ? Is that OK?

[Uwe Bonnes]

Look also at https://community.st.com/s/question/0D50X00009XkZZnSAN/is-vusb-requiredrecommended-for-selfpowered-stm32-usb-device