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STM32F373CCT6 USB-CDC

AnthonyHu0730
Associate

‎2025-06-11 12:37 PM

I am currently using CUBE MX to set up the USB-CDC function of STM32F373CCT6, but I can't find the VBUS pin. I am using the onboard power supply, and I don't know if I need to use VBUS. If there is a design example for reference, it would be very grateful.

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TDK
Super User

‎2025-06-11 2:18 PM

There is no dedicated VBUS pin on the STM32F373CCT6. You shouldn't need it.

If your device is bus-powered, there is no need to monitor VBUS.

If your device is self-powered, bring VBUS to any GPIO and monitor it. When it's present, initialize USB. When it disappears, de-initialize USB.

If you feel a post has answered your question, please click "Accept as Solution".
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