Configuration of VDD50USB and VDD33USB Pins When USB Functionality is Not Used

ManjuMulimani · ‎2024-09-30

Hello ST Community,

I am seeking guidance on how to properly configure the VDD50USB and VDD33USB pins on our STM32 device when we are not utilizing the USB functionality. The explanations provided in the datasheet and application notes are somewhat ambiguous and do not explicitly address the scenario where the USB functionality is not utilized.

Could anyone provide detailed instructions or best practices for configuring these pins in such cases?

Thank you!

FBL · ‎2024-10-14

Hi @ManjuMulimani

Check this FAQ: Configuring the VDD50USB and VDD33USB pins on... - STMicroelectronics Community

I hope this would be helpful.

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

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View solution in original post

TDK · ‎2024-09-30

"connect VDD33USB to GND (saves some supply current), leave VDD50USB unconnected and make sure that the VDD33USB supply level detector is disabled."

Solved: STM32H745 - USB power pins - connect to VDD or Ope... - STMicroelectronics Community

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

FBL · ‎2024-10-14

Hi @ManjuMulimani

Check this FAQ: Configuring the VDD50USB and VDD33USB pins on... - STMicroelectronics Community

I hope this would be helpful.

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

I'm out of offce with limited access to my emails.
Happy New Year!