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G
gilberto-falker
Associate II
September 16, 2025
Question

Ultra Low Power Application without USB - what to do with VDDUSB?

  • September 16, 2025
  • 4 replies
  • 331 views

Hi

 

We are working on a project based on the STM32U073CCT6. The USB interfaces is not need. How should I connect the VDDUSB pin in order to minimize tthe power consuption? Is it Ok to connect it do GND?

 

Br

Gilberto

4 replies

AScha.3
AScha.3
Super User
September 16, 2025

Hi,

read in ds...general/minimum working conditions.

->

AScha3_0-1758048396687.png

AScha3_1-1758048479654.png

 

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F
FBL
Technical Moderator
September 17, 2025

Hi @gilberto-falker 

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

It should 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.Best regards,FBL
Andrew Neil
Andrew Neil
Super User
September 17, 2025
@gilberto-falker wrote:

The USB interfaces is not need

The STM32U0 series Product Selector lists 12 models with no USB.

Could you use one of them?

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
G
gilberto-falkerAuthor
Associate II
September 17, 2025

Hi

Models without usb have less flash memory 

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