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J
JChristian
Associate
May 2, 2025
Solved

STM32L412KBU3 DFU

  • May 2, 2025
  • 2 replies
  • 638 views

Need some clarification on implementing the DFU functionality on STM32L412KBU3.

According to the note in AN2606 (page 350), it states: "VDDUSB IO must be connected to 3.3 V" however, on the STM32L412KBU3 (UFQFPN32) the VDDUSB pin does not exist.

Currently, VDD is powered by +1V8 on my application of the STM32L412KBU3.

Will I have any issues with DFU moving forward?

Best answer by STOne-32

Dear @JChristian ,

Powering VDD at 3.3Volts will be fine with USB and DFU .  I thought That impossible in your application as VDD =1.8V.

Let us know

Ciao

STOne-32.

2 replies

STOne-32
STOne-32
Technical Moderator
May 2, 2025

Dear @JChristian ,

In this case, you can not use USB for DFU and you can instead use others protocols. 


STOne-32

J
JChristianAuthor
Associate
May 2, 2025

To enable DFU do you suggest powering VDD with 3.3V or is DFU not available at all for STM32L412KBU3?

STOne-32
STOne-32Answer
Technical Moderator
May 4, 2025

Dear @JChristian ,

Powering VDD at 3.3Volts will be fine with USB and DFU .  I thought That impossible in your application as VDD =1.8V.

Let us know

Ciao

STOne-32.

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