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LEdou.1
LEdou.1
Associate III
June 25, 2026
Solved

Disable Boot0 on STM32WL33

Hi, 

Is there a way to disable Boot0 on PA11 on STM32WL33 ? I can’t find any Bytes Option. 

The only thing I can find, is we can re map PA11 to another pin.

Thanks

Filippo_MalleoBest answer
ST Technical Moderator
June 29, 2026

Hello LEdou.1,

 

in the STM32WL33, BOOT0 is connected to PA10, not PA11. In any case, it cannot be disabled.

To enter the bootloader, PA10 must be high during a hardware reset. A power-on reset (POR) does not activate the bootloader.


BR,
Filippo

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2 replies

mƎALLEm
mƎALLEm
ST Technical Moderator
June 25, 2026

Hello,
STM32Wxxx are Wireless MCUs. This post needs to be posted in “STM32 MCUs Wireless” forum board.

I’ll move the post to the correct forum board

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
    Filippo_MalleoBest answer
    ST Technical Moderator
    June 29, 2026

    Hello LEdou.1,

     

    in the STM32WL33, BOOT0 is connected to PA10, not PA11. In any case, it cannot be disabled.

    To enter the bootloader, PA10 must be high during a hardware reset. A power-on reset (POR) does not activate the bootloader.


    BR,
    Filippo

    In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks
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