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DBign.1
DBign.1
Associate
November 4, 2022
Solved

FDCAN bootloader for STM32H750VB?

  • November 4, 2022
  • 3 replies
  • 2633 views

I use a STM32H750 chip and I would like to use the emdedded bootloader with the FDCAN1 interface. AN2606 specifies pins PH13 and PH14 for this version. However, the package I use (STM32H750VBT6 LQFP100) doesn't have these pins exported. Does it mean that there is no FDCAN bootloader option for the 100-pin package?

Thank you in advance for your answer,

Dorian Bignet

Best answer by KDJEM.1

Hello @DBign.1​ ​ and welcome to the Community :),

For STM32H750, you can activate the FDCAN bootloader with only by PH13/PH14 pins.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Kaouthar

3 replies

KDJEM.1
KDJEM.1Best answer
ST Technical Moderator
November 10, 2022

Hello @DBign.1​ ​ and welcome to the Community :),

For STM32H750, you can activate the FDCAN bootloader with only by PH13/PH14 pins.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Kaouthar

To give better visibility on the answered topics, please click on "Best answer" on the reply which solved your issue or answered your question.
Javier1
Javier1
Principal
January 16, 2025

What does that mean "you can activate the FDCAN bootloader with only by PH13/PH14 pins."?

@DBign.1 Those pins dont exist right?

hit me up in https://www.linkedin.com/in/javiermuñoz/
Andrew Neil
Andrew Neil
Super User
January 16, 2025
@Javier1 wrote:

What does that mean "you can activate the FDCAN bootloader with only by PH13/PH14 pins."?

It means that those are the only pins you can use - you cannot use any other pins.

 

@Javier1 wrote:

@DBign.1 Those pins dont exist right?

Which is, presumably, why the datasheet doesn't mention FDCAN as a bootloader option:

AndrewNeil_0-1737030723158.png

https://www.st.com/resource/en/datasheet/stm32h750vb.pdf#page=25

 

Similarly for the stm32H743ZI: 

https://community.st.com/t5/stm32-mcus-products/fdcan-rom-bootloader-pins-for-stm32h743zi/m-p/762443/highlight/true#M270761

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.
    DBign.1
    DBign.1Author
    Associate
    November 11, 2022

    Ok, thank you very much for your answer.

    Javier1
    Javier1
    Principal
    January 16, 2025

    Same problem, different mcu
    FDCAN ROM bootloader pins for stm32H743ZI

    hit me up in https://www.linkedin.com/in/javiermuñoz/
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