FDCAN bootloader for STM32H750VB?

[DBign.1]

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

[KDJEM.1 · Accepted solution]

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

[DBign.1]

Ok, thank you very much for your answer.

[Javier1]

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

@DBign.1 Those pins dont exist right?

[Javier1]

Same problem, different mcu
FDCAN ROM bootloader pins for stm32H743ZI

[Andrew Neil]

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@Javier1 wrote:

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

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

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@Javier1 wrote:

@DBign.1 Those pins dont exist right?

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

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

[Javier1]

if you go look into AN2606 youll find there is supposed to be a canbus bootloader for this mcu

[Andrew Neil]

Yes, looks like AN2606 makes some sweeping generalisations - which aren't always true.

My reply in your other thread:

https://community.st.com/t5/stm32-mcus-products/fdcan-rom-bootloader-pins-for-stm32h743zi/m-p/762452/highlight/true#M270763