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aswath
Associate
Dec 7, 2023 12:25 AM UTC
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Good options to store public key in stm32h753

Hi,

 I am using a stm32h753 controller for my project, in which I need to store public key which could be updated during runtime. Is there any way I could store it inside the controller securely? Also do the stm32h753's flash has OTP? I could not find one in the reference manual.

Aswath

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TDK
TDKBest answer
Dec 7, 2023 1:14 AM UTC

The only non-volatile memory available on that chip is the flash. You can store it in a flash page, assuming you have one to devote to that. No OTP on this chip.

 

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4 replies

TDK
TDKBest answer
Dec 7, 2023 1:14 AM UTC

The only non-volatile memory available on that chip is the flash. You can store it in a flash page, assuming you have one to devote to that. No OTP on this chip.

 

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    aswathAuthor
    Associate
    Dec 7, 2023 3:56 AM UTC

    Thanks @TDK for the quick reply.

    aswathAuthor
    Associate
    Dec 7, 2023 4:17 AM UTC

    Page 25 says 2KB of user option bytes. Can this be used in someway? I couldn't find memory map address or APIs regarding this.

    Thanks
    Datasheet - STM32H753xI - 32-bit Arm® Cortex®-M7 480MHz MCUs, 2MB flash, 1MB RAM, 46 com. and analog interfaces, crypto
    aswath_0-1701922562183.png

     

    TDK
    TDK
    Dec 7, 2023 2:38 PM UTC

    No, they can't be used and are not user accessible. The datasheet should be changed as it's misleading.

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