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[FAQ] TDA4VM: J72E : How to determine if this is a GP or HS device

Part Number: TDA4VM


How to determine if this is a GP or HS device,Thank you for your help.

Best regards


  • Hi,

    Please set the dip switch settings as below:

    SW8: 00000000

    SW9: 01110000

    Connect to MCU UART port. If you are using J721e-EVM then that is micro-USB port below the Main UART. connect to the second instance that enumerates.

    You will see characters like below: 01000000011a00006a3776636c00000000000000475020200200010002000100C

    Typically 64 character on a GP device & on HS you will see many more characters:


    Around 400 Characters. That is a quick way to distinguish GP vs HS.

    Best Regards,

  • Hi Keerthy

    This method we know, what I want to know is how the code knows(for example read registers or other methods).

    Best regards,

    Huai hui

  • Hi,

    Even for the code to execute you will need to know before hand that you need to sign binaries for HS & unsigned binaries
    to boot with GP. My question is even if you are not booting anything How do you plan to look at registers?

    What is your use case where in you will need to check the HS Vs GP dynamically?

    - Keerthy