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AM2434: How to turn off unused R5 cores ?

Andrea Tessadri
Intellectual 567 points
Part Number: AM2434
Other Parts Discussed in Thread: AM2432,

I work on a custom board AM243x with the last SDK mcu_plus_sdk_am243x_08_02_00_31

We use just 2 R5 cores and we are wondering if it is possible to turn off the other 2 unused cores for power saving.

Thank you in advance

    Andrea

  • +1
    TI__Mastermind 27743 points

    Hi Andrea,

    If you are using TI bootloader, the unused cores will implicitly not enabled (not brought out of reset) as binaries/application images will be missing for those cores. You don't need to explicitly turn those off.

    If you want to explicitly turn off these cores, you can call power management APIs.  

    Regards,

    Prasad

  • 0 in reply to Prasad Jondhale
    Intellectual 567 points

    Thanks Prasad for your quick reply.

    We would need to be in the same conditions as per AM2432, so dual-core, not quad-core, even if we have an AM2434 SoC.

    Do you mean that preventing unused cores to come out of reset will be the same as having them completely disabled like in AM2432 ?

    I supposed they are still powered.

    So, in case I use PM API as per your recommendation, can I explicitly turn off power supply to those cores ?

  • +1 in reply to Andrea Tessadri
    TI__Mastermind 27743 points

    Andrea,

    Confirming with SW team, core will be in power off state if it is not explicitly brought out of reset by SBL. So you don't need to explicitly power it off.

    Regards,

    Prasad