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AM3359 migration to AM438x or AM570x or AM65x

Yashodip Chaudhari2
Prodigy 155 points

Currently we are using AM3359x and we would like to migrate to higher series for better security features like TEE.

We just would like to know impact additional power consumption due to this up-gradation of processor (AM438x or AM570x or AM65x)

Because our product is battery operated product, and we would like to know impact on battery back time. There will not be any additional software and peripherals to be used. Only we will use security features inside the processor.

Kindly comment on additional power consumption due to higher series processor (AM438x or AM570x or AM65x)

  • 0
    TI__Mastermind 42545 points

    Hi Yashodip,

    Unfortunately we can't provide you with the impact since the power consumption depends on the application that you are running.  I suggest you download the power consumption models for each device and enter your use case to determine the power needed by each part.

    Regards, Bill

  • 0
    TI__Guru*** 125430 points

    While I agree with Bill that detailed power numbers will be application specific, I would like to offer a some general comments that might be helpful.

    1. The AM43xx family is in the same process node as AM335x.  Furthermore, Cortex A9 is modestly improved in performance over the Cortex A8.  If you were to migrate to AM43xx and keep your overall system functionality the same, I expect power consumption should be similar.

    2. Keep in mind that the AM43xx has 32-bit wide DDR3L interface, i.e. if you put down two x16 devices (e.g. increased memory) then you will increase your overall power.

    3. The AM43xx has some additional power saving modes like RTC+DDR.  I'm not sure if you can utilize that feature, but if so that might actually improve power consumption (i.e.  lower power / longer battery backup time).  Similarly, the OPP50 operating point on AM437x will operate with VDD_MPU = 0.95V.  This can result in a significant power reduction if you are able to utilize OPP50.  On AM335x we keep OPP50 at 1.1V due to the fact that the ROM code configures clocks for OPP100 (i.e. a reset would cause AM335x boot ROM to be out of spec if you ran OPP50 at 0.95V).

    4. AM57 and AM65 are both in 28nm process.  This is much harder to compare. Generally speaking I expect them to be higher performance and higher power when compared to AM3/AM4.  These would also be a much larger migration from a software perspective.

    In my opinion, if you're interested in adding high security capability, it definitely makes sense to consider migration to the AM43xx.

    Best regards,
    Brad

  • 0 in reply to Brad Griffis
    Prodigy 155 points

    Thanks for detail information...This has clarified my query