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AM3352: Power dissipation

Cris Qi
Intellectual 835 points

Part Number: AM3352

Dear TI team，

We are optimizing the product Power dissipation based on the AM335X platform. The information I found from the TI official website is "AM335X Low Power Design Guide. PDF", please see the attachment.

When I operate according to the attached document (hardware platform: BeagleBone Black), I have the following questions, please help to check.

1. The power dissipation listed in the attached document is based on am335x-evm-powersave.dtb, but I did not find this DTB file in the official SDK

2. When I tested am335x-evm.dts, I found that the power consumption was not in line with that in the attachment. For example, in the Networked OS Idle test case, the data given in the document was about 498mW, but the data measured by me was about 1.2w, which was quite different.I suspect I'm using the wrong device tree, but I can't find the DTS given in the documentation.Excuse me, is my method wrong?Or is there something else you need to do in addition to the document operation steps to achieve the power consumption given in the document?

AM335x EMIF Tools.pdf

  • 0
    TI__Guru** 108210 points

    Hello Cris,

    I do not think am335x-evm-powersave was included in any Processor SDKs.

    In the AM335x Low Power Design Guide, please see "Appendix A" for the difference between am335x-evm.dts and am335x-evm-powersave.dtb as of Processor SDK 3.0.1. Note that am335x-evm.dts may have changed in more recent SDKs. There will also be differences between am335x-evm.dts and am335x-boneblack.dts. The section "Example Low Power Use Cases" also lists details about what OPP setting is used and which peripherals are disabled.

    Feel free to reply with follow-up questions,

    Nick