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AM1808 power down modes current draw

Nathan Zuber
Prodigy 90 points
Other Parts Discussed in Thread: AM1808

Does anyone have any information on how much current various modules are supposed to draw when they are configured to be powered down?

In particular, I need information on current drawn from:

1.2V rail for internal RAM, PLLs, and USB core.

1.8V rail for USB 1.8

3.3V rail for USB and GPIO banks when not moving.

Numbers don't have to be exact.  Approximate numbers would be very helpful.

Thanks,

Nathan

  • 0
    TI__Expert 8785 points

    Nathan,

    The lowest power down state that you can achieve on the AM1808 device is deepsleep mode.  Below are some deepsleep power numbers

    • At 1.0V CVDD and 1.2V RVDD, power is between 6 to 8 mW
    • The combined USB power (USB_CVDD, USB*_1v8, USB*_3v3) in deepsleep should be between 1 to 2 mW
    • PLLs in deepsleep mode is neglible.  However, if running just out-of-reset, the PLLs in disable and power down mode should consume about 1.5mW each.
    • On IOA, IOB, and IOC rails, we've seen a total power as low as 2.5mW (at 1.8V).  This is also with all peripherals clock gated via PSC.  However, the power can vary greatly depending on the pull-up and pull-down configurations on the board.

    - Christina

  • 0 in reply to clam
    Intellectual 995 points

    Dears:

    I am trying to understand how AM1808 can be put into lowest power consumption; while still be able to receive Ethernet/internet calls. so to wake/work fully when such call/request comes in and then go back to very low power mode. Any ideas would be very appreciated. thanks in advance.

  • 0 in reply to asad1
    Intellectual 995 points

    This last post is discussed in a different thread. so please ignore this last one as a mistake in placement. thanks.

  • 0
    Intellectual 310 points

    Nathan,

    If you are doing a very low power design, you should be aware Logic PD released their new Wattson software for the AM1808 EVM which will help you see actual voltage, current, and power consumption across all power rails on the CPU and SOM design. 

    There is an adapter required to connect to the PC available from this website: http://createnewstuff.webs.com/breakoutboardwattson.htm


    The Logic PD software is available from here: http://www.logicpd.com/wattson

    -A