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AM3517 Low Power Sleep

Justin Forrester
Expert 1015 points
Other Parts Discussed in Thread: AM3517

I have been reading in the AM3517 RTM and in section 3.3.2.3 it details 14 different power modes that the module can be safely placed into.  However, I am having difficulty determining which register(s) need to be modified in order to reach these states.  My goal is to write a program which will turn off components and place the processor in a very low current draw sleep state.  Any help would be greatly appreciated.

Thanks!

  • 0
    TI__Genius 16690 points

    Hello Justin,

    From your other post, I think you are using Linux PSP and commands to put the processor in sleep described in the PSP user guide. The sequence to put AM35x in the lowest power standby mode has been already implemented in the Linux PSP, so most likely your processor is already in the lowest power status in the suspend. I think other things you can do is to make sure that pad configurations are optimized for your system and the other ICs on the board are also in the lowest power status.

  • 0 in reply to kshin
    Expert 1015 points

    Yes, I am using the Linux PSP and the sleep procedure described in the user guide. My pad configuration is minimal at this stage (MAIN_BATT_IN getting 5V, all GND lines connected, and UART3 tx/rx).  Are there any pad changes you would suggest which would impact the power consumption?  Can you advise me or direct me to documentation concerning the power status of other ICs on the SOM module?

    Thanks!

  • 0 in reply to Justin Forrester
    Intellectual 310 points

    Hello,

    Logic PD release their new Wattson software for the AM3517 EVM today which will help you see actual power consumption across all power rails on the CPU and SOM design.This might help you see which domains you are actually entering.  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