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AM3517 power consumption

Ali Movahedi
Intellectual 860 points

Other Parts Discussed in Thread: AM3517, AM3703, OMAP3503

 

 

Hello,

Does the AM3517 like the MSP430 runs in different mode (LPM0, LPM1, LPM2 etc.)  What is AM3517  lowest power consumption to keep it alive. 

If I want to interface the MSP430 with the AM3517 and having the MSP430 as a master.  Can MSP430 writes directly to the Am3517 or we need to have a dual port memory that both have access to it.


Thanks,

Ali.

 

 

  • 0
    TI__Mastermind 44306 points

    Ali,

    AM3517 power consumption depends a lot on peripheral use and software activity. You can find a power estimation sheet in the product folder on the web.

    However if you are looking for battery operation and more low power modes and control you might have to look at the OMAP3503/15 or the AM3703/15. They have a more sophisticated power architecture.

    For interfacing MSP430 you could either use one of the serial interfaces or the parallel GPMC. Depends on your requirements.

    Regards.

  • 0 in reply to Frank Walzer
    Intellectual 860 points

     

    Hi Frank,

    I am currently using MSP430Fxx for our various design.  Recently we are planning to design with a TFT LCD.  Since MSP430is slow for the TFT display we decided to run our algorithem in MSP430 and for the display purpose to use an ARM.  This means that MSP430Fxx will send all the information to ARM to display.  To do so I thought it would be a good idea if I could use a portion of the ARM to be accessed by both micro like a dual port memory.  Would you agree by the idea?  If so would it be possible to transfer the info to the ARM from MSP430xx  by a DMA or else? 

    I am also looking to find out when the ARM is at rest just sending the info to a display (RGB) and doing nothing else how much current would it consume?  I would like to know when the ARM is in sleep mode not even sending info to the display  (waitting for an interrupt to wake up) how much current would it consume.

    High regards,

    Ali.

     

  • 0 in reply to Ali Movahedi
    TI__Mastermind 44306 points

    Hi Ali,

    your design idea is still not clear to me... you only need the AM3517 as a display subsystem? However it shouldn't consume the majority of power in your design. That could be tough as the MSP430 usually has very low power consumption compared to Cortex-A8 devices... Just look at the frequencies the devices are running at usually.

    I can understand if you want to stick with MSP430 and re-use any software. But a Cortex-A8 device has a lot more performance to also run your algos.

    However we also have other devices that may better suite your needs. E.g. AM18xx can also drive displays up to 800x600 resolution. And OMAP3 has more power management granularity than AM35xx. So depending on your overall system requirements their might be better options. And finally you might use our power estimation tools to compare power consumption of different devices. We do not have any data readily available that is according to your use case. As every customer has a different use case we can only help with tools here.

    Anyway I suggest you contact your TI or distributor FAE to get into a discussion on defining the future architecture of your designs as it may be more practical than doing this on a public forum. :-)

    Regards.

  • 0 in reply to Frank Walzer
    Intellectual 310 points

     


    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.  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

    -K