• State
  • Locked Locked
  • Replies 7 replies
  • Subscribers 83 subscribers
  • Views 1661 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Piccolo power consumption

Mark Flamer
Intellectual 610 points

I really like the C2000 architecture. I'm curious how power efficent it is compared to something like the ARM Cortex. Like for example the MSP432 vs. a comparable Piccolo like the TMS320F2806x. I have a low power budget on a project coming up and would rather stick with the piccolo if they are comparable. Anyone have any experience or metrics they can share? Thanks. 

 

  • 0
    Guru 192875 points
    Hi Mark,

    You can refer the F28069 datasheet for detailed electrical specs. Go through Section 5.6 and subsections 1&2.
    My opinion... C2000 devices are super high performing but power hungry devices. You can check the specs and decide yourself and do share in your thoughts.

    Regards,
    Gautam
  • 0 in reply to Gautam Iyer
    Intellectual 610 points
    Thanks for the reply. I see the current consumption table in the data sheet. Looks like F28027 burns about 75-90mA at 60Mhz depending on which peripherals you have on. Compared to the new MSP432 with a Cortex M4F at 48 Mhz which draws about 8mA, you are correct the C2000 looks very power hungry. Please correct me if my math is wrong. I also concider the C2000 to be around twice as powerful as the ARM for certain algorithms, being able to perform a load and ALU op in a single cycle. So if we normalize in ARM MIPS, 60*2 = 120mips/80mA = 1.5mips/ mA vs. 48/8 = 6mips/mA. Looks like MSP432 is around 4 times as efficent. Again please correct me if I'm wrong.......I want to be.
  • 0 in reply to Mark Flamer
    Guru 192875 points
    Your observations are pretty much correct but you can't compare the efficiency of MSP432 & C2000 directly as C2000 controllers are very specific for certain applications. They've very specific designed libraries and math that you won't find elsewhere.
  • 0 in reply to Gautam Iyer
    Guru 30330 points

    Mark,

    Gautam is correct. The MSP430 line is developed for low power consumption applications while the C2000 is targeted towards high performance control applications. 

    You are on the right track with your selection process. You will need to consider what your true power budget is, and what performance/operations you will need to execute. Which is more important? If consumption is the most important, you might pick up an MSP430 launchpad to evaluate if it is capable of meeting your performance requirements. The F28069 launchpad is available for you to do the same!

    Good Luck,

    Mark

  • 0 in reply to Mark Labbato
    Intellectual 610 points
    I've been looking at other architectures that seem comparable to the C2000, with a focus on power consumption. The Blackfin devices seem more conservative than the C2000. But, I also havent had the time to do a complete comparison. The C2000 seems pretty power hungry in general compared to most other devices. Hopefully there will be some new production runs soon with a new process that results in more efficency. Or, being that I'm not an expert in this market there could be something I'm missing. Anyway that for the help. I really do think the C2000 is a nice architecture.
  • 0 in reply to Mark Flamer
    Guru 192875 points

    Hi Mark,

    Actually in Power Electronics field which mainly consists of converters and motor drives... MCU Power consumption is not the important factor to be considered :) Power consumed by C2000 mcu is 1th part of the 1000-10000 parts of the loses in the system. Hence we all keep trying to reduce the converter loses to increase the efficiency...So mcu power consumption hardly matters!

    Regards,
    Gautam

  • 0 in reply to Gautam Iyer
    Intellectual 610 points
    Your right, nit picking over a few mW is silly when talking about 3 phase AC motors. ;-) I'm looking for a hybrid MCU-DSP architecture for uses other then power systems, maybe C2000 is not the correct family.