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The differecne between C6720 and C6722B

Genius 5785 points

Hello,

We'll use C6722B@200MHz in stead of C6720@200MHz. I think they're almost compatible and its difference is only the size of internal memory. How much power consumption does it increase due to the difference of memory size? Please give me information.

Regards,
Kazu

  • Hi Kazu,

    Thanks for your post.

    There is an app. note on the power consumption for C6722B &C6720 devices. I think, the power consumption would vary only at the internal logic, C6722 would consume 0.666 W where as, C6720 would consume only 0.559 W and other than this, CPU & IO power consumption would remain same for C6722 & C6720 devices. Please refer the app. report below:

    http://www.ti.com/lit/an/spraaa4b/spraaa4b.pdf (refer Table 1)

    There is a power estimation spreadsheet which you can download from the above app. report where in, kindly refer section 2 on using the power estimation spreadsheet and normally, the utilization, read/write balance, and bit switching require estimation and a good understanding of the user application to choose appropriate values.  Refer section 4.1 for the sample application to choose appropriate values from the app. report above.

    Refer the attached zip file for the power estimation spread sheet.

    /cfs-file/__key/communityserver-discussions-components-files/791/3365.spraaa4b.zip

    Thanks & regards,

    Sivaraj K

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  • Hello Sivaraj,

    Thank you for your reply. I seem this difference is due to the frequency between 200MHz and 250MHz. I tryed entering spreadsheet. The power consumption of internal logic on C6722@200MHz is 0.559W. It's same as C6720@200MHz. Their power consumptions are almost same, aren't they?

    Regards,
    Kazu

  • Hi Kazu,

    Thanks for your update.

    If you are evaluating through power estimation spreadsheet shared above, then it should be reliable.

    Thanks & regards,

    Sivaraj K

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    Please click the Verify Answer button on this post if it answers your question

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