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write/erase cycles of PICCOLO

sunil barot
Intellectual 580 points

Has anybody noticed that all the PICCOLO processors have very low "minimum" on flash endurance (as low as 100). That is really a show stopper for me unless my interpretation is incorrect.

I interpete it as follows.

TI does not guarantee write/erase operation after you have erased it 100 times.

What is the reason for such a low value?

  • 0
    Genius 5170 points

    I am sure TI folks will reply to your question but I am curious to know more about your application - is it possible to share information about your system? Also, what kind of write/erase cycles you need for your application?

     

     

  • 0 in reply to Arefeen
    TI__Expert 5340 points

    Sunil,

    The endurance specification across the TMS320F28xxx devices are 100 cycles Min./ 1000 cycles Typ. This specifies that typically 1000 cycles will be seen but cannot be guaranteed for every part across process/voltage/temperature. 100 cycles are guaranteed.

    Personally, I have never seen a chip that has only been able to achieve 100 cycles. I myself have had the same chip in one of my development boards for the past 2 years and have programmed well over 100 cycles.

    We are currently in the final stages of new write/erase characterization of the flash. At the current time there is no new limit set but it will be well above 100 cycles. We also do not have a set timetable for this but it could be finalized within weeks.

    Regards,

    Tim Love

  • 0 in reply to Tim Love
    TI__Guru** 119500 points

    sunil,

    We have been running flash endurance qualification and will soon update the datasheets for all F28xx devices, likely to 50k TYP.

    Can the show go on?  [:)]

     

  • 0 in reply to ChrisClearman
    Intellectual 580 points

    Thank you Tim and Chris, I am feeling much better now. I had a quesion on the accuracy of ADC which I have raised in another area of the forum addressed to Tim.

  • 0 in reply to Arefeen
    Intellectual 580 points

    Arefeen,

    Well the application is a typical industrial control. I would think that for any industrial application this days it is expected that the program on micro controller would be updated several times in the field and it is rarely monitored how many times a system is updated in the field. With that in mind 100 is a very low number.

    sunil

  • 0 in reply to ChrisClearman
    Guru 99415 points

    Has this qualification completed? I'm confident that the number will be higher

    than the 100/1000 in the Data Sheet, but I'd feel better actually reading it.

  • 0 in reply to Bruce McKenney
    TI__Guru** 119500 points

    Bruce,

    If you are asking about Piccolo F2803x devices, you probably aren't seeing it because the Datasheet has not gone to production yet (this month).  You can note the change to all the other F28x devices in production already, including Piccolo F2802x http://focus.ti.com/lit/ds/symlink/tms320f28027.pdf

    20k MIN, 50k TYP