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CC2510 flash corruption

Chris Murphy
Intellectual 830 points
Other Parts Discussed in Thread: CC2510

Dear Support,

Three hours into a temperature test from -40C to +85C, I lost communication with the UART at +85C. I then tried to restore serial communication at room temperature using several setups and applications , but was unsuccessful. Thinking the radio was damaged, I tried re-programmed the part. Programming was successful, and so was serial communication again. It seems as though the flash was corrupted. Do you have any ideas?

Thanks,

Chris

  • 0
    Intellectual 830 points

    Dear Support,

    It seems the reason for failure is directly related to high temperature. At +82C, the CC2510 appears to cycle in and out of a reset. At +84C the part appears to be completely powered off, no current draw at all. After the part cools back to near room temperature (~10min), the part resumes operation again. This is where I was mislead in the previous post, thinking it was flash corruption. The data sheet specifies -40C to +85C operating temperatures. 

    Any ideas?

    Thanks again,

  • 0 in reply to Chris Murphy
    Expert 1670 points

    That does seem odd. Can you output the internal temperature sensor's reading during the test? Perhaps the chip or another part on your board is heating up above 85C? 

    Also, can you monitor the reset line itself and power line(s) to see if they're going low?

  • 0 in reply to Chad Christensen
    TI__Expert 6825 points

    Hi Chris,

    I does seem odd...do you get several parts to behave as above or is it only one device?

     

    -Per

  • 0 in reply to Chad Christensen
    Intellectual 830 points

    Hi Chad,

    Yes, but now it doesn't do it anymore. I'll continue testing and revisit this issue if I see it again. I wonder if my board was flexing at the high temperature and returning when it cooled off. Thanks for the attention.

    ~Chris