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Is there any diagnosis mechanism for The RAM of N2Het basis on TMS570LS3137

user4267432
Prodigy 200 points

We got a problem about that we have not enough mechanism to protect the ram of n2het getting a high(up to 90%) diag coverage.

Now,we only use parity check to diagnose the ram, but it not enough. And also, we need a dynamic mechanism to diagnose the ram. Is there any good method if we want to get a high diag?

  • 0
    TI__Mastermind 49120 points
    The parity check is the only available "online diagnostic" for the N2HET RAM. It allows the application to generate an interrupt to the CPU whenever a parity error is detected. The application can also choose to drive the nERROR pin when this error is detected.

    When an interrupt is generated on detecting a parity error, the application could trigger a self-test on just the N2HET RAM that reported the error. The memory self-test routines provide a good coverage of various types of memory faults. This would allow the application to determine whether the fault in the memory is a permanent fault or a transient fault. The further application response can then be determined as per your requirements.

    Regards,
    Sunil