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TMS320F28386D: Fusa: Test for dignostic

W Z
Expert 2480 points

Part Number: TMS320F28386D

Functional Safety Manual for TMS320F2838x Real-Time Microcontrollers

Show the usage of each safety features, take PIE3 for example, from my understanding, it shall be Test for diagnostic.

But TI classify it as diagnostic.

  • 0
    TI__Guru 54945 points

    If you're testing regular PIE operation (like forcing an interrupt at the peripheral level and ensuring it is serviced correctly) I don't see what would make that a test for diagnostic. If you're doing a functional test of the PIE double SRAM comparison, that is a test for diagnostic, but that's what PIE6 is describing, not PIE3.

    Whitney

  • 0 in reply to Whitney Dewey
    Expert 2480 points

    Thanks Understood.  

    One following question: Does the test for diagnostic mean that shall do the fault injection in the startup phase,  prove the mechanism work properly then recover it?

  • +1 in reply to W Z
    TI__Guru 54945 points

    Right. To use PIE6 I mentioned above as an example, there is a way to purposefully create a mismatch between the regular vector table and the duplicate. You can then force a vector fetch from that location where you created the mismatch and the confirm that the correct error handler routine got called as a result.

    Whitney