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UCD90160A: Possible to only store/record the first fault, and ignore others until SW clears the initial fault?

Part Number: UCD90160A

During forced fault events (part of testing during development), I get my fault source recorded correctly, but our programmed response to the fault usually results in other power supply rails (slaves) getting shut down, and additional faults are subsequently recorded for those events as well.  It makes looking through the fault logs more confusing, as all these faults often have the same timestamp.

 Anyway… Is it possible to store/record only the first fault seen, and ignore recording other faults until SW clears the initial one?

  • Hi Pual,

    It is weekend now. Our engineer will support you next Monday.

    Thanks
    Qian
  • Hello

    The requested feature is not supported. But there are other ways to work around.

    1. If the first fault is always on the fixed rail. You can only enable the fault logging for the fixed rail and disable the fault logging for the rest rails

    2. If the first fault could be on any rails,. For each rail, you can set the remaining rails as fault shutdown salve of the given rails . At the fault response of the given rail, set the action to shutdown immediately. In this way, when the given rail has UV fault, device will shutdown the given rail and it’s slave rails but only log the UV fault of the given rail. Therefore there is only one fault logged.

    Hope this helps.

    Regards

    Yihe

  • I appeared to have success with suggestion #2.  However, will all faults on the slave rails no longer be logged, or only UV faults?  I ask because a I have a rail that goes OV during shutdown and it still shows up in the logs.

    Also, I still see GPI faults that show up after a power rail fault.  Is there a way to disable GPI faults from being recorded once the first power rail fault has occurred?  Perhaps a setting related to GPI Off Dependencies?

  • Hello

    OV fault is not blocked since it is not right to have OV fault during the shutdown, that's why device reports.

    The fault logging can be either disable or enable. it does not support to log the fault based on the other conditions.

    If the GPI is relate to the POWER_GOOD of the rails, then it is expected to see GPI de-asserted when there is faults on rails.

    if this is the case, you can disable GPI fault log since the voltage is also monitored.

    Regards

    Yihe

  • Hello
    I haven't heard from you and assume that the issue has been solved. Please reply here if you need further helps.
    Regards
    Yihe
  • I'm hesitant to disable the GPI fault log (and thus not record any events for those pins), as I still want to record faults related to the GPIs that are unrelated to a fault on the power rails.

    It sounds like I either get everything or nothing.  Is that correct?

  • Hello

    Each GPI has its own bit to disable or enable log. They are flexible to configure individually.
    You can disable the fault logging on those GPIs that are associated with power rails while keeping the rest GPIs.
    Will these solve your issue?
    Regards
    Yihe