Re: $skew/$timeskew

From: Yonghao Chen (yonghao@cadence.com)
Date: Thu May 05 2005 - 06:08:41 PDT

  • Next message: Yonghao Chen: "Re: $timeskew"

    In the case where timing check event occurs before the limit,
    the $skew check will not turn dormant, and it will continue
    reporting violations for timing check events after the limit.

    I'd think $timeskew in the event mode should behave the same.
    But in timer based mode, $timeskew should turn dormant upon
    the first timing check event within the limit.

    Regards,

    -Yonghao

    >
    > Yonghao,
    >
    > In $skew, if there is a timestamp event and then a series of timecheck
    > events after expiration of the time limit, a violation is reported on
    > each such timecheck event.
    >
    > If a timecheck event occurs before expiration of the time limit,
    > a violation is not reported.
    >
    > What happens if there is a series of timecheck events, one or more
    > before expiration of the time limit and one or more after the time limit.
    >
    > Does $skew turn dormant after a timecheck event within the time limit,
    > or does it continue to check each timecheck event which follows the
    > timestamp event, even if there was a timecheck event before the time
    > limit expires?
    >
    > The LRM implies that $skew remains active even after a timecheck event
    > within the time limit ("$skew shall report timing violations for all data
    > events occurring beyond the limit after a reference event."), but I am
    > not sure that was the intent.
    >
    > Presumably, $timeskew in event based mode with remain active flag set
    > would work the same way.
    >
    > $fullcheck is different in any case, though.
    >
    > Thanks,
    > Shalom
    >
    > --
    > Shalom.Bresticker @freescale.com Tel: +972 9 9522268
    > Freescale Semiconductor Israel, Ltd. Fax: +972 9 9522890
    > POB 2208, Herzlia 46120, ISRAEL Cell: +972 50 5441478
    >
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    >
    >
    >

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