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set_propagated_clock

Shivareddy
Shivareddy over 14 years ago

Hi

    In one of design's my collegue used set_propagated_clock [all_clocks ] in the preCTS stage . He also applied latency on the memory clock pins .

a. what might be the reason for using   set_propagated_clock [all_clocks ] in the prects case

b . If we use set_propagated_clock [all_clocks ] command at the end of SDC file which one take precedance . Can we see latency applied on memory clock pins in the timing report .

 

Regards

Shiva

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  • Kari
    Kari over 13 years ago

     I think set_propagated_clock is ignored in the preCTS stage. I can't think of a reason to do it anyway. 

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  • Andrea Spiezia
    Andrea Spiezia over 6 years ago in reply to Kari

    Hi,

    in the Innovus User Guide 18.11 is reported: set_propagated_clock will limit preCTS optimization by not allowing resize on sequential elements.

    So it seems that set_propagated_clock has some effects in preCTS, but in the specific page of set_propagated_clock in the same UG, is not mentioned any limitation of this command.

    So my question is: is it true that set_propagated_clock not allowing resize in preCTS? If yes, why?

    https://support.cadence.com/apex/techpubDocViewerPage?path=innovusTCR/innovusTCR18.11/set_propagated_clock.html 

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