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how to prevent inserting clkbufs along clkpath in the specified moudle??

icmaple

in may case, there is a clkgen moudle.  i Specify the AutoCTSRootPin at chip port,  when cts tracing through the clkgen, cts can insert clkbufs in the module clkgen.    Now ,i wanna prevent it. i ever try set_dont_touch clkgen/net* , unfortunately ,it doesnt work.

any way here is ?!  thanks

  • BobD

    CTS should honor set_dont_touch on nets.  If it doesn't, it's a bug.  You can always file a service request on http://support.cadence.com or with your support AE.

    Thanks,
    Bob

  • eminemshow

    Maybe it depends on what version of SoC Encounter you are using, if you are using SoC E 5.2 or before, then ckSynthesis won't respect sdc commands like set_dont_touch. But I am just wondering, why do you want to dont touch such clock gen cells?

  • icmaple
    thanks. in version 8.1.2  there is a cmd " DontTouchNet" can be used in ctstch file.

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