[SOLVED] with exclude pin in cts we are fixing data tran but not skew why is that

vivekrajeev said:

Why is that we fix data tran for the exclude pin during CTS( why do u want to do that for what purpose ?) when you dont fix skew

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praveen.kumar432 said:

Hi Fnd,

while doing the cts exclude pins (ignore pins) tool will implicitly defined. cases like 1) clock is going to D, RESET, ENABLE etc pins of flap 2) output ports 3) combinatorial inputs etc..
these all cases there is no use to balance the skew am i correct??So tool will only targets the DRVs means trans,cap and fanout. (SKEW and INSERTION DELAYS are IGNORED)


please correct me if wrong

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vivekrajeev said:

thanks pavan, yes you are right. I found out the answer to some other means also

To add to your points
Cases where the clock is getting divided by two / clock generator ciruits and as you said clock going to data all these places we need not check for skew . Thanks for superb answer

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praveen.kumar432 said:

Hi fnd,

Cases where the clock is getting divided by two / clock generator circuit tool will balance the skew.In this case CP pin of the flop,tool can be define implicit NON STOP PIN.


Thanking you,
Praveen

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