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 holdTargetSlack has no effect 

Last post Thu, Apr 25 2013 6:53 AM by Arslan. 0 replies.
Started by Arslan 25 Apr 2013 06:53 AM. Topic has 0 replies and 434 views
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  • Thu, Apr 25 2013 6:53 AM

    • Arslan
    • Top 500 Contributor
    • Joined on Mon, Dec 10 2012
    • Posts 36
    • Points 510
    holdTargetSlack has no effect Reply

    Hi all. I have a design in which a positive edge triggered flip flop is connected to negative enable latch. both flip flop and latch have same clock (f=2.4GHz). now I am passing this design through encounter and I have given following tcl as always source plugin

    setOptMode -holdTargetSlack 0.15

    setOptMode -setupTargetSlack 0.15

    problem is that after passing through encounter flow, hold slack for latch is not close to 0.15ns. rather it is almost equal to clk->Q delay of flip flop. can anyone guide where am i missing something? 

    • Post Points: 5
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Started by Arslan at 25 Apr 2013 06:53 AM. Topic has 0 replies.