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Max tran violations

diablo

Pls suggest on improving max tran violations in SocEncounterafter after routing. After postCTS, there are no violations on setup, hold, max_tran, max_fanout. However, after post route, I can see around 100 of max_tran violations but there is still no setup and hold violations. After iteratively running  optDesign -postRoute -drv, i still get those violations. I was wondering why the tool is not using buffers to fix it. 

Parents

  •  Pay attention to the mark behind the transition violations in the report.

    The one marked as dont_touch_net and clock_net will be ignored by the opt enginee.

     You need to double check with your logical design engineer .

    Some non clock tree instance will be marked as clock tree so that the transition violation wont be fixed.

    I usually manually fix this kind of transition violation. 

Reply

  •  Pay attention to the mark behind the transition violations in the report.

    The one marked as dont_touch_net and clock_net will be ignored by the opt enginee.

     You need to double check with your logical design engineer .

    Some non clock tree instance will be marked as clock tree so that the transition violation wont be fixed.

    I usually manually fix this kind of transition violation. 

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