六、建立时间裕量(Setup Slack)和保持时间裕量(Hold Slack) 七、最小时钟周期 一、发射沿(Launch Edge)和锁存沿(Latch Edge) 发射沿(Launch Edge):时序分析的起点,第一级寄存器数据变化的时钟边沿。 锁存沿(Latch Edge):时序分析的终点,用于锁存数据的时钟边沿。 发射沿和锁存沿 二、建立时间(Clock Setup Time...
Rundifferentalgorithmsinmultiplepassesofoptimization,includingaggressivehold violationfixingandreplicationforveryhighfanous. TIP:Hold-Fixingonlyfixesholdtimeaboveacertainthreshold.Thisisbecausetherouteripected tofixanyholdslackviolationsthatarelessthanthethreshold. •AggressiveExplore: SimilartoExplorebutwithdifferentopt...
In case of timing violations, the hierarchy window will also show the total negative slack observed in a specific module. Note: Using the window menu buttons allows you to filter in the module hierarchy for blocks exhibiting II or timing violations. In the schedule viewer main window: • ...
Note: -setup and -hold can be specified together, which is the same as specifying -delay_type min_max. -max_paths <arg> - (Optional) The maximum number of paths to output when sorted by slack; or the maximum number of paths per path group when sorted by group, as specified by -sor...
This can be an issue if this clock communicates with other related clocks in the design because the skew, and consequently the slack, value between the clocks can be inaccurate. Use the create_clock command where the clock trees originate not in the middle of the design (for example, input...
Rundifferentalgorithmsinmultiplepassesofoptimization,includingaggressivehold violationfixingandreplicationforveryhighfanous. TIP:Hold-Fixingonlyfixesholdtimeaboveacertainthreshold.Thisisbecausetherouteripected tofixanyholdslackviolationsthatarelessthanthethreshold. •AggressiveExplore: SimilartoExplorebutwithdifferentopt...