时序约束和综合 时钟频率 # 时钟单位为ns,2ns对应500M时钟频率 create_clock -period 2 [get ports clk] skew # 设置时钟的skew,即上升沿之间的误差,当前设置为0.3ns set_clock_uncertainty -setup 0.3 [ge
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13 CDC-Clean Design Using SpyGlass-CDC Note that only following commands of SDC are translated into SGDC: • "create_clock" • "create_generated_clock" – this will be commented in output SGDC. In current run, this command will not be used. • "set_input_delay" • "set_output_...
Atrenta has developed an advanced technology that uses fast synthesis to create a flat gate-level representation so true structural analysis can be performed during the RTL design phase. This enables SpyGlass to detect, at the RT level, very complex design problems such as clock domain ...
Any clock dividers will create generated clocks • These should get used in addition to autoclocks.sgdc Auto_set_case_analysis.sgdc • Clocks that go through muxes need to have a set_case_analysis. • This file identifies ...
. parameter: 可以在进行RTL分析之前设定某些参数, 对检查过程进行一些约束 CDC介绍 CDC(Clock Domain Crossing)的前端设计中最常见的问题, 在RTL中要恰当的处理每个...是各个step的简介:1. Identify the blocks to Abstart in SpyGlass CDC Goal : - 2. Create SpyGlass CDC Setup Synopsys SpyGlass CDC 学习 ...
SmarterOrganizationofDesignIssuesCategorizedbyroot-causeforeasierdebugReportViolationsatSource(clock,reset)ConsolidateViolationsOnceperBlock(always),task,function…..ModulePackage`defineLoop…NonTurbo Turbo E=21 E=2 SmartViolations-BenchmarkData UpTo3XFewerViolationswithTurbo SpyGlassHierarchicalFlowBasics IP1 ...
Another new capability is that SpyGlass can now estimate design complexity using cyclomatic metrics, which is a measure based on branching analysis (usually in software but adapted to RTL). This is a good predictor for the time and effort that will be required to create a verification test benc...
SpyGlassPlatform CDCLintRDC •ReferenceMethodology –HighImpact,Lownoise LowPower •ManagementReports –LinkedHTML PowerEstimate&Reduce SDCDFTTXV •FlexibleUseModels –Batch,TclshellandGUI 3 SoCDesignCostisOutofControl •Increasingcomplexitymeansincreasedrisk –At32nm,atypicaldesignhas~50%chancetomeetall...
–Clock, select, enable, reset pins tied to constants –Unused or disabled gates found –Undriven, multiple-driven, Hanging nets or Floating pins User RTL RTL with No Design Risks Syntax and Lint checks Semantic checks Synthesizability checks ...