PrimeTime PX: Signoff Power Analysis


In this workshop, you will extend PrimeTime's signoff static timing analysis capability to accurately analyze peak power, average power, clock network power, and multi-voltage power.

Skills learned include:

  • Determining possible analysis methods based on the available data and the application needs
  • Applying a methodology to confirm that the power analysis performed was complete and correct
  • Applying debugging techniques, if necessary
  • Generating and interpreting all of the standard PrimeTime PX reports for switching activity, peak power, average power, clock network power, and multi-voltage power analyses
  • Generating and viewing peak-power waveforms.

To analyze power on multi-voltage designs, you will be using the unified power format (IEEE 1801 UPF) based flow.


At the end of this workshop you should be able to:

  • Read the required timing and power data; verify their completeness
  • Perform peak and average power analysis in the GUI and shell interface
  • Perform SDC clock-frequency-based power scaling in VCD/SAIF average power flow
  • Generate VCD and SAIF switching activity files by simulating RTL and gate-level designs
  • Distinguish between event-based and cycle-accurate peak power (CAPP) analysis
  • Dump and view peak power waveforms
  • Perform conditional peak power analysis
  • Determine quality of analyses from switching activity and power reports
  • Estimate pre-layout clock-tree power
  • Annotate clock network power
  • Determine power savings due to clock gating
  • Specify PVT corner and libraries for multi-voltage power analysis
  • Interpret UPF power intent of a multi-voltage design
  • Perform UPF-flow-based multi-voltage power analysis
  • Perform concurrent multi-rail power analysis using UPF

Audience Profile
Design or Verification engineers who need to choose an appropriate analysis technique and perform signoff power and multi-voltage design analyses using PrimeTime PX

To benefit the most from the material presented in this workshop, you should:

A. Have taken the PrimeTime workshop.


B. Possess equivalent knowledge with PrimeTime, including:

  • Restoring a previously saved design
  • Reading and linking a design
  • Applying timing constraints
  • Generating and interpreting timing reports using the report_timing command

Course Outline

Day 1

  • Introduction to Power Analysis
  • Average Power Analysis
  • Peak Power Analysis
  • Clock Network Power Analysis
  • Multivoltage Power Analysis

Synopsys Tools Used

  • PrimeTime 2015.12-SP3
  • Verdi/nWave 2015.09-SP2-2
  • VCS 2015.09-SP2-2