Quartus® Prime Pro Edition User Guide: Timing Analyzer

ID 683243
Date 4/01/2024
Public
Document Table of Contents

2.2.3.2. Running Post-Fit Timing Analysis

Before running post-fit timing analysis, you must run the Fitter to apply conventional SDC constraints to the post-fit timing netlist. The Fitter then attempts to place the logic of your design to adhere to the timing constraints you specify. After running the Fitter, the Timing Analyzer generates reports detailing the margin (slack) by which your design either meets or fails each constraint. The post-fit timing netlist accounts for actual path delays.
To run post-fit timing analysis, follow these steps:
  1. Specify conventional SDC timing constraints for post-fit timing analysis, as Specifying Conventional SDC Timing Constraints describes.
  2. On the Compilation Dashboard, run any stage of the Fitter (Plan, Place, Route, Retime, Fitter (Finalize)) or run a full compilation.
    Figure 44. Fitter Stages in Compilation Dashboard


  3. When the Fitter completes, click the Timing Analyzer icon next to the completed stage in the Compilation Dashboard. The Setup Summary report opens by default in the Timing Analyzer.
  4. Review the timing reports. To generate additional timing reports for analysis, click the Reports menu, and then click one of the submenu items to generate that report, as Step 4: Analyze Timing Reports describes.
    Figure 45. Setup Summary Report


  5. To run timing analysis under different operation conditions, click Set Operating Conditions on the Tasks pane and specify options, as Setting the Operating Conditions for Timing Analysis describes. By default, the Timing Analyzer generates reports for all supported operating conditions.
  6. If you specify any settings or constraints that impact timing analysis, click Update Timing Netlist on the Tasks pane to apply the new constraints to the timing netlist.