Intel® Quartus® Prime Standard Edition User Guide: Timing Analyzer

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ID 683068
Date 2/21/2024
Public
Document Table of Contents
Document Table of Contents x
1. Timing Analysis Introduction 2. Using the Intel® Quartus® Prime Timing Analyzer A. Intel® Quartus® Prime Standard Edition User Guides
1. Timing Analysis Introduction x
1.1. Timing Analysis Basic Concepts 1.2. Document Revision History
1.1. Timing Analysis Basic Concepts x
1.1.1. Timing Path and Clock Analysis 1.1.2. Clock Setup Analysis 1.1.3. Clock Hold Analysis 1.1.4. Recovery and Removal Analysis 1.1.5. Multicycle Path Analysis 1.1.6. Metastability Analysis 1.1.7. Timing Pessimism 1.1.8. Clock-As-Data Analysis 1.1.9. Multicorner Analysis
1.1.1. Timing Path and Clock Analysis x
1.1.1.1. The Timing Netlist 1.1.1.2. Timing Paths 1.1.1.3. Data and Clock Arrival Times 1.1.1.4. Launch and Latch Edges
1.1.5. Multicycle Path Analysis x
1.1.5.1. Multicycle Clock Hold 1.1.5.2. Multicycle Clock Setup
2. Using the Intel® Quartus® Prime Timing Analyzer x
2.1. Enhanced Timing Analysis for Intel® Arria® 10 Devices 2.2. Basic Timing Analysis Flow 2.3. Using Timing Constraints 2.4. Timing Analyzer Tcl Commands 2.5. Timing Analysis of Imported Compilation Results 2.6. Using the Intel® Quartus® Prime Timing Analyzer Document Revision History
2.2. Basic Timing Analysis Flow x
2.2.1. Step 1: Open a Project and Run the Fitter 2.2.2. Step 2: Specify Timing Constraints 2.2.3. Step 3: Specify General Timing Analyzer Settings 2.2.4. Step 4: Run Timing Analysis 2.2.5. Step 5: Analyze Timing Analysis Results
2.2.5. Step 5: Analyze Timing Analysis Results x
2.2.5.1. Timing Report Commands 2.2.5.2. Set Operating Conditions 2.2.5.3. Fmax Summary Report 2.2.5.4. Report Timing Command 2.2.5.5. Correlating Constraints to the Timing Report 2.2.5.6. Locating Timing Paths in Other Tools
2.3. Using Timing Constraints x
2.3.1. Recommended Initial SDC Constraints 2.3.2. SDC File Precedence 2.3.3. Iterative Constraint Modification 2.3.4. Creating Clocks and Clock Constraints 2.3.5. Creating I/O Constraints 2.3.6. Creating Delay and Skew Constraints 2.3.7. Creating Timing Exceptions 2.3.8. Example Circuit and SDC File
2.3.1. Recommended Initial SDC Constraints x
2.3.1.1. Create Clock (create_clock) 2.3.1.2. Derive PLL Clocks (derive_pll_clocks) 2.3.1.3. Derive Clock Uncertainty (derive_clock_uncertainty) 2.3.1.4. Set Clock Groups (set_clock_groups)
2.3.4. Creating Clocks and Clock Constraints x
2.3.4.1. Creating Base Clocks 2.3.4.2. Creating Virtual Clocks 2.3.4.3. Creating Generated Clocks (create_generated_clock) 2.3.4.4. Deriving PLL Clocks 2.3.4.5. Creating Clock Groups (set_clock_groups) 2.3.4.6. Accounting for Clock Effect Characteristics
2.3.4.1. Creating Base Clocks x
2.3.4.1.1. Automatic Clock Detection and Constraint Creation
2.3.4.2. Creating Virtual Clocks x
2.3.4.2.1. Specifying I/O Interface Uncertainty 2.3.4.2.2. I/O Interface Clock Uncertainty Example
2.3.4.3. Creating Generated Clocks (create_generated_clock) x
2.3.4.3.1. Clock Divider Example (-divide_by) 2.3.4.3.2. Clock Multiplexor Example
2.3.4.5. Creating Clock Groups (set_clock_groups) x
2.3.4.5.1. Exclusive Clock Groups (-exclusive) 2.3.4.5.2. Asynchronous Clock Groups (-asynchronous) 2.3.4.5.3. set_clock_groups Constraint Tips
2.3.4.6. Accounting for Clock Effect Characteristics x
2.3.4.6.1. Set Clock Latency (set_clock_latency) 2.3.4.6.2. Clock Uncertainty
2.3.5. Creating I/O Constraints x
2.3.5.1. Input Constraints (set_input_delay) 2.3.5.2. Output Constraints (set_output_delay)
2.3.6. Creating Delay and Skew Constraints x
2.3.6.1. Advanced I/O Timing and Board Trace Model Delay 2.3.6.2. Maximum Skew (set_max_skew) 2.3.6.3. Net Delay (set_net_delay) 2.3.6.4. Create Timing Netlist
2.3.7. Creating Timing Exceptions x
2.3.7.1. Timing Constraint Precedence 2.3.7.2. False Paths (set_false_path) 2.3.7.3. Minimum and Maximum Delays 2.3.7.4. Multicycle Paths 2.3.7.5. Multicycle Exception Examples 2.3.7.6. Delay Annotation
2.3.7.4. Multicycle Paths x
2.3.7.4.1. Common Multicycle Applications 2.3.7.4.2. Relaxing Setup with Multicycle (set_multicyle_path) 2.3.7.4.3. Accounting for a Phase Shift (-phase)
2.3.7.5. Multicycle Exception Examples x
2.3.7.5.1. Default Multicycle Analysis 2.3.7.5.2. End Multicycle Setup = 2 and End Multicycle Hold = 0 2.3.7.5.3. End Multicycle Setup = 2 and End Multicycle Hold = 1 2.3.7.5.4. Same Frequency Clocks with Destination Clock Offset 2.3.7.5.5. Destination Clock Frequency is a Multiple of the Source Clock Frequency 2.3.7.5.6. Destination Clock Frequency is a Multiple of the Source Clock Frequency with an Offset 2.3.7.5.7. Source Clock Frequency is a Multiple of the Destination Clock Frequency 2.3.7.5.8. Source Clock Frequency is a Multiple of the Destination Clock Frequency with an Offset
2.4. Timing Analyzer Tcl Commands x
2.4.1. The quartus_sta Executable 2.4.2. Collection Commands 2.4.3. Identifying the Intel® Quartus® Prime Software Executable from the SDC File
2.4.2. Collection Commands x
2.4.2.1. Wildcard Characters 2.4.2.2. Adding and Removing Collection Items 2.4.2.3. Query of Collections 2.4.2.4. Using the get_pins Command
1. Timing Analysis Introduction
2. Using the Intel® Quartus® Prime Timing Analyzer
A. Intel® Quartus® Prime Standard Edition User Guides

2.6. Using the Intel® Quartus® Prime Timing Analyzer Document Revision History

Document Version Intel® Quartus® Prime Version Changes
2024.02.21 18.1.0
  • Clarified constraint precedence in Maximum Skew and Timing Constraint Precedence topics.
2018.09.24 18.1.0
  • Revised "Basic Timing Analysis Flow" section to add sequential step organization, update steps, and add supporting screenshots.
  • Retitled "SDC Constraint Creation Summary" to " Dual Clock SDC Example."
  • Retitled "Default Settings" to "Default Multicycle Analysis."
  • Retitled "SDC (Clock and Exception) Assignments on Blackbox Ports" to "Constraining Design Partition Ports."
2015.11.02 15.1.0
  • Changed instances of Quartus II to Quartus Prime.
  • Updated information on using Intel® Arria® 10 devices with enhanced timing algorithms.
2015.05.04 15.0.0 Added and updated contents in support of new timing algorithms for Arria 10:
  • Enhanced Timing Analysis for Arria 10
  • Maximum Skew (set_max_skew command)
  • Net Delay (set_net_delay command)
  • Create Generated Clocks (clock-as-data example)
2014.12.15 14.1.0 Major reorganization. Revised and added content to the following topic areas:
  • Timing Constraints
  • Create Clocks and Clock Constraints
  • Creating Generated Clocks
  • Creating Clock Groups
  • Clock Uncertainty
  • Running the Timing Analyzer
  • Generating Timing Reports
  • Understanding Results
  • Constraining and Analyzing with Tcl Commands
August 2014 14.0a10.0 Added command line compilation requirements for Arria 10 devices.
June 2014 14.0.0
  • Minor updates.
  • Updated format.
November 2013 13.1.0
  • Removed HardCopy device information.
June 2012 12.0.0
  • Reorganized chapter.
  • Added “Creating a Constraint File from Intel® Quartus® Prime Templates with the Intel® Quartus® Prime Text Editor” section on creating an SDC constraints file with the Insert Template dialog box.
  • Added “Identifying the Intel® Quartus® Prime Software Executable from the SDC File” section.
  • Revised multicycle exceptions section.
November 2011 11.1.0
  • Consolidated content from the Best Practices for the Intel® Quartus® Prime Timing Analyzer chapter.
  • Changed to new document template.
May 2011 11.0.0
  • Updated to improve flow. Minor editorial updates.
December 2010 10.1.0
  • Changed to new document template.
  • Revised and reorganized entire chapter.
  • Linked to Intel® Quartus® Prime Help.
July 2010 10.0.0 Updated to link to content on SDC commands and the Timing Analyzer GUI in Intel® Quartus® Prime Help.
November 2009 9.1.0 Updated for the Intel® Quartus® Prime software version 9.1, including:
  • Added information about commands for adding and removing items from collections
  • Added information about the set_timing_derate and report_skew commands
  • Added information about worst-case timing reporting
  • Minor editorial updates
November 2008 8.1.0 Updated for the Intel® Quartus® Prime software version 8.1, including:
  • Added the following sections:

    “set_net_delay” on page 7–42

    “Annotated Delay” on page 7–49

    “report_net_delay” on page 7–66

  • Updated the descriptions of the -append and -file < name > options in tables throughout the chapter
  • Updated entire chapter using 8½” × 11” chapter template
  • Minor editorial updates
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