Constraint Manager for xpcb Layout. Table of Contents

Transcription

1 Table of Contents 2014 Mentor Graphics Corporation All rights reserved. This document contains information that is trade secret and proprietary to Mentor Graphics Corporation or its licensors and is subject to license terms. No part of this document may be photocopied, reproduced, translated, distributed, disclosed or provided to third parties without the prior written consent of Mentor Graphics.

2 This document is for information and instruction purposes. Mentor Graphics reserves the right to make changes in specifications and other information contained in this publication without prior notice, and the reader should, in all cases, consult Mentor Graphics to determine whether any changes have been made. The terms and conditions governing the sale and licensing of Mentor Graphics products are set forth in written agreements between Mentor Graphics and its customers. No representation or other affirmation of fact contained in this publication shall be deemed to be a warranty or give rise to any liability of Mentor Graphics whatsoever. MENTOR GRAPHICS MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. MENTOR GRAPHICS SHALL NOT BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS PUBLICATION OR THE INFORMATION CONTAINED IN IT, EVEN IF MENTOR GRAPHICS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. U.S. GOVERNMENT LICENSE RIGHTS: The software and documentation were developed entirely at private expense and are commercial computer software and commercial computer software documentation within the meaning of the applicable acquisition regulations. Accordingly, pursuant to FAR 48 CFR and DFARS 48 CFR , use, duplication and disclosure by or for the U.S. Government or a U.S. Government subcontractor is subject solely to the terms and conditions set forth in the license agreement provided with the software, except for provisions which are contrary to applicable mandatory federal laws. TRADEMARKS: The trademarks, logos and service marks ("Marks") used herein are the property of Mentor Graphics Corporation or other parties. No one is permitted to use these Marks without the prior written consent of Mentor Graphics or the owner of the Mark, as applicable. The use herein of a third-party Mark is not an attempt to indicate Mentor Graphics as a source of a product, but is intended to indicate a product from, or associated with, a particular third party. A current list of Mentor Graphics trademarks may be viewed at: Mentor Graphics Corporation 8005 S.W. Boeckman Road, Wilsonville, Oregon Telephone: Toll-Free Telephone: Website: SupportNet: supportnet.mentor.com/ Send Feedback on Documentation: supportnet.mentor.com/doc_feedback_form End-User License Agreement: You can print a copy of the End-User License Agreement from: Part Number:

3 Module 1 Overview and User Interface Table of Contents Course Overview...6 What is Constraint Manager?...7 Constraint Entry Methodology Using Constraint Manager...8 Constraint Manager Constraints Hierarchy...9 Electrical Net Support...10 Layer Stackup...11 Invoking Constraint Manager...13 Constraint Manager Main Window...14 Default View...15 Zooming...16 Constraint Manager Toolbars...17 Adding Toolbar Buttons...18 Tooltips...19 Objects Visibility...20 User Constraint Groups...21 User Constraint Groups Quick Edit...23 Rule Painter...24 Adding Comments to Constraints...25 Editing/Deleting Comments...26 Comments Toolbar Buttons...27 Rolling Back Changes...28 Constraint Manager Navigator...29 Resetting Views...30 Finding Data in Constraint Manager Spreadsheets...31 Filtering Data in Constraint Manager Spreadsheets...33 Deleting Data in Constraint Manager Spreadsheets...35 Verify Constraints With Actuals...36 Updating Design With Actuals...37 Exporting the Actuals to the Front-End...38 Violations Reporting...39 Cross-probing...41 Module 1 Lab...42

4 Module 2 Design Flow, Net Classes, Trace and Via Properties Table of Contents Constraint Manager in the Design Flow...46 Database Synchronization Overview...47 Resolving Constraint Conflicts...48 Conflict Resolution Settings in xdx Designer...49 Using Constraint Manager From Front-End...50 Forward Annotation From xdx Designer to xpcb Layout...51 Incremental Forward Annotation...52 Back Annotation...53 Where Are We?...54 What Is a Net Class?...55 Creating a Net Class...56 Where Are We?...57 Trace and Via Properties...58 Setting Up Trace Properties...59 Trace Width...60 Setting Up Via Assignments...61 Hierarchical Constraint Propagation...62 Change Impact Change All Affected Values...63 Change Impact Keep All Overrides but Change Others...64 Change Impact Always Prompt User for All Values...65 Where Are We?...66 Assigning Physical Nets Using the Dialog Box...67 Assigning Nets From Nets Spreadsheet...68 Module 2 Lab...69 Module 3 Clearance Rules Clearance Rules...73 Clearances...74 Where Are We?...76 Creating New Clearance Rules...77 Where Are We?...78 Clearance Rules Assignment...79 Setting Up Class to Class Clearances...80 Z-Axis Clearance...81

5 Table of Contents Creating New Z-Axis Clearance Rules...83 Setting Up Class to Class Z-Axis Clearances D Clearances...85 Setting Up 3D Clearances...86 Setting Up General Clearances...87 Setting Up Package Type Clearances...88 Setting Up Package Type to Type Clearance...89 Module 3 Lab...90 Module 4 Schemes Where Are We?...94 Schemes...95 Scheme Usage Example...96 Scheme Hierarchy...97 Creating a Scheme...98 Review: Setting Mechanical Constraints Module 4 Lab Module 5 Constraint Classes and Net Properties Where Are We? High-Speed Constraints High-Speed Constraints Setup Overview What is a Constraint Class? Creating a Constraint Class Assigning Nets to a Constraint Class Assigning Nets to a Constraint Class From Nets Tab Where Are We? Net Properties Topologies Virtual Pins From-To Allowed From-To Constraints Pin Types Topology Types Setting Up Standard Topologies...123

6 Table of Contents Setting Up Custom Topologies (From-Tos) Complex Topologies Setting Up Complex Topologies Maximum Restricted Layer Length Stub Length All Other Net Properties Electrical Net Generation Electrical Net Generation Resistor Packs Power Supply Nets Power Supply Nets Automatic Specification Power Supply Nets Manual Specification Power Supply Net Constraints Module 5 Lab Module 6 Differential Pairs and Constraint Templates Where Are We? Differential Pairs Differential Pairs in Constraint Manager Creating Differential Pairs Single Pairs Creating Differential Pairs Multiple Pairs Differential Impedance Planning Differential Pair Constraints -Trace and Via Properties Tab Differential Pair Constraints Nets Tab What Is a Constraint Template? Constraint Templates Usage Overview Creating a Constraint Template Constraint Templates Tab Applying Constraint Template to Nets Applying Constraint Template Alternate Method Applying Constraint Template - Differential Pairs Exporting Constraints and Constraint Templates Importing Constraints and Constraint Templates Exporting Selection Creating Constraint Templates in HyperLynx Constraint Template Editor (CTE) Module 6 Lab...169

7 Module 7 Length and Delay Constraints Table of Contents Where Are We? Delay Constraints Pin-Pair Creating Pin-Pairs Constants Variables Finding Constants and Variables References Setting Up Min & Max Delays Rules for Entering Min and Max Delays Setting Up Matched Length Rules for Setting Up Matched Length Hierarchical Length Matching Delay Formulas Delay Formulas Strategy Setting Up Delay Formulas Delay Formula Example: Without Const/Var Delay Formula Examples: With a Constant Delay Formulas Examples: With Variables Delay Formulas Example: Constraint Requirements Delay Formulas Example: Strategy Delay Formulas Example: Entering Formulas Module 7 Lab Module 8 Parallelism and Crosstalk Where Are We? Parallelism Rules Creating Parallelism Rules Assigning Parallelism Rules Assigning Parallelism Rule Alternate Method Assigning Maximum Crosstalk Assigning Maximum Crosstalk - Level Maximum Crosstalk Calculations Parallelism and Crosstalk Hazards Cumulative Crosstalk Example...207

8 Table of Contents Resolving Parallelism/Crosstalk Hazards Module 8 Lab Appendix A Electrical Constraints & Simulation Setup Where Are We? Supported Flows With Analysis Tools What Are Electrical Constraints? Electrical vs. Physical Constraints Simulated Delay vs. Time of Flight Factors Affecting TOF Factors Affecting Simulated Delay Simulated Delay Measurements Simulated Delay Constraints Factors Affecting Characteristic Impedance Characteristic Impedance Constraint Overshoot and Ringback Constraints Requirements for Successful Simulation Stackup Editor Setting Up Model Libraries Assigning Models Checking Models Exporting Nets From Constraint Manager to HyperLynx Exporting Nets From xpcb Layout to HyperLynx LineSim Module A Lab Appendix B Managing Constraints User-Level Constraint Management Constraint Management Capabilities Constraint Manager Control Mechanism Editing the Environment Opening Constraint Manager Standalone Defining Constraint Visibility/Edit-ability Closing Constraint Manager Standalone Re-opening Constraint Manager Standalone Updating Constraint Manager Users Environment...244

9 Table of Contents Module B Lab Appendix C Settings and Utilities Setting Up Design Configuration Setting Up Electrical Nets Setting Up Discrete Component Prefixes Setting Up Display Preferences Setting Up General Clearances Setting Up Fonts and Colors Setting Up Display Units Setting Up Notations Setting Up Actuals and Other Preferences User Interface Settings File (ces.ini) Constraint Definition File (user.cns) Constraint Manager Project Backup Constraint Manager Command Line Tools Running Diagnostics Diagnostics Tests Automatic Fixing of Diagnostics Errors Module C Lab Appendix D Introduction to Constraint Editor Constraint Manager and Constraint Editor What is Constraint Editor? Back-end Snapshot Starting Constraint Editor Constraint Editor User Interface Overview Constraint Editor Bars Basic Tasks in Constraint Editor Clearances in Constraint Editor Trace Width in Constraint Editor Match Groups in Constraint Editor Comparing Constraints Module D Lab...283

10 Appendix E Mentor Graphics Support Table of Contents Mentor Support Plan Expert Product Support Comprehensive Online Solutions Flexible Training Mentor Productivity Services Productivity Services Categories...292