ces_user.pdf

Constraint Editor System (CES) UsersManual

Software Version EE 7.9

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Constraint Editor System (CES) Users Manual, EE 7.9 3

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Chapter 1CES Quick References and Work Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Quick Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Quick Reference - CES Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Quick Reference - CES GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

File Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Edit Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21View Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Filters Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Tools Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Data Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Output Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Quick Reference - CES Constraint Spreadsheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Trace and Via Properties Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Clearances Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Z-Axis Clearances Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Nets Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Parts Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Noise Rules Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

CES Work Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Schematic-Design Work Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42PCB-Layout Work Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Chapter 2CES Overview and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

CES Constraint-Driven Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45CES Constraint-Driven Design Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Concurrent Design Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Creating PCB Rule Areas Through Rule-Area Schemes . . . . . . . . . . . . . . . . . . . . . . . . . . 46Creating Net Classes to Group Rule-Area Nets More Extensively . . . . . . . . . . . . . . . . . . 46Creating Constraint Classes to Group and Define Net Constraints . . . . . . . . . . . . . . . . . . 47Verifying Design Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Verifying Simulated Constraints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Before You Begin Using CES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47Differential Pairs Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49Importing a Layout Template . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Importing a 2005.x Ces.prefs File. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Design Architect/Board Architect-CES-Board Station XE . . . . . . . . . . . . . . . . . . . . . . . . 51Design Architect/Board Architect-CES-Board Station RE . . . . . . . . . . . . . . . . . . . . . . . . 51DxDesigner-CES-Expedition PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Keyin Netlist-CES-Expedition PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

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4 Constraint Editor System (CES) Users Manual, EE 7.9

Expedition TeamPCB and XtremePCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Starting and Exiting From CES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Starting CES in Standalone Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Viewing Constraint Database Log Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Cross Probing Between Design Systems and CES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55Cross Probing From the Navigator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Setting Up CES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Specifying Design Preferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Setting Display Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60Setting General Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Setting Units for the CES Spreadsheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62Reusing Settings in External Designs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Modifying Simulation Settings and Stimulus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Modifying Simulation Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Modifying Simulation Stimulus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Customizing the Display of CES Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73Customizing CES Toolbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Modifying Toolbars to Create Custom Sets of Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . 75Creating New Toolbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76Specifying General Toolbar Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77Resetting a Toolbar to the Default Grouping of Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Running Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79Creating or Opening a Script File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80Importing Designs Into CES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Specifying General Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81Specifying Reference Designator Prefixes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81Specifying Power and Ground Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Customizing the Constraint Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82Creating Custom Spreadsheet Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83Sharing Your Constraint Set With Other Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Adding Custom Menu Selections to the Tools Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84Customizing Command Shortcut Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Chapter 3CES Constraint Spreadsheet Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Defining Constraints With CES Spreadsheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87Understanding Constraint Hierarchy and Overrides. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88Organization of CES Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88Selecting CES Spreadsheet Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89Identifying Spreadsheet Icons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90Resizing Spreadsheet Columns and Rows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91Zooming the Display of Spreadsheet Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92Expanding and Collapsing Spreadsheet Rows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93Sorting Constraint Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93Deleting Constraint Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94Copying and Pasting Constraint Values Between Separate Invocations of CES . . . . . . . . 94

Searching for Constraints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94Filtering Spreadsheet Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

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Filtering the CES Spreadsheet by Row Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99Resetting the Spreadsheet to its Default View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99Creating Constraint Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100Working Concurrently With Other Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Adding Comments to Your Constraint Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102Viewing Constraint Reference Information and Cell Properties . . . . . . . . . . . . . . . . . . . . . . 103

Viewing Cell Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104Viewing Design Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105Checking Constraints and Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Correcting CES Diagnostics Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106Validating Constraints Against PCB Actuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Viewing All Constraint Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109Updating Actuals Displayed in CES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110Clearing Actuals From the CES Spreadsheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110Highlighting Constraint Differences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110Sharing PCB Actuals With Front-End CES Sessions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Updating Electrical Net Data and Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112Resolving Existing Constraint Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Painting Rules to Reuse Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113Rolling Back and Undoing Constraint Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Supported Undo/Redo Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115Saving Constraint Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Overwriting the Board Station RE Log File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Chapter 4Rule-Area Scheme Creation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Creating Schemes to Represent PCB Rule Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117(Minimum) Scheme Clearances and Widths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Specifying Trace and Via Rules for Rule-Area Schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Defining Via Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Creating Clearance Rule Sets for Rule-Area Schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120Defining Embedded Resistor Clearance Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123Defining SMD Clearance Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Assigning Class-To-Class Clearance Rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125Assigning Z-Axis Class-To-Class Clearance Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126Assigning Package Clearance Type Rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Determining Package Side and End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132Creating New PCB Layout Package Types in a Board Station Flow. . . . . . . . . . . . . . . . . 132

Specifying General Clearance Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133Copying, Renaming, and Deleting Rule-Area Schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135Resetting Clearance Rules to the Master Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Chapter 5Net Class Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Creating Net Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139Creating Net Class Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Adding Nets to a Net Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141Adding Power Nets to a Net Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

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Determining Net Class Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143Creating a Net Class From an Existing Net Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144Deleting Net Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Chapter 6Constraint Class Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Creating Constraint Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147Creating Constraint Class Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Adding Nets to a Constraint Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149Defining Bus Constraint Classes Automatically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Determining Nets That Comprise a Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151Creating a Constraint Class From an Existing Constraint Class . . . . . . . . . . . . . . . . . . . . . . 153Deleting Constraint Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Chapter 7Net Constraint Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Specifying General Net Constraints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155Specifying Topologies for Nets and Constraint Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

From-Tos, Pin Pairs, or Both? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156Handling Multiple Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157Creating Pin Sets to Construct Advanced Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158Overriding Trace Width Constraints for From-Tos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Defining Pin Pairs for Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161Including Internal Component-Pin Delay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163Defining Discrete Component Pin Pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Specifying Delay Rules for Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164Defining a Routing Tolerance for All Nets Within a Constraint Class . . . . . . . . . . . . . . . 165Specifying Maximum Length as a Percentage Above Manhattan Length . . . . . . . . . . . . . 165Net Delay Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166Matching Delay Rules Among Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167Matching Delay Tolerance at the Constraint Class Level . . . . . . . . . . . . . . . . . . . . . . . . . 169

Defining Formulas to Create Net Relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170Including Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171Entering Multiple Formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171Solving Formulas to Check for Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Creating Constants and Variables for Delay Rules and Formulas. . . . . . . . . . . . . . . . . . . . . 173Using Free Variables to Constrain Delay by Group Only . . . . . . . . . . . . . . . . . . . . . . . . . 173

Specifying Simulated Delay Rules for Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174Signal Edge Rates and Crosstalk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175Matching Simulated Delay Rules Among Nets or Constraint Classes . . . . . . . . . . . . . . . . 176

Defining Overshoot and Ringback Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177Understanding Static and Dynamic Overshoot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Modifying I/O Designer FPGA Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180Updating FPGA Constraints Between Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Defining Constraints for Single-Pin Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

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Chapter 8Parallelism and Crosstalk Rule Creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Determining When to Use Parallelism or Crosstalk Rules . . . . . . . . . . . . . . . . . . . . . . . . . . 183Rule Precedence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183Parallelism Rules Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184Choosing Between Noise Rule Types for AutoActive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Defining Parallelism Rules for Stack-Up Layers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184Parallelism Rule Definition Methodologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Assigning Parallelism Rules to Nets and Constraint Classes . . . . . . . . . . . . . . . . . . . . . . . . 186Navigating to Assigned Parallelism Rules From the Nets Page . . . . . . . . . . . . . . . . . . . . . 188

Defining Crosstalk Rules for Nets and Constraint Classes . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Chapter 9Differential-Pair Net and Rule Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Defining Differential Pairs Manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191Defining Differential Pairs Automatically. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

IBIS Model [Diff_Pin] Section Declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194Assigning Rules to Differential Pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Differential-Pair Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Chapter 10Constraint Template Definition and Reuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Defining Constraint Templates to Capture Net Constraints . . . . . . . . . . . . . . . . . . . . . . . . . 197Developing Libraries of Constraint Templates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198Constraints and Values Stored With Each Template . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Applying Constraint Templates to Nets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199Applying Constraint Templates From the Nets Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201Modifying Pin Matching for an Applied Constraint Template. . . . . . . . . . . . . . . . . . . . . . 201Updating a Net With Constraint Template Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

Reusing Constraint Templates in External Designs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Chapter 11CES Constraints Import and Export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Importing CES Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205Exporting CES Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Chapter 12Stackup Property Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Viewing or Modifying Stackup Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209Correlating Layer Names Among Design Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Chapter 13Part-Model Assignment Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Verifying Default Part-Model Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211Automatic Assignment of IBIS Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Specifying Available Part Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213IBIS Models Delivered With CES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

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Specifying Model File Directories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213Specifying Individual Model Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214Understanding Relative Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

Assigning Models to Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215IBIS Models or Technology Models?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216Updating Part Model Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216Reloading Model Directories and Individual Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Overriding IBIS Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Chapter 14Signal Integrity Exploration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Sending Nets to HyperLynx LineSim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219Sending Nets to ICX Pro Explorer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

Creating Constraint Templates to Capture Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . 221Updating CES With Constraint Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

Chapter 15Design Tool Update. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227

Managing Design Changes Between Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227Communicating Design Changes Between Schematic and Layout . . . . . . . . . . . . . . . . . . 227CES Synchronization of Constraint Databases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228Resolving Constraint Conflicts Between Front-End and Back-End Designs. . . . . . . . . . . 232

Resolving Constraint Conflicts Manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233Viewing Constraint Resolution Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Synchronizing Constraint Data Between Schematics and CES. . . . . . . . . . . . . . . . . . . . . . . 235Sending Schematic Data to Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Sending DxDesigner Schematic Data to Expedition PCB . . . . . . . . . . . . . . . . . . . . . . . . . 235Synchronizing Constraint Data Between CES and Layout . . . . . . . . . . . . . . . . . . . . . . . . . . 236Sending Layout Data to Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Appendix ACES Constraint Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Using This Constraint Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237Supported Design Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Trace and Via Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241Via Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242Route . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243Trace Width Minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244Trace Width Typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245Trace Width Expansion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246Typical Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247Diff Pair Spacing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248

Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251Trace To Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

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Trace To Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253Trace To Via . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254Trace To Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255Trace To SMD Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256Pad To Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257Pad To Via . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258Pad To Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259Via To Via. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260Via To Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261Via To SMD Pad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262Plane To Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263Embedded Resistor To Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264Embedded Resistor To Pad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265Embedded Resistor To Via . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266Embedded Resistor To Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267EP Mask To Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268EP Mask To Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269EP Mask To Via . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270EP Mask To Resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

Z-Axis Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273Trace To Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274Trace To Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275Trace To Via . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276Trace To Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277Trace To SMD Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279# Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280Analog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282Net Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283Template Name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284Template Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285Topology Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286Topology Ordered. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288Stub Length Max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289# Vias Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290Max Restricted Layer Length External. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291Max Restricted Layer Length Internal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292From To Constraints Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293From To Constraints Trace Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294From To Constraints Z0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295Jumpers Allowed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296Length or TOF Delay Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297Length or TOF Delay Min . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298Length or TOF Delay Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299Length or TOF Delay Manhattan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301Length or TOF Delay Min Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302Length or TOF Delay Match. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Table of Contents


Length or TOF Delay Tol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304Length or TOF Delay Delta . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305Length or TOF Delay Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306Formulas Formula. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307Formulas Violation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308Static Low Overshoot Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309Static High Overshoot Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311Dynamic Low Overshoot Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313Dynamic High Overshoot Max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315Ringback Margin High Min . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317Ringback Margin Low Min . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318Non-Monotonic Edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319Single Ended Characteristic Impedance Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320Single Ended Characteristic Impedance Tol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321Simulation Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322Simulation Stimulus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324Simulated Delay Edge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325Simulated Delay Min . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327Simulated Delay Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328Simulated Delay Max Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329Simulated Delay Match To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330Simulated Delay Match. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331Simulated Delay Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333Simulated Delay Tol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334Pair Tol Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335Convergence Tolerance Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336Distance to Convergence Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337Separation Distance Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338Differential Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339Differential Impedance Target . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340Differential Impedance Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341I/O Designer I/O Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343Hierarchical Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344Part Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345Qty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346Part Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348IBIS Component Name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351IBIS Pin Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352Schematic Pin Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353Topology Pin Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354Pin Package Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355Thermal Power Dissipation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356Thermal Power Scaling Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357Thermal Theta-jc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358Thermal Casing Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359

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Thermal Junction Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360I/O Designer I/O Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361

Noise Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362Noise Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363Constraint Class or Electrical Net Name Victim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364Constraint Class or Electrical Net Name Aggressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365Parallelism Rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366Crosstalk Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367Crosstalk Est Actual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369Crosstalk Sim Actual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370Crosstalk Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371Crosstalk Auto Route Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 372

Index

End-User License Agreement

Table of Contents



Chapter 1CES Quick References and Work Flows

Welcome to the Constraint Editor System (CES) Users Manual. This section includes quickreferences and work flows that will help you get up, running, and comfortable with CES in aminimal amount of time.

Quick HelpPlease click within the following illustration for single-click access to a wide variety of topicscovered in this manual.

Figure 1-1. Constraint Editor System (CES) Quick Help

Constraint Editor System (CES) Users Manual, EE 7.914

CES Quick References and Work FlowsQuick Reference - CES Commands

Quick Reference - CES CommandsYou can use this reference to quickly find specific CES commands. They are organizedalphabetically by design object and then action/task. You can also print this quick reference tokeep it handy while you use CES.

Click within the Topic column to jump to the corresponding topic for one of the followingcommands. When viewing this documentation from your web browser, to open this quickreference in a standalone browser window, click here.

Table 1-1. CES CommandsDesignObject

Action CES Command Topic

Busconstraintclass

Define (auto) CES Spreadsheet > Nets tab >Edit menu > Auto Bus

Defining BusConstraint ClassesAutomatically onpage 150

Clearancerule set

Assign CES Spreadsheet > Clearances tab> Clearances toolbar >

Assigning Class-To-Class ClearanceRules on page 125

Clearancerule set

Create Navigator > expand Schemes >right-click a scheme > NewClearance Rule

Creating ClearanceRule Sets for Rule-Area Schemes onpage 120

Constant Create CES Spreadsheet > Nets tab >Edit menu > Variables > Edit

Creating Constantsand Variables forDelay Rules andFormulas onpage 173

Constraint Export File > Export > Constraints Exporting CESConstraints onpage 205

Constraint Import File > Import > Constraints Importing CESConstraints onpage 205

Constraint Rollback File > Rollback Changes Rolling Back andUndoing ConstraintChanges onpage 113

Constraint Search Find toolbar > Searching forConstraints onpage 94



Constraint View Info CES Spreadsheet > right-click aconstraint cell > Cell Info

Viewing ConstraintReferenceInformation and CellProperties onpage 103

Constraintclass

Add nets CES Spreadsheet > Nets tab >Main toolbar >

Adding Nets to aConstraint Class onpage 149

Constraintclass

Copyconstraints

Navigator > expand ConstraintClasses > right-click a constraintclass > Clone

Creating aConstraint ClassFrom an ExistingConstraint Class onpage 153

Constraintclass

Create Navigator > right-click ConstraintClasses > New Constraint Class

Creating ConstraintClasses on page 147

Constraintclass

Rename Navigator > expand ConstraintClasses > right-click a constraintclass > Rename

To Rename aConstraint Class onpage 148

Constraintgroup

Create CES Spreadsheet > Nets, Parts, orConstraint Templates tab> Grouppulldown > Edit User Groups >

Creating ConstraintGroups on page 100

Constrainttemplate

Apply CES Spreadsheet > Nets tab >Edit menu > Apply ConstraintTemplate

Applying ConstraintTemplates to Nets onpage 199

Constrainttemplate

Define CES Spreadsheet > Nets tab >right-click an electrical net ( ) >Create Constraint Template

Defining ConstraintTemplates to CaptureNet Constraints onpage 197

Constrainttemplate

Reuse(external)

File > Export > Constraints Reusing ConstraintTemplates in ExternalDesigns on page 203

Default rules Revert Navigator > expand Schemes >click a scheme > Main toolbar >

Resetting ClearanceRules to the MasterScheme on page 136

Designconfiguration

Set up Edit > Design Preferences Specifying DesignPreferences onpage 56

Table 1-1. CES Commands (cont.)DesignObject




Differentialpair

Create (auto) CES Spreadsheet > Nets tab >Pairs toolbar >

Defining DifferentialPairs Automaticallyon page 192

Differentialpair

Create(manual)

CES Spreadsheet > Nets tab >select two nets > Pairs toolbar >

Defining DifferentialPairs Manually onpage 191

Differentialpair

Specifydelay rules

CES Spreadsheet > Nets tab >Group pulldown > Delays andLengths

Specifying DelayRules for Nets onpage 164

Discrete pinpair

Define CES Spreadsheet > Parts tab >right-click a top-level discrete >Create Pin Pairs

Defining Pin Pairsfor Nets on page 161

Formula Define CES Spreadsheet > Nets tab >design object row > FormulasFormula cell

Defining Formulasto Create NetRelationships onpage 170

Formula Solve CES Spreadsheet > Nets tab >Pairs toolbar >

Solving Formulas toCheck for Errors onpage 172

From-to Define CES Spreadsheet > Nets tab > setTopology Type to Custom >Topology toolbar >

To Manually DefineNetline Ordering(From-Tos) for aSpecific Net onpage 157

Generalclearancerules

Specify CES Spreadsheet > Clearances tab> Clearances toolbar >

Specifying GeneralClearance Rules onpage 133

Net Explore SI CES Spreadsheet > Nets tab >right-click an electrical net ( ) >Display Net in > HyperLynxLineSim

Sending Nets toHyperLynx LineSimon page 219

Net Explore SI CES Spreadsheet > Nets tab >right-click an electrical net ( ) >Display Net in > ICX ProExplorer

Sending Nets to ICXPro Explorer onpage 220

Net Specifydelay rules







Net class Add Nets CES Spreadsheet > Trace & ViaProperties tab > Main toolbar >

Adding Nets to a NetClass on page 141

Net class Copyconstraints

Navigator > expand Net Classes >right-click a net class > Clone

Creating a Net ClassFrom an Existing NetClass on page 144

Net class Create Navigator > right-click NetClasses > New Net Class

Creating NetClasses on page 139

Net class Rename Navigator > expand Net Classes >right-click a net class > Rename

To Rename a NetClass on page 140

Packageclearancetype rules

Assign CES Spreadsheet > Clearances tab> Clearances toolbar >

Assigning PackageClearance TypeRules on page 128

Parallelismrules

Assign CES Spreadsheet > Noise Rulestab > Pairs toolbar >

AssigningParallelism Rules toNets and ConstraintClasses on page 186

Parallelismrules

Define Edit > Parallelism Rules > DefineParallelism Rules

Defining ParallelismRules for Stack-UpLayers on page 184

Parallelismrules

Navigate CES Spreadsheet > Nets tab >right-click a net or constraint class> Navigate to Parallelism Rule

Navigating toAssigned ParallelismRules From the NetsPage on page 188

Part model Assign CES Spreadsheet > Parts tab >IBIS Component Name andTechnology cells >

Assigning Models toParts on page 215

Part model Makeavailable

Edit > Simulation > Model SearchPath

Specifying AvailablePart Models onpage 213

Part model VerifyAssignments

Data > Model Audit Report Verifying DefaultPart-ModelAssignments onpage 211

Pin pair Define (auto) CES Spreadsheet > Nets tab >Pairs toolbar >

To Define All PinPairs Automaticallyon page 162





Pin pair Define(manual)

CES Spreadsheet > Nets tab > netrow > Edit menu > Pin Pairs >Add Pin Pairs

To Define Pin PairsManually onpage 162

Pin pair Specifydelay rules



Pin set Create CES Spreadsheet > Nets tab > netrow > Topology toolbar > >> , , , , or > select pins> Finish

Creating Pin Sets toConstruct AdvancedTopologies onpage 158

Rule-areascheme

Create CES Spreadsheet > Trace & ViaProperties tab or Clearances tab >Main toolbar >

Creating Schemes toRepresent PCB RuleAreas on page 117

Stackup Edit File toolbar > Viewing orModifying StackupProperties onpage 209

Topology Specify(custom)

CES Spreadsheet > Nets tab > netrow > Topology toolbar > >

SpecifyingTopologies for Netsand ConstraintClasses on page 156

Topology Specify (pre-defined)

CES Spreadsheet > Nets tab > netrow > Topology toolbar > , ,

, , or

SpecifyingTopologies for Netsand ConstraintClasses on page 156

Trace & viarules

Overridewidths(from-to)

CES Spreadsheet > Nets tab >From To Constraints Trace Widthcell

Overriding TraceWidth Constraints forFrom-Tos onpage 161

Trace & viarules

Specify CES Spreadsheet > Trace & ViaProperties tab > expand a scheme

Specifying Traceand Via Rules forRule-Area Schemeson page 118

Units Set Setup > Options > expand Units >Display Units and Notation

Setting Units for theCES Spreadsheet onpage 62





Variables Create CES Spreadsheet > Nets tab >Edit menu > Variables > Edit

Creating Constantsand Variables forDelay Rules andFormulas onpage 173

Variables Findreferences

CES Spreadsheet > Nets tab >Edit menu > Variables > FindVariables Reference

To Find VariableReferences onpage 174

Z-axisclearancerule set

Assign CES Spreadsheet > Z-AxisClearances tab > Clearancestoolbar >

Assigning Z-AxisClass-To-ClassClearance Rules onpage 126

Z-axisclearancerule set

Create CES Spreadsheet > Z-AxisClearances tab > right-clickexisting rule set > New Z-AxisClearance Rule

Creating ClearanceRule Sets for Rule-Area Schemes onpage 120




CES Quick References and Work FlowsQuick Reference - CES GUI

Quick Reference - CES GUIYou can use this reference to quickly determine the purpose of specific menu selectionsavailable through the CES graphical user interface. You can also print this quick reference tokeep it handy while you use CES.

Click within the right column of the tables below to view the topic associated with a specificmenu selection. When viewing this documentation from your web browser, to open this quickreference in a standalone browser window, click here.

File MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific File menu command.

Table 1-2. File Menu SelectionsMenu Command Topic/PurposeFile > Rollback Changes Rolling Back and Undoing Constraint Changes on

page 113File > Open Project Open a .prj file when you launch CES in standalone mode.File > New Script Create a scripting form.File > Open Script Open a scripting form.File > Print Setup Set up your printer.File > Print Preview View preview of a print job.File > Print Print CES Spreadsheet content.File > Log Viewer Viewing Constraint Database Log Files on page 55File > Import > LayoutTemplate

Importing a Layout Template on page 50

File > Import > Constraints Importing CES Constraints on page 205File > Import > ConstraintTemplate

Reusing Constraint Templates in External Designs onpage 203

File > Import > Settings Reusing Settings in External Designs on page 65File > Import > PreferencesFile

Importing a 2005.x Ces.prefs File on page 50

File > Export > Constraints Exporting CES Constraints on page 205File > Export > Constraintsto ASCII

Exporting CES Constraints on page 205



Edit MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific Edit menu command.

File > Export > ConstraintTemplate

Reusing Constraint Templates in External Designs onpage 203

File > Export > Settings Reusing Settings in External Designs on page 65File > Export > Actuals Sharing PCB Actuals With Front-End CES Sessions on

page 111File > Exit Exit CES.

Table 1-3. Edit Menu SelectionsMenu Command Topic/PurposeEdit > Undo Undo last operation.Edit > Redo Redo last undo operation.Edit > Cut Cut selection.Edit > Copy Copy selection.Edit > Paste Paste selection.Edit > Delete Delete selection.Edit > Find Searching for Constraints on page 94Edit > Replace Searching for Constraints on page 94Edit > Pin Pairs > Add PinPairs

Defining Pin Pairs for Nets on page 161

Edit > Pin Pairs > Auto PinPair Generation

To Define All Pin Pairs Automatically on page 162

Edit > Pin Pairs > AutoSimulation Pin PairGeneration

To Define Only Simulation Pin Pairs Automatically onpage 162

Edit > Netline Order To Manually Define Netline Ordering (From-Tos) for aSpecific Net on page 157

Edit > Diff Pairs > Diff Pairfrom Selected Nets

Defining Differential Pairs Manually on page 191

Edit > Diff Pairs > AutoAssign Diff Pairs

Defining Differential Pairs Automatically on page 192

Table 1-2. File Menu Selections (cont.)Menu Command Topic/Purpose



Edit > Assign Nets toClasses

Adding Nets to a Net Class on page 141

Edit > Auto Bus Defining Bus Constraint Classes Automatically onpage 150

Edit > Parallelism Rules >Define Parallelism Rules

Defining Parallelism Rules for Stack-Up Layers onpage 184

Edit > Parallelism Rules >Assign Parallelism Rules

Assigning Parallelism Rules to Nets and ConstraintClasses on page 186

Edit > Clearances > AssignPackage Type Clearances

Assigning Package Clearance Type Rules on page 128

Edit > Clearances > Reset toMaster

Resetting Clearance Rules to the Master Scheme onpage 136

Edit > Clearances > GeneralClearances

Specifying General Clearance Rules on page 133

Edit > Clearances > Class toClass Clearance Rule

Assigning Class-To-Class Clearance Rules on page 125

Edit > Clearances > Z-AxisClearances

Creating Clearance Rule Sets for Rule-Area Schemeson page 120

Edit > Clearances > Z-AxisClass to Class ClearanceRule

Assigning Z-Axis Class-To-Class Clearance Rules onpage 126

Edit > Variables > Edit Creating Constants and Variables for Delay Rules andFormulas on page 173

Edit > Variables > FindVariables Reference

To Find Variable References on page 174

Edit > Via Assignments Defining Via Assignments on page 119Edit > Simulation >Simulation Settings

Modifying Simulation Settings on page 66

Edit > Simulation >Simulation Stimulus

Modifying Simulation Stimulus on page 71

Edit > Simulation > SILibrary Search Paths

Specifying Model File Directories on page 213

Edit > Apply ConstraintTemplate

Applying Constraint Templates to Nets on page 199

Edit > ConstraintsDefinition

Customizing the Constraint Set on page 82

Table 1-3. Edit Menu Selections (cont.)Menu Command Topic/Purpose



View MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific View menu command.

Edit > Stackup Viewing or Modifying Stackup Properties on page 209

Table 1-4. View Menu SelectionsMenu Command Topic/PurposeView > Expand Expanding and Collapsing Spreadsheet Rows on

page 93View > Collapse Expanding and Collapsing Spreadsheet Rows on

page 93View > Reset Row Heights To Reset Rows to Their Default Heights on page 92View > Reset ColumnWidths

To Reset Columns to Their Default Widths on page 92

Views > Tabs To Toggle the Display of Specific Windows andWindow Elements on page 74

View > Navigator To Toggle the Display of Specific Windows andWindow Elements on page 74

View > Output To Toggle the Display of Specific Windows andWindow Elements on page 74

View > Scripting To Toggle the Display of Specific Windows andWindow Elements on page 74

View > Status Bar To Toggle the Display of Specific Windows andWindow Elements on page 74

View Properties Displays the properties associated with the active CESspreadsheet cell.

View > Toolbars To Toggle the Display of Specific Windows andWindow Elements on page 74

View > Toolbars >Customize

Customizing CES Toolbars on page 74

Table 1-3. Edit Menu Selections (cont.)Menu Command Topic/Purpose



Setup MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific Setup menu command.

Filters MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific Filters menu command.

Tools MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific Tools menu command.

NoteMost Tools menu selections are only available in standalone CES sessions that arelaunched on an Expedition Enterprise Flow: DxDesigner design.

Table 1-5. Setup Menu SelectionsMenu Command Topic/PurposeSetup > Settings Specifying Design Preferences on page 56 and Setting

Up CES on page 56Setup > Cross Probing Cross Probing Between Design Systems and CES on

page 55Setup > Shortcuts Customizing Command Shortcut Keys on page 85

Table 1-6. Filters Menu SelectionsMenu Command Topic/PurposeFilters > Enabled Filtering Spreadsheet Data on page 97Filters > Cumulative Mode To Enable Cumulative Mode on page 98Filters > Drill-downFiltering

Filtering Spreadsheet Data on page 97

Filters > Levels To Filter the Spreadsheet by Row Type on page 99Filters > Reset To Reset the View of Data Rows to All on page 98

Table 1-7. Tools Menu SelectionsMenu Command Topic/PurposeTools > Dashboard Launch the Mentor Graphics Dashboard.



Data MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific Data menu command.

Tools > DxDesigner Launch DxDesigner.Tools > ICX Pro Explorer Launch ICX Pro Explorer.Tools > ConstraintTemplate Editor

Launch Constraint Template Editor.

Tools > CES Diagnostics Checking Constraints and Synchronization on page 105Tools > Server Manager Launch Server Manager.Tools > Auto BackupUtility

Launch Auto Backup Utility.

Tools > Customize Adding Custom Menu Selections to the Tools Menu onpage 84

Table 1-8. Data Menu SelectionsMenu Command Topic/PurposeData > ConstraintViolations

Viewing All Constraint Violations on page 109

Data > Solve All Formulas Solving Formulas to Check for Errors on page 172Data > Update > SimulationResults

To Update ICX Pro Verify Simulation Results onpage 112

Data > Update > IBIS PinType & Defaults

Updating Part Model Constraints on page 216

Data > Actuals > ImportLayout Actuals

Sharing PCB Actuals With Front-End CES Sessions onpage 111

Data > Actuals > ImportThermal Actuals

Sharing PCB Actuals With Front-End CES Sessions onpage 111

Data > Actuals > Clear AllPages

Clearing Actuals From the CES Spreadsheet onpage 110

Data > Actuals > Clear ThisPage

Clearing Actuals From the CES Spreadsheet onpage 110

Data > Actuals > UpdateAll

To Update All Net Actuals on page 110

Table 1-7. Tools Menu Selections (cont.)Menu Command Topic/Purpose



Output MenuRead a commands purpose or click within the Topic/Purpose column to view thedocumentation associated with a specific Output menu command.

Data > Actuals > UpdateSelected

To Update Selected Net Actuals on page 110

Table 1-9. Output Menu SelectionsMenu Command Topic/PurposeOutput > Model AuditReport

Verifying Default Part-Model Assignments on page 211

Output > Design Statistics Viewing Design Statistics on page 105Output > Check ConstraintsSynchronization

Checking Constraints and Synchronization on page 105

Output > Show iCDBClients

Provides a short report of clients and sub-clients who arecurrently working on the same design.

Output > Report Comments To View Comments on page 103

Table 1-8. Data Menu Selections (cont.)Menu Command Topic/Purpose

CES Quick References and Work FlowsQuick Reference - CES Constraint Spreadsheet


Quick Reference - CES Constraint SpreadsheetYou can use this reference to quickly determine how to best utilize the design constraints youcan define through CES. Constraints are grouped by CES Spreadsheet page and ordered as theyappear on a specific spreadsheet page. You can also print this quick reference to keep it handywhile you use CES. When viewing this documentation from your web browser, to open thisquick reference in a standalone browser window, click here.

CES Constraint Reference: To get more information about a specific constraint, click the CESConstraint name as it appears in one of the quick-reference tables below. Clicking aconstraint name brings you to the corresponding topic for a constraint, all of which are locatedin the CES Constraint Reference (appendix A in the table of contents).

CES Constraint Spreadsheet PagesClick one of the following links to go to a specific constraint spreadsheet quick-reference:

Trace and Via Properties Summary on page 27

Clearances Summary on page 28

Z-Axis Clearances Summary on page 30

Nets Summary on page 31

Parts Summary on page 38

Noise Rules Summary on page 40

Trace and Via Properties SummaryPlease refer to the following table for trace and via property constraint quick-referenceinformation.

Table 1-10. Trace & Via PropertiesCES Constraint PurposeIndex on page 240 Displays the layer number for a board layer. This

constraint is also displayed on the Clearances page and Z-Axis Clearances page.

Type on page 241 Displays the type of printed circuit board layer (e.g.signal, power, and ground). This constraint is alsodisplayed on the Clearances page.

Via Assignments onpage 242

Defines the via assignment for a net class.



Clearances SummaryPlease refer to the following table for clearance constraint quick-reference information.

Route on page 243 Defines whether the board layer is routed during PCBfabrication. You can define Route individually or for allboard layers of a net class.

Trace Width Minimumon page 244

Defines the minimum acceptable trace width. You candefine Trace Width Minimum individually or for all boardlayers of a net class.

Trace Width Typical onpage 245

Defines the typical acceptable trace width. You can defineTrace Width Typical individually or for all boards layersof a net class.

Trace Width Expansionon page 246

Defines the expansion, or maximum acceptable tracewidth.You can define Trace Width Expansion individuallyor for all board layers of a net class.

Typical Impedance onpage 247

Defines signal impedance for the Trace Width Typicalconstraint. When you enter a value into the Trace WidthTypical cell, impedance at this width is calculated andplaced into the Typical Impedance cell.

Diff Pair Spacing onpage 248

Defines the required parallel distance between tracesegments that comprise a differential pair. You can defineDiff Pair Spacing individually or for all board layers of anet class.

Table 1-11. ClearancesCES Constraint PurposeIndex on page 250 Displays the layer number for a board layer. This

constraint is also displayed on the Trace & Via Propertiespage and Z-Axis Clearances page.

Type on page 251 Displays the type of printed circuit board layer (e.g.signal, power, and ground). This constraint is alsodisplayed on the Trace & Via Properties page.

Trace To Trace onpage 252

Defines the minimum clearance distance between tracesegments. You can define Trace to Trace individually orfor all board layers of a clearance rule.

Trace To Pad on page 253 Defines the minimum clearance distance between tracesand pads. You can define Trace To Pad individually or forall board layers of a clearance rule.

Table 1-10. Trace & Via Properties (cont.)CES Constraint Purpose



Trace To Via on page 254 Defines the minimum clearance distance between tracesand vias. You can define Trace To Via individually or forall board layers of a clearance rule.

Trace To Plane onpage 255

Defines the minimum clearance distance between tracesand planes. You can define Trace To Plane individually orfor all board layers of a clearance rule.

Pad To Pad on page 257 Defines the minimum clearance distance between pads.You can define Pad To Pad individually or for all boardlayers of a clearance rule.

Pad To Via on page 258 Defines the minimum clearance distance between padsand vias. You can define Pad To Via individually or for allboard layers of a clearance rule.

Pad To Plane on page 259 Defines the minimum clearance distance between padsand planes. You can define Pad To Plane individually orfor all board layers of a clearance rule.

Trace To SMD Pad onpage 256

Defines the minimum clearance distance between the padsof surface mount devices and traces. You can define TraceTo SMD Pad individually, or for all board layers of aclearance rule.

Via To SMD Pad onpage 262

Defines the minimum clearance distance between the padsof surface mount devices and vias. You can define Via ToSMD Pad individually, or for all board layers of aclearance rule.

Via To Via on page 260 Defines the minimum clearance distance between vias.You can define Via To Via individually or for all boardlayers of a clearance rule.

Via To Plane on page 261 Defines the minimum clearance distance between vias andplanes. You can define Via To Plane individually or for allboard layers of a clearance rule.

Plane To Plane onpage 263

Defines the minimum clearance distance between planes.You can define Plane To Plane individually or for allboard layers of a clearance rule.

Embedded Resistor ToTrace on page 264

Defines the minimum clearance distance between theresistive material of embedded thick-film resistors andtraces. You can define Embedded Resistor To Traceindividually or for all board layers of a clearance rule.

Table 1-11. Clearances (cont.)CES Constraint Purpose



Z-Axis Clearances SummaryPlease refer to the following table for z-axis clearance constraint quick-reference information.

Embedded Resistor ToPad on page 265

Defines the minimum clearance distance between theresistive material of embedded thick-film resistors andpads. You can define Embedded Resistor To Padindividually or for all board layers of a clearance rule.

Embedded Resistor ToVia on page 266

Defines the minimum clearance distance between theresistive material of embedded thick-film resistors andvias. You can define Embedded Resistor To Viaindividually or for all board layers of a clearance rule.

Embedded Resistor ToResistor on page 267

Defines the minimum clearance distance between theresistive material of embedded thick-film resistors. Youcan define Embedded Resistor To Resistor individually orfor all board layers of a clearance rule.

EP Mask To Trace onpage 268

Defines the minimum clearance distance between theproduction mask of embedded thin-film resistors andtraces. You can define EP Mask To Trace individually orfor all board layers of a clearance rule.

EP Mask To Pad onpage 269

Defines the minimum clearance distance between theproduction mask of embedded thin-film resistors andpads. You can define EP Mask To Pad individually or forall board layers of a clearance rule.

EP Mask To Via onpage 270

Defines the minimum clearance distance between theproduction mask of embedded thin-film resistors and vias.You can define EP Mask To Via individually or for allboard layers of a clearance rule.

EP Mask To Resistor onpage 271

Defines the minimum clearance distance between theproduction mask of embedded thin-film resistors and theresistive material of embedded thick-film resistors. Youcan define EP Mask To Resistor individually or for allboard layers of a clearance rule.

Table 1-12. Z-Axis ClearancesCES Constraint PurposeIndex on page 273 Displays the layer number for a board layer. This

constraint is also displayed on the Trace & Via Propertiespage and Clearances page.

Table 1-11. Clearances (cont.)CES Constraint Purpose



Nets SummaryPlease refer to the following table for net constraint quick-reference information.

Trace To Trace onpage 274

Defines the minimum clearance distance between tracesegments located on different signal layers. You candefine Trace To Trace individually or for all board layersof a clearance rule.

Trace To Pad on page 275 Defines the minimum clearance distance between tracesand pads located on different signal layers. You can defineTrace To Pad individually or for all board layers of aclearance rule.

Trace To Via on page 276 Defines the minimum clearance distance between tracesand vias located on different signal layers. You can defineTrace To Via individually or for all board layers of aclearance rule.

Trace To Plane onpage 277

Defines the minimum clearance distance between tracesand planes located on different signal layers. You candefine Trace To Plane individually or for all board layersof a clearance rule.

Trace To SMD Pad onpage 278

Defines the minimum clearance distance between the padsof surface mount devices and traces located on internalsignal layers. You can define Trace To SMD Padindividually, or for all board layers of a clearance rule.

Table 1-13. NetsCES Constraint Group Purpose# Pins on page 280 Displays the number of pins that comprise the

net.

Analog on page 281 Defines the net as analog and prevents physicalnets that comprise an electrical net or differentialpair from being merged into an electrical net ordifferential pair. You can define Analogindividually or for all nets of a constraint class.

Bus on page 282 Defines the constraint class as a bus. Nets withinthe constraint class should be limited to thosenets that comprise the bus.

Net Class on page 283 Displays the net class name to which the netbelongs.

Table 1-12. Z-Axis Clearances (cont.)CES Constraint Purpose



Template Name onpage 284

Optionally, defines the constraint template towhich the net is assigned. You can defineTemplate Name individually or for all nets of aconstraint class.

Template Status onpage 285

Displays the synchronization status of the netwith regard to the current values stored in theconstraint template.

Topology Type onpage 286

Defines the topology type used for routing,which can be an automatic routing pattern, orcustom routing pattern that you define. You candefine Topology Type individually or for all netsof a constraint class.

Topology Ordered onpage 288

For Topology Type Custom or Complex,displays whether the custom topology type hasundergone netline ordering, which is required foreach user-specific topology type.

Stub Length Max onpage 289

Defines the maximum stub length that can becreated when routing this net as a custom,complex, or chained Topology Type. You candefine Stub Length Max individually or for allnets of a constraint class.

# Vias Max on page 290 Defines the maximum number of vias that can becreated when routing a net. This constraint valuemust be between 1 and 1000. You can define #Vias Max individually or for all nets of aconstraint class.

Max Restricted LayerLength External onpage 291

Defines the maximum trace length that can berouted on external restricted board layers. Youcan define Max Restricted Layer Length Externalindividually or for all nets of a constraint class.

Max Restricted LayerLength Internal onpage 292

Defines the maximum trace length that can berouted on internal restricted board layers. Youcan define Max Restricted Layer Length Internalindividually or for all nets of a constraint class.

From To ConstraintsLayer on page 293

Defines the board layer on which to route a from-to that uses Topology Type Custom. You candefine From To Constraints Layer individuallyfor each from-to.

Table 1-13. Nets (cont.)CES Constraint Group Purpose



From To Constraints TraceWidth on page 294

Optionally defines the trace width to which toroute a from-to. You can define From ToConstraints Trace Width individually for eachfrom-to.

From To Constraints Z0on page 295

Displays an impedance calculation based on thetrace width override value defined in From ToConstraints Trace Width.

Jumpers Allowed onpage 296

Displays whether jumpers are allowed on a net.

Length or TOF DelayType on page 297

Defines the delay type for a net, which can becontrolled electrically (TOF) or physically(Length). You can define Length or TOF DelayType individually, for pin pairs, for differentialpairs, or for all nets of a constraint class.

Length or TOF DelayMin on page 298

Defines the minimum acceptable physicalrouting length or signal propagation delay (e.g.time) between design connections. You candefine Length or TOF Delay Min individually,for pin pairs, for differential pairs, or for all netsof a constraint class.

Length or TOF DelayMax on page 299

Defines the maximum acceptable physicalrouting length or signal propagation delay (e.g.time) between design connections. You candefine Length or TOF Delay Max individuallyindividually, for pin pairs, for differential pairs,or for all nets of a constraint class.

Length or TOF DelayManhattan on page 301

Displays the Manhattan net length. This length isreplaced with Length or TOF Delay Actual whenthe net is routed.

Length or TOF Delay MinLength on page 302

Displays the straight line length between two pinpairs when both components are placed. Thislength is replaced with Length or TOF DelayActual when the net is routed.

Length or TOF DelayMatch on page 303

Defines a match character or string (e.g. 1) youcan use to group nets for similar length or time offlight delay routing. You can apply Length orTOF Delay Match individually, for pin pairs, orfor differential pairs.




Length or TOF Delay Tolon page 304

Introduces a tolerance range around the netrouting delay requirements for nets that duplicatea Length or TOF Delay Match (e.g. 1). You canalso define this constraint at the constraint classlevel without the pre-requirement of defining amatch character or string.

Length or TOF DelayDelta on page 305

Displays estimates for routing results that can beachieved without constraint modification.

Length or TOF DelayRange on page 306

Displays the range of length or time of flightactuals for all nets and/or constraint classes thatare part of the same match group.

Formulas Formula onpage 307

Defines a formula that can be used to create delayrelationships between nets and pin pairs. You candefine Formulas Formula individually or for pinpairs.

Formulas Violation onpage 308

Displays formula violation information based onthe Formulas Formula constraint.

Static Low OvershootMax on page 309

Defines the standard acceptable maximum lowoperating voltage (i.e. minimum) for the signal.You can define Static Low Overshoot Maxindividually, for differential pairs, or for all netsof a constraint class.

Static High OvershootMax on page 311

Defines the standard acceptable maximum highoperating voltage (i.e. maximum) for the signal.You can define Static High Overshoot Maxindividually, for differential pairs, or for all netsof a constraint class.

Dynamic Low OvershootMax on page 313

Defines an acceptable smaller maximum lowoperating voltage (i.e. below minimum) for thesignal for a specific duration. You can defineDynamic Low Overshoot Max individually, orfor all nets of a constraint class.

Dynamic High OvershootMax on page 315

Defines an acceptable larger maximum highoperating voltage (i.e. above maximum) for thesignal for a specific duration. You can defineDynamic High Overshoot Max individually, fordifferential pairs, or for all nets of a constraintclass.



Constraint Editor System (CES) Users Manua

Documents

ces_user.pdf