---

Contents

---

1

Design Rule Driven Editing

Turning on DRD Editing

Setting Up DRC Options

DRD Configuration File

Specifying Options on the DRC Toolbar

DRD Operating Modes

Using Enforce Mode

Using Notify Mode

Using Post Edit Mode

Ignoring Violations inside Instances

Severity of DRD Markers

Selecting Constraints for Verification

Selecting Layers for Verification

Managing Interactive Display Options

Performing Color Checks

Color Constraints Checks

Color-Related Flow Checks

DRD Editing and Blockage Objects

Using DRD Editing in VLS XL and VLS EXL

Batch-Check Mode

Verifying Selected Objects

Verifying Nets

2

DRD Advanced Features

DRD Targets

Setting DRD Targets

Unsetting DRD Targets

Bindkey Reassignment

Targeted Enforce

Relaxed Enforce

Deferred Post Edit

What-if Halos

What-if Functionality for Hierarchical Objects

DRD Smart Snapping

Snapping to Halos and Discrete Spacing Values

Snapping to a What-if Halo around a DRD Target

Simultaneous Snapping between Two Orthogonal Edges

Layer-to-Layer Snapping

Snapping Based on the minArea Constraint

Snapping Using the Quick Align Form in Virtuoso

Snapping with DRD Enforce Enabled

Toggling DRD Smart Snap during Interactive Editing

Incremental Violation Display

Excluding Instances from Checking

3

DRD Support for FinFET Devices

Defining Discrete Spacing Rules

Defining Minimum Spacing Rules

Defining Directional and Discrete Width Rules

Defining Directional and Discrete PR Boundary Rules

Defining Directional and Discrete PR Boundary Width Rules

Defining Directional and Discrete PR Boundary Spacing Rules

Snapping Objects to Legal Width Values

Examples of Discrete Dimension Gravity

Defining Directional and Discrete Opposite Extension Rules

4

DRD Constraints Support

Supported Constraints

Supported Constraints and Parameters

Supported Constraints and Parameters (Virtuoso Layout Suite EXL)

Supported Constraints and Parameters (Virtuoso Advanced Node for Layout Standard)

Supported Constraints and Parameters (Virtuoso Advanced Node for Layout Only)

Using DRD Grid Checking

Specifying Layers in the Interconnect Section

Supported Derived Layers

Supported Layer-Purpose Pair and Voltage-Dependent Constraints

Support for Layer-Purpose Pair Constraints

Support for Voltage-Dependent Constraints

Using Density Constraints

Using Alternate Foundry Constraint Group

A

DRD Form Descriptions

DRC Options Form

Interactive

Batch

Filters

Sign-Off Settings

Signoff Fill Form

B

DRD Environment Variables

List of Environment Variables

drdBatchColorability

drdBatchColorShorts

drdBatchConsiderGrayShapes

drdBatchConsiderUnlockedShapesAsGray

drdBatchFoundryRulesOnly

drdBatchReportCoveredNonPcellGrayShapes

drdBatchScopeAreaLimit

drdBatchScopeSpecifiedArea

drdBatchUncoloredShapes

drdBatchUnlocked

drdBatchVioLimit

drdColorability

drdColorShorts

drdConsiderGrayShapes

drdConsiderUnlockedShapesAsGray

drdEditAllowOrthogonalAdjust

drdEditAutoText

drdEditAutoTurnOffHalo

drdEditAutoTurnOffHaloLimit

drdEditBatchColorRules

drdEditBatchHierDepth

drdEditColorRules

drdEditDensityTypeCheck

drdEditDisplayArrows

drdEditDisplayDashed

drdEditDisplayDrawingColor

drdEditDisplayEdges

drdEditDisplayHalo

drdEditDisplayMarkers

drdEditDisplayMaxChars

drdEditDisplayTechRefs

drdEditDisplayText

drdEditDisplayTrueColor

drdEditEnableBatchCheckOnReadOnlyDesign

drdEditFontSize

drdEditHierDepth

drdEditIgnoreIntraInstanceChecks

drdEditMode

drdEditPaletteLayers

drdEditSlidingWindowSize

drdEditSmartSnapAllowedWidthSnap

drdEditSmartSnapAperture

drdEditVioLimit

drdInteractiveFoundryRulesOnly

drdMobilityMode

drdPostEditAllWindows

drdPostEditEIPAllInstances

drdPostEditEIPAllWindows

drdPostEditEIPCheckTopView

drdPostEditIgnoreModgen

drdPostEditReplaceAllMarkers

drdPostEditTimeOut

drdPostEditVioLimit

drdUncoloredShapes

drdUnlocked

drdUseBlockageForExtCheck

drdUseNetName

drdUseNewDerivedLayerEngine

drdValidLayersGrayCheck

drdVDRIncludePurposes

threads

C

Blockage and Boundary Objects

DRD Editing and Blockage Objects

Effective Width

DRD Editing and PR Boundary Objects

Creating and Editing Non-PR Boundary Objects

Return to top