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Contents

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1

Introduction

What is Virtuoso Space-based Router?

Why Use Virtuoso Space-based Router?

Licensing Requirements

Key Benefits

Key Features

Platforms/Operating Systems

Interoperability

Design Data

Connectivity

Hierarchy Depth Control

Data Size and Performance

Data Object Support

2

Technology Requirements

Technology File Requirements

Specifying Layer Order

Specifying Routing Layer Directions

Specifying Via Definitions

Specifying Valid Layers and Valid Vias

Limiting Routing on a layer

Via Usage Model

Specifying Track Patterns and Patterns

Supporting Colored Trim Metal Layers

Using Layer-Purpose Pairs

Poly Pins over an Implant Layer

Support For 45 nm Rules

Constraint Groups

Foundry Constraint Group

Application Constraint Groups

Specifying the Default Constraint Group for Routing

virtuosoDefaultExtractorSetup

virtuosoDefaultSetup

LEFDefaultRouteSpec

virtuosoDefaultTaper

User-Defined Constraint Groups

Storing Constraint Groups

Constraint Group Lookup Precedence

Scalar Versus Table Spacing Rule Precedence

Supported Constraints and Parameters

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

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

3

Power Routing

Power Router Features

Requirements

Recommended Power Router Flow

Adding a Pad Ring

Adding Core Rings

Adding Block Rings

Connecting Pin-to-Trunk

Adding Stripes

Adding Standard Cell Row Straps

Trimming Stripes

Inserting Vias

Tie Shielding

Using the Power Routing Form

Using the Pad Ring Form

Changing the Pad Ring Scheme Definition

Using the Core Ring Form

Changing the Core Ring Scheme Definition

Using the Block Ring Form

Changing the Block Ring Scheme Definition

Using the Stripes Form

Changing the Stripes Scheme Definition

Using the Cell Rows Form

Changing the Cell Rows Scheme Definition

Using the Pin To Trunk Form

Changing the Pin-To-Trunk Scheme Definition

Using the Vias Form

Changing the Vias Scheme Definition

Using the Tie Shield Form

Setting the Packages for the Scheme

Managing Schemes

Creating New Schemes

Deleting a Scheme

Loading a Scheme

Saving a Scheme File

Comparing Schemes

Using SKILL for Power Routing

4

Getting Started

Virtuoso Space-based Router Commands

Route Menu

Virtuoso Space-based Router Toolbar

VSR Workspace

Behavior of Virtuoso Space-based Router Toolbar Icons

Synchronized Route Menu and the Toolbar

Routing Scripts

5

Working with VSR Presets

Virtuoso Space-based Router Preset Toolbar

VSR Reset Options

VSR Save Preset

VSR Delete Preset

VSR Load Preset

Saving a Preset File

Deleting a Preset File

Loading a Preset File

Execution Mode of Preset File

Errors in Preset File Entries

6

Routing Your Design

Using the Virtuoso Space-based Router Options Form

Specifying Design Setup Options

Specifying Routing Flow Options

Specifying Automatic Flow Options

Support for Multiple Forms

Inserting Colored TrimMetal Layers in Automatic Routing

Interrupting Routing for Unresolvable Errors

7

Managing Cover Obstructions While Routing

Defining a Cover Obstruction

Removing a Cover Obstruction

Viewing a Cover Obstruction

8

Specialty Routing

Creating Constraints With the Constraint Manager

Symmetry Routing

Types of Symmetry Routing

Defining a Symmetry Constraint

Automatic Symmetry Routing

Differential Pair Routing

Defining a Differential Pair Constraint

Changing Diff Pair Values in the Process Rules Editor

Shield Routing

Defining Shield Constraints

Shield Styles

Default Shielding Types

Changing Custom Shielding Values in the Process Rules Editor

Tying Shield Wires

Pin Escape Methods

Matched Length Routing

Defining a Matched Length Constraint

Changing Matched Length Values in the Process Rules Editor

9

Using the Pin to Trunk Routing

Pin To Trunk Toolbar

Pin to Trunk: All Nets

Extend Trunks

Trunks Trimming

Reset Pin To Trunk Options

Behavior of Pin to Trunk Toolbar Icons

Behavior of the Pin to Trunk Options Preset Scripts Icon

Behavior of the Extend Trunks Icon

Pin To trunk Routing Options

Specifying Routing Steps

Specifying Routing Scope

Specifying Trunk Options

Specifying Twig Options

Specifying Trunk to Trunk Connections

Composing and Decomposing Trunks

Highlighting Trunks

Using the Finish Trunk Command

10

Using the Tree Route Flow (ICADVM20.1 EXL Only)

About Tree Route

Pre-requisites for Tree Router

Analyzing the Tree Route Structure

Displaying the Tree Routing Options

Specifying the Tree Route Options

Using Auto Device Routing Preset

Running Tree Routing

11

Working with Assisted and Automated Structured Routing (ICADVM20.1 EXL Only)

Using Automatic Trunk Generation in Pin to Trunk Route Flow

Using Trunk Mesh Routing in the Pin to Trunk Route Flow

Using Tree Routing

Performing Area-based Tree Routing

A

Forms Reference

Power Routing Form

Power Routing - Pad Ring tab

Power Routing - Core Ring tab

Power Routing - Block Ring tab

Power Routing - Stripes tab

Power Routing - Cell Rows tab

Power Routing - Pin To Trunk tab

Power Routing - Vias tab

Power Routing - Tie Shield tab

Power Routing Options Form

Power Routing Options - Pad Ring tab

Power Routing Options - Core Ring tab

Power Routing Options - Block Ring tab

Power Routing Options - Stripes tab

Power Routing Options - Cell Rows tab

Power Routing Options - Pin To Trunk tab

Power Routing Options - Vias tab

Power Routing Options - Setup tab

Power Routing Scheme Manager

Power Routing Scheme Manager - File tab

Power Routing Scheme Manager - Compare tab

Power Routing Schemes Compare Result

VSR Preset Forms

VSR Save Preset Form

VSR Delete Preset Form

320

B

Environment Variables

Automatic Router Environment Variables

ia

blockTreatmentTreatAs

busBitTableRows

forceGlobalPlanning

globalAllNets

globalIncludePreroutes

lockPreRoutes

presetDefaultFile

presetLoadMode

presetResetMode

vsrFlow

widthSpaceTableRows

layout

adjustViatoWireEdge

checkRoutabilityCreateExcludeSet

checkRoutabilityMarkersLimit

checkRoutabilityMissingCoverObstruction

checkRoutabilityMissingPRBoundary

checkRoutabilityNotOnPRBoundaryEdge

checkRoutabilityPinOnGrid

checkRoutabilityPinCenterOnGrid

enableMaximizeCuts

enforceGapSpacingOnDiffPairVias

gapFillPurpose

removePrerouteDangles

routeNetAtPinWidth

routeNetAtPinWidthStyle

routeSelectedNets

routeWithLowEffort

setTaperPinWidthNets

trimBridgePurpose

useDoubleCutVias

useWAOverrides

viaMinNumCuts

viaWECutColumns

viaWECutRows

viaWECutSpecified

weBusBitShieldingGap

weBusBitShieldingNetName

weBusBitShieldingOption

weBusBitShieldingWidth

rte

checkRoutabilityBlockage

checkRoutabilityMinSpace

checkRoutabilityMinWidth

checkRoutabilityVia

coverObsMasterTooltipLimit

coverObstUnhiliteOnFormClosed

deleteRoutingKeepFigGroupShapes

deleteRoutingKeepPower

extractedPinStyle

fixErrorsErrorTypesExtension

fixErrorsFixMinAreaAtPins

fixErrorsErrorTypesMinArea

fixErrorsErrorTypesMinEnclArea

fixErrorsErrorTypesMinEdge

fixErrorsErrorTypesMinWidth

fixErrorsErrorTypesRGrid

fixErrorsErrorTypesNumCut

fixErrorsErrorTypesSameMaskSpacing

genRoutingStyle

optimizeRouteReduceVias

routeSearchAndRepair

routingScriptingDir

Power Routing Environment Variables

General Environment Variables

prouteSelectScheme

Pad Ring Environment Variables

proutePadRingAllLayers

proutePadRingEdgePins

proutePadRingLayers

proutePadRingNets

proutePadRingRailPins

Block Ring Environment Variables

powerRouteSingleRing

prouteBlockRingBlockClearance

prouteBlockRingChannels

prouteBlockRingContour

prouteBlockRingHorizLayer

prouteBlockRingLattice

prouteBlockRingNetClearance

prouteBlockRingNets

prouteBlockRingNetWidth

prouteBlockRingVertLayer

Core Ring Environment Variables

prouteCoreRingRingAtCenter

prouteCoreRingCoreClearance

prouteCoreRingHorizLayer

prouteCoreRingInAreaClearance

prouteCoreRingLattice

prouteCoreRingNetClearance

prouteCoreRingNets

prouteCoreRingNetWidth

prouteCoreRingOutAreaClearance

prouteCoreRingPadClearance

prouteCoreRingRelativeTo

prouteCoreRingRTXHi

prouteCoreRingRTXLo

prouteCoreRingRTYHi

prouteCoreRingRTYLo

prouteCoreRingVertLayer

Cell Row Environment Variables

prouteCellRowExtend

prouteCellRowLayers

prouteCellRowNets

prouteCellRowRowEnd

Pin To Trunk Environment Variables

proutePinToTrunkAllLayers

proutePinToTrunkLayers

proutePinToTrunkMaxWireWidth

proutePinToTrunkMinTrunkWidth

proutePinToTrunkMinWireWidth

proutePinToTrunkNets

proutePinToTrunkSpecTLayer

proutePinToTrunkTrunkLayer

Stripes Environment Variables

prouteStripesBottomOffset

prouteStripesCenterLine

prouteStripesHorizDir

prouteStripesHorizLayers

prouteStripesLeftOffset

prouteStripesMinLength

prouteStripesNetClearance

prouteStripesNets

prouteStripesNetWidth

prouteStripesOffsetFrom

prouteStripesPinClearance

prouteStripesVertDir

prouteStripesVertLayers

prouteStripesXStep

prouteStripesYStep

Vias Environment Variables

prouteViaInsertionColumns

prouteViaInsertionCutArray

prouteViaInsertionLayerRange

prouteViaInsertionLayers

prouteViaInsertionLocation

prouteViaInsertionMaxLayer

prouteViaInsertionMinLayer

prouteViaInsertionNets

prouteViaInsertionRows

Tie Shield Environment Variables

prouteTieShieldCoaxTieFreq

prouteTieShieldShieldTieFreq

Pin to Trunk Environment Variables

Pin to Trunk Section

autoComposeTrunk

connectPinType

highLightTwigType

includeNonOrthogonalTwigs

orderTrunks

pinToTrunk

routingAreaLLx

routingAreaLLy

routingAreaURx

routingAreaURy

routingScope

selectEastTrunk

selectNorthTrunk

selectOrthoPinsMode

selectOverInstTrunk

selectSouthTrunk

selectTrunkMode

selectTrunkRangeValue

selectTrunkWithinRange

selectWestTrunk

trunkExtending

trunkTapering

trunkToTrunk

trunkTrimming

Trunk Section

extendTrunkDirMode

extendTrunkEndForOneDirMode

highlightTrunkHaloType

highlightTrunkHaloWidth

trimTrunkMode

trunkSetup

trunkSetupHorTrunkLayer

trunkSetupHorTrunkWidth

trunkSetupVerTrunkLayer

trunkSetupVerTrunkWidth

trunkTaperEdgeStyle

trunkTaperFirstIntervalLength

trunkTaperIntervalMode

trunkTaperMiddleIntervalLength

trunkTaperReductionMode

trunkTaperReductionPercent

trunkTaperReductionValue

trunkTaperSideMode

Twig Section

connectMultiPinShapes

gateTwigLayerMode

gateTwigWidthMode

horGateTwigLayer

horGateTwigWidth

horNonGateTwigLayer

horNonGateTwigWidth

mergeTapsInCloseProximity

nonGateTwigLayerMode

nonGateTwigWidthMode

pinStrapLayer

pinStrapLocationPreference

pinStrapMaxPinCount

pinStrapMaxPinDistance

pinStrapping

pinStrapPinLayer

pinStrapWidth

strapGateSourceDrainPins

tapCoverPinPercent

tapLowerViasCoverPinPercent

trunkOverDeviceViaCoverMode

trunkOverDeviceViaCoverPercent

twigLengthMatching

verGateTwigLayer

verGateTwigWidth

verNonGateTwigLayer

verNonGateTwigWidth

viaCoverPinWidth

Trunk to Trunk Section

connectTrunkType

C

Wire Assistant

Displaying and Hiding the Wire Assistant

Wire Assistant Graphical User Interface

Wire Assistant Title Bar Buttons

Wire Assistant Toolbar

Wire Assistant Sections

Wire Assistant Forms

Wire Assistant Visibility Form

Via Configuration Form

Trunk Mesh Routing Configuration Form (ICADVM18.1 EXL Only)

D

Preset File

E

Frequently Asked Questions

Frequently Asked Questions

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