B

Environment Variables

The system looks for the system-defined default settings in the following file:

install_dir/etc/tools/ia/.cdsenv

install_dir/etc/tools/layout/.cdsenv

install_dir/etc/tools/rte/.cdsenv

install_dir/etc/tools/p2t/.cdsenv

The following sections describe the environment variables that are used in the routing flow and to verify the routing connections.

Automatic Router Environment Variables

The following sections describe the environment variables used in automatic routing and wire assistant.

ia

blockTreatmentTreatAs

ia blockTreatmentTreatAs cyclic { "Automatic" | "Real Metal" | "Minimum Width Shape" }

Description

Ensures that all blockages have proper spacing properties and that the blockages model the metal on the edge of the block properly.

Automatic determines the blockage mode to be used according to the design style.
Real Metal treats blockages as metal and the spacing rules are applied based on blockage dimensions.
Minimum Width Shape treats blockages as metal with minimum width, regardless of the actual width of the blockage.

Default is Automatic.

GUI Equivalent

Command	Route – Design Setup – Blockage Treatment
Field	Default Blockage Model

Examples

envGetVal("ia" "blockTreatmentTreatAs")

envSetVal("ia" "blockTreatmentTreatAs" 'cyclic "Automatic")

envSetVal("ia" "blockTreatmentTreatAs" 'cyclic "Real Metal")

envSetVal("ia" "blockTreatmentTreatAs" 'cyclic "Minimum Width Shape")

busBitTableRows

ia busBitTableRows int integer_number

Description

The value specified for the environment variable is used to control the number of rows that are displayed in the bus bit table. By default, seven rows are displayed in the bus bit table.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Bus
Field	Bus Bit table

Examples

envGetVal("ia" "busBitTableRows")

envSetVal("ia" "busBitTableRows" 'int 10)

forceGlobalPlanning

ia forceGlobalPlanning boolean { t | nil }

Description

When set to t, allows forcing of global routing while in Device design style. Default is nil.

GUI Equivalent

Command

Window – Assitant – Wire Assistant – Automatic – Auto Route

Route – Design Setup – Auto Route

Form Field

Force Global Planning

Examples

envGetVal("ia" "forceGlobalPlanning")

envSetVal("ia" "forceGlobalPlanning" 'boolean t)

envSetVal("ia" "forceGlobalPlanning" 'boolean nil)

globalAllNets

ia globalAllNets boolean { t | nil }

Description

When set to t, forces the global router to use all nets even when routing a selected set of nets. Default is nil.

GUI Equivalent

Command

Window – Assitant – Wire Assistant – Automatic – Auto Route

Route – Design Setup – Auto Route

Form Field

Global Route All Nets

Examples

envGetVal("ia" "globalAllNets")

envSetVal("ia" "globalAllNets" 'boolean t)

envSetVal("ia" "globalAllNets" 'boolean nil)

globalIncludePreroutes

ia globalIncludePreroutes boolean { t | nil }

Description

Enables ECO flow routing with using existing pre-routes. This setting lets the router to use the existing floating pre-routes on a net to route the opens on the net.

Default is nil.

GUI Equivalent

None

Examples

envGetVal("ia" "globalAllNets")

envSetVal("ia" "globalAllNets" 'boolean t)

envSetVal("ia" "globalAllNets" 'boolean nil)

lockPreRoutes

ia lockPreRoutes boolean { t | nil }

Description

Allows for not locking the pre-routes. This is useful for ECO routes. Default is t.

GUI Equivalent

Command

Window – Assitant – Wire Assistant – Automatic – Auto Route

Route – Design Setup – Auto Route

Form Field

Preserve Pre-routes

Examples

envGetVal("ia" "lockPreRoutes")

envSetVal("ia" "lockPreRoutes" 'boolean t)

envSetVal("ia" "lockPreRoutes" 'boolean nil)

presetDefaultFile

ia presetDefaultFile string "file_names"

Description

Specifies the name of the preset file that is automatically loaded when Virtuoso starts. You need to specify the location of the preset file. The location of the preset file is one of following directories:

./.cadence/dfII/ia/presets
<$HOME>/.cadence/dfII/ia/presets
<$CDS_PROJECT>/dfII/ia/presets

Example:

ia  presetDefaultFile string ".cadence/dfII/ia/preset/myDefault.preset"

GUI Equivalent

None

Examples

envGetVal("ia" "presetDefaultFile")

envSetVal("ia" "presetDefaultFile" 'string "preset")

presetLoadMode

ia presetLoadMode cyclic { "setting" | "checking" }

Description

Controls the loading of the preset mode. This environment variable can take two values, setting and checking. Default is checking.

setting skips any preset entry that has an error and processes and loads only the entries that are error free.
checking processes the entries only if all the entries in the preset file are error free. If even one entry has an error, none of the entries are processed, even if all other entries are error free.

GUI Equivalent

Command

Window – Toolbar – Virtuoso Space-based Router

Window – Assistant – Wire Assistant

Field

VSR Load Preset icon

Examples

envGetVal("ia" "presetLoadMode")

envSetVal("ia" "presetLoadMode" 'cyclic "setting")

envSetVal("ia" "presetLoadMode" 'cyclic "checking")

presetResetMode

ia presetResetMode cyclic { "all" | "constraintOverrides" | "options" }

Description

Controls the default behavior of reset mode in the Wire Assistant. You can override the setting in the .cdsenv file in the home directory.

all resets all the override values in the Override Constraints and Automatic sections of the Wire Assistant.
constraintOverrides resets the override values in the Override Constraints section in the Wire Assistant.
options resets the override values of the VSR options.

Default is all.

GUI Equivalent

Command

Window – Toolbar – Virtuoso Space-based Router

Window – Assistant – Wire Assistant

Form Field

VSR Reset Options icon

Examples

envGetVal("ia" "presetResetMode")

envSetVal("ia" "presetResetMode" 'cyclic "all")

envSetVal("ia" "presetResetMode" 'cyclic "constraintOverrides")

envSetVal("ia" "presetResetMode" 'cyclic "options")

vsrFlow

ia vsrFlow string "flow_name"

Description

Lets you specify the flow command in the vsrFinal.il file. During routing, the values returned by envGetVal("ia" "vsrFlow") are: Congestion Map, Auto Route, Delete Routing, Optimize Route, Fix Errors, Tie Shield, Finish Route, Check Routability, or Common Utils. The return value can then be used in the SKILL code in the vsrFinal.il file to run the code specifically for the flow that is being entered. By default, it is null.

GUI Equivalent

None

Examples

envGetVal("ia" "vsrFlow")

envSetVal ("ia" "vsrFlow" 'string "Congestion")

envSetVal("ia" "vsrFlow" 'string "Fix Errors")

envSetVal("ia" "vsrFlow" 'string "Auto Route")

widthSpaceTableRows

ia widthSpaceTableRows int integer_number

Description

The value specified for the environment variable is used to control the number of rows that are displayed in the width spacing table of the Wire Assistant form. By default, three rows are displayed in the width spacing table. If the value specified in this variable is greater than the total poly and metal layers that are there in the technology file, then the Wire Assistant form uses the number of poly and metal layers in the technology file.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Net
Field	Width Spacing table

Examples

envGetVal("ia" "widthSpaceTableRows")

envSetVal("ia" "widthSpaceTableRows" 'int 100)

layout

adjustViatoWireEdge

layout adjustViatoWireEdge boolean { t | nil }

Description

Directs the router to move vias such that the edge of the metal layers in the vias overlap/align with the edges of the wires. This can reduce the number of small notches around vias.

GUI Equivalent

Command

Route – Design Setup – Optimization

Window – Assitant – Wire Assistant – Automatic – Optimization

Field

Align Via to Wire Edge

Examples

envGetVal("layout" "adjustViatoWireEdge")

envSetVal("layout" "adjustViatoWireEdge" 'boolean t)

envSetVal("layout" "adjustViatoWireEdge" 'boolean nil)

checkRoutabilityCreateExcludeSet

layout checkRoutabilityCreateExcludeSet boolean { t | nil }

Description

Enables you to exclude certain nets from routing. This can help the router skip any net that cannot be routed successfully; thereby, increasing the performance and reducing the routing time.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Verify – Design

Form Field

Exclude Types

Examples

envGetVal("layout" "checkRoutabilityCreateExcludeSet")

envSetVal("layout" "checkRoutabilityCreateExcludeSet" 'boolean t)

envSetVal("layout" "checkRoutabilityCreateExcludeSet" 'boolean nil)

checkRoutabilityMarkersLimit

layout checkRoutabilityMarkersLimit int integer_number

Description

Enables you to specify the maximum number of violations that can be reported in the Annotation Browser. Default is 1000.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Verify – Design

Form Field

Markers Limit per Type

Examples

envGetVal("layout" "checkRoutabilityMarkersLimit")

envSetVal("layout" "checkRoutabilityMarkersLimit" 'int 100)

checkRoutabilityMissingCoverObstruction

layout checkRoutabilityMissingCoverObstruction boolean { t | nil }

Description

Enables you to check for instances with missing blockage objects and cover obstructions. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Verify – Design

Form Field

Missing Cover Obstruction

Examples

envGetVal("layout" "checkRoutabilityMissingCoverObstruction")

envSetVal("layout" "checkRoutabilityMissingCoverObstruction" 'boolean t)

envSetVal("layout" "checkRoutabilityMissingCoverObstruction" 'boolean nil)

checkRoutabilityMissingPRBoundary

layout checkRoutabilityMissingPRBoundary boolean { t | nil }

Description

Enables you to check for instances with missing place and route boundary. Default is t.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Verify – Design

Form Field

Missing prBoundary

Examples

envGetVal("layout" "checkRoutabilityMissingPRBoundary")

envSetVal("layout" "checkRoutabilityMissingPRBoundary" 'boolean t)

envSetVal("layout" "checkRoutabilityMissingPRBoundary" 'boolean nil)

checkRoutabilityNotOnPRBoundaryEdge

layout checkRoutabilityNotOnPRBoundaryEdge boolean { t | nil }

Description

Checks for pins that are not on the edge of the place and route boundary. The default is nil.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assistant – Wire Assistant – Automatic – Routability Check

Verify – Design – Routability

Form Field

Not on prBoundary Edge/Pin not on prBoundary Edge

Examples

envGetVal("layout" "checkRoutabilityNotOnPRBoundaryEdge")

envSetVal("layout" "checkRoutabilityNotOnPRBoundaryEdge" 'boolean t)

checkRoutabilityPinOnGrid

layout checkRoutabilityPinOnGrid boolean { t | nil }

Description

When set to t, checks for pins that are off manufacturing grid. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Field

On Grid – Edge Only

Examples

envGetVal("layout" "checkRoutabilityPinOnGrid")

envSetVal("layout" "checkRoutabilityPinOnGrid" 'boolean t)

envSetVal("layout" "checkRoutabilityPinOnGrid" 'boolean nil)

checkRoutabilityPinCenterOnGrid

layout checkRoutabilityPinCenterOnGrid boolean { t | nil }

Description

When set to t, checks that the center of the pin is off manufacturing grid. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Field

On Grid – Edge and Center

Examples

envGetVal("layout" "checkRoutabilityPinCenterOnGrid")

envSetVal("layout" "checkRoutabilityPinCenterOnGrid" 'boolean t)

envSetVal("layout" "checkRoutabilityPinCenterOnGrid" 'boolean nil)

enableMaximizeCuts

layout enableMaximizeCuts boolean { t | nil }

Description

Lets you maximize the number of cuts in the layer overlap area. To avoid maximizing the number of cuts during routing, set this variable to nil before you begin routing. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Optimization

Window – Assitant – Wire Assistant – Net – Via Configuration

Form Field

Maximize Cuts

Examples

envGetVal("layout" "enableMaximizeCuts")

envSetVal("layout" "enableMaximizeCuts" 'boolean t)

envSetVal("layout" "enableMaximizeCuts" 'boolean nil)

enforceGapSpacingOnDiffPairVias

layout enforceGapSpacingOnDiffPairVias boolean { t | nil }

Description

Lets you force the application of gap spacing between consecutive vias of the differential pair. Default is t.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Net – Via Configuration
Field	Enforce Gap Spacing on Differential Pair Vias

Examples

envGetVal("layout" "enforceGapSpacingOnDiffPairVias")

envSetVal("layout" "enforceGapSpacingOnDiffPairVias" 'boolean t)

envSetVal("layout" "enforceGapSpacingOnDiffPairVias" 'boolean nil)

gapFillPurpose

layout gapFillPurpose string "purpose_name"

Description

Specifies the purpose of all modified or newly created SADPFillPatch shapes when synchronized back to OpenAccess. The default purpose is drawing.

GUI Equivalent

None

Examples

envGetVal("layout" "gapFillPurpose")

envSetVal("layout" "gapFillPurpose" 'string "drawing")

removePrerouteDangles

layout removePrerouteDangles boolean { t | nil }

Description

Removes any pre-existing dangles connected to the “from” point and “to” point of the current command. This check box is OFF by default.

Default is nil.

GUI Equivalent

Command

Route – Design Setup– Optimization

Window – Assistant – Wire Assistant – Automatic – Auto Route

Field

Remove Pre-Route Dangles

Examples

envGetVal("layout" "removePrerouteDangles")

envSetVal("layout" "removePrerouteDangles" 'boolean t)

envSetVal("layout" "removePrerouteDangles" 'boolean nil)

routeNetAtPinWidth

layout routeNetAtPinWidth boolean { t | nil }

Description

When set to TRUE, the Net Width to check box is selected by default.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Net tab
Field	Net Width to check box

Examples

envGetVal("layout" "routeNetAtPinWidth")

envSetVal("layout" "routeNetAtPinWidth" 'boolean t)

envSetVal("layout" "routeNetAtPinWidth" 'boolean nil)

routeNetAtPinWidthStyle

layout routeNetAtPinWidthStyle cyclic { "max_pin" | "min_pin" | "avg_pin" }

Description

Uses the specified pin width per net to route the non-taper section of the net.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Net tab
Field	Net Width to

Examples

envGetVal("layout" "routeNetAtPinWidthStyle")

envSetVal("layout" "routeNetAtPinWidthStyle" 'cyclic "max_pin")

envSetVal("layout" "routeNetAtPinWidthStyle" 'cyclic "min_pin")

envSetVal("layout" "routeNetAtPinWidthStyle" 'cyclic "avg_pin")

routeSelectedNets

layout routeSelectedNets boolean { t | nil }

Description

Starts automatic routing. Depending on whether the all nets or selected nets are selected, routing is performed on all nets in the current design or only on selected nets. Default is nil.

GUI Equivalent

Command	Window – Assistant – Wire Assistant – Automatic – Auto Route
Field	Route Net – Selected

Examples

envGetVal("layout" "routeSelectedNets")

envSetVal("layout" "routeSelectedNets" 'boolean t)

envSetVal("layout" "routeSelectedNets" 'boolean nil)

routeWithLowEffort

layout routeWithLowEffort boolean { t | nil }

Description

Enables the detail router to exit early when the average reduction ratios for opens and errors do not converge in consecutive passes. Default is t.

GUI Equivalent

Command

Route – Design Setup – Auto Route

Window – Assitant – Wire Assistant – Automatic – Auto Route

Field

Run With Low Effort

Examples

envGetVal("layout" "routeWithLowEffort")

envSetVal("layout" "routeWithLowEffort" 'boolean t)

envSetVal("layout" "routeWithLowEffort" 'boolean nil)

setTaperPinWidthNets

rte setTaperPinWidthNets boolean { t | nil }

Description

Enables the router to create pathSegs connecting to top-level pins or instPins using width matching the target pin. Default is nil.

GUI Equivalent

None

Examples

envGetVal("rte" "setTaperPinWidthNets")

envSetVal("rte" "setTaperPinWidthNets" 'boolean t)

envSetVal("rte" "setTaperPinWidthNets" 'boolean nil)

trimBridgePurpose

layout trimBridgePurpose string "purpose_name"

Description

Specifies the purpose of all modified or newly created bridgeMetal shapes when synchronized back to OpenAccess. The default purpose is drawing.

GUI Equivalent

None

Examples

envGetVal("layout" "trimBridgePurpose")

envSetVal("layout" "trimBridgePurpose" 'string "drawing")

useDoubleCutVias

layout useDoubleCutVias boolean { t | nil }

Description

Enables Automatic Routing, Net – Route, and the assisted routing commands to place double cut vias if the space allows. Default is nil.

GUI Equivalent

Command

Window – Assistant – Wire Assistant – Net – Via Configuration

Route – Design Setup – Optimization

Field

Attempt to Use Double Cut Vias

Examples

envGetVal("layout" "useDoubleCutVias")

envSetVal("layout" "useDoubleCutVias" 'boolean t)

envSetVal("layout" "useDoubleCutVias" 'boolean nil)

useWAOverrides

layout useWAOverrides boolean { t | nil }

Description

When selected, the overrides made in the Wire Assistant are applicable for automatic routing. Default is t.

GUI Equivalent

Command	Window – Assistant – Wire Assistant
Field	Override Constraints

Examples

envGetVal("layout" "useWAOverrides")

envSetVal("layout" "useWAOverrides" 'boolean t)

envSetVal("layout" "useWAOverrides" 'boolean nil)

viaMinNumCuts

layout viaMinNumCuts int integer_number

Description

The value specified for the environment variable is used to seed to numCuts widget of the WireAssistant in XL. This happens when VLS XL is started.

The changes of the Wire Assistant numCuts widget does not affect the environment variable and vice versa. Also, changing the value of the environment variable does not affect the Wire Assistant widget once VLS XL is started.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Net tab
Field	Min Num Cuts

Examples

envGetVal("layout" "viaMinNumCuts")

envSetVal("layout" "viaMinNumCuts" 'int 100)

viaWECutColumns

layout viaWECutColumns int integer_number

Description

Specifies the number of columns of via cuts that can override the minNumCut rule with a more explicit configuration for creating and editing wires.

The Rows and Columns field values are used by interactive routing commands, such as Create Wire and Create Bus. The combination of values must still be satisfied, however, can exceed the specified minimum number of cuts.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Net tab
Field	Col

Examples

envGetVal("layout" "viaWECutColumns")

envSetVal("layout" "viaWECutColumns" 'int 1)

viaWECutRows

layout viaWECutRows int integer_number

Description

Specifies the number of rows of via cuts that can override the minNumCut rule with a more explicit configuration for creating and editing wires.

GUI Equivalent

Command	Window – Assistant – Wire Assistant – Net tab
Field	Row

Examples

envGetVal("layout" "viaWECutRows")

envSetVal("layout" "viaWECutRows" 'int 1)

viaWECutSpecified

layout viaWECutSpecified boolean { t | nil }

Description

Lets you toggle between the minimum number of cuts field and number of cuts by rows and columns field and then allows you to specify the number of cuts in Row and Col fields, respectively. Default is nil.

GUI Equivalent

Command	Window – Assistant – Wire Assistant – Net tab
Field	Button next to Min Num Cuts

Examples

envGetVal("layout" "viaWECutSpecified")

envSetVal("layout" "viaWECutSpecified" 'boolean t)

envSetVal("layout" "viaWECutSpecified" 'boolean nil)

weBusBitShieldingGap

layout weBusBitShieldingGap float float_number

Description

Specifies the spacing value for the bus bit. Default is -1.0.

GUI Equivalent

Command	Window – Assistant – Wire Assistant – Bus tab
Field	Gap

Examples

envGetVal("layout" "weBusBitShieldingGap")

envSetVal("layout" "weBusBitShieldingGap" 'float 1.0)

weBusBitShieldingNetName

layout weBusBitShieldingNetName string "shielding_net_name"

Description

Specifies the shielding net ID. Default is “ “.

GUI Equivalent

Command	Window – Assistant – Wire Assistant – Bus tab
Field	Net

Examples

envGetVal("layout" "weBusBitShieldingNetName")

envSetVal("layout" "weBusBitShieldingNetName" 'string "netA")

weBusBitShieldingOption

layout weBusBitShieldingOption cyclic { "None" | "Default Lookup" | "Around Bus" | "Every Bit" }

Description

Specifies the shielding net mode. The three shielding modes that are supported are: None, Default Lookup, Around Bus, Every Bit. Default is Default Lookup.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Bus tab
Field	Add Shielding

Examples

envGetVal("layout" "weBusBitShieldingOption")

envSetVal("layout" "weBusBitShieldingOption" 'cyclic "None")

envSetVal("layout" "weBusBitShieldingOption" 'cyclic "Around Bus")

envSetVal("layout" "weBusBitShieldingOption" 'cyclic "Every Bit")

weBusBitShieldingWidth

layout weBusBitShieldingWidth float float_number

Description

Specifies the shielding width of the bus bit. Default is -1.0.

GUI Equivalent

Command	Window – Assitant – Wire Assistant – Bus t
Field	Width

Examples

envGetVal("layout" "weBusBitShieldingWidth")

envSetVal("layout" "weBusBitShieldingWidth" 'float 10.0)

rte

checkRoutabilityBlockage

rte checkRoutabilityBlockage boolean { t | nil }

Description

Checks for the pins blocked by top-level blockage or blockage of another instance.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Field

Pin Checks – Accessibility

Examples

envGetVal("rte" "checkRoutabilityBlockage")

envSetVal("rte" "checkRoutabilityBlockage" 'boolean t)

envSetVal("rte" "checkRoutabilityBlockage" 'boolean nil)

checkRoutabilityMinSpace

rte checkRoutabilityMinSpace boolean { t | nil }

Description

Directs the router to check for minimum pin spacing violations.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assitant – Wire Assistant – Automatic – Routability Check

Field

Pin Checks – Spacing

Examples

envGetVal("rte" "checkRoutabilityMinSpace")

envSetVal("rte" "checkRoutabilityMinSpace" 'boolean t)

envSetVal("rte" "checkRoutabilityMinSpace" 'boolean nil)

checkRoutabilityMinWidth

rte checkRoutabilityMinWidth boolean { t | nil }

Description

Directs the router to check for minimum pin width violations.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assistant – Wire Assistant – Automatic – Routability Check

Field

Pin Checks – Width

Examples

envGetVal("rte" "checkRoutabilityMinWidth")

envSetVal("rte" "checkRoutabilityMinWidth" 'boolean t)

envSetVal("rte" "checkRoutabilityMinWidth" 'boolean nil)

checkRoutabilityVia

rte checkRoutabilityVia boolean { t | nil }

Description

Directs the router to check for via escapes.

GUI Equivalent

Command

Route – Design Setup – Routability Check

Window – Assistant – Wire Assistant – Automatic – Routability Check

Field

Pin Checks – Accessibility

Examples

envGetVal("rte" "checkRoutabilityVia")

envSetVal("rte" "checkRoutabilityVia" 'boolean t)

envSetVal("rte" "checkRoutabilityVia" 'boolean nil)

coverObsMasterTooltipLimit

rte coverObsMasterTooltipLimit int integer_number

Description

When the number of masters in the layout exceeds the limit specified using the coverObsMasterTooltipLimit environment variable, the Cover Obstructions Manager form does not provide the list of master's instance tooltip. This environment variable has been added to improve the performance when working with large layout designs. Default is 20.

GUI Equivalent

None

Examples

envGetVal("rte" "coverObsMasterTooltipLimit")

envSetVal("rte" "coverObsMasterTooltipLimit" 'int 100)

coverObstUnhiliteOnFormClosed

rte coverObstUnhiliteOnFormClosed boolean { t | nil }

Description

When set to t, it automatically unhighlights all cover obstructions when the Cover Obstruction Manager form is closed. When set to nil, the cover obstructions highlight color continues to display in the layout window even after the Cover Obstruction Manager form is closed. Default is nil.

GUI Equivalent

None

Examples

envGetVal("rte" "coverObstUnhiliteOnFormClosed")

envSetVal("rte" "coverObstUnhiliteOnFormClosed" 'boolean t)

envSetVal("rte" "coverObstUnhiliteOnFormClosed" 'boolean nil)

deleteRoutingKeepFigGroupShapes

rte deleteRoutingKeepFigGroupShapes boolean { t | nil }

Description

Directs the router to retain the fig group shapes when deleting the routing topology. The default value is t. When set to nil, the routing within fig groups is deleted.

GUI Equivalent

Command

Route – Design Setup – Delete Routing

Window – Assistant – Wire Assistant – Automatic – Delete Routing

Field

Keep Fig Group Shapes

Examples

envGetVal("rte" "deleteRoutingKeepFigGroupShapes")

envSetVal("rte" "deleteRoutingKeepFigGroupShapes" 'boolean t)

envSetVal("rte" "deleteRoutingKeepFigGroupShapes" 'boolean nil)

deleteRoutingKeepPower

rte deleteRoutingKeepPower boolean { t | nil }

Description

Directs the router to keep the routed power nets when deleting the routing topology.

GUI Equivalent

Command

Route – Design Setup – Delete Routing

Window – Assistant – Wire Assistant – Automatic – Delete Routing

Field

Keep Power Nets

Examples

envGetVal("rte" "deleteRoutingKeepPower")

envSetVal("rte" "deleteRoutingKeepPower" 'boolean t)

envSetVal("rte" "deleteRoutingKeepPower" 'boolean nil)

extractedPinStyle

rte extractedPinStyle cyclic { "Labeled Shapes Only" | "Connected Shapes on Same Layer" | "Whole Net on Routing Layers" }

Description

Lets you control which shapes should be converted into a pin shape. The shapes that are labeled or connected are extracted as pin shapes.

Labeled Shapes Only only the shapes that are marked by text or property to become pin shapes. This option is selected by default.
Connected Shapes On Same Layer only the marked shapes and the shapes that are recursively connected to become pin shapes.
Whole Net on Routing Layers all the shapes in the net to become pin shapes.

Default is Labeled Shapes Only.

GUI Equivalent

Command	Route – Design Setup
Field	Extracted Pin Style

Examples

envGetVal("rte" "extractedPinStyle")

envSetVal("rte" "extractedPinStyle" 'cyclic "Labeled Shapes Only")

envSetVal("rte" "extractedPinStyle" 'cyclic "Connected Shapes on Same Layer")

envSetVal("rte" "extractedPinStyle" 'cyclic "Whole Net on Routing Layers")

fixErrorsErrorTypesExtension

rte fixErrorsErrorTypesExtension boolean { t | nil }

Description

Directs the router to fix all extension violations based on the extension constraints defined in the design , such as minOppExtension and minExtensionEdge constraints. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assistant – Wire Assistant – Automatic – Fix Violations

Field

Extension

Examples

envGetVal("rte" "fixErrorsErrorTypesExtension")

envSetVal("rte" "fixErrorsErrorTypesExtension" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesExtension" 'boolean nil)

fixErrorsFixMinAreaAtPins

rte fixErrorsFixMinAreaAtPins boolean { t | nil }

Description

Directs the router to fix the minimum area violations. Default is t.

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assistant – Wire Assistant – Automatic – Fix Violations

Field

Minimum Spacing

Examples

envGetVal("rte" "fixErrorsFixMinAreaAtPins")

envSetVal("rte" "fixErrorsFixMinAreaAtPins" 'boolean t)

envSetVal("rte" "fixErrorsFixMinAreaAtPins" 'boolean nil)

fixErrorsErrorTypesMinArea

rte fixErrorsErrorTypesMinArea boolean { t | nil }

Description

Directs the router to fix the minArea rule violations. Default is t

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assistant – Wire Assistant – Automatic – Fix Violations

Field

Minimum Area

Examples

envGetVal("rte" "fixErrorsErrorTypesMinArea")

envSetVal("rte" "fixErrorsErrorTypesMinArea" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesMinArea" 'boolean nil)

fixErrorsErrorTypesMinEnclArea

rte fixErrorsErrorTypesMinEnclArea boolean { t | nil }

Description

Directs the router to fix the minEnclosedArea rule violations. Default is t

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assistant – Wire Assistant – Automatic – Fix Violations

Field

Minimum Enclosed Area

Examples

envGetVal("rte" "fixErrorsErrorTypesMinEnclArea")

envSetVal("rte" "fixErrorsErrorTypesMinEnclArea" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesMinEnclArea" 'boolean nil)

fixErrorsErrorTypesMinEdge

rte fixErrorsErrorTypesMinEdge boolean { t | nil }

Description

Directs the router to fix the minEdgeLength rule violations. Default is t

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assistant – Wire Assistant – Automatic – Fix Violations

Field

Minimum Edge

Examples

envGetVal("rte" "fixErrorsErrorTypesMinEdge")

envSetVal("rte" "fixErrorsErrorTypesMinEdge" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesMinEdge" 'boolean nil)

fixErrorsErrorTypesMinWidth

rte fixErrorsErrorTypesMinWidth boolean { t | nil }

Description

Directs the router to fix the minWidth rule violations. Default is t.

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assitant – Wire Assistant – Automatic – Fix Violations

Field

Minimum Width

Examples

envGetVal("rte" "fixErrorsErrorTypesMinWidth")

envSetVal("rte" "fixErrorsErrorTypesMinWidth" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesMinWidth" 'boolean nil)

fixErrorsErrorTypesRGrid

rte fixErrorsErrorTypesRGrid boolean { t | nil }

Description

Directs the router to fix the routing grid violations. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assitant – Wire Assistant – Automatic – Fix Violations

Field

Routing Grid

Examples

envGetVal("rte" "fixErrorsErrorTypesRGrid")

envSetVal("rte" "fixErrorsErrorTypesRGrid" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesRGrid" 'boolean nil)

fixErrorsErrorTypesNumCut

rte fixErrorsErrorTypesNumCut boolean { t | nil }

Description

Directs the router to fix the minNumCut rule violations. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assitant – Wire Assistant – Automatic – Fix Violations

Field

Minimum Number of Cuts

Examples

envGetVal("rte" "fixErrorsErrorTypesNumCut")

envSetVal("rte" "fixErrorsErrorTypesNumCut" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesNumCut" 'boolean nil)

fixErrorsErrorTypesSameMaskSpacing

rte fixErrorsErrorTypesSameMaskSpacing boolean { t | nil }

Description

When set to t, attempts to fix same mask spacing spacing and cut class spacing violations. Default is nil.

GUI Equivalent

Command

Route – Design Setup – Fix Violations

Window – Assitant – Wire Assistant – Automatic – Fix Violations

Field

Same Mask Spacing

Examples

envGetVal("rte" "fixErrorsErrorTypesSameMaskSpacing")

envSetVal("rte" "fixErrorsErrorTypesSameMaskSpacing" 'boolean t)

envSetVal("rte" "fixErrorsErrorTypesSameMaskSpacing" 'boolean nil)

genRoutingStyle

rte genRoutingStyle cyclic { "Automatic" | "Device" | "ASIC" | "Chip Assembly" }

Description

Specifes the routing style for the design to be routed. The routing styles that are supported are: Device Level, ASIC, and Chip Assembly.

Automatic is determined based on the size of the layout and the composition of macro instances. This evaluation happens when the design is first processed by the routing commands. The design style is retained until explicitly re-evaluated using the Refresh button to the right of the design style field.
Device used when you need to route device-level and smaller designs that do not require congestion planning.
ASIC used when you need to route custom digital, standard cell, and ASIC designs that require congestion planning.
Chip Assembly used when you need to route chip assembly and larger designs that contain large macros and require congestion planning.

Default is Automatic.

GUI Equivalent

Command

Route – Design Setup

Window – Assitant – Wire Assistant – Automatic

Field

Design Style

Examples

envGetVal("rte" "genRoutingStyle")

envSetVal("rte" "genRoutingStyle" 'cyclic "Automatic")

envSetVal("rte" "genRoutingStyle" 'cyclic "Device")

envSetVal("rte" "genRoutingStyle" 'cyclic "ASIC")

envSetVal("rte" "genRoutingStyle" 'cyclic "Chip Assembly")

optimizeRouteReduceVias

rte optimizeRouteReduceVias boolean { t | nil }

Description

Directs the router to reduce the number of vias by increasing the number of small same layer jogs.

GUI Equivalent

Command

Route – Design Setup – Optimization

Window – Assitant – Wire Assistant – Automatic – Optimization

Field

Reduce Jogs Through Vias

Examples

envGetVal("rte" "optimizeRouteReduceVias")

envSetVal("rte" "optimizeRouteReduceVias" 'boolean t)

envSetVal("rte" "optimizeRouteReduceVias" 'boolean nil)

routeSearchAndRepair

rte routeSearchAndRepair boolean { t | nil }

Description

Directs the router to search for and attempt to fix same net and different net spacing violations. The default value is nil.

GUI Equivalent

Command

Route – Design Setup – Optimization

Window – Assitant – Wire Assistant – Automatic – Optimization

Field

Minimum Spacing

Examples

envGetVal("rte" "routeSearchAndRepair")

envSetVal("rte" "routeSearchAndRepair" 'boolean t)

envSetVal("rte" "routeSearchAndRepair" 'boolean nil)

routingScriptingDir

rte routingScriptingDir string "directoryName"

Description

Sets the default RDE directories that store the routing scripts. Once this environment variable is set, the available directories appear in the Select a Routing Script form. For more information, refer to Routing Scripts.

The default is .:rde:.cadence/dfII/rde:~/rde:$(INSTALLDIR)/samples/rde, where directory is separated by a colon(:).

GUI Equivalent

Command	Route – Routing Script – Browse
Field	Directories

Examples

envGetVal("rte" "routingScriptingDir")

envSetVal("rte" "routingScriptingDir" 'string "dir1")

Power Routing Environment Variables

The following sections describe the environment variables used in power routing.

General Environment Variables

prouteSelectScheme

rte prouteSelectScheme string "scheme_name"

Description

Defines the scheme name for the power routing operation.

GUI Equivalent

Command	Route – Power Routing
Field	Scheme – Name

Examples

envGetVal("rte" "proutePadRingAllLayers")

envSetVal("rte" "proutePadRingAllLayers" 'string "schemeA")

Pad Ring Environment Variables

proutePadRingAllLayers

rte proutePadRingAllLayers boolean { t | nil }

Description

Routes pad rings on all routing layers. The default value is t.

GUI Equivalent

Command	Route – Power Routing – Pad Ring tab
Field	Specified Pin Layers (unselected)

Examples

envGetVal("rte" "proutePadRingAllLayers")

envSetVal("rte" "proutePadRingAllLayers" 'boolean t)

envSetVal("rte" "proutePadRingAllLayers" 'boolean nil)

proutePadRingEdgePins

rte proutePadRingEdgePins boolean { t | nil }

Description

Routes to the pin edge. Values are t or nil. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Pad Ring tab
Field	Edge Pins

Examples

envGetVal("rte" "proutePadRingEdgePins")

envSetVal("rte" "proutePadRingEdgePins" 'boolean t)

envSetVal("rte" "proutePadRingEdgePins" 'boolean nil)

proutePadRingLayers

rte proutePadRingLayers string "layer_names"

Description

The layers to use to connect pad pins. Value is a string with one or more layer name separated by space character. If the string is empty, the router uses the first routable layer in the design.
The ?allRouteLayers argument must be set to nil to use this argument.

GUI Equivalent

Command	Route – Power Routing – Pad Ring tab
Field	Specified Pin Layers (selected)

Examples

envGetVal("rte" "proutePadRingLayers")

envSetVal("rte" "proutePadRingLayers" 'string "Metal11 Metal12 Metal13 Metal14")

proutePadRingNets

rte proutePadRingNets string "net_name"

Description

Declares power and ground nets for pad ring power route.

GUI Equivalent

None

Examples

envGetVal("rte" "proutePadRingNets")

envSetVal("rte" "proutePadRingNets" 'string "net1 net2")

proutePadRingRailPins

rte proutePadRingRailPins boolean { t | nil }

Description

Routes to rail pins on the pads. Values are t or nil. The default value is t.

GUI Equivalent

Command	Route – Power Routing – Pad Ring tab
Field	Rail Pins

Examples

envGetVal("rte" "proutePadRingRailPins")

envSetVal("rte" "proutePadRingRailPins" 'boolean t)

envSetVal("rte" "proutePadRingRailPins" 'boolean nil)

Block Ring Environment Variables

powerRouteSingleRing

rte powerRouteSingleRing boolean { t | nil }

Description

Specifies that the block rings are executed individually on each block. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Blocks – Style

Examples

envGetVal("rte" "powerRouteSingleRing")

envSetVal("rte" "powerRouteSingleRing" 'boolean t)

envSetVal("rte" "powerRouteSingleRing" 'boolean nil)

prouteBlockRingBlockClearance

rte prouteBlockRingBlockClearance float float_number

Description

Separates the block rings and prBoundary of the block instance by this value. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Block Clearance

Examples

envGetVal("rte" "prouteBlockRingBlockClearance")

envSetVal("rte" "prouteBlockRingBlockClearance" 'float 1.0)

prouteBlockRingChannels

rte prouteBlockRingChannels boolean { t | nil }

Description

Adds rails in the channels between block instances. Values are t or nil. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Routing Style/Channel

Examples

envGetVal("rte" "prouteBlockRingChannels")

envSetVal("rte" "prouteBlockRingChannels" 'boolean t)

envSetVal("rte" "prouteBlockRingChannels" 'boolean nil)

prouteBlockRingContour

rte prouteBlockRingContour boolean { t | nil }

Description

Causes power nets to follow the contour of block instances. Values are t or nil. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Routing Style/Contour

Examples

envGetVal("rte" "prouteBlockRingContour")

envSetVal("rte" "prouteBlockRingContour" 'boolean t)

envSetVal("rte" "prouteBlockRingContour" 'boolean nil)

prouteBlockRingHorizLayer

rte prouteBlockRingHorizLayer string "layer_names"

Description

The horizontal metal layer to use to route the core ring. Value is a layer string.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Horizontal Routing Layer

Examples

envGetVal("rte" "prouteBlockRingHorizLayer")

envSetVal("rte" "prouteBlockRingHorizLayer" 'string "Metal1 Metal3 Metal5")

prouteBlockRingLattice

rte prouteBlockRingLattice boolean { t | nil }

Description

Extends duplicated net segments to or from a lattice. Values are t or nil. If set to nil, the segments are concentric. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Routing Style/Lattice Style

Examples

envGetVal("rte" "prouteBlockRingLattice")

envSetVal("rte" "prouteBlockRingLattice" 'boolean t)

envSetVal("rte" "prouteBlockRingLattice" 'boolean nil)

prouteBlockRingNetClearance

rte prouteBlockRingNetClearance float float_number

Description

The minimum clearance between any two power nets. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Ring Clearance

Examples

envGetVal("rte" "prouteBlockRingNetClearance")

envSetVal("rte" "prouteBlockRingNetClearance" 'float 1.0)

prouteBlockRingNets

rte prouteBlockRingNets string "net_name"

Description

Declares power and ground nets for block ring power route.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Net Ordering

Examples

envGetVal("rte" "prouteBlockRingNets")

envSetVal("rte" "prouteBlockRingNets" 'string "net2 net3")

prouteBlockRingNetWidth

rte prouteBlockRingNetWidth float float_number

Description

The minimum width between any two power nets. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Ring Width

Examples

envGetVal("rte" "prouteBlockRingNetWidth")

envSetVal("rte" "prouteBlockRingNetWidth" 'float 1.0)

prouteBlockRingVertLayer

rte prouteBlockRingVertLayer string "layer_names"

Description

The vertical metal layer to use to route the core ring. Value is a layer string.

GUI Equivalent

Command	Route – Power Routing – Block Ring tab
Field	Vertical Routing Layer

Examples

envGetVal("rte" "prouteBlockRingVertLayer")

envSetVal("rte" "prouteBlockRingVertLayer" 'string "Metal2 Metal4 Metal6")

Core Ring Environment Variables

prouteCoreRingRingAtCenter

rte prouteCoreRingRingAtCenter boolean { t | nil }

Description

Routes a ring between the core area of the design and the surrounding pad instances. Values are t or nil. If nil, the ring is routed according to the setting of the ?relativeTo argument. The default value is t.

GUI Equivalent

Command	Route – Power Routing – Edit – Core Ring tab
Field	Centered between Core and Pads

Examples

envGetVal("rte" "prouteCoreRingRingAtCenter")

envSetVal("rte" "prouteCoreRingRingAtCenter" 'boolean t)

envSetVal("rte" "prouteCoreRingRingAtCenter" 'boolean nil)

prouteCoreRingCoreClearance

rte prouteCoreRingCoreClearance float float_number

Description

Use when ?relativeTo is set to 'outsideCore. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Clearance, Core (Outside)

Examples

envGetVal("rte" "prouteCoreRingCoreClearance")

envSetVal("rte" "prouteCoreRingCoreClearance" 'float 1.0)

prouteCoreRingHorizLayer

rte prouteCoreRingHorizLayer string "layer_names"

Description

The horizontal metal layer to be used to route the core ring. Value is a layer string.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Horizontal Routing Layer

Examples

envGetVal("rte" "prouteCoreRingHorizLayer")

envSetVal("rte" "prouteCoreRingHorizLayer" 'string "Metal1 Metal3 Metal5")

prouteCoreRingInAreaClearance

rte prouteCoreRingInAreaClearance float float_number

Description

Use when ?relativeTo is set to 'insideRegion. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Clearance, Specific Region (inside)

Examples

envGetVal("rte" "prouteCoreRingInAreaClearance")

envSetVal("rte" "prouteCoreRingInAreaClearance" 'float 1.0)

prouteCoreRingLattice

rte prouteCoreRingLattice boolean { t | nil }

Description

Extends duplicate net segments to or from a lattice. Values are t or nil. If set to nil, the segments are concentric. The default value is nil/Concentric Rings.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Routing Style

Examples

envGetVal("rte" "prouteCoreRingLattice")

envSetVal("rte" "prouteCoreRingLattice" 'boolean t)

envSetVal("rte" "prouteCoreRingLattice" 'boolean nil)

prouteCoreRingNetClearance

rte prouteCoreRingNetClearance float float_number

Description

The minimum clearance between any two power nets. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Ring Clearance

Examples

envGetVal("rte" "prouteCoreRingNetClearance")

envSetVal("rte" "prouteCoreRingNetClearance" 'float 1.0)

prouteCoreRingNets

rte prouteCoreRingNets string "net_name"

Description

Declares power and ground nets for core ring power route.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Net Ordering

None

Examples

envGetVal("rte" "prouteCoreRingNets")

envSetVal("rte" "prouteCoreRingNets" 'string "netA netB")

prouteCoreRingNetWidth

rte prouteCoreRingNetWidth float float_number

Description

The minimum width between any two power nets. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Ring Width

Examples

envGetVal("rte" "prouteCoreRingNetWidth")

envSetVal("rte" "prouteCoreRingNetWidth" 'float 1.0)

prouteCoreRingOutAreaClearance

rte prouteCoreRingOutAreaClearance float float_number

Description

Use when ?relativeTo is set to 'outsideRegion. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Clearance, Specific Region (outside)

Examples

envGetVal("rte" "prouteCoreRingOutAreaClearance")

envSetVal("rte" "prouteCoreRingOutAreaClearance" 'float 1.0)

prouteCoreRingPadClearance

rte prouteCoreRingPadClearance float float_number

Description

Use when ?relativeTo is set to 'insideIOPads. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Clearance, I/O Pads (inside)

Examples

envGetVal("rte" "prouteCoreRingPadClearance")

envSetVal("rte" "prouteCoreRingPadClearance" 'float 1.0)

prouteCoreRingRelativeTo

rte prouteCoreRingRelativeTo cyclic { "Core (outside)" | "I/O Pads (inside)" | "Specific Region (inside)" | "Specific Region (outside)" }

Description

The location of the ring is relative to the specified location. The values are the following:

'insideIOPads
'outsideCore
'insideRegion
'outsideRegion

With insideRegion or outsideRegion, also specify the region using the ?areaX/YLo and ?areaX/YHi arguments.

You must also specify a positive, nonzero clearance value using one of the following four variables.

The default value is Core (outside).

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Relative To

Examples

envGetVal("rte" "prouteCoreRingRelativeTo")

envSetVal("rte" "prouteCoreRingRelativeTo" 'cyclic "Core (outside)")

envSetVal("rte" "prouteCoreRingRelativeTo" 'cyclic "I/O Pads (inside)")

envSetVal("rte" "prouteCoreRingRelativeTo" 'cyclic "Specific Region (inside)")

envSetVal("rte" "prouteCoreRingRelativeTo" 'cyclic "Specific Region (outside)")

prouteCoreRingRTXHi

rte prouteCoreRingRTXHi float float_number

Description

Use to specify the region if ?relativeTo is set to either 'insideRegion or 'outsideRegion. Value is a floating number that must be within the prBoundary of the design. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Coordinates XHi

Examples

envGetVal("rte" "prouteCoreRingRTXHi")

envSetVal("rte" "prouteCoreRingRTXHi" 'float 1.0)

prouteCoreRingRTXLo

rte prouteCoreRingRTXLo float float_number

Description

Use to specify the region if ?relativeTo is set to either 'insideRegion or 'outsideRegion. Value is a floating number that must be within the prBoundary of the design. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Coordinates XLo

Examples

envGetVal("rte" "prouteCoreRingRTXLo")

envSetVal("rte" "prouteCoreRingRTXLo" 'float 1.0)

prouteCoreRingRTYHi

rte prouteCoreRingRTYHi float float_number

Description

Use to specify the region if ?relativeTo is set to either 'insideRegion or 'outsideRegion. Value is a floating number that must be within the prBoundary of the design. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Coordinates YHi

Examples

envGetVal("rte" "prouteCoreRingRTYHi")

envSetVal("rte" "prouteCoreRingRTYHi" 'float 1.0)

prouteCoreRingRTYLo

rte prouteCoreRingRTYLo float float_number

Description

Use to specify the region if ?relativeTo is set to either 'insideRegion or 'outsideRegion. Value is a floating number that must be within the prBoundary of the design. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Coordinates YLo

Examples

envGetVal("rte" "prouteCoreRingRTYLo")

envSetVal("rte" "prouteCoreRingRTYLo" 'float 1.0)

prouteCoreRingVertLayer

rte prouteCoreRingVertLayer string "layer_names"

Description

The vertical metal layer to be used to route the core ring. Value is a layer string.

GUI Equivalent

Command	Route – Power Routing – Core Ring tab
Field	Vertical Routing Layer

Examples

envGetVal("rte" "prouteCoreRingVertLayer")

envSetVal("rte" "prouteCoreRingVertLayer" 'string "Metal2 Metal4 Metal6")

Cell Row Environment Variables

prouteCellRowExtend

rte prouteCellRowExtend boolean { t | nil }

Description

Routes the cell rows to the power rail. If more than one rail exists, routes to the farthest rail. Values are t or nil. The default value is t.

GUI Equivalent

Command	Route – Power Routing – Cell Rows tab
Field	Extend Straps to Rails

Examples

envGetVal("rte" "prouteCellRowExtend")

envSetVal("rte" "prouteCellRowExtend" 'boolean t)

envSetVal("rte" "prouteCellRowExtend" 'boolean nil)

prouteCellRowLayers

rte prouteCellRowLayers string "layer_names"

Description

The layers to use to route the cell rows. Value is a list of layer strings. Separate layers with spaces. If the string is empty, the router uses the first routable layer in the design.
The ?allRouteLayers argument must be set to nil to use this argument.

GUI Equivalent

Command	Route – Power Routing – Cell Rows tab
Field	Specified Routing Layers (selected)

Examples

envGetVal("rte" "prouteCellRowLayers")

envSetVal("rte" "prouteCellRowLayers" 'string "Metal1 Metal2 Metal3 Metal4")

prouteCellRowNets

rte prouteCellRowNets string "net_name"

Description

Declares power and ground nets for cell row power route.

GUI Equivalent

None

Examples

envGetVal("rte" "prouteCellRowNets")

envSetVal("rte" "prouteCellRowNets" 'string "netB netC")

prouteCellRowRowEnd

rte prouteCellRowRowEnd boolean { t | nil }

Description

Routes standard cells to the end of defined rows. Values are t or nil. If nil, standard cells are routed to the last cell in the row. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Cell Rows tab
Field	Boundary Rule – End of Row

Examples

envGetVal("rte" "prouteCellRowRowEnd")

envSetVal("rte" "prouteCellRowRowEnd" 'boolean t)

envSetVal("rte" "prouteCellRowRowEnd" 'boolean nil)

Pin To Trunk Environment Variables

proutePinToTrunkAllLayers

rte proutePinToTrunkAllLayers boolean { t | nil }

Description

Uses all layers for pin to trunk routing. Values are t or nil. If nil, the router uses the layers specified by the ?pinLayers argument. The default value is t.

GUI Equivalent

Command	Route – Power Routing – Pin To Trunk tab
Field	Specified Pin Layers (unselected)

Examples

envGetVal("rte" "proutePinToTrunkAllLayers")

envSetVal("rte" "proutePinToTrunkAllLayers" 'boolean t)

envSetVal("rte" "proutePinToTrunkAllLayers" 'boolean nil)

proutePinToTrunkLayers

rte proutePinToTrunkLayers string "layer_names"

Description

The layers to use for pin to trunk routing. Value is a list of layer strings. Separate layers with spaces. If the string is empty, the router uses the first routable layer in the design.

The ?allPinLayers argument must be set to nil to use this argument.

GUI Equivalent

Command	Route – Power Routing – Pin To Trunk tab
Field	Specified Pin Layers (selected)

Examples

envGetVal("rte" "proutePinToTrunkLayers")

envSetVal("rte" "proutePinToTrunkLayers" 'string "Metal1 Metal2 Metal3 Metal4")

proutePinToTrunkMaxWireWidth

rte proutePinToTrunkMaxWireWidth float float_number

Description

The maximum wire width for pin to trunk connection. Value is a positive, nonzero, floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Pin To Trunk tab
Field	Maximum Wire Width

Examples

envGetVal("rte" "proutePinToTrunkMaxWireWidth")

envSetVal("rte" "proutePinToTrunkMaxWireWidth" 'float 1.0)

proutePinToTrunkMinTrunkWidth

rte proutePinToTrunkMinTrunkWidth float float_number

Description

The minimum width of a target trunk for pin to trunk connection. Value is a positive, nonzero, floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Pin To Trunk tab
Field	Minimum Trunk Width

Examples

envGetVal("rte" "proutePinToTrunkMinTrunkWidth")

envSetVal("rte" "proutePinToTrunkMinTrunkWidth" 'float 1.0)

proutePinToTrunkMinWireWidth

rte proutePinToTrunkMinWireWidth float float_number

Description

The minimum wire width for pin to trunk connection. Value is a positive, nonzero, floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Pin To Trunk tab
Field	Minimum Wire Width

Examples

envGetVal("rte" "proutePinToTrunkMinWireWidth")

envSetVal("rte" "proutePinToTrunkMinWireWidth" 'float 1.0)

proutePinToTrunkNets

rte proutePinToTrunkNets string "net_name"

Description

Declares power and ground nets for pin to trunk power route.

GUI Equivalent

None

Examples

envGetVal("rte" "proutePinToTrunkNets")

envSetVal("rte" "proutePinToTrunkNets" 'string "netC netD")

proutePinToTrunkSpecTLayer

rte proutePinToTrunkSpecTLayer boolean { t | nil }

Description

Uses the trunk layer for routing . Values are t or nil. If set to t, ?trunkLayer must contain a valid routing layer. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Pin To Trunk tab
Field	Specified Trunk Layer (unselected)

Examples

envGetVal("rte" "proutePinToTrunkSpecTLayer")

envSetVal("rte" "proutePinToTrunkSpecTLayer" 'boolean t)

envSetVal("rte" "proutePinToTrunkSpecTLayer" 'boolean nil)

proutePinToTrunkTrunkLayer

rte proutePinToTrunkTrunkLayer string "layer_names"

Description

Uses this layer as the trunk layer. Value is a layer string.

GUI Equivalent

Command	Route – Power Routing – Pin To Trunk tab
Field	Specified Trunk Layer (selected)

Examples

envGetVal("rte" "proutePinToTrunkTrunkLayer")

envSetVal("rte" "proutePinToTrunkTrunkLayer" 'string "Metal1 Metal2 Metal3 Metal4")

Stripes Environment Variables

prouteStripesBottomOffset

rte prouteStripesBottomOffset float float_number

Description

When ?offsetFrom is set to 'designBoundary, use this value as the y location for the first horizontal stripe relative to the bottom of the design area.

When ?offsetFrom is set to 'origin, use this value as the x location for the first vertical stripe relative to the design origin.

When ?offsetFrom is set to 'routingArea, this value has no affect.

The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Bottom

Examples

envGetVal("rte" "prouteStripesBottomOffset")

envSetVal("rte" "prouteStripesBottomOffset" 'float 1.0)

prouteStripesCenterLine

rte prouteStripesCenterLine boolean { t | nil }

Description

Uses the centerline of the stripes for offset measurement. Value is t or nil. If nil, the offset is measured from the left edge for the first vertical strip and from the bottom edge for the first horizontal stripe.

The default value is nil (Edge of Stripe).

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Relative To

Examples

envGetVal("rte" "prouteStripesCenterLine")

envSetVal("rte" "prouteStripesCenterLine" 'boolean t)

envSetVal("rte" "prouteStripesCenterLine" 'boolean nil)

prouteStripesHorizDir

rte prouteStripesHorizDir boolean { t | nil }

Description

Creates horizontal stripes. Values are t or nil. The default value is t.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Horizontal Stripes

Examples

envGetVal("rte" "prouteStripesHorizDir")

envSetVal("rte" "prouteStripesHorizDir" 'boolean t)

envSetVal("rte" "prouteStripesHorizDir" 'boolean nil)

prouteStripesHorizLayers

rte prouteStripesHorizLayers string "layer_names"

Description

Use the specified horizontal layers to route the horizontal stripes. ?horiStripes must be set to t for this argument to take affect. Value is a list of horizontal metal layers. Separate layers with spaces. If the string is empty, the router uses the first routable layer in the design.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Routing Layers

Examples

envGetVal("rte" "prouteStripesHorizLayers")

envSetVal("rte" "prouteStripesHorizLayers" 'string "Metal1 Metal2 Metal3 Metal4")

prouteStripesLeftOffset

rte prouteStripesLeftOffset float float_number

Description

When ?offsetFrom is set to 'designBoundary, use this value as the x location for the first vertical stripe relative to the left of the design area.

When ?offsetFrom is set to 'origin, use this value as the y location for the first horizontal stripe relative to the design origin.

When ?offsetFrom is set to 'routingArea, this value has no affect.

The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Left

Examples

envGetVal("rte" "prouteStripesLeftOffset")

envSetVal("rte" "prouteStripesLeftOffset" 'float 1.0)

prouteStripesMinLength

rte prouteStripesMinLength float float_number

Description

Minimum stripe length. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Minimum Stripe Length

Examples

envGetVal("rte" "prouteStripesMinLength")

envSetVal("rte" "prouteStripesMinLength" 'float 1.0)

prouteStripesNetClearance

rte prouteStripesNetClearance float float_number

Description

Uses this clearance between stripes. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Net Clearance

Examples

envGetVal("rte" "prouteStripesNetClearance")

envSetVal("rte" "prouteStripesNetClearance" 'float 1.0)

prouteStripesNets

rte prouteStripesNets string "net_name"

Description

Declares power and ground nets for stripes power route.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Nets Ordering

Examples

envGetVal("rte" "prouteStripesNets")

envSetVal("rte" "prouteStripesNets" 'string "netB netC")

prouteStripesNetWidth

rte prouteStripesNetWidth float float_number

Description

Stripe width. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Net Width

Examples

envGetVal("rte" "prouteStripesNetWidth")

envSetVal("rte" "prouteStripesNetWidth" 'float 1.0)

prouteStripesOffsetFrom

rte prouteStripesOffsetFrom cyclic { "Design Boundary" | "Origin" | "Routing Area" }

Description

Stripes starting location. Values are the following:

'designBoundary
'origin
'routingArea

The default value is 'designBoundary.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Offset From

Examples

envGetVal("rte" "prouteStripesOffsetFrom")

envSetVal("rte" "prouteStripesOffsetFrom" 'cyclic "designBoundary")

envSetVal("rte" "prouteStripesOffsetFrom" 'cyclic "origin")

envSetVal("rte" "prouteStripesOffsetFrom" 'cyclic "routingArea")

prouteStripesPinClearance

rte prouteStripesPinClearance float float_number

Description

Uses this clearance between signal pins and power nets. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Pin Clearance

Examples

envGetVal("rte" "prouteStripesPinClearance")

envSetVal("rte" "prouteStripesPinClearance" 'float 1.0)

prouteStripesVertDir

rte prouteStripesVertDir boolean { t | nil }

Description

Creates vertical stripes. Values are t or nil. The default value is t.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Vertical Stripes

Examples

envGetVal("rte" "prouteStripesVertDir")

envSetVal("rte" "prouteStripesVertDir" 'boolean t)

envSetVal("rte" "prouteStripesVertDir" 'boolean nil)

prouteStripesVertLayers

rte prouteStripesVertLayers string "layer_names"

Description

Uses the specified vertical layers to route the vertical stripes. ?vertStripes must be set to t for this argument to take affect. Value is a list of vertical metal layers. Separate layers with spaces. If the string is empty, the router uses the first routable layer in the design.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Routing Layers

Examples

envGetVal("rte" "prouteStripesVertLayers")

envSetVal("rte" "prouteStripesVertLayers" 'string "Metal1 Metal2 Metal3 Metal4")

prouteStripesXStep

rte prouteStripesXStep float float_number

Description

When ?vertStripes is set to t, the router uses this value to separate the vertical stripes. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Step Increment

Examples

envGetVal("rte" "prouteStripesXStep")

envSetVal("rte" "prouteStripesXStep" 'float 1.0)

prouteStripesYStep

rte prouteStripesYStep float float_number

Description

When ?horiStripes is set to t, the router uses this value to separate the horizontal stripes. Value is a positive, nonzero floating number. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Stripes tab
Field	Step Increment

Examples

envGetVal("rte" "prouteStripesYStep")

envSetVal("rte" "prouteStripesYStep" 'float 1.0)

Vias Environment Variables

prouteViaInsertionColumns

rte prouteViaInsertionColumns int integer_number

Description

The number of cut columns. Value is an integer. The ?cutArrayRule argument must be set to 'arraySize, for this value to be in effect. The default value is 4.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Columns

Examples

envGetVal("rte" "prouteViaInsertionColumns")

envSetVal("rte" "prouteViaInsertionColumns" 'int 10)

prouteViaInsertionCutArray

rte prouteViaInsertionCutArray cyclic { "square" | "rectangular" | "arraySize" }

Description

The cut via configuration shape. Possible values are:

'square
'rectangular
'arraySize

If you specify 'arraySize, you must also enter values for the ?cutArrayRows and ?cutArrayColumns arguments.

The default value is Rectangular.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Cut Array

Examples

envGetVal("rte" "prouteViaInsertionCutArray")

envSetVal("rte" "prouteViaInsertionCutArray" 'cyclic "Square")

envSetVal("rte" "prouteViaInsertionCutArray" 'cyclic "Rectangular")

envSetVal("rte" "prouteViaInsertionCutArray" 'cyclic "Specified Array Size:")

prouteViaInsertionLayerRange

rte prouteViaInsertionLayerRange boolean { t | nil }

Description

Uses the layer range specified by the ?minLayer and ?maxLayer arguments. Values are t or nil. If nil, the router uses the top and bottom layers of the design as the min and max layers of the layer range. The default value is nil.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Layer Range

Examples

envGetVal("rte" "prouteViaInsertionLayerRange")

envSetVal("rte" "prouteViaInsertionLayerRange" 'boolean t)

envSetVal("rte" "prouteViaInsertionLayerRange" 'boolean nil)

prouteViaInsertionLayers

rte prouteViaInsertionLayers string "layer_names"

Description

Defines the layer to which the via should be inserted.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Via Location – Pin Location

Examples

envGetVal("rte" "prouteViaInsertionLayers")

envSetVal("rte" "prouteViaInsertionLayers" 'string "Metal11 Metal12 Metal13")

prouteViaInsertionLocation

rte prouteViaInsertionLocation cyclic { "Intersection of All Rings, Stripes, and Cell Rows" | "Selected Instances" }

"Gate" | "Source and Drain" | "All" }

Description

Lets you select the location at which inter-layer connections can take place and vias can be added. The possible values are:

Intersection of All Rings, Stripes, and Cell Rows - adds vias at the intersections of all rings, stripes, and cell rows.
Selected Instances - adds vias between stripes and the pins of selected block instances.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Via Location

Examples

envGetVal("rte" "prouteViaInsertionLocation")

envSetVal("rte" "prouteViaInsertionLocation" 'cyclic "Intersection of All Rings, Stripes, and Cell Rows")

envSetVal("rte" "prouteViaInsertionLocation" 'cyclic "Selected Instances")

prouteViaInsertionMaxLayer

rte prouteViaInsertionMaxLayer string "layer_names"

Description

Uses this layer as the highest metal layer for connection. The value is a layer string.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Maximum

Examples

envGetVal("rte" "prouteViaInsertionMaxLayer")

envSetVal("rte" "prouteViaInsertionMaxLayer" 'string "Metal1 Metal2 Metal3 Metal4")

prouteViaInsertionMinLayer

rte prouteViaInsertionMinLayer string "layer_names"

Description

Uses this layer as the lowest metal layer for connection. The value is a layer string.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Minimum

Examples

envGetVal("rte" "prouteViaInsertionMinLayer")

envSetVal("rte" "prouteViaInsertionMinLayer" 'string "Metal1 Metal2 Metal3 Metal4")

prouteViaInsertionNets

rte prouteViaInsertionNets string "net_name"

Description

Declares power and ground nets for via insertion.

GUI Equivalent

None

Examples

envGetVal("rte" "prouteViaInsertionNets")

envSetVal("rte" "prouteViaInsertionNets" 'string "netC netE")

prouteViaInsertionRows

rte prouteViaInsertionRows int integer_number

Description

The number of cut rows. Value is an integer. The ?cutArrayRule argument must be set to 'arraySize, for this value to be in effect. The default value is 4.

GUI Equivalent

Command	Route – Power Routing – Vias tab
Field	Rows

Examples

envGetVal("rte" "prouteViaInsertionRows")

envSetVal("rte" "prouteViaInsertionRows" 'int 10)

Tie Shield Environment Variables

prouteTieShieldCoaxTieFreq

rte prouteTieShieldCoaxTieFreq float float_number

Description

Specifies the maximum distance between ties that must be inserted to tie tandem shield wires and parallel shield wires for coaxial shielding. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Tie Shield tab
Field	Tie Frequency – Coax

Examples

envGetVal("rte" "prouteTieShieldCoaxTieFreq")

envSetVal("rte" "prouteTieShieldCoaxTieFreq" 'float 1.0)

prouteTieShieldShieldTieFreq

rte prouteTieShieldShieldTieFreq float float_number

Description

Specifies the maximum distance between ties that must be inserted to tie the new shield wires to their respective shield nets. The default value is 0.

GUI Equivalent

Command	Route – Power Routing – Tie Shield tab
Field	Tie Frequency – Shield

Examples

envGetVal("rte" "prouteTieShieldShieldTieFreq")

envSetVal("rte" "prouteTieShieldShieldTieFreq" 'float 1.0)

Pin to Trunk Environment Variables

The following sections describe the environment variables used in pin to trunk routing.

Pin to Trunk Section

autoComposeTrunk

p2t autoComposeTrunk boolean { t | nil }

Description

Converts shapes of selected nets into trunk objects. The trunk objects can then be used to perform Pin to Trunk routing. Shapes that are not used in Pin to Trunk routing are not converted into trunks. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Compose Trunks

Examples

envGetVal("p2t" "autoComposeTrunk")

envSetVal("p2t" "autoComposeTrunk" 'boolean t)

envSetVal("p2t" "autoComposeTrunk" 'boolean nil)

connectPinType

p2t connectPinType cyclic { "Gate" | "Source and Drain" | "All" }

Description

Lets you select the type of pin that should be used for Pin to Trunk routing. The possible values are:

Gate: connects the selected trunk to the gate pins.
Source and Drain: connects the trunk to the source and drain pins.
All: connects the trunk to all the existing pins.

Default is All.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Pin Type

Examples

envGetVal("p2t" "connectPinType")

envSetVal("p2t" "connectPinType" 'cyclic "Gate")

envSetVal("p2t" "connectPinType" 'cyclic "Source and Drain")

envSetVal("p2t" "connectPinType" 'cyclic "All")

highLightTwigType

p2t highLightTwigType cyclic { "Orthogonal" | "Non Orthogonal" | "All" }

Description

Controls twig highlighting in the Highlight Trunks command. The possible values are:

Orthogonal: highlights only orthogonal twigs.
Non Orthogonal: highlights only non-orthogonal twigs.
All: highlights both orthogonal and non-orthogonal twigs.

Default is Orthogonal.

GUI Equivalent

Command	Navigator – Net – Highlight Trunks
Field	None

Examples

envGetVal("p2t" "highLightTwigType")

envSetVal("p2t" "highLightTwigType" 'cyclic "Orthogonal")

envSetVal("p2t" "highLightTwigType" 'cyclic "Non Orthogonal")

envSetVal("p2t" "highLightTwigType" 'cyclic "All")

includeNonOrthogonalTwigs

p2t includeNonOrthogonalTwigs boolean { t | nil }

Description

When set to t, pins that are not orthogonally accessible to a trunk are selected by Pin to Trunk routing. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Include Non-orthogonal Twigs

Examples

envGetVal("p2t" "includeNonOrthogonalTwigs")

envSetVal("p2t" "includeNonOrthogonalTwigs" 'boolean t)

envSetVal("p2t" "includeNonOrthogonalTwigs" 'boolean nil)

orderTrunks

p2t orderTrunks boolean { t | nil }

Description

Optimizes the total routing length by re-ordering trunks not connected to a pin or another trunk. The trunks with more open twigs on the top are placed closer to the top end while the trunks with more open twigs on the bottom are placed closer to the bottom end. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Trunk Ordering

Examples

envGetVal("p2t" "orderTrunks")

envSetVal("p2t" "orderTrunks" 'boolean t)

envSetVal("p2t" "orderTrunks" 'boolean nil)

pinToTrunk

p2t pinToTrunk boolean { t | nil }

Description

Ensures that routing is completed between the pins orthogonal to the trunks. Default is t.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Pin to Trunk Routing

Examples

envGetVal("p2t" "pinToTrunk")

envSetVal("p2t" "pinToTrunk" 'boolean t)

envSetVal("p2t" "pinToTrunk" 'boolean nil)

routingAreaLLx

p2t routingAreaLLx float float_number

Description

Specifies the lower-left X-coordinate of the area in which the partially or fully enclosed trunks and pins will be considered for routing. Default is 0.0. Value must be a floating point number.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Specified Area (LLx)

Examples

envGetVal("p2t" "routingAreaLLx")

envSetVal("p2t" "routingAreaLLx" 'float 1.0)

routingAreaLLy

p2t routingAreaLLy float float_number

Description

Specifies the lower-left Y-coordinate of the area in which the partially or fully enclosed trunks and pins will be considered for routing. Default is 0.0. Value must be a floating point number.

GUI Equivalent

Command

Route – Design Setup – Pin to Trunk

Field

Specified Area (LLy)

Examples

envGetVal("p2t" "routingAreaLLy")

envSetVal("p2t" "routingAreaLLy" 'float 1.0)

routingAreaURx

p2t routingAreaURx float float_number

Description

Specifies the upper-right X-coordinate of the area in which the partially or fully enclosed trunks and pins will be considered for routing. Default is 0.0. Value must be a floating point number.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Specified Area (URx)

Examples

envGetVal("p2t" "routingAreaURx")

envSetVal("p2t" "routingAreaURx" 'float 1.0)

routingAreaURy

p2t routingAreaURy float float_number

Description

Specifies the upper-right Y-coordinate of the area in which the partially or fully enclosed trunks and pins will be considered for routing. Default is 0.0. Value must be a floating point number.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Specified Area (URy)

Examples

envGetVal("p2t" "routingAreaURy")

envSetVal("p2t" "routingAreaURy" 'float 1.0)

routingScope

p2t routingScope cyclic { "Current Editable Cellview" | "Current View Area" | "Specified Area" }

Description

Specifies the options to control the scope and region of Pin to Trunk routing. In addition, it allows you to specify the trunks that are to be used for Pin to Trunk routing and Pin to Trunk relation. This environment variable can take three values.

Current Editable Cellview: all trunks and pins in the editable cellview are considered for routing.
Current View Area: trunks and pins partially or fully enclosed in the current viewable area are considered for routing.
Specified Area: specifies the area in which the trunks and pins partially or fully enclosed are considered for routing.

Default is Current Editable Cellview.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Scope

Examples

envGetVal("p2t" "routingScope")

envSetVal("p2t" "routingScope" 'cyclic "Current Editable Cellview")

envSetVal("p2t" "routingScope" 'cyclic "Current View Area")

envSetVal("p2t" "routingScope" 'cyclic "Specified Area")

selectEastTrunk

p2t selectEastTrunk boolean { t | nil }

Description

Selects the trunks on the East side of a pin for routing. Default is t.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Search from Pin Side (East)

Examples

envGetVal("p2t" "selectEastTrunk")

envSetVal("p2t" "selectEastTrunk" 'boolean t)

envSetVal("p2t" "selectEastTrunk" 'boolean nil)

selectNorthTrunk

p2t selectNorthTrunk boolean { t | nil }

Description

Selects the trunks on the North side of a pin for routing. Default is t.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Search from Pin Side (North)

Examples

envGetVal("p2t" "selectNorthTrunk")

envSetVal("p2t" "selectNorthTrunk" 'boolean t)

envSetVal("p2t" "selectNorthTrunk" 'boolean nil)

selectOrthoPinsMode

p2t selectOrthoPinsMode cyclic { "Auto" | "Channel" | "Space" | "All" }

Description

Determines the mode that should be used to route the orthogonal pins to trunks. The possible values are:

Auto: automatically determines the mode of pin selection for orthogonal pins.
Channel: selects the pins orthogonally accessible to a trunk in the same channel.
Space: selects the pins orthogonally accessible to a trunk through one or more channels.
All: selects all the pins that are orthogonal to a trunk.

Default is Auto.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Pin-Trunk Relation (Mode)

Examples

envGetVal("p2t" "selectOrthoPinsMode")

envSetVal("p2t" "selectOrthoPinsMode" 'cyclic "Auto")

envSetVal("p2t" "selectOrthoPinsMode" 'cyclic "Channel")

envSetVal("p2t" "selectOrthoPinsMode" 'cyclic "Space")

envSetVal("p2t" "selectOrthoPinsMode" 'cyclic "All")

selectOverInstTrunk

p2t selectOverInstTrunk boolean { t | nil }

Description

Selects the trunks that are over an instance for routing. Default is t.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Search from Pin Side (Over)

Examples

envGetVal("p2t" "selectOverInstTrunk")

envSetVal("p2t" "selectOverInstTrunk" 'boolean t)

envSetVal("p2t" "selectOverInstTrunk" 'boolean nil)

selectSouthTrunk

p2t selectSouthTrunk boolean { t | nil }

Description

Selects the trunks on the South side of a pin for routing. Default is t.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Search from Pin Side (South)

Examples

envGetVal("p2t" "selectSouthTrunk")

envSetVal("p2t" "selectSouthTrunk" 'boolean t)

envSetVal("p2t" "selectSouthTrunk" 'boolean nil)

selectTrunkMode

p2t selectTrunkMode cyclic { "Closest or Selected" | "As Many As Possible" }

Description

Lets you to select the number and the trunks that are to be used by the Pin to Trunk routing engine. The two possible values are:

Closest or Selected: selects the closest trunk that is orthogonally accessible from the pin for routing. This means that a pin can be connected to only one trunk.
As Many As Possible: all the trunks that are orthogonally accessible from a pin are selected for routing. This means that a pin can be connected to more than one trunks.

Default is Closest or Selected.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Selection

Examples

envGetVal("p2t" "selectTrunkMode")

envSetVal("p2t" "selectTrunkMode" 'cyclic "Closest or Selected")

envSetVal("p2t" "selectTrunkMode" 'cyclic "As Many As Possible")

selectTrunkRangeValue

p2t selectTrunkRangeValue float float_number

Description

Specifies the value of the range from the edge of a channel in which trunks should be selected for routing. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	In Range

Examples

envGetVal("p2t" "selectTrunkRangeValue")

envSetVal("p2t" "selectTrunkRangeValue" 'float 1.0)

selectTrunkWithinRange

p2t selectTrunkWithinRange boolean { t | nil }

Description

Selects the trunks that are within a specified range from the edge of the channel where a pin can be accessed. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	In Range

Examples

envGetVal("p2t" "selectTrunkWithinRange")

envSetVal("p2t" "selectTrunkWithinRange" 'boolean t)

envSetVal("p2t" "selectTrunkWithinRange" 'boolean nil)

selectWestTrunk

p2t selectWestTrunk boolean { t | nil }

Description

Selects the trunks on the West side of a pin for routing. Default is t.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Search from Pin Side (West)

Examples

envGetVal("p2t" "selectWestTrunk")

envSetVal("p2t" "selectWestTrunk" 'boolean t)

envSetVal("p2t" "selectWestTrunk" 'boolean nil)

trunkExtending

p2t trunkExtending boolean { t | nil }

Description

Extends the selected trunk while routing. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Trunk Extending

Examples

envGetVal("p2t" "trunkExtending")

envSetVal("p2t" "trunkExtending" 'boolean t)

envSetVal("p2t" "trunkExtending" 'boolean nil)

trunkTapering

p2t trunkTapering boolean { t | nil }

Description

When set to t, enables trunk tapering. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Trunk Tapering

Examples

envGetVal("p2t" "trunkTapering")

envSetVal("p2t" "trunkTapering" 'boolean t)

envSetVal("p2t" "trunkTapering" 'boolean nil)

trunkToTrunk

p2t trunkToTrunk boolean { t | nil }

Description

Connects floating trunks and add vias at the intersection of the trunks. Default is t.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Trunk to Trunk Routing

Examples

envGetVal("p2t" "trunkToTrunk")

envSetVal("p2t" "trunkToTrunk" 'boolean t)

envSetVal("p2t" "trunkToTrunk" 'boolean nil)

trunkTrimming

p2t trunkTrimming boolean { t | nil }

Description

Trims both ends of a trunk while routing. Default is t.

Trunks with no twigs are not trimmed.

GUI Equivalent

Command	Route – Design Setup – Pin to Trunk
Field	Trunk Trimming

Examples

envGetVal("p2t" "trunkTrimming")

envSetVal("p2t" "trunkTrimming" 'boolean t)

envSetVal("p2t" "trunkTrimming" 'boolean nil)

Trunk Section

extendTrunkDirMode

p2t extendTrunkDirMode cyclic { "One" | "Both" }

Description

Specifies the direction in which you want to extend the trunk. This environment variable can take two values.

One: extends the trunk in a single direction.
Both: extends the trunk in both directions up to the last pin.

Default is Both.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Extend Trunk Direction

Examples

envGetVal("p2t" "extendTrunkDirMode")

envSetVal("p2t" "extendTrunkDirMode" 'cyclic "One")

envSetVal("p2t" "extendTrunkDirMode" 'cyclic "Both")

extendTrunkEndForOneDirMode

p2t extendTrunkEndForOneDirMode cyclic { "Left/Lower" | "Right/Upper" }

Description

When set, you can extend the trunk either in the Right/Upper or Left/Lower direction. By default, the trunk is extended in the Right/Upper direction.

Right/Upper: extends the right end of a horizontal trunk or upper end of a vertical trunk.
Left/Lower: extends the left end of a horizontal trunk or lower end of a vertical trunk.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	One Direction for Auto Route

Examples

envGetVal("p2t" "extendTrunkEndForOneDirMode")

envSetVal("p2t" "extendTrunkEndForOneDirMode" 'cyclic "Left/Lower")

envSetVal("p2t" "extendTrunkEndForOneDirMode" 'cyclic "Right/Upper")

highlightTrunkHaloType

p2t highlightTrunkHaloType cyclic { "none" | "plain" | "glow" | "fadeout"}

Description

Lets you specify the halo effect. The halo is added to provide a highlight around a trunk. The halo effects can be one of these:

none: does not add a halo effect around a trunk.
plain: adds a plain halo surrounding a trunk. This is the default value.
glow: adds a strong glowing halo surrounding a trunk.
fadeout: has the same display effect as glow.

GUI Equivalent

None

Examples

envGetVal("p2t" "highlightTrunkHaloType")

envSetVal("p2t" "highlightTrunkHaloType" 'cyclic "none")

envSetVal("p2t" "highlightTrunkHaloType" 'cyclic "plain")

envSetVal("p2t" "highlightTrunkHaloType" 'cyclic "glow")

envSetVal("p2t" "highlightTrunkHaloType" 'cyclic "fadeout")

highlightTrunkHaloWidth

p2t highlightTrunkHaloWidth cyclic { "thin" | "normal" | "thick" }

Description

Lets you specify the thickness of the halo that is added around a trunk. The default value is thin. This variable is effective only if highLightTrunkHaloType is set to a value other than none.

thin: adds a halo with a width thinner than normal.
normal: adds a halo with a width specified in the technology file.
thick: adds a halo with a width thicker than normal.

GUI Equivalent

None

Examples

envGetVal("p2t" "highlightTrunkHaloWidth")

envSetVal("p2t" "highlightTrunkHaloWidth" 'cyclic "thin")

envSetVal("p2t" "highlightTrunkHaloWidth" 'cyclic "normal")

envSetVal("p2t" "highlightTrunkHaloWidth" 'cyclic "thick")

trimTrunkMode

p2t trimTrunkMode cyclic { "Both Ends" | "Left/Lower End" | "Right/Upper End" }

Description

Specifies how to trim the trunks during Pin to Trunk routing. This environment variable can take three values.

Both Ends: trims both ends of the trunk.
Left/Lower End: trims the left or lower ends of the trunk.
Right/Upper End: trims the right or upper ends of the trunk.

Default is Both Ends.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Trim Trunk Mode

Examples

envGetVal("p2t" "trimTrunkMode")

envSetVal("p2t" "trimTrunkMode" 'cyclic "Both Ends")

envSetVal("p2t" "trimTrunkMode" 'cyclic "Left/Lower End")

envSetVal("p2t" "trimTrunkMode" 'cyclic "Right/Upper End")

trunkSetup

p2t trunkSetup boolean { t | nil }

Description

When set to t, enables you to setup layer and width to be used for trunk generation. This means that router can select the layer and width based on other criteria. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Creation – Use

Examples

envGetVal("p2t" "trunkSetup")

envSetVal("p2t" "trunkSetup" 'boolean t)

envSetVal("p2t" "trunkSetup" 'boolean nil)

trunkSetupHorTrunkLayer

p2t trunkSetupHorTrunkLayer string "layer_names"

Description

Specifies the horizontal trunk layer to create horizontal trunks. By default, no layer is set up.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Layer (Horizontal Trunk)

Examples

envGetVal("p2t" "trunkSetupHorTrunkLayer")

envSetVal("p2t" "trunkSetupHorTrunkLayer" 'string "Metal1 Metal2 Metal3 Poly")

trunkSetupHorTrunkWidth

p2t trunkSetupHorTrunkWidth float float_number

Description

Specifies the width of the horizontal trunk to be created. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Width (Horizontal Trunk)

Examples

envGetVal("p2t" "trunkSetupHorTrunkWidth")

envSetVal("p2t" "trunkSetupHorTrunkWidth" 'float 1.0)

trunkSetupVerTrunkLayer

p2t trunkSetupVerTrunkLayer string "layer_names"

Description

Specifies the vertical trunk layer to create vertical trunks. By default, no layer is set up.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Layer (Vertical Trunk)

Examples

envGetVal("p2t" "trunkSetupVerTrunkLayer")

envSetVal("p2t" "trunkSetupVerTrunkLayer" 'string "Metal1 Metal2 Metal3 Poly")

trunkSetupVerTrunkWidth

p2t trunkSetupVerTrunkWidth float float_number

Description

Specifies the width of the vertical trunk to be created. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Width (Vertical Trunk)

Examples

envGetVal("p2t" "trunkSetupVerTrunkWidth")

envSetVal("p2t" "trunkSetupVerTrunkWidth" 'float 1.0)

trunkTaperEdgeStyle

p2t trunkTaperEdgeStyle cyclic { "Orthogonal" | "Diagonal" | "Any Angle" }

Description

Specifies the edge style when the trunk width is tapered. This environment variable can take three values.

Orthogonal: the edge of the trunk connecting two steps is perpendicular to the steps.
Diagonal: edge of the trunk connecting two steps is slanted at 45 degrees from previous step to the next step.
Any Angle: the stair-step appearance reduces to form a smooth-slanting edge throughout the tapered trunks.

Default is Orthogonal.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Taper Edge Style

Examples

envGetVal("p2t" "trunkTaperEdgeStyle")

envSetVal("p2t" "trunkTaperEdgeStyle" 'cyclic "Orthogonal")

envSetVal("p2t" "trunkTaperEdgeStyle" 'cyclic "Diagonal")

envSetVal("p2t" "trunkTaperEdgeStyle" 'cyclic "Any Angle")

trunkTaperFirstIntervalLength

p2t trunkTaperFirstIntervalLength float float_number

Description

Specifies the length of first tapered trunk segment. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	First Trunk Segment Length

Examples

envGetVal("p2t" "trunkTaperFirstIntervalLength")

envSetVal("p2t" "trunkTaperFirstIntervalLength" 'float 1.0)

trunkTaperIntervalMode

p2t trunkTaperIntervalMode cyclic { "Auto" | "Custom" }

Description

Specifies where trunk tapering happens. This environment variable can take two values.

Auto: trunk tapering happens at each twig connection.
Custom: trunk tapering happens at the interval specified by you for the trunkTaperFirstIntervalLength and trunkTaperMiddleIntervalLength environment variables.

Default is Auto.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Interval Mode

Examples

envGetVal("p2t" "trunkTaperIntervalMode")

envSetVal("p2t" "trunkTaperIntervalMode" 'cyclic "Auto")

envSetVal("p2t" "trunkTaperIntervalMode" 'cyclic "Custom")

trunkTaperMiddleIntervalLength

p2t trunkTaperMiddleIntervalLength float float_number

Description

Specifies the length of all tapered trunk segments excluding the first and the last trunk segment. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Middle Trunk Segment Length

Examples

envGetVal("p2t" "trunkTaperMiddleIntervalLength")

envSetVal("p2t" "trunkTaperMiddleIntervalLength" 'float 1.0)

trunkTaperReductionMode

p2t trunkTaperReductionMode cyclic { "Auto" | "Specify Percentage" | "Specify Value" }

Description

Enables you to specify the extent of width reduction on each side of a tapered trunk segment. This environment variable can take three values.

Auto: reduces the width by a value equal to the width of the previous outgoing twig segment.
Specify Percentage: reduces the width of the tapered trunk segment by the percentage specified by the trunkTaperReductionPercent environment variable.
Specify Value: reduces the width of the tapered trunk segment by the value specified by the trunkTaperReductionValue environment variable.

Default is Auto.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Trunk Width Reduction Per Side

Examples

envGetVal("p2t" "trunkTaperReductionMode")

envSetVal("p2t" "trunkTaperReductionMode" 'cyclic "Auto")

envSetVal("p2t" "trunkTaperReductionMode" 'cyclic "Specify Percentage")

envSetVal("p2t" "trunkTaperReductionMode" 'cyclic "Specify Value")

trunkTaperReductionPercent

p2t trunkTaperReductionPercent float float_number

Description

Specifies the percentage by which the width of the tapered trunk segment is to be reduced. The reduction per tapered side is a percentage of the original trunk width. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Trunk Width Reduction Per Side (Specify Percentage)

Examples

envGetVal("p2t" "trunkTaperReductionPercent")

envSetVal("p2t" "trunkTaperReductionPercent" 'float 1.0)

trunkTaperReductionValue

p2t trunkTaperReductionValue float float_number

Description

Specifies a value by which the width of the tapered trunk segment is to be reduced. The reduction per tapered side is according to the specified value. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Trunk Width Reduction Per Side (Specify Value)

Examples

envGetVal("p2t" "trunkTaperReductionValue")

envSetVal("p2t" "trunkTaperReductionValue" 'float 1.0)

trunkTaperSideMode

p2t trunkTaperSideMode cyclic { "Both Sides" | "Left/Lower Side" | "Right/Upper Side" }

Description

Lets you reduce the width of a trunk from a particular side or from both sides. By default, the trunk is tapered from both sides. This environment variable can take three values.

Both Sides: tapers both sides of the trunk,
Left/Lower Side: tapers the left or lower side of the trunk.
Right/Upper Side: tapers the right or upper side of the trunk.

GUI Equivalent

Command	Route – Design Setup – Trunk
Field	Tapering Side

Examples

envGetVal("p2t" "trunkTaperSideMode")

envSetVal("p2t" "trunkTaperSideMode" 'cyclic "Both Sides")

envSetVal("p2t" "trunkTaperSideMode" 'cyclic "Left/Lower Side")

envSetVal("p2t" "trunkTaperSideMode" 'cyclic "Right/Upper Side")

Twig Section

connectMultiPinShapes

p2t connectMultiPinShapes boolean { t | nil }

Description

When set to t, the router connects to all the simple shapes and sub-shapes of all the pins of a terminal. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Connect All Pin Shapes to Trunks

Examples

envGetVal("p2t" "connectMultiPinShapes")

envSetVal("p2t" "connectMultiPinShapes" 'boolean t)

envSetVal("p2t" "connectMultiPinShapes" 'boolean nil)

gateTwigLayerMode

p2t gateTwigLayerMode cyclic { "Use Layout Context" | "Prefer Routing Direction" | "Prefer Pin Layer" | "Specified" }

Description

Controls selecting a layer for generating gate twigs. This environment variable can take four values.

Use Layout Context: selects a layer to insert a gate twig from a set of valid routing layers.
Prefer Routing Direction: considers the preferred routing direction of the layer while creating a twig.
Prefer Pin Layer: selects a layer matching the layer of a pin shape to which the twig is to be connected.
Specified: specifies the twig layers to be used by the router for creating horizontal and vertical twigs.

Default is Use Layout Context.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Gate Twig Layer

Examples

envGetVal("p2t" "gateTwigLayerMode")

envSetVal("p2t" "gateTwigLayerMode" 'cyclic "Use Layout Context")

envSetVal("p2t" "gateTwigLayerMode" 'cyclic "Prefer Routing Direction")

envSetVal("p2t" "gateTwigLayerMode" 'cyclic "Prefer Pin Layer")

envSetVal("p2t" "gateTwigLayerMode" 'cyclic "Specified")

gateTwigWidthMode

p2t gateTwigWidthMode cyclic { "Use Net Constraints" | "Use Pin Width" | "Specified" }

Description

Controls the width that the router uses to route gate twigs. This environment variable can take three values.

Use Net Constraints: determines the twig width using the width constraints specified for the net.
Use Pin Width: considers the width of the gate twigs equal to the width of the pin.
Specified: specifies the value for the twig width.

Default is Use Pin Width.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Gate Twig Width

Examples

envGetVal("p2t" "gateTwigWidthMode")

envSetVal("p2t" "gateTwigWidthMode" 'cyclic "Use Net Constraints")

envSetVal("p2t" "gateTwigWidthMode" 'cyclic "Use Pin Width")

envSetVal("p2t" "gateTwigWidthMode" 'cyclic "Specified")

horGateTwigLayer

p2t horGateTwigLayer string "layer_names"

Description

Specifies the layer for creating horizontal gate twigs. By default, no layer is set up. It allows the router to select the most appropriate layer.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Horizontal Twig Layer

Examples

envGetVal("p2t" "horGateTwigLayer")

envSetVal("p2t" "horGateTwigLayer" 'string "Metal1 Metal2 Metal3 Poly")

horGateTwigWidth

p2t horGateTwigWidth float float_number

Description

Specifies the width value for creating horizontal gate twigs. Default is 0.0. This means that router determines the width based on other criteria.

Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Horizontal Twig Width

Examples

envGetVal("p2t" "horGateTwigWidth")

envSetVal("p2t" "horGateTwigWidth" 'float 1.0)

horNonGateTwigLayer

p2t horNonGateTwigLayer string "layer_names"

Description

Specifies the layer for creating horizontal non-gate twigs. By default, no layer is set up. It allows the router to select the most appropriate layer.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Horizontal Twig Layer

Examples

envGetVal("p2t" "horNonGateTwigLayer")

envSetVal("p2t" "horNonGateTwigLayer" 'string "Metal1 Metal2 Metal3 Poly")

horNonGateTwigWidth

p2t horNonGateTwigWidth float float_number

Description

Specifies the width value for creating horizontal non-gate twigs. Default is 0.0. This means that router determines the width based on other criteria.

Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Horizontal Twig Width

Examples

envGetVal("p2t" "horNonGateTwigWidth")

envSetVal("p2t" "horNonGateTwigWidth" 'float 1.0)

mergeTapsInCloseProximity

p2t mergeTapsInCloseProximity boolean { t | nil }

Description

Merges the twigs that are close to each other. This means that the router merges adjacent parallel twigs if the distance between them is less than the minimum spacing. When set to nil, each twig is independently connected to the trunk. Default is t.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Merge Taps in Close Proximity

Examples

envGetVal("p2t" "mergeTapsInCloseProximity")

envSetVal("p2t" "mergeTapsInCloseProximity" 'boolean t)

envSetVal("p2t" "mergeTapsInCloseProximity" 'boolean nil)

nonGateTwigLayerMode

p2t nonGateTwigLayerMode cyclic { "Use Layout Context" | "Prefer Routing Direction" | "Prefer Pin Layer" | "Specified" }

Description

Controls selecting a layer for generating non-gate twigs. This environment variable can take four values.

Use Layout Context: selects a layer to insert a non-gate twig from a set of valid routing layers.
Prefer Routing Direction: considers the preferred routing direction of the layer while creating a non-gate twig.
Prefer Pin Layer: selects a layer matching the layer of a pin shape to which the non-gate twig is to be connected.
Specified: specifies the twig layers to be used by the router for creating horizontal and vertical non-gate twigs.

Default is Use Layout Context.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Non-Gate Twig Layer

Examples

envGetVal("p2t" "nonGateTwigLayerMode")

envSetVal("p2t" "nonGateTwigLayerMode" 'cyclic "Use Layout Context")

envSetVal("p2t" "nonGateTwigLayerMode" 'cyclic "Prefer Routing Direction")

envSetVal("p2t" "nonGateTwigLayerMode" 'cyclic "Prefer Pin Layer")

envSetVal("p2t" "nonGateTwigLayerMode" 'cyclic "Specified")

nonGateTwigWidthMode

p2t nonGateTwigWidthMode cyclic { "Use Net Constraints" | "Use Pin Width" | "Specified" }

Description

Controls the width that the router uses to route non-gate twigs. This environment variable can take three values.

Use Net Constraints: determines the non-gate twig width using the width constraints specified for the net.
Use Pin Width: considers the width of the gate twigs equal to the width of the pin.
Specified: specifies the value for the twig width.

Default is Use Pin Width.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Non-Gate Twig Width

Examples

envGetVal("p2t" "nonGateTwigWidthMode")

envSetVal("p2t" "nonGateTwigWidthMode" 'cyclic "Use Net Constraints")

envSetVal("p2t" "nonGateTwigWidthMode" 'cyclic "Use Pin Width")

envSetVal("p2t" "nonGateTwigWidthMode" 'cyclic "Specified")

pinStrapLayer

p2t pinStrapLayer string "layer_names"

Description

Specifies the layer on which strapping should take place during Pin to Trunk routing. By default, no layer is set up. The router picks the layer closest to the pin and whose preferred routing direction matches the direction of the strap.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Strap Layer

Examples

envGetVal("p2t" "pinStrapLayer")

envSetVal("p2t" "pinStrapLayer" 'string "Metal1 Metal2 Metal3 Poly")

pinStrapLocationPreference

p2t pinStrapLocationPreference cyclic { "Closer To Pin" | "Closer To Trunk" }

Description

Enables you to select the location where the strap should be created. This environment variable can take two values.

Closer to Pin: creates the strap closer to the pin than the trunk.
Closer to Trunk: creates the strap closer to the trunk than the pin.

Default is Closer To Pin.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Strap Location

Examples

envGetVal("p2t" "pinStrapLocationPreference")

envSetVal("p2t" "pinStrapLocationPreference" 'cyclic "Closer To Pin")

envSetVal("p2t" "pinStrapLocationPreference" 'cyclic "Closer To Trunk")

pinStrapMaxPinCount

p2t pinStrapMaxPinCount int integer_number

Description

Specifies the maximum number of pins that can be strapped during Pin to Trunk routing. Default is 2. Value should be a non-negative integer.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Maximum Pin Count

Examples

envGetVal("p2t" "pinStrapMaxPinCount")

envSetVal("p2t" "pinStrapMaxPinCount" 'int 100)

pinStrapMaxPinDistance

p2t pinStrapMaxPinDistance float float_number

Description

Specifies the maximum edge-to-edge distance between two adjacent pins to be strapped. Default is 10 micron. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Maximum Pin Distance

Examples

envGetVal("p2t" "pinStrapMaxPinDistance")

envSetVal("p2t" "pinStrapMaxPinDistance" 'float 1.0)

pinStrapping

p2t pinStrapping boolean { t | nil }

Description

When set to t, straps the pins on different instances. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Strap Pins on Different Instances

Examples

envGetVal("p2t" "pinStrapping")

envSetVal("p2t" "pinStrapping" 'boolean t)

envSetVal("p2t" "pinStrapping" 'boolean nil)

pinStrapPinLayer

p2t pinStrapPinLayer string "layer_names"

Description

Specifies the pin layer used to select pins to be strapped together. By default, no layer is set up.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Pin Layer

Examples

envGetVal("p2t" "pinStrapPinLayer")

envSetVal("p2t" "pinStrapPinLayer" 'string "Metal1 Metal2 Metal3 Poly")

pinStrapWidth

p2t pinStrapWidth float float_number

Description

Specifies the width of the strap that is created during Pin to Trunk routing. Default is 0.0, which implies that strap width will match the minimum width of the strap layer. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Strap Width

Examples

envGetVal("p2t" "pinStrapWidth")

envSetVal("p2t" "pinStrapWidth" 'float 1.0)

strapGateSourceDrainPins

p2t strapGateSourceDrainPins boolean { t | nil }

Description

When set to t, straps the gate, source, and drain pins of the same instance and same net together before making a connection to the trunk. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Strap Pins on Same Device-Level Instance

Examples

envGetVal("p2t" "strapGateSourceDrainPins")

envSetVal("p2t" "strapGateSourceDrainPins" 'boolean t)

envSetVal("p2t" "strapGateSourceDrainPins" 'boolean nil)

tapCoverPinPercent

p2t tapCoverPinPercent int integer_number

Description

Specifies the percentage of a pin shape to be covered by a twig when a trunk is not over a device. Default is 100. Value must be a positive integer.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Trunk Offset from Device (Tap) Topmost Vias

Examples

envGetVal("p2t" "tapCoverPinPercent")

envSetVal("p2t" "tapCoverPinPercent" 'int 100)

tapLowerViasCoverPinPercent

p2t tapLowerViasCoverPinPercent int integer_number

Description

Specifies the percentage of a pin shape to be covered by the other layers of the tapping vias when the trunk is on a layer that is at least two layers above or below the pin layer. Default is 100. Value must be a positive integer.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Other Vias

Examples

envGetVal("p2t" "tapLowerViasCoverPinPercent")

envSetVal("p2t" "tapLowerViasCoverPinPercent" 'int 100)

trunkOverDeviceViaCoverMode

p2t trunkOverDeviceViaCoverMode cyclic { "Match Trunk" | "Match Pin" | "Match Pin Except Top" }

Description

Controls the percentage of source and drain pin coverage with via stacks, when the trunk is entirely over the device. This environment variable can take three values.

Match Trunk: covers the width of the trunk.
Match Pin: covers the width of the pin.
Match Pin Except Top: covers the width of the trunk on the top via layer and covers the width of the pin on the lower via layers.

Default is Match Trunk.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Trunk Over Device Via (Mode)

Examples

envGetVal("p2t" "trunkOverDeviceViaCoverMode")

envSetVal("p2t" "trunkOverDeviceViaCoverMode" 'cyclic "Match Trunk")

envSetVal("p2t" "trunkOverDeviceViaCoverMode" 'cyclic "Match Pin")

envSetVal("p2t" "trunkOverDeviceViaCoverMode" 'cyclic "Match Pin Except Top")

trunkOverDeviceViaCoverPercent

p2t trunkOverDeviceViaCoverPercent int integer_number

Description

Specifies the percentage of a trunk or a pin to be covered with vias when the trunk is entirely over devices. Default is 100. Value should be a non-negative integer.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Percentage Pin Covered by Vias

Examples

envGetVal("p2t" "trunkOverDeviceViaCoverPercent")

envSetVal("p2t" "trunkOverDeviceViaCoverPercent" 'int 100)

twigLengthMatching

p2t twigLengthMatching boolean { t | nil }

Description

When set to t, the shorter twigs are extended so that all twigs on the selected nets have the same length. The twig length is matched to the length of the largest twig irrespective of how far the trunk is placed from the pin. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Match Twig Length on Selected Nets

Examples

envGetVal("p2t" "twigLengthMatching")

envSetVal("p2t" "twigLengthMatching" 'boolean t)

envSetVal("p2t" "twigLengthMatching" 'boolean nil)

verGateTwigLayer

p2t verGateTwigLayer string "layer_names"

Description

Specifies the layer for creating vertical gate twigs. By default, no layer is set up.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Vertical Twig Layer

Examples

envGetVal("p2t" "verGateTwigLayer")

envSetVal("p2t" "verGateTwigLayer" 'string "Metal1 Metal2 Metal3 Poly")

verGateTwigWidth

p2t verGateTwigWidth float float_number

Description

Specifies the width value for creating vertical gate twigs. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Vertical Twig Width

Examples

envGetVal("p2t" "verGateTwigWidth")

envSetVal("p2t" "verGateTwigWidth" 'float 1.0)

verNonGateTwigLayer

p2t verNonGateTwigLayer string "layer_names"

Description

Specifies the layer for creating vertical non-gate twigs. By default, no layer is set up.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Vertical Twig Layer

Examples

envGetVal("p2t" "verNonGateTwigLayer")

envSetVal("p2t" "verNonGateTwigLayer" 'string "Metal1 Metal2 Metal3 Poly")

verNonGateTwigWidth

p2t verNonGateTwigWidth float float_number

Description

Specifies the width value for creating vertical non-gate twigs. Default is 0.0. Value must be a positive floating point number.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Vertical Twig Width

Examples

envGetVal("p2t" "verNonGateTwigWidth")

envSetVal("p2t" "verNonGateTwigWidth" 'float 1.0)

viaCoverPinWidth

p2t viaCoverPinWidth boolean { t | nil }

Description

When set to t, covers the entire width of a pin with vias. Otherwise, covers pins using the width of the routed wire. Default is nil.

GUI Equivalent

Command	Route – Design Setup – Twig
Field	Via Covers Width of Pin

Examples

envGetVal("p2t" "viaCoverPinWidth")

envSetVal("p2t" "viaCoverPinWidth" 'boolean t)

envSetVal("p2t" "viaCoverPinWidth" 'boolean nil)

Trunk to Trunk Section

connectTrunkType

p2t connectTrunkType cyclic { "All Trunks" | "Crossed Trunks Only" }

Description

Specifies the connection for the types of trunks. This environment variable can take two values.

All Trunks: connects all crossed and floating trunks.
Crossed Trunks Only: connects only crossed trunks.

Default is All Trunks.

GUI Equivalent

Command	Route – Design Setup – Trunk to Trunk Connection
Field	Mode

Examples

envGetVal("p2t" "connectTrunkType")

envSetVal("p2t" "connectTrunkType" 'cyclic "All Trunks")

envSetVal("p2t" "connectTrunkType" 'cyclic "Crossed Trunks Only")

Virtuoso Space-based Router User GuideProduct Version IC23.1, August 2023

B

Environment Variables

Automatic Router Environment Variables

ia

blockTreatmentTreatAs

Description

GUI Equivalent

Examples

Related Topics

busBitTableRows

Description

GUI Equivalent

Examples

Related Topics

forceGlobalPlanning

Description

GUI Equivalent

Examples

Related Topics

globalAllNets

Description

GUI Equivalent

Examples

Related Topics

globalIncludePreroutes

Description

GUI Equivalent

Examples

Related Topics

lockPreRoutes

Description

GUI Equivalent

Examples

Related Topics

presetDefaultFile

Description

GUI Equivalent

Examples

Related Topics

presetLoadMode

Description

GUI Equivalent

Examples

Related Topics

presetResetMode

Description

GUI Equivalent

Examples

Related Topics

vsrFlow

Description

GUI Equivalent

Examples

Related Topics

widthSpaceTableRows

Description

GUI Equivalent

Examples

Related Topics

layout

adjustViatoWireEdge

Description

GUI Equivalent

Examples

Related Topics

checkRoutabilityCreateExcludeSet

Description

GUI Equivalent

Examples

Related Topics

checkRoutabilityMarkersLimit

Description

GUI Equivalent

Examples

Related Topics

checkRoutabilityMissingCoverObstruction

Description

GUI Equivalent

Examples

Virtuoso Space-based Router User Guide
Product Version IC23.1, August 2023