maxSingleCouplingPercent

Specifies the maximum allowed amount of coupling capacitance from all neighbor nets that only couple to one of the nets in a pair as a percentage value.

maxSingleCouplingPercent Quick Reference

Constraint Type	Simple
Value Types	`IntValue`
Database Types	Design, Technology
Scope	design, foundry
Category	Mixed Signal Routing

Value Type

maxSingleCouplingPercent constraints have an IntValue that specifies the maximum allowed amount of coupling capacitance from all neighbor nets that only couple to one of the nets in a pair as a percentage value.

Examples

This example sets the maximum amount of coupling from all neighbor nets to a single net to 15%.

set_constraint -constraint maxSingleCouplingPercent -IntValue 15

minCoupling

Sets the minimum coupling capacitance (in Farads) required between the nets.

minCoupling Quick Reference

Constraint Type	Simple
Value Types	`FltValue`
Database Types	Design, Technology
Scope	design, foundry
Category	Mixed Signal Routing

Value Type

minCoupling constraints have a FltValue representing the minimum required coupling capacitance in Farads.

Examples

This example sets the minimum amount of coupling between nets to 0.5 Farad.

set_constraint -constraint minCoupling -FltValue 0.5

minCouplingPercent

Sets the minimum coupling capacitance as a percentage required between the nets of a net pair or group.

minCouplingPercent Quick Reference

Constraint Type	Simple
Value Types	`IntValue`
Database Types	Design, Technology
Scope	design, foundry
Category	Mixed Signal Routing

Value Type

minCouplingPercent constraints have an IntValue representing the minimum required coupling capacitance as a percentage.

Examples

This example sets the minimum amount of coupling between nets to 10%.

set_constraint -constraint minCouplingPercent -IntValue 10

msConnectSupplyDistance

Specifies the maximum distance between ties that must be inserted to tie the new shield wires to their respective shield nets. If this constraint is not specified, only minimal connections are inserted to tie shield wires to their respective nets.

For interoperability with Cadence Innovus™ flows, use this constraint to specify the shield tie distance.

msConnectSupplyDistance Quick Reference

Constraint Type	Simple
Value Types	`Value`
Database Types	Design
Scope	design, foundry
Category	Mixed Signal Routing

Value Type

Value

Specifies the maximum distance in user units between shield ties.

Examples

This example sets the shield tie frequency to 2.0 user units.

set_constraint -constraint msConnectSupplyDistance -Value 2.0

Virtuoso Space-based Router Constraint Reference
Product Version IC23.1, June 2023