physOnly Property

Description

The physOnly or physicalOnly attribute is applicable for Layout XL designs that need to be interoperable with Cadence Innovus Digital Implementation System for mixed-signal design implementation.

If the physOnly attribute is set on a layout instance:

• The Layout XL binder ignores it and leaves the instance unbound. Likewise, the instance is also ignored during a Check Against Source run.
  • In Layout XL, the physOnly attribute is automatically set on filler cells during floorplanning.
  • The Innovus Digital Implementation System interprets it as an instance that needs to be implemented only in the OA block domain, not in the OA module domain.
  • The OA block domain includes the physical connectivity and the design geometry, whereas the OA module domain includes the logical connectivity and the design hierarchy. Therefore, if a layout instance has the physOnly attribute set to true, the instance will only be implemented in the block domain using Cadence Innovus Digital Implementation System.

After you set the physOnly attribute on an instance, you cannot remove the attribute. You will need to delete the instance and recreate it without the attribute set.

You can also set the physOnly attribute on instance terminals to mark them as block domain-only, like inherited connections.

Create Instance Form
Physical Only	True

Related Topics

ignore Property

lvsIgnore Property

Setting Layout XL Properties

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