Placement Modes for Generating Selected Components from Source

Use the Generate Selected From Source command to incrementally generate schematic instances and pins in the layout view. You can select the components to be generated either before or after you launch the command. You can select the components to be generated either from the schematic canvas or from the ungenerated instances list in the Navigator assistant.

The instances generated using the Generate Selected From Source command are automatically bound to their schematic counterparts and have the correct connectivity.

You can generate the components in the layout view using one of the following generation modes:

• As In Schematic – Use this mode to generate instances and pins either as a group or as individual components.
  By default, the selected instances are placed as in the schematic. But, you can select a combination of instances and pins and change the alignment, spacing, and orientation of the selected components before you place them in the layout. You can also enable automatic folding for instances.
  See Generating Components As In Schematic.
• Array – Use this mode to generate an array of ungrouped instances, a modgen, a mosaic, or a group array.
  Array placement mode cannot be used to place pins.
  See Generating an Array.
• Individually – Use this mode to generate instances and pins one at a time.
  When generating components individually, you can change the values of any properties and attributes associated with each object before you generate it. You can also enable automatic chaining and folding for instances.
  See Generating Individual Instances and Generating Individual Pins.

Generate Selected From Source command:

• Honors any constraints entered using the Virtuoso Constraint Manager. It also applies all callbacks before any instance is created. The complete list of parameters found on the connectivity source instance (including the adjusted folding, sfactor Property, or lxCombination Property parameters) are used to call the CDF; the resulting list is passed to the layout instance.
• When it is active, clicking on a component in either the design canvas or the Navigator assistant only highlights the object, it does not select it. Consequently, any information displayed in the Property Editor assistant is not updated.
• If a layout instance master terminal has an inherited net expression (an implicit inherited connection) for a global layout net, Generate Selected From Source creates a physical-only layout terminal with no schematic equivalent. This terminal has the physOnly property set to t so that it can be correctly ignored by Layout XL functions such as Update Components And Nets and Check Against Source and by the digital applications further on in the design flow.

Related Topics

Viewing Ungenerated Instances In Navigator

Generating Components As In Schematic

Generating an Array

Generating Individual Instances

Generating Individual Pins

Listing Unplaced Components after Layout Generation

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