Virtuoso XL Layout Editor User Guide

3

Preparing Your Connectivity Source for the Virtuoso XL Layout Editor

This chapter explains how to prepare the connectivity source for your design (schematic or netlist) for generating, placing, and routing a layout with the Virtuoso® XL layout editor (Virtuoso XL). This chapter covers these topics:

Placing Design Elements on page 37

Using Design Variables on page 38

Using One-to-Many Mapping on page 39

Using Many-to-Many or Many-to-One Mapping on page 45

Using Virtuoso XL Properties on page 48

Using the lxUseCell Property to Specify Layout Devices to Use on page 49

Using the lvsIgnore Property to Exclude Schematic Symbols on page 59

Using the lxlgnoredParams Property to Exclude Device Properties on page 63

Using the lxViewList and lxStopList Properties to Prepare Hierarchical Designs on page 65

Using the lxCombination Property to Build Complex Devices on page 68

Using the lxNetNamePrefi Property to Add Prefixes to Nets on page 70

Placing Design Elements

You can use any schematic to generate a layout with Virtuoso XL. However, the process is easier if you follow these guidelines when you create your schematic:

Place symbols of devices and pins in the schematic approximately where you want them to be in the layout. The Virtuoso XL Edit – Place As In Schematic command lets you