Virtuoso Schematic Composer User Guide

Getting Started

Click None to deselect all cellviews and quit without saving your changes.

3.Click OK.

If you click Cancel on the Save Changes form, you cancel both the save and the quit operations, and the software continues to run.

For information about saving your environment, saving your session, or viewing your log file, refer to Design Framework II User Guide.

Working with Libraries

This section describes the following topics:

■Database Structure on page 47

■Design Libraries on page 47

■Reference Libraries on page 48

■Library Browser on page 48

Virtuoso Schematic Composer User Guide

Getting Started

Database Structure

Design Entry database

The database holds all design data as follows:

■Libraries hold your design hierarchy. A library has associated files, such as the technology file, catalog file, foreign database files, and an audit trail. The catalog file keeps track of the logical names of design objects and their physical location.

■Cells are components of a design. If a schematic spans more than one page, as the IO reg does, the page shows up as a cell denoted by the sheet number. The first cell name without the sheet number is the schematic index.

■Cellviews are specific representations of a cell.

■Views contain connectivity data that describe the logical views of a design.

The Cadence Application Infrastructure User Guide provides additional information about the library structure.

Design Libraries

A design library is a storage area where you create a new design. Design libraries have readwrite access so that you can edit and save a design.

You need to create a new library with read and write access so that you can edit and save a design in it.