Allegro Front to Back User Guide

Allegro Front-to-Back User Guide Creating and Managing Libraries October 2019 20 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. OrCAD Libraries Capture provides more than 80 libraries; in addition, you can create custom libraries. If you edit a library provided by Capture, you should give it a custom name so that you do not copy over your changes when you receive updated libraries. You can, for example, create a library to hold all your programmable logic devices, or hold schematic folders that you use often. There is no need to create a library for a particular project, because the design cache holds all the parts and symbols used in the project. Since an OrCAD library is a file, you can work with it in the Windows File Manager as well as in Capture. It is recommended that, rather than editing parts in libraries provided by OrCAD, you copy the part and make the changes in a custom library. Creating a Library In Capture, you can add as many libraries as required by specifying a name and storage location for each library. Each library is available to each project. The library size is limited only by the amount of space on your system's hard disk; however larger libraries take longer to load. When you create a new library, project manager adds an empty library to the project. To populate the library, you can create your own parts, or you can move or copy parts from another library. Saving a Library The changes you make to a part are temporary until you save the part or the library. When you save a library, you save all the parts and symbols residing in the library. If there are several parts or symbols opened in the part editor, the changes you make to any of them are saved. For more information about creating and managing libraries in OrCAD, refer to OrCAD Capture User Guide.

• Cover
• c contents - Contents
• Preface
• About the Front-to-Back Flow
• How This Book is Organized
• Creating and Managing Libraries
• Allegro Front-end Tools Libraries
• Library Structure
• Creating and Managing Libraries
• OrCAD Libraries
• Capturing Logical Design
• Creating Project Using Allegro Tools
• System Capture
• You can also perform other page manipulation operations, such as creating a new page or deleting an existing page from the Project viewer. You can drag and move the pages up and down to change their order in the Project viewer.
• Allegro Design Entry HDL
• Creating Project Using OrCAD Capture
• Creating a Schematic
• Designing Schematic Using System Capture
• Creating Schematic Using OrCAD Capture
• Capturing Logical Designs using DE-HDL
• Capturing Logical Design Constraints
• Why Constraint Manager?
• Using Constraint Manager with Design Capture Tools
• All the constraints are stored in the Constraint Manager Database (CMDB) and saved in the dictionary and constraints file designname.dcf.
• Constraints in System Capture
• Capturing Constraints in Design Entry HDL
• Capturing Constraints in OrCAD Capture
• Creating Variants of Your Design
• Managing Variants in System Capture
• Creating Variants using Variant Editor
• Getting Logical Design Ready for Physical Layout
• Preparing a System Capture Design for Physical Layout
• Preparing a DE-HDL Design for Physical Layout
• Exporting a DE-HDL Design
• Forward Mode
• Preparing an OrCAD Capture Design for Physical Layout
• Exporting an OrCAD Capture
• Annotating the Design
• Packaging Your Design (Advanced)
• Generating a Bill of Materials
• Updating the Schematic With the Changes in the Board
• Passing Properties from the Layout to Schematic
• Designing Layout
• Physical Layout using OrCAD PCB Editor
• Creating a Board Outline
• Creating Symbols and Padstacks
• Importing Logic
• Defining Layers
• Defining Constraints
• Placement
• Routing
• Design Synchronization
• Physical Layout using OrCAD Capture
• Preparing the Schematic for Layout
• Property Flow from Capture to PCB Editor
• Generating Initial Board File
• Backannotation from PCB Editor
• Running Design Rules Check - Physical Rules
• Capturing Physical Constraints
• Using Constraint Manager with PCB Editor
• Synchronizing Schematics and Boards
• Need for Synchronization
• Design Synchronization Tasks
• Feedback Mode