Allegro Front to Back User Guide

Allegro Front-to-Back User Guide Capturing Logical Design October 2019 23 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. System Capture Before you start designing schematic, you create a new System Capture project. Projects created in System Capture consist of the same files as in DE-HDL. When you create a project, a default schematic page is added and displayed. You can add or delete one or multiple sheets simultaneously. When you click a schematic sheet, the sheet opens in the canvas and you can view its contents. You can also preview the contents of a schematic page in a thumbnail without opening the page. 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 Design Entry HDL is a legacy tool that provides same functionalities as System Capture. It organizes schematic information into pages. It captures and displays only one page of schematic information at a time, and is a by-reference editor because it references all parts in a schematic from various libraries that reside at the reference or local area. When you create a project using Design Entry HDL or System Capture, a project file called .cpm is created in the project directory. To create a project, you can also use Project Manager. This project consists of the following: ■ Reference libraries ■ Local libraries (design libraries) ■ cds.lib file ■ Project file (.cpm) Reference Libraries Allegro System Capture and DE-HDL references all parts in a schematic from various libraries that are located in the reference or local area. These libraries are called reference libraries. For example, the standard library is a reference library.

• 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