Allegro Front to Back User Guide

Allegro Front-to-Back User Guide Designing Layout October 2019 50 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. PCB Editor is an intuitive, easy-to-use, constraint-driven environment for creating and editing simple to complex PCBs. Its extensive feature set addresses a wide range of design and manufacturability challenges. Cadence's Allegro PCB Editor helps you perform the major board tasks of design, including: ■ Floor planning and Placement ■ Routing ■ Constraint Management ■ Placement Replication ■ Multi-Line Routing Physical Layout using OrCAD PCB Editor After packaging the logical schematic, the next step is to design the physical layout. Native design logic refers to design data extracted from the logic design tools that create schematics or logic design files, that interface with the layout editor. Following are the tasks that are required for designing the physical layout phase of PCB Flows: ■ Creating a Board Outline ■ Creating Symbols and Padstacks ■ Importing Logic ■ Defining Layers ■ Defining Constraints ■ Placement ■ Routing ■ Design Synchronization

• 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