Allegro Front to Back User Guide

Allegro Front-to-Back User Guide Getting Logical Design Ready for Physical Layout October 2019 42 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Exporting a DE-HDL Design After performing design rules checks, you need to package your design to translate the schematic into a physical design. Packaging involves converting a logical design into a physical layout and vice versa. The utility that completes packaging is Packager-XL. Packager-XL is the interface between the schematic and the board for the front-to-back flow. You can use this utility to do the following: ■ Translate the schematic into a physical design ■ Backannotate the changes made in the board to the schematic ■ Update the changes made in the schematic after initial packaging to the board Packager-XL works in the following two modes: Forward Mode In the Forward mode, Packager-XL translates a logical design entered in Design Entry HDL into a physical design ready for layout in PCB Editor. To run the Forward mode, you need to run the Export Physical command. In the Forward mode, you enter a design in Design Entry HDL, and then run Packager-XL to translate the logical design into a physical design. This process is also known as packaging the design into physical parts. To incorporate incremental design changes into the existing physical design, you can use subsequent Packager-XL runs. To import the packaged design into the PCB Editor environment, you use the PCB Editor Import Logic program. Preparing an OrCAD Capture Design for Physical Layout Before converting your design for PCB Editor, it is a good design practice to verify your design by running Design Rules Check for validating physical rules. When you run the Design Rules Check tool, errors are marked on your schematic pages. Warnings are also marked, provided, the Create DRC markers for warnings check box was selected before running the design rules check. When you run the Design Rules Check tool, Capture creates a report (.DRC) of warning and error messages. You can view the report in a text editor. These messages also appear in the session log.

• 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