Allegro Front to Back User Guide

Allegro Front-to-Back User Guide Capturing Logical Design October 2019 26 Product Version 17.4-2019 © 1999-2019 All Rights Reserved. Creating a Schematic Using Cadence's schematic design tools, you can easily create a logical design and apply design procedures. The tools are used for capturing a logical design in the printed circuit board (PCB) design flow are: ■ Allegro System Capture ■ OrCAD Capture ■ Design Entry HDL (DE-HDL) With these tools, you can create a project, place parts (components), connect parts, name signals, add ports, and generate parts. Designing Schematic Using System Capture Allegro System Capture helps you design a PCB in a schematic form and add constraints on it. The schematic design is passed to the layout tool, Allegro PCB Editor to place and route the board-level design. Any changes made in the layout are then brought back to the schematic. System Capture for PCB system design System Capture can also be used for system-level designing. The objective of system design with System Capture is to enable design teams to quickly put together parts of the system that they know, create logical parts of the design, distribute those parts to individual teams of design experts. So, system designing is part of the design process right from the block diagrams, where the architects put down their initial thoughts using graphical tools, experiment with the way things are placed, add whatever is known at that time, and add information as the design progresses.

• 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