Cadence® system design and verification solutions, integrated under our Verification Suite, provide the simulation, acceleration, emulation, and management capabilities.
Verification Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
More Support Log In
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technology. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
Get email delivery of the Cadence blog featured here
Components in a design communicate with each other based on some rules or protocols. These protocols contain a group of signals with some relationships defined between them -- for example byte lanes, clock and strobes. The Allegro Design Entry HDL 16.6 release enables the use of these protocols or signal grouping by introducing support for hierarchical interface definitions. These definitions can be entered in the design and can be saved on disk as a library for reuse purposes. This enables the system connectivity authoring at a higher level of abstraction, leading to acceleration in design intent authoring, and also communicates design intent at a higher level to the downstream processes. The grouping of signals can help in planning the PCB implementation by guiding placement and converting of the groups to bundles and help in routing of the board. It can also be used for IC-Package-Board co-design. Read on for more details …New objects have been introduced in the tools for supporting the design flow.Net Groups A Net Group is a collection of net objects which is hierarchical in nature. Different types of Net Objects, such as Nets, Buses, Differential Pairs, XNets, and Net Groups, can be added as members of a Net Group. However, any net object can be a member of one Net Group only. Similarly, a Net Group can be a member of only one Net Group.
Net Groups are created on the fly using the existing design signals. They provide a higher level of abstraction and replace User Defined Buses. Here’s an example of tapping from a Net Group:
Interfaces are library definition of Hierarchical Net Groups. They are defined using a special Interface Editor and can be stored on disk. They can be loaded from a formal definition on disk for instantiation in designs. The existing signals can then be mapped to the Interface instances using Auto Mapping or Manual Mapping.
Net Groups and instances of Interfaces can be used in the designs for faster design authoring.
The Old Model for representing an Interface: – Uses a Vector signal to model an Interface– Manually tap bits & enter signal name– Single Level of Grouping Only– Notes are used to map bits to signals– Common cause of connectivity errors
The New Model for representing an Interface– Leverage Hierarchical Net Group or Interface Object– No more manual mapping of signal to bit– Infinite hierarchical groups– Selection of members done using RMB menus
The new Design Entry HDL (DEHDL) Schematic Operations
– Creation of Hierarchical Net Groups • Schematic Selection • Editor Dialog box– Instantiation of Hierarchical Net Groups / Interfaces • Tapping out members for connectivity– Editing of membership of Hierarchical Net Groups– RMB menu provides access to all Net Group and Interface Members– Dynamic Net Group update by connecting named signal– Auto-naming using patterns– Navigation to instantiated objects– Synchronization & Cross-Probing with Constraint Manager ObjectsConstraints Manager Operations
– Creation of Hierarchical Net Groups– Editing of membership of non-schematic defined Hierarchical Net Groups– Constraining of Hierarchical Net Groups and Interfaces• Application of Constraints Set• Adding and overwrite of constraints
Interface-aware Placement and RoutingYou can display the shape of the auto-generated Interface and the Interface hierarchy can be traversed up / down:
You can do route feasibility analysis, and display the entire Interface at the RatBundle display. You can easily visualize scheduling issues. RatBundles can be edited (split, etc), but with limitations based on Interface hierarchy:
I look forward to your feedback!Jerry “GenPart” Grzenia