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
Beginning with the 16.6 SPB release, FPGA System Planner (FSP) can create net groups automatically whenever an interface is instantiated or a protocol is created. These switches control the auto-creation of those net groups. Turning these on builds the net groups as the design is created:
Read on for more details …The default net group size is 64 signals. Protocols or interfaces with signal groups larger than 64 signals would thus have multiple net groups created. Net groups do not have to be auto-created. Other functionality exists to let you create the net groups later.For interfaces, access to the net groups is via RMB > Configure Connections…RMB on a net group cell opens a pop-up menu:
You can also rename a net group. To place signals in a new net group, select the signals then use Create and Assign New Netgroup:
Selected signals can be manually moved to a different net group. To do this, select the signals, then LMB to get the drop-down on a cell and pick the net group to which you want to move the signal. Remove a signal(s) from a net group by selecting the blank field at the top of the drop-down:
For FPGA protocols the net groups are accessed through the protocol form. The functionality is exactly the same as for interfaces:
A design can be “net grouped” after the fact even if the Settings checkboxes to auto create the net groups are turned off.
Note: Net groups do NOT have to be created in FSP. The design can be forwarded to Allegro with no net groups and the net groups can be created in Allegro and brought back into FSP:
Parts with interface-level constraints must be defined as a single net group.Groups of signals that are constrained in FSP (i.e. “same_bank” or “same_clock_region”) should also be defined as a single net group. The reasons becomes clearer when you get into Allegro and attempt to run the auto pinswap routines. The PCB designer can split the bundles as needed. But, the auto pinswap algorithm doesn’t look simply at the bundle; it looks at the constraints on the signals in the bundle. Thus, the PCB designer cannot arbitrarily create bundles from a group of signals with a “same_clock_region” constraint and expect the tools to let him flowplan those signals anywhere he wants, with no consideration to the other signals. That would violate the FPGA rules.As always – please share your experiences using this new FSP capability!Jerry “GenPart” Grzenia