Cadence® system design and verification solutions, integrated under our System Development 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.
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 technlogy. 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
Current design technologies require extremely tight matching requirements right down to the overall net topologies to ensure that any deviations in propagation delays are minimized. As a result, design guidelines call for matching the number of vias for a group of signals. The prior releases of Constraint Manager support a "MAX_VIA_COUNT" constraint which does not meet the needs of these new design requirements. The SPB16.3 Allegro PCB Editor constraint system now supports a method to check for an equal number of vias in addition to a "maximum" number of vias on a group of nets or pin pairs.
Also, prior to the SPB16.3 release, if the Max Via constraint was applied to both nets of an Xnet, the most conservative value would ascend up to the Xnet level. This essentially prevents the control of vias on each side of the pass through device. A behavioral change has been made to the Max Via rule that maintains the constraint values at the net level. If constraining at the Xnet level is desired, the constraint will need to be explicitly applied to it.Read more details below
Match Via DRC
The Match Vias constraint is located in the Electrical domain, Net — Routing — Vias worksheet.
The Match Vias constraint is a boolean ON/OFF assignment. It can be applied to hierarchical objects such as Buses, Net Classes, Diff Pairs and Match Groups. The member with the lowest via count is considered the target or reference object and will indicate a PASS condition. The reference object cannot be reassigned to another member.
A net must be fully routed for a pass/fail condition. An unrouted member would appear in yellow
Max Via DRC
The following figure shows the max via count behavior in SPB16.2. The value of 1 ascended up to the Xnet level, rendering the check useless. Clearly "one value fits all" does not work here.
The Max Vias constraint is now located in the Electrical domain, Net — Routing — Vias worksheet. The constraint is now checked at the net level in an Xnet.
Please let me know how you're using these new SPB16.3 features.
Jerry "GenPart" Grzenia