Cadence® system design and verification solutions, integrated under our System Development Suite, provide the simulation, acceleration, emulation, and management capabilities.
System Development 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.
Hai Is there any specific recommendation for XAUI rouitng. If so can anyone say what is the recommendation.Jithu Tharoor
I've never dealt with XAUI, but I have used plenty of fibre channel and PCIe. These are pretty similar.1/ They're diff pairs. Look up the required differential impedance in the spec.2/ Look up the allowed intra lane skew.3/ Look up the lane to lane skew.That should give you a good basis for some simple constraints.Pay special attention to any point that gives an impedance discontinuity, layer changes, BGA breakouts and passives in your diffpair. Make sure your board is properly decoupled.If you're new to high speed signal integrity, I suggest a copy of "High Speed digital design (black magic)" and "High speed signal propagation (advanced balck magic)".If you're looking for someone to give you spacing rules, I doubt you'll get that here - tell your boss he needs to hire a SI engineer.Hope that helps.Mike V
Thanks Mike, what I really want is , here we usually follow 45 degree routing.In some PHY specification it is said like XAUI needs ARC routing(Routing with small angles).I need to confirm like is that roting specific to that PHY or XAUI need ARC routing.Jithu Tharoor
Do you mean 45% champher on bends?Nobody can answer that question, there are too many other variables, like how long is your trace, how good is your impedance control, what are your geometeries within each pair? Even how many bends you're introducing.IF your impedance control is excellent, your traces very short, and you have little crosstalk in your nets, then you will have room for a bit of noise introduced by 45deg or 90 degree bends. Angled corners radiate more than curved ones (which means impedance discontinuities and SI issues too). There is also more skew introduced. Whether you can live with this or not is up to you. Lay it out, run a sim and see.If you're not sure, curvy traces are better for SI. Whilst it may tke you longer, you know that this particular aspect of layout can't be improved. I guess what I'm saying is do the SI work. If you don't have the resources, then you need to balance the cost to your schedule (to add rounded corners) with the risk of getting a card back with "issues". I know nothing about XAUI, will it autonegotiate to a lower speed? Is the card a development prototype, or will this ship to a customer? I don't think there are hard and fast rules. You need to decide based on your application.
Check out the following paper on the subject:http://www.ultracad.com/articles/90deg.pdfI also attended a presentation by Dr.Hubing presenting the results sumamrized in the document which debunk many of the myths of route angles. UMR, Dr.Hubing, or Dr.Van Doren may have other published papers on the subject.