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.
We try to fabricate our chip with MOSIS and submit our design. But
there is an error during DRC ERROR: no CHIPEDGE seen.
We ask help for MOSIS technical support and they say:
"CHIPEDGE is something you can teach Encounter to draw for you",
it is a special Encounter instruction sequence. You will have to search
your Encounter documentation to find it. Search on keywords such as
"drawing a bounding box polygon" or "chamfer" or even "CHIPEDGE" might
give you a hit. With that sequence you can force Encounter to draw the
CHIPEDGE polygon directly".
We search the whole encounter document but cannot get a hit. If anyone know something like this, please help us.
I've always used Virtuoso to design the CHIPEDGE. Usually there is a design kit from the foundry that contains the pieces you need to put it together.
In reply to Kari:
I was wondering if you could provide more details regarding adding the GUARDRING, CHIPEDGE, GUARDEDGE, LOGOBND, etc. I have found some cells in Virtuoso and am also brand new to the tool. Is it fairly easy to modify the chipedge for my die size? Also, do you have any references or advice?
In reply to stblock:
Thank you Kari,
I'm starting by using the crackstop cell that is included by the foundry, but I'm having all types of issues with it. Apparently it is a P-cell, (parameterized cell), but I'm not sure how to modify the properties of it for the dimensions of my die.
My current process is this:
setup cds.lib and open virtuoso, but then I get an error from virtuoso saying
"There is a conflict in techfile graph (cmos32). Look at the techfile reported error message in CIW. Correct techfile conflict before proceeding" Then in the CIW window I get thjese messages:
*WARNING* (TECH-2000178): A Purpose Number conflict has been detected in the technology hierarchy. It is caused by the following list of purposes: cmos32/cont0 (#40), cdsDefTechLib/P40 (#40);
*WARNING* Technology database conflict: There are purpose numbers which conflict in the incremental techlibs
*WARNING* (TECH-2000050): Unable to set references on tech because conflicts would results in tech cmos32
So in my cmos32soi library (specified in my cds.lib), there is a tech.db. Also it appears virtuoso loads the default tech.lib from cdsDefTechLib, but for some reason this is causing a problem that I can't figure out.
If I press okay on the error message window that pops up when virtuoso starts, my procedure is as follows for creating my own crackstop:
I create a new library (Tools-->Library Manager)
In the library list I see the following:
US_8ths, analLib, basic, cdsDefTechLib, cmos32, sample, sbaLib
I then click on File--> New Library, I specify a directory name called mynewlibrary, attach to an existing technology library, set the technology library as cmos32
Then I click on the cmos32 library, highlight the crackstop cell, and create a copy to my 'mynewlibrary'. When I then try and open up the layout view (which is the only view I have), I am unable to edit any of the parameters, I don't know how. Sometimes I am able to select the crackstop, othertimes not, but I am always able to see it.
I was wondering if you have any advice or anything you notice I am doing wrong?
Thank you very much