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.
I've been updating a few library symbols originally done under 16.3. When doing a "refresh padstacks" in the symbol editor, I get the following log file entry:
INFO: Design is an old-style flash design. Any thermal relief geometries will preserve name but set Geometry to Rectangle.
The library padstacks were done with flash symbols for thermals, but with new "fsm" symbols. The symbol is circa v16.3, so is not the "old style flash design" indicated. The results of the padstack refresh are indeed as indicated. In the design padstack, the thermals are shown with the flash symbol name, but the geometry has indeed been changed from "flash" to "rectangle".
Why?? The padstacks involved are not rectangular, nor are the flash symbols used. Also, on some footprint symbols, after the padstack refresh, the "update symbols" command does not list the thermal flash symbols as used. On some other symbols it does. Must be a new 16.6 "feature".
There is a user preference for "old_style_flash_symbols" which used to be enabled but is now disabled. See the Pad Designer section in the pcoms.pdf, in the doc\pcoms directory of the installation and this:
"New databases (in which the old_style_flash_symbols variable is disabled) draw the actual flash symbol .fsm geometry when you enable Thermal Pads, using true display of flashes and older data that has been updated to exploit this feature. See the flash_convert utility"
(flash_convert is documented in the fcoms.pdf, doc\fcoms directory of the installation)
In reply to oldmouldy:
Thanks OM - but I think my confusion is stemming from the "old style flash symbols" message.
I don't currently have any of those as defined by the flash_convert utility (pre 14.0 or bsm). All of my flash symbols have long since been updated to fsm format. Perhaps the uprev to 16.6 with the old_style_flash_symbols variable unchecked, still recognizes them as old style for some reason? But not consistently - -
Why would some symbols with a "pad refresh" get updated to show "rectangle" instead of "flash" padstack definitions and the flash symbol name is deleted from the dra list (shown when doing a "symbol update"), while some do not. A few of the symbols do not give me the conversion note when doing a padstack refresh. The refresh proceeds successfully, but the design's padstack definitions remain as "flash" thermal definitions and the flash name is still listed in the flash/shape symboll list.
The old_style_flash_symbols is unchecked and the show thermals is off in all of my symbol editor settings, since there are no plane connections to show at that level anyway.
I have re-ran flash_convert in batch mode on all my thermal symbols, as well as dbdoctor to uprev everything to compatibility with 16.5/6 file format. Still the inconsistency persists. I'm just concerned that this will cause problems later when using the symbols in a brd design (which I haven't gotten to just yet). Just trying to avert problems along the way.