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.
Would like to know how the following can be handled in Encounter flow.
The data path is from a FF to another FF, and both FF are clocked by
the same clock. In the data path, there is an OR gate. One of the input
of the OR gate is from a clock source. The other input of the OR gate
As the OR gate is part of a clock network, the placer does not optimise
it. Hence, during optDesign, due to the high-fanout of the OR gate, the
delay of the OR gate is 200+ns. This result in a huge violation, and
the QOR become bad.
I have tried to use "setAnalysisMode noclksrcpath", but since the source of this path is data, the option does not effect.
I workaround by setting a multicycle path from these 2 FFs during
physical synthesis, and then remove it before clock tree synthesis.
However, is there a better solution for this type of design? Thanks.
Hello Han,IF the output of the OR gate is clock and not data, the placer needs to know that it is a clock gating cell. You must do two things prior to placement and optimization:1) specifyClockTree -clkFile clock_spec.cts2) setPlaceMode -clkGateAwareThis should help the placer to try and find an optimal placement for the OR gate relative to it's leaf cells.IF the output of the OR gate is to a data pin, it should still see the timing path and optimize it.Please let us know if this helps.Best Regards,Mike JacobsCadence Design Systems
The tricky thing is that the output of the OR gate is both clock and data.
One experienced AE advice me that the way to handle this is to use
"setExcludeNet" command. I think the command is a good workaround.
However, I am not using it now as the OR gate is a synthesized gate,
and thus the net name will change with every new synthesized netlist. I
should have fixed the RTL to fix the name of the net (or the OR gate),
but I have yet to do this...
Let me share my view on the above issue,
I divide this in two two topics like FE-CTS and FE-IPO.
In the Case of FE-IPO as we know that The opt command does not affect the Clock nets. In your case "OR" gate has such problem. So you can not use if it is recognised as a Clock path.Work around : Try to make a special SDC with out clock defination and run "optDesign" command for correcting only DRVs by using only "MaxFanout" switch .FE-CTS handling case : use "fixClockExcludedNetDRV" after exclusing data pin .(or )We can perform hight fanout synthesys (FE-CTS) , need to prepare new ctstch clock specification file and specify a clock defenation at the output of "OR" gate and run "ckSynthesis" .Note on this run : we should not give any clock attributes on such nets and NO route. use : -dontFixAddedBuffers ,"-noAddClockRootProp" "-noFixedNonLeafInst" and Route Clk NO (spec file)etc . If you have trace problem on OR gate use "set _case_analysis" in spec file .Regards,Mohan Ch