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.
Can anyone explain how to set relative propagation delay constraint in constraint manager.
Is there any guidelines on how to set other constraints using constraint manager.
Thanks in advance,
Realtive propagation delays are all about creating matched groups (MGs). A group of objects with either a matched length, or propagation delay.An object can be a net, an xnet (2 nets joined by a passive with an espice model) or a pin pairConstraint manager (CM) allows you to specify one object as the target, then all other onjects in the MG must match this. Each of the other objects may be given a delta and a tolerance.Finally you need to decide on the scope of the MG.Let's take a data bus with source series termination as an example. Lets say that you create a EC Set with the following items in a MG.1. The pin pair defining the link from the uP to the terminator.2. The pin pair defining the link from the terminator to the memory device.You then apply the EC set to all the xnets in the data bus.Setting the MG scope to Local. Within each Xnet, the pin pairs 1. and 2. will match. From xnet to xnet, the pin pairs will not match.So the terminator will be half way along the xnet for every bit in the bus, but the bits will be different lengths.Setting the MG scope to global. Within each Xnet, the pin pairs 1. and 2. will match. From xnet to xnet, the pin pairs will also match.So the terminator will be half way along the xnet for every bit in the bus, and every bit in the bus will be the same length.There are two other MG Scopes, bus (>15.7) and class (>16.0). This presentation gives an example of how bus scope works. Class scope is similar, and would avoid the need to redraw the schematic.http://www.cdnusers.org/community/allegro/Resources/kits_designin/memory/stp_cdnliveemea07_ddrconstraints_veal.pdfGood luck,