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.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
This course combines our Allegro PCB Editor Basic Techniques, followed by Allegro PCB Editor Intermediate Techniques.
Virtuoso Analog Design Environment Verifier 16.7
Learn learn to perform requirements-driven analog verification using the Virtuoso ADE Verifier tool.
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.
I’ve got a
problem with lpps on my layout. When I’m trying to display them using cv~>lpps
and then lpps~>layerName and lpps~>purpose I get one result. But when on
the other hand I’m displaying all valid layers due to technology file of my
project I’m unable to get those lpps which I obtained using first approach. What
am I doing wrong? I put my SKILL code below:
printf( "Name: %s purpose %s \n", lpps~>layerName, lpps~>purpose)
printf( "Name: %s purpose %s \n", car(lpps),
mean that layers used in my layout aren’t valid layers due to technology file? What’s
the difference between a valid layer and a normal layer?
additional information: I’m talking about a layout which I obtained after the
extraction process – it’s quite obvious that I would not be able to draw those
layers using some editing tool, because they are not valid… or am I wrong?
A valid layer is simply a layer which you are allowed to draw shapes on. Put another way, it means that the layer shows up in the LSW (there are other ways to further filter the layers in the LSW, but historically this is it).
You can create shapes on any layer/purpose combination using SKILL though, or other means - for example an extracted view. It simply means you can't draw it with the layout editor.
So it would be quite usual to find lpps in your layout (particularly if it's an extracted view) which aren't valid layers. Often net purposes are used in extracted views rather than drawing purposes.
So to summarize - valid layers are just a subset of the complete set of layer purposes.
In reply to Andrew Beckett:
That's what I thought... Thanks Andrew :)