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.
Get email delivery of the Cadence blog featured here
With the SPB16.3 release of PCB SI, the Model Editor has been added to allow you to view, update, and check the syntax and data integrity for various models. The first release of the model editor contains simple functions. More utilities, tools, and features will be added in future releases.
The Model Editor is a standalone executable and can be invoked in the console. The command line syntax is:modeleditor –v –t title –r scriptfile file1 file2 …
-v View mode - file cannot be edited-t title Use this as the document title instead of the file path-r scriptfile Replay the script file
The Model Editor can also be invoked through the Model Browser in the PCB SI tools.
Environment VariablesThe following environment variables have been added to the global environment file (<cds_inst_dir>/share/pcb/text/env).
The SI_MODEL_PATH variable is used to configure default directories to contain all models in the library, and are used as the search path in the SI model browser. You can configure these directories in the model editor, and the updated value will be stored in the local environment file ($HOME/pcbenv/env).The variable SI_MODEL_FILE_EXT is used to configure the default file extension for various model formats. The model editor and SI Model Browser use this value to determine the model type for the given model file name and file extension. You can configure these file extensions later in the model editor, and the updated value will be stored in the local environment file ($HOME/pcbenv/env).
Read on for more details ...
The main Model Window editor is shown below:
Format-Associated File Extension DialogModel Editor determines the model format based on the given file extension. The mapping between the file extension and the model format is stored in the system variable SI_MODEL_FILE_EXT. You can change this mapping through the File — File Extension menu. Any changes to this mapping are stored in the local environment file ($HOME/pcbenv/env).
Cadence TabThe fields in the form are defined below:DML Specifies the file extension for a Cadence DML fileESpice Specifies the file extension for a Cadence ESpice modelInterconnect Specifies the file extension for a Cadence interconnect fileSpectre Specifies the file extension for a Cadence Spectre model
IBIS TabGeneric IBIS Specifies the file extension for a generic IBIS fileIBIS Buffer Specifies the file extension for an IBIS Buffer modelIBIS EBD Specifies the file extension for an IBIS EBD modelIBIS ICM Specifies the file extension for an IBIS ICM modelIBIS PinList Specifies the file extension for an IBIS Pin ListIBIS Package Specifies the file extension for an IBIS Package model
Other TabsHSpice Input Specifies the file extension for an HSpice input modelHSpice Output Specifies the file extension for an HSpice output modelQuad Specifies the file extension for a Quad modelGeneric Spice Specifies the file extension for a generic Spice modelTouchStone Specifies the file extension for a Touchstone model
The model library directories are displayed and explored in the dockable Explorer window. You can specify the directories containing all models using the system environment SI_MODEL_PATH. This window explores all model files and directories as a tree. When you change the model library path, the updated value is stored in the local environment file ($HOME/pcbenv/env).
All supported model files with previously-registered file extensions in the system environment SI_MODEL_FILE_EXT are listed in the explorer tree with the appropriate images. You can open a model file by double-clicking the model file in the tree.
By right-clicking in the explorer view, a popup menu is displayed with the following selections:
Syntax-Coloring Editor ViewModel Editor provides with the ability to view and edit model files in a convenient way. It uses a color textual key to distinguish between model data elements and components, such as comment, keyword, operators, or a preprocessor symbol. Syntax-coloring enables you to quickly and correctly identify various elements of the model file.
The primary features of the editor view include:
Color Font setting
You can set the colors and fonts for the syntax-coloring editor.
The component view is associated with the active opened file and acts as a quick navigator for the data and components in the file. When the model file is opened in the editor view, the component hierarchy is displayed in this component view as a tree.
Different images are displayed before the object names to indicate the object type in the model file. You can quickly locate the data in the model file by double-clicking on the item in the component hierarchy tree.
Output Window — Parser ResultsWhen a model file is opened for view and editing, you can select Tools — Parse to check the data. The appropriate parser is invoked to parse the given model file and display results in this output window. When errors are reported, you can double-click the message to quickly locate the line with the error.
Output Window — Find ResultsYou can find and replace text on active or all opened documents in Model Editor. All search or replace information is displayed in the Find Results window. You can double-click the message to quickly locate the contents in the editor.
Please share how you're using the new Model Editor in SPB16.3.
Jerry "GenPart" Grzenia
To download the SPB16.3 Allegro PCB Editor free viewer, go to the SPB products main page - www.cadence.com/.../default.aspx
Then, look for Allegro Downloads in the lower right side - www.cadence.com/.../Downloads.aspx
Here's the direct link -
I am trying to download allegro viewer 16.3