Cadence Design Systems, Inc (NASDAQ: CDNS) is an American electronic design automation (EDA) software and engineering services company, founded in 1988 by the merger of SDA Systems and ECAD, Inc. The company produces software for designing integrated circuits (also known as "chips"), and printed circuit boards.


Cadence is available on CSE and SENS Linux 64-bit systems.

Environment Variables

To initialize your Cadence session, you must first set the Cadence environment variables. The procedures are different on CSE and SENS systems:

CSE Systems

Choose one of these methods to set your Cadence environment variables:

  • Automatically set Cadence environment variables every time you start a new session by adding these lines of code to your .cshrc file:

    # Cadence environment variables
    set domain = `hostname -d`
    if ( ${domain} == '' ) then
       set base_dir = /util/cadence
    else if ( ${domain} == '' ) then
       set base_dir = /util-cse/cadence
    if (-f ${base_dir}/.cshrc_cadence) then
      source ${base_dir}/.cshrc_cadence

  • Manually set Cadence environment variables every time you start a new session by sourcing the .cshrc_cadence file:

    % source /util/cadence/.cshrc_cadence

SENS Systems

Open a terminal window and type:

% use cadence


Compute Systems Feature Release Description Invocation
Red Hat Linux (64-bit) Environment Variables Source this script to set your Cadence environment variables before running any Cadence applications. Cadence applications will fail if you don't set environment variables. % source /util/cadence/.cshrc_cadence
Encounter(R) Test and Diagnostics: ET101 Test and diagnostics software % /util/cadence/et/bin/et
Encounter RTL Compiler RC111 Encounter RTL Compiler allows engineers to look across the entire design as they employ concurrent optimization techniques, such as making tradeoffs among timing, area, and power. % /util/cadence/rc/tools/bin/rc -gui
Encounter(TM) RTL-to-GDSII System EDI1100 Full-chip implementation in a single system. The SoC Encounter System provides fast and flexible feasibility analysis, giving engineers an early, accurate view of whether the most complex designs will meet their targets and be physically realizable. It offers the latest low-power design and yield capabilities and provides a predictable path to design closure. % /util/cadence/edi/bin/encounter
NC-Verilog IUS82 28200: Cadence(R) NC-Verilog(R) Simulator % /util/cadence/ius/tools/bin/nclaunch
OrCAD Allegro SPB165

OrCAD features are available in the following products:

PX3710	Allegro PCB Design CIS-XL
PS2200	Allegro AMS Simulator

% /util/cadence/spb/tools/pcb/bin/allegro
Virtuoso Spectre MMSIM72 38500: Virtuoso(R) Spectre(R) Simulator % /util/cadence/mmsim/tools/bin/spectre
Virtuoso ® IC617 Custom Integrated Circuit (IC) design tools. % /util/cadence/ic/bin/virtuoso -64


Cadence Online Support

UB Cadence students may sign up for Cadence Online Support accounts. This personal account enables you to search the Cadence Online Support database for product information and solutions. You will have access to Cadence Resource Libraries and will be able to subscribe to Cadence Online Support email notifications if you choose.

  1. Email and ask for the Cadence Reference Key.
  2. Visit
  3. Click the Register Now link.
  4. Enter your UBIT Email address (per our license agreement, you must use a university domain email address of the form, select your preferred Site Language, accept Terms of Use, click Accept &Continue.
  5. Enter the Reference Key that cse-consult gave you, click Submit.
  6. Check your UBIT email account Cadence's confirmation message.

Cadence Help System

Access the online Cadence Help system:

% cdnshelp


  1. CSE 493/593 Introduction to VLSI Electronics students: Download init files from:


  2. Cadence's license server runs on helios. The license server process name is FlexLM (lmgrd). The license file is /usr/local/etc/licenses.dat.
  3. Test remote host to Cadence license server connectivity:
    ~% cd /util/cadence/share/license/
    license% ./test_inst


  1. Cheryl Mendenhall, Sr Program Coordinator.
  2. Leo Danilovich, SENS UNIX Administrator.
  3. Ramalingam Sridhar, Principal Investigator and Instructor.
  4. Shambhu Upadhyaya, Principal Investigator and Instructor.