Cadence Front to Back EndAdil Sarwar

1. CADENCE CONFIDENTIAL1 CADENCE DESIGN SYSTEMS, INC.
Cadence
Front to Back End
Adil Sarwar
March 2004

2. CADENCE CONFIDENTIAL2
Presentation Overview
• Tool Setup
• Virtuoso Schematic Editor (Composer) for design entry
• Analog Design Environment (Analog Artist) for netlisting and
simulation.
• Virtuoso LE for layout
• Diva for physical Verification
• Mixed-signal simulations / AMS Designer

3. CADENCE CONFIDENTIAL3
Tool Setup
• Source new cshrc file , IC 5.0 installed
• Icfb –W -> to check the version of tool
• cds.lib -> file in directory from where you want to run the tool
• .cdsinit and .env files for initialization and bindkeys
• icms , layoutPlus and icfb

4. CADENCE CONFIDENTIAL4
Cadence Flow Diagram
Virtuoso Custom
Router
Virtuoso Layout Editor
Virtuoso XL
Physical Design Physical Verification
Diva
LPEDRC LVS
Virtuoso Schematic Editor
GDSII
schematics
back annotation
PCell Libraries and
technology files
Rules files,
technology files
Affirma Spectre
Analog Simulator
Parasitic re-simulation

5. CADENCE CONFIDENTIAL5
CIW Window

6. CADENCE CONFIDENTIAL6
Library Manager

7. CADENCE CONFIDENTIAL7
Creating Directories and cds.lib file

8. CADENCE CONFIDENTIAL8
Creating Schematic Cell

9. CADENCE CONFIDENTIAL9
Inverter Schematic

10. CADENCE CONFIDENTIAL10
CDF Parameters

11. CADENCE CONFIDENTIAL11
Adding Pins and Wire names

12. CADENCE CONFIDENTIAL12
Virtuoso – Cell Creation and LSW

13. CADENCE CONFIDENTIAL13
Virtuoso layout

14. CADENCE CONFIDENTIAL14
Inverter Layout

15. CADENCE CONFIDENTIAL15
Giving Terminal Names

16. CADENCE CONFIDENTIAL16
Diva DRC

17. CADENCE CONFIDENTIAL17
DRC Results in CIW Window

18. CADENCE CONFIDENTIAL18
LVS Setup

19. CADENCE CONFIDENTIAL19
LVS Results

20. CADENCE CONFIDENTIAL20
Model and Libraries
• Models from NCSU Kit or From Mosis site
• analogLib library was used for voltage sources and gnd
• basic library was used for pins
• dfII database and environment was used

21. CADENCE CONFIDENTIAL21
Tutorials and Useful sites
• Tutorials available in Cadence Setup
- Go to install directory, the tutorials should be here
- <install_dir>/tools/dfII/samples/tutorials
- cp –r cell_design ~/
- http://www.owlnet.rice.edu/~elec522/w9/virtuoso_layout/
• http://www.ee.princeton.edu/~cadence/usr/
• NCSU site for tarred kit