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Contents

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1

What is CDF?

Overview

Licensing Requirements

A Typical Application

Levels of CDF Data

CDF Worksheet

2

CDF Commands

CIW CDF Commands

Edit

Edit CDF Form

Copy

Delete

Scale Factors

SKILL CDF Functions

Saving User-Level CDF Information

Using SKILL

Complex Pole Example

Using the Edit CDF Form

NFET Example

Using the Edit CDF Form

Using SKILL

3

Defining Parameters

Overview

Component Parameters

Columns in the Component Parameter Tab

Fields in the Component Parameter Tab

Attributes and Parameter Types

Editing Parameters

Using the Edit CDF Form

Using SKILL

Passing Parameters in a Design

pPar

iPar

atPar

dotPar

Inherited Parameters in Callbacks

Parameterized Cells

Complex Pole Example

Using the Component Parameter Tab

NFET Example

Adding New Parameters

Setting Sample Callbacks

Completing Parameter Definitions

4

Modifying Simulation Information

Overview

Simulation Information Tab

Simulator Options

Editing Simulator Options

Using the Edit CDF Form

Using SKILL

Complex Pole Example

NFET Example

5

Specifying Label Information

Interpreted Labels Information

Parameters(cdsParam)

Terminals(cdsTerm)

Cell/Inst Name(cdsName)

Creating Labels Using the Edit CDF Form

Specifying cdsParam Parameters to Display

The Annotation Setup Form

Creating Labels in the Schematic Editor

Creating Labels with SKILL

Complex Pole Example

NFET Example

6

Other CDF Information

Other Settings Tab

Setting Up Fields and Prompts

Adjusting Button Fields

Adjusting Field Heights

Adjusting Field Widths

Adjusting Prompt Widths

Initialization Procedure

Postprocessing Procedure

7

Writing Callbacks

Overview

Loading Callbacks

Debugging Callbacks

Introducing Debug CDF

Installing Debug CDF

The Debug CDF Assistant User Interface

Starting the Debug Process

Terminating Debug CDF

Starting Debug CDF in Multiple Windows

NFET Example

mosLayout Callback

pcMOSw Callback

pcMOSl Callback

8

Verifying CDF Operation

Testing the Component

Test Procedure

Virtuoso XL Layout Editor Procedure

LVS Procedure

Making Changes

Finishing the NFET Example

Varying the Layout

Changing Parameters

A

Advice and Warnings

B

Troubleshooting CDF Callback

Potential Problems

Resolution

C

Accessing Subcircuit Simulation Data

Overview

Accessing Subcircuit Port Currents

Accessing Subcircuit Model Parameter and Operating Point Information

Accessing Schematic Primitive Model and Operating Point Information

Editing a CDF Description

Writable Cells

Sample CDF

D

NBSIM Transistor CDF SKILL Description

E

CDF Environment Variables

defaultCDFType

defaultDisplay

Glossary

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