Common Power Format User Guide -- Table Of Contents

Common Power Format User Guide, Version 2.0

Preface

About This Manual

Additional References

Reporting Problems or Errors in Manuals

Customer Support

Cadence Online Support

Other Support Offerings

Documentation Conventions

1

Introduction

In this Guide

Cadence Tools Supporting the Common Power Format

2

Creating a CPF File

Introduction

Creating a CPF File for an MSV Design

Complete CPF File for MSV Example

Steps to Create the CPF File for MSV Design

Creating a CPF File for a Design Using PSO Methodology

Complete CPF File for PSO Example

Steps to Create the CPF File for Design Using PSO

Creating a CPF File for a Design Using DVFS Methodology

Complete CPF File for DVFS Example

Steps to Create the CPF File for DVFS Design

3

Process of Creating the CPF Content

Overview

Using a Single CPF File

Using Multiple CPF Files

4

Hierarchical Flow

Introduction to Hierarchical Flow

CPF for Hierarchical Flow

Technology CPF File -- tech.cpf

Top CPF File

Macro CPF -- ram.cpf

Soft IP CPF -- tdsp.cpf

Steps to Create the CPF File

Understanding the CPF file of the Macro Cell

Understanding the CPF file of the Soft IP

Creating the CPF File for the Top-Level Design

5

Modeling Special Cells

Modeling Level Shifters

Types of Level Shifters

Modeling a Power Level Shifter

Modeling a Ground Level Shifter

Modeling a Power and Ground Level Shifter

Modeling an Enabled Level Shifter

Modeling a Bypass Level Shifter

Modeling a Multi-Stage Level Shifter

Modeling a Multi-bit Level Shifter Cell

Modeling Isolation Cells

Types of Isolation Cells

Modeling an Isolation Cell to be Placed in the Unswitched Domain

Modeling An Isolation Cell for Ground Switchable Domain

Modeling An Isolation Cell for Power Switchable Domain

Modeling An Isolation Cell for Power and Ground Switchable Domains

Modeling An Isolation Cells that Can Be Placed in Any Domain

Modeling An Isolation Cell Without Enable Pin

Modeling An Isolation Clamp Cell

Modeling an Isolation-Level Shifter Combo Cell

Modeling an Isolation Cell with Multiple Enable Pins

Modeling an Isolation Latch with a Set or Reset Pin

Modeling a Multi-bit Isolation Cell

Modeling a Complex Isolation Cell

Modeling State Retention Cells

Types of State Retention Cells

State Retention Cell that Restores when Power is Turned On

State Retention Cell that Restores when Control Signal is Deactivated

State Retention Cells with Save and Restore Controls

State Retention Cells without Save or Restore Control

Modeling a Complex State Retention Cell

Modeling Power Switch Cells

Types of Power Switch Cells

Modeling a Single Stage Power Switch Cell

Modeling a Power Switch cell with Gate Bias

Modeling a Single Stage Ground Switch Cell

Modeling a Dual-Stage Power Switch Cell

Modeling a Dual-Stage Ground Switch Cell

Modeling Pad Cells

Using a Pad Cell Definition to Create a Simplified Pad Cell Model

Using a CPF Macro Model to Create a Detailed Pad Cell Model

Modeling a Voltage Regulator

Power Domain Mapping of a Power Source Domain

Simulation Semantic

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