AMBE2000 datasheet(4/47 Pages) ETC

4 / 47 page

AMBE-2000™ Vocoder Chip

User’s Manual Version 3.0

page 4

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Confidential Proprietary, Subject to Change

1. Product Introduction

1.1

General Information

1.2

Advantages

1.3

Typical Applications

2 AMBE™-2000 Application Design Overview

2.1 Basic Operation

2.2

Initial Design Considerations

2.2.1

A/D – D/A Overview

2.2.2

Channel Interface Overview

2.2.3

Speech and FEC Rate Selection Overview

3 Hardware Information

3.1 Special Handling Instructions

3.1.1

Storage

3.2

Pin Descriptions

3.3

Clock and Reset Timing

3.4

Crystal / Oscillator Usage

3.4.1

TTL Clock Source

3.4.2

Crystal Oscillator

3.5

Package Description

3.6

Normal Operating Conditions

3.7

Absolute Maximum Ratings

3.8

Electrical Characteristics and Requirements

4 Channel Interface

4.1

Overview

4.2

Serial Configuration Selection

4.3

Channel Serial Mode

4.3.1

Low Level Timing for Passive and Active Serial Mode

5 Channel Data Format

5.1

Formatted Format

5.2

Formatted Input Format

5.2.1

Formatted Input : Word 0 : Header

5.2.2

Formatted Input : Word 1 : Power Control

5.2.3

Formatted Input : Word 1 : Control Word 1

5.2.4

Formatted Input : Words 2-6 : Rate Info 0, Rate Info 1, Rate Info 2, Rate Info 3, Rate Info 4

5.2.5

Formatted Input : Word 7 : Unused in Input

5.2.6

Formatted Input : Word 8 : Unused in Input

5.2.7

Formatted Input : Word 9 : Unused in Input

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