AMBE2000 datasheet(4/47 Pages) ETC

部件名	AMBE2000

功能描述	VOCODER CHIP

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制造商	ETC [List of Unclassifed Manufacturers]

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AMBE-2000™ Vocoder Chip

User’s Manual Version 3.0

page 4

Visit us at www.dvsinc.com

Confidential Proprietary, Subject to Change

1. Product Introduction

6

1.1

General Information

6

1.2

Advantages

6

1.3

Typical Applications

7

2 AMBE™-2000 Application Design Overview

8

2.1 Basic Operation

8

2.2

Initial Design Considerations

8

2.2.1

A/D – D/A Overview

8

2.2.2

Channel Interface Overview

9

2.2.3

Speech and FEC Rate Selection Overview

9

3 Hardware Information

10

3.1 Special Handling Instructions

10

3.1.1

Storage

10

3.2

Pin Descriptions

11

3.3

Clock and Reset Timing

13

3.4

Crystal / Oscillator Usage

14

3.4.1

TTL Clock Source

14

3.4.2

Crystal Oscillator

15

3.5

Package Description

16

3.6

Normal Operating Conditions

17

3.7

Absolute Maximum Ratings

17

3.8

Electrical Characteristics and Requirements

17

4 Channel Interface

19

4.1

Overview

19

4.2

Serial Configuration Selection

19

4.3

Channel Serial Mode

21

4.3.1

Low Level Timing for Passive and Active Serial Mode

22

5 Channel Data Format

24

5.1

Formatted Format

24

5.2

Formatted Input Format

24

5.2.1

Formatted Input : Word 0 : Header

25

5.2.2

Formatted Input : Word 1 : Power Control

25

5.2.3

Formatted Input : Word 1 : Control Word 1

26

5.2.4

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

26

5.2.5

Formatted Input : Word 7 : Unused in Input

27

5.2.6

Formatted Input : Word 8 : Unused in Input

27

5.2.7

Formatted Input : Word 9 : Unused in Input

27

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