AMBE2000 Datasheet, PDF (4/47 Pages) List of Unclassifed Manufacturers – VOCODER CHIP

AMBE-2000™ Vocoder Chip
User’s Manual Version 3.0
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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