Cirrus Logic CS6422 manuals

Cirrus logic CS6422 User Manual (48 pages)

Brand: Cirrus-logic | Category: Hardware | Size: 0.85 MB |

English

Table of contents

Features

1

General Description

1

TABLE OF CONTENTS

2

LIST OF FIGURES

4

LIST OF TABLES

4

ABSOLUTE MAXIMUM RATINGS

5

POWER CONSUMPTION

5

ANALOG CHARACTERISTICS (T

5

MICROPHONE AMPLIFIER (T

6

DIGITAL CHARACTERISTICS (T

6

Bit14 Bit2 Bit1

8

Bit0DATA

8

DS295F1 9

9

2. OVERVIEW

10

3. FUNCTIONAL DESCRIPTION

10

3.1 Analog Interface

10

3.1.1 Acoustic Interface

11

3.1.2 Network Interface

12

3.2 Microcontroller Interface

12

3.2.1 Description

12

3.2.2 Register Definitions

13

3.3 Register 0

14

3.3.3 GB - GRADED BETA

15

3.4 Register 1

17

3.5 Register 2

19

3.6 Register 3

22

3.7 Register 4

24

3.8 Register 5

26

3.9 Reset

29

3.9.1 Cold Reset

29

3.9.2 Warm Reset

29

3.9.3 Reset Timer

29

3.10 Clocking

29

3.11 Power Supply

30

3.11.1 Power Down Mode

30

3.11.2 Noise and Grounding

30

4. DESIGN CONSIDERATIONS

32

4.1.1 Full-Duplex Mode

32

4.1.1.1 Theory of Operation

32

4.1.1.2 Adaptive Filter

33

4.1.1.2.1 Pre-Emphasis

33

4.1.1.2.2 Graded Beta

34

4.1.1.3 Update Control

34

4.1.1.4 Speech Detection

34

4.1.2 Half-Duplex Mode

35

4.1.3 AGC

35

4.1.4 Suppression

36

4.1.4.1 Transmit Suppression

37

4.1.4.2 Receive Suppression

37

4.1.4.4 Noise Guard

38

4.2 Circuit Design

38

4.2.1.1 Analog Interface

38

4.2.3 Layout Considerations

39

4.3 System Design

39

4.3.1 Gain Structure

39

4.3.2 Testing Issues

40

4.3.2.1 ERLE

40

4.3.2.2 Convergence Time

41

4.3.2.3 Half-Duplex Switching

41

5. PIN DESCRIPTIONS

42

Miscellaneous

44

NC1 - No Connect, Pin 9

44

NC2 - No Connect, Pin 10

44

NC3 - No Connect, Pin 11

44

NC4 - No Connect, Pin 12

44

6. GLOSSARY

45

7. PACKAGE DIMENSIONS

47

ORDERING INFORMATION

48

REVISION HISTORY

48

Cirrus logic CS6422 User Manual (2 pages)

Brand: Cirrus-logic | Category: Hardware | Size: 0.04 MB |

English

Table of contents

Technical Brief

1

REVISION HISTORY

2

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