Cirrus-logic CS6422 Manuale Utente Pagina 44
- Pagina / 48
- Indice
- SEGNALIBRI
- 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
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