ADAU1451 Просмотр технического описания (PDF) - Analog Devices

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ADAU1451

SigmaDSP Digital Audio Processor

Analog Devices 

ADAU1452/ADAU1451/ADAU1450

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram—ADAU1452/ADAU1451 ................. 1

Revision History ............................................................................... 3

General Description ......................................................................... 4

Differences Between the ADAU1452, ADAU1451, and

ADAU1450..................................................................................... 4

Functional Block Diagram—ADAU1450 ...................................... 5

Specifications..................................................................................... 6

Electrical Characteristics ............................................................. 8

Timing Specifications .................................................................. 9

Absolute Maximum Ratings.......................................................... 17

Thermal Characteristics ............................................................ 17

Maximum Power Dissipation ................................................... 17

ESD Caution................................................................................ 17

Pin Configuration and Function Descriptions........................... 18

Theory of Operation ...................................................................... 22

System Block Diagram............................................................... 22

Overview...................................................................................... 22

Initialization ................................................................................ 24

Master Clock, PLL, and Clock Generators.............................. 27

Power Supplies, Voltage Regulator, and Hardware Reset...... 32

Temperature Sensor Diode........................................................ 33

Slave Control Ports..................................................................... 34

Master Control Ports.................................................................. 40

Self Boot....................................................................................... 41

Audio Signal Routing................................................................. 43

Serial Data Input/Output........................................................... 53

Flexible TDM Interface.............................................................. 64

Asynchronous Sample Rate Converters .................................. 69

S/PDIF Interface ......................................................................... 70

Digital PDM Microphone Interface......................................... 72

Multipurpose Pins ...................................................................... 73

Data Sheet

Auxiliary ADC............................................................................ 76

SigmaDSP Core .......................................................................... 76

Software Features ....................................................................... 80

Pin Drive Strength, Slew Rate, and Pull Configuration ........ 81

Global RAM and Control Register Map...................................... 83

Random Access Memory .......................................................... 83

Control Registers ........................................................................ 84

Control Register Details ................................................................ 94

PLL Configuration Registers .................................................... 94

Clock Generator Registers ........................................................ 98

Power Reduction Registers ..................................................... 102

Audio Signal Routing Registers.............................................. 105

Serial Port Configuration Registers ....................................... 111

Flexible TDM Interface Registers........................................... 114

DSP Core Control Registers.................................................... 118

Debug and Reliability Registers.............................................. 123

DSP Program Execution Registers......................................... 131

Multipurpose Pin Configuration Registers .......................... 135

ASRC Status and Control Registers ....................................... 140

Auxiliary ADC Registers......................................................... 143

S/PDIF Interface Registers ...................................................... 144

Hardware Interfacing Registers .............................................. 157

Soft Reset Register.................................................................... 175

Applications Information ............................................................ 176

PCB Design Considerations ................................................... 176

Typical Applications Block Diagram ..................................... 177

Example PCB Layout ............................................................... 178

PCB Manufacturing Guidelines ............................................. 179

Outline Dimensions ..................................................................... 180

Ordering Guide ........................................................................ 180

Automotive Products ............................................................... 180

Rev. C | Page 2 of 180

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