WM8777 datasheet(2/102 Pages) WOLFSON

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WM8777

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PP Rev 1.94 November 2004

TABLE OF CONTENTS

DESCRIPTION .......................................................................................................1

FEATURES.............................................................................................................1

APPLICATIONS .....................................................................................................1

TABLE OF CONTENTS .........................................................................................2

PIN CONFIGURATION...........................................................................................3

ORDERING INFORMATION ..................................................................................3

PIN DESCRIPTION ................................................................................................4

ABSOLUTE MAXIMUM RATINGS.........................................................................6

RECOMMENDED OPERATING CONDITIONS .....................................................6

ELECTRICAL CHARACTERISTICS ......................................................................7

TERMINOLOGY .......................................................................................................... 10

SUPPLY CURRENT .............................................................................................11

DEVICE DESCRIPTION .......................................................................................12

INTRODUCTION ......................................................................................................... 12

ANALOGUE TONE CONTROLS ................................................................................. 13

BASS MANAGEMENT................................................................................................. 19

HEADPHONE OUTPUT .............................................................................................. 20

OUTPUT POWERDOWN............................................................................................ 21

DIGITAL AUDIO INTERFACE ROUTING OPTIONS................................................... 22

CONTROL INTERFACE OPERATION ........................................................................ 24

CONTROL INTERFACE TIMING ................................................................................ 27

MASTER CLOCK ........................................................................................................ 29

AUDIO SAMPLING RATES AND AUDIO INTERFACES ............................................. 30

AUDIO INTERFACE FORMATS.................................................................................. 35

DIGITAL AUDIO INTERFACE CONTROL REGISTERS ............................................. 38

POWERDOWN MODES ............................................................................................. 39

MASTER CLOCK AND PHASE LOCKED LOOP......................................................... 42

S/PDIF TRANSCEIVER FEATURES........................................................................... 45

S/PDIF TRANSMITTER............................................................................................... 47

S/PDIF RECEIVER...................................................................................................... 50

DAC CONTROL REGISTERS ..................................................................................... 56

OUTPUT SELECT AND ENABLE CONTROL ............................................................. 65

ADC CONTROL REGISTERS ..................................................................................... 66

LIMITER / AUTOMATIC LEVEL CONTROL (ALC) ...................................................... 68

SOFTWARE REGISTER RESET ................................................................................ 72

DIGITAL FILTER CHARACTERISTICS ...............................................................95

DAC FILTER RESPONSES .................................................................................95

ADC HIGH PASS FILTER ....................................................................................96

DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 97

APPLICATIONS INFORMATION .........................................................................98

EXTERNAL ANALOGUE INPUT CIRCUIT CONFIGURATION ................................... 98

EXTERNAL S/PDIF INPUT CIRCUIT CONFIGURATION ........................................... 99

RECOMMENDED ANALOGUE OUTPUT EXTERNAL COMPONENTS.................... 100

IMPORTANT NOTICE ........................................................................................102

ADDRESS: ................................................................................................................ 102

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