WM8778 datasheet(2/50 Pages) WOLFSON

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WM8778

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PP Rev 1.7 June 2004

TABLE OF CONTENTS

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

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

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

BLOCK DIAGRAM .................................................................................................1

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

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

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

ABSOLUTE MAXIMUM RATINGS .........................................................................5

ELECTRICAL CHARACTERISTICS ......................................................................6

TERMINOLOGY ............................................................................................................ 7

MASTER CLOCK TIMING......................................................................................8

DIGITAL AUDIO INTERFACE – MASTER MODE ......................................................... 8

TABLE 2 DIGITAL AUDIO DATA TIMING – MASTER MODE ....................................... 9

DIGITAL AUDIO INTERFACE – SLAVE MODE ............................................................ 9

3-WIRE MPU INTERFACE TIMING ............................................................................ 11

CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 12

DEVICE DESCRIPTION .......................................................................................13

INTRODUCTION ......................................................................................................... 13

AUDIO DATA SAMPLING RATES............................................................................... 13

ZERO DETECT ........................................................................................................... 15

POWERDOWN MODES ............................................................................................. 15

POWER-ON-RESET ................................................................................................... 15

DIGITAL AUDIO INTERFACE ..................................................................................... 16

CONTROL INTERFACE OPERATION ........................................................................ 21

CONTROL INTERFACE REGISTERS ........................................................................ 23

LIMITER / AUTOMATIC LEVEL CONTROL (ALC) ...................................................... 32

REGISTER MAP ......................................................................................................... 38

DIGITAL FILTER CHARACTERISTICS ...............................................................45

DAC FILTER RESPONSES......................................................................................... 45

ADC FILTER RESPONSES......................................................................................... 46

ADC HIGH PASS FILTER ........................................................................................... 46

DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 47

APPLICATIONS INFORMATION .........................................................................48

RECOMMENDED EXTERNAL COMPONENTS .......................................................... 48

PACKAGE DIMENSIONS ....................................................................................49

IMPORTANT NOTICE ..........................................................................................50

ADDRESS: .................................................................................................................. 50

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