WM8772 datasheet(3/70 Pages) WOLFSON

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Production Data

WM8772

PD Rev 4.1 October 2004

TABLE OF CONTENTS

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

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

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

BLOCK DIAGRAM - 28 PIN SSOP ........................................................................1

BLOCK DIAGRAM – 32 PIN TQFP........................................................................2

TABLE OF CONTENTS .........................................................................................3

PIN CONFIGURATION - 28 LEAD SSOP .............................................................5

ORDERING INFORMATION ..................................................................................5

PIN CONFIGURATION 32 LEAD TQFP...............................................................6

ORDERING INFORMATION ..................................................................................6

PIN DESCRIPTION – 28 LEAD SSOP...................................................................7

PIN DESCRIPTION – 32 LEAD TQFP ...................................................................8

ABSOLUTE MAXIMUM RATINGS .........................................................................9

RECOMMENDED OPERATING CONDITIONS ...................................................10

ADC HIGH PASS FILTER ........................................................................................... 14

DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 14

WM8772EDS – 28 PIN SSOP ..............................................................................16

MASTER CLOCK TIMING ........................................................................................... 16

DIGITAL AUDIO INTERFACE – MASTER MODE ....................................................... 16

MPU INTERFACE TIMING .......................................................................................... 19

INTRODUCTION ......................................................................................................... 20

AUDIO DATA SAMPLING RATES............................................................................... 20

HARDWARE CONTROL MODES ............................................................................... 21

DIGITAL AUDIO INTERFACE ..................................................................................... 23

POWERDOWN MODES ............................................................................................. 27

ZERO DETECT ........................................................................................................... 27

CONTROL INTERFACE REGISTERS ........................................................................ 29

RECOMMENDED EXTERNAL COMPONENTS .......................................................... 37

SUGGESTED ANALOGUE LOW PASS POST DAC FILTERS ................................... 38

WM8722EFT - 32 PIN TQFP ................................................................................41

MASTER CLOCK TIMING ........................................................................................... 41

DIGITAL AUDIO INTERFACE – MASTER MODE ....................................................... 41

MPU INTERFACE TIMING .......................................................................................... 44

DEVICE DESCRIPTION .......................................................................................46

INTRODUCTION ......................................................................................................... 46

AUDIO DATA SAMPLING RATES............................................................................... 46

HARDWARE CONTROL MODES ............................................................................... 47

DIGITAL AUDIO INTERFACE ..................................................................................... 49

POWERDOWN MODES ............................................................................................. 54

ZERO DETECT ........................................................................................................... 54

SOFTWARE CONTROL INTERFACE OPERATION ...........................................54

CONTROL INTERFACE REGISTERS ........................................................................ 56

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