WM8772 View Datasheet(PDF) - Wolfson Microelectronics plc
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WM8772 Datasheet PDF : 70 Pages
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Production Data
WM8772
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
REGISTER MAP – 32 PIN TQFP .........................................................................55
CONTROL INTERFACE REGISTERS ........................................................................ 56
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PD Rev 4.1 October 2004
3
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