WM8522
Pre-Production
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION 28 LEAD SSOP...............................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION – 28 LEAD SSOP...................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................5
RECOMMENDED OPERATING CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................6
TERMINOLOGY............................................................................................................ 7
MASTER CLOCK TIMING............................................................................................. 7
DIGITAL AUDIO INTERFACE – MASTER MODE......................................................... 8
DIGITAL AUDIO INTERFACE – SLAVE MODE ............................................................ 9
MPU INTERFACE TIMING.......................................................................................... 10
INTERNAL POWER ON RESET CIRCUIT ..........................................................11
DEVICE DESCRIPTION.......................................................................................12
INTRODUCTION......................................................................................................... 12
AUDIO DATA SAMPLING RATES............................................................................... 12
HARDWARE CONTROL MODES ............................................................................... 13
DIGITAL AUDIO INTERFACE..................................................................................... 15
POWERDOWN MODES ............................................................................................. 18
SOFTWARE CONTROL INTERFACE OPERATION................................................... 19
CONTROL INTERFACE REGISTERS ........................................................................ 19
REGISTER MAP...................................................................................................30
REGISTER MAP DESCRIPTION .........................................................................31
DIGITAL FILTER CHARACTERISTICS...............................................................34
DAC FILTER RESPONSES .................................................................................34
DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 35
APPLICATIONS INFORMATION .........................................................................36
RECOMMENDED EXTERNAL COMPONENTS.......................................................... 36
SUGGESTED ANALOGUE LOW PASS POST DAC FILTERS................................... 37
PACKAGE DIMENSIONS ....................................................................................38
IMPORTANT NOTICE..........................................................................................39
ADDRESS: .................................................................................................................. 39
PP Rev 3.1 May 2006
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
