WM8778
Production Data
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
DIGITAL AUDIO INTERFACE – SLAVE MODE ............................................................ 9
3-WIRE MPU INTERFACE TIMING ............................................................................ 11
CONTROL INTERFACE TIMING – 2-WIRE MODE .................................................... 12
INTERNAL POWER ON RESET CIRCUIT ..........................................................13
DEVICE DESCRIPTION.......................................................................................15
INTRODUCTION......................................................................................................... 15
AUDIO DATA SAMPLING RATES............................................................................... 15
ZERO DETECT ........................................................................................................... 17
POWERDOWN MODES ............................................................................................. 17
DIGITAL AUDIO INTERFACE..................................................................................... 17
CONTROL INTERFACE OPERATION........................................................................ 22
CONTROL INTERFACE REGISTERS ........................................................................ 24
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 ....................................................................................50
IMPORTANT NOTICE..........................................................................................51
ADDRESS: .................................................................................................................. 51
PD Rev 4.0 April 2005
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
