WM8777
TABLE OF CONTENTS
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DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................6
RECOMMENDED OPERATING CONDITIONS .....................................................6
ELECTRICAL CHARACTERISTICS ......................................................................7
TERMINOLOGY .......................................................................................................... 10
SUPPLY CURRENT .............................................................................................11
DEVICE DESCRIPTION .......................................................................................12
INTRODUCTION ......................................................................................................... 12
ANALOGUE TONE CONTROLS ................................................................................. 13
BASS MANAGEMENT................................................................................................. 19
HEADPHONE OUTPUT .............................................................................................. 20
OUTPUT POWERDOWN............................................................................................ 21
DIGITAL AUDIO INTERFACE ROUTING OPTIONS................................................... 22
CONTROL INTERFACE OPERATION ........................................................................ 24
CONTROL INTERFACE TIMING ................................................................................ 27
MASTER CLOCK ........................................................................................................ 29
AUDIO SAMPLING RATES AND AUDIO INTERFACES ............................................. 30
AUDIO INTERFACE FORMATS.................................................................................. 35
DIGITAL AUDIO INTERFACE CONTROL REGISTERS ............................................. 38
POWERDOWN MODES ............................................................................................. 39
MASTER CLOCK AND PHASE LOCKED LOOP......................................................... 42
S/PDIF TRANSCEIVER FEATURES........................................................................... 45
S/PDIF TRANSMITTER............................................................................................... 47
S/PDIF RECEIVER...................................................................................................... 50
DAC CONTROL REGISTERS ..................................................................................... 56
OUTPUT SELECT AND ENABLE CONTROL ............................................................. 65
ADC CONTROL REGISTERS ..................................................................................... 66
LIMITER / AUTOMATIC LEVEL CONTROL (ALC) ...................................................... 68
SOFTWARE REGISTER RESET ................................................................................ 72
REGISTER MAP...................................................................................................73
DIGITAL FILTER CHARACTERISTICS ...............................................................95
DAC FILTER RESPONSES .................................................................................95
ADC HIGH PASS FILTER ....................................................................................96
DIGITAL DE-EMPHASIS CHARACTERISTICS........................................................... 97
APPLICATIONS INFORMATION .........................................................................98
EXTERNAL ANALOGUE INPUT CIRCUIT CONFIGURATION ................................... 98
EXTERNAL S/PDIF INPUT CIRCUIT CONFIGURATION ........................................... 99
RECOMMENDED ANALOGUE OUTPUT EXTERNAL COMPONENTS.................... 100
IMPORTANT NOTICE ........................................................................................102
ADDRESS: ................................................................................................................ 102
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PP Rev 1.94 November 2004
2
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
