WM8994ECSSLASHR datasheet(3/363 Pages) CIRRUS

3 / 363 page

WM8994

Rev 4.6

INPUT PGA VOLUME CONTROL.................................................................................................................................................50

INPUT MIXER ENABLE.................................................................................................................................................................53

INPUT MIXER CONFIGURATION AND VOLUME CONTROL .....................................................................................................53

DIGITAL MICROPHONE INTERFACE ....................................................................................57

DIGITAL PULL-UP AND PULL-DOWN..........................................................................................................................................60

ANALOGUE TO DIGITAL CONVERTER (ADC) ......................................................................60

ADC CLOCKING CONTROL .........................................................................................................................................................61

DIGITAL CORE ARCHITECTURE ...........................................................................................62

DIGITAL MIXING......................................................................................................................64

AUDIO INTERFACE 1 (AIF1) OUTPUT MIXING...........................................................................................................................65

DIGITAL SIDETONE MIXING........................................................................................................................................................66

DIGITAL SIDETONE VOLUME AND FILTER CONTROL .............................................................................................................66

DAC OUTPUT DIGITAL MIXING...................................................................................................................................................69

AUDIO INTERFACE 2 (AIF2) DIGITAL MIXING ...........................................................................................................................70

ULTRASONIC (4FS) AIF OUTPUT MODE....................................................................................................................................70

DYNAMIC RANGE CONTROL (DRC) .....................................................................................72

DRC COMPRESSION / EXPANSION / LIMITING.........................................................................................................................73

GAIN LIMITS..................................................................................................................................................................................75

DYNAMIC CHARACTERISTICS ...................................................................................................................................................75

ANTI-CLIP CONTROL ...................................................................................................................................................................75

QUICK RELEASE CONTROL .......................................................................................................................................................76

SIGNAL ACTIVITY DETECT .........................................................................................................................................................76

DRC REGISTER CONTROLS.......................................................................................................................................................76

RETUNE MOBILE PARAMETRIC EQUALIZER (EQ)..............................................................86

DEFAULT MODE (5-BAND PARAMETRIC EQ) ...........................................................................................................................86

RETUNE MOBILE MODE..............................................................................................................................................................89

EQ FILTER CHARACTERISTICS .................................................................................................................................................90

3D STEREO EXPANSION .......................................................................................................91

DIGITAL VOLUME AND FILTER CONTROL...........................................................................92

AIF1 - OUTPUT PATH VOLUME CONTROL ................................................................................................................................92

AIF1 - OUTPUT PATH HIGH PASS FILTER .................................................................................................................................95

AIF1 - INPUT PATH VOLUME CONTROL ....................................................................................................................................96

AIF1 - INPUT PATH SOFT MUTE CONTROL ..............................................................................................................................99

AIF1 - INPUT PATH MONO MIX AND DE-EMPHASIS FILTER .................................................................................................100

AIF2 - OUTPUT PATH VOLUME CONTROL ..............................................................................................................................101

AIF2 - OUTPUT PATH HIGH PASS FILTER ...............................................................................................................................102

AIF2 - INPUT PATH VOLUME CONTROL ..................................................................................................................................103

AIF2 - INPUT PATH SOFT MUTE CONTROL ............................................................................................................................103

AIF2 - INPUT PATH MONO MIX AND DE-EMPHASIS FILTER .................................................................................................104

DIGITAL TO ANALOGUE CONVERTER (DAC) ....................................................................105

DAC CLOCKING CONTROL .......................................................................................................................................................105

DAC DIGITAL VOLUME ..............................................................................................................................................................107

DAC SOFT MUTE AND SOFT UN-MUTE ...................................................................................................................................110

ANALOGUE OUTPUT SIGNAL PATH ...................................................................................112

OUTPUT SIGNAL PATHS ENABLE............................................................................................................................................113

HEADPHONE SIGNAL PATHS ENABLE....................................................................................................................................115

OUTPUT MIXER CONTROL .......................................................................................................................................................117

SPEAKER MIXER CONTROL .....................................................................................................................................................121

OUTPUT SIGNAL PATH VOLUME CONTROL...........................................................................................................................124

SPEAKER BOOST MIXER ..........................................................................................................................................................129

EARPIECE DRIVER MIXER........................................................................................................................................................130

LINE OUTPUT MIXERS ..............................................................................................................................................................131

CHARGE PUMP.....................................................................................................................134

DC SERVO.............................................................................................................................136

DC SERVO ENABLE AND START-UP .......................................................................................................................................136

WM8994ECS/R Datasheet(PDF) 3 Page - Cirrus Logic

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