WM1811A Datasheet, PDF (3/328 Pages) Wolfson Microelectronics plc – Multi-Channel Audio Hub CODEC for Smartphones

Production Data
WM1811A
ANALOGUE TO DIGITAL CONVERTER (ADC) ...................................................................... 55
ADC CLOCKING CONTROL .........................................................................................................................................................56
DIGITAL CORE ARCHITECTURE ........................................................................................... 57
DIGITAL MIXING...................................................................................................................... 59
AUDIO INTERFACE 1 (AIF1) OUTPUT DIGITAL MIXING............................................................................................................60
DIGITAL SIDETONE VOLUME AND FILTER CONTROL .............................................................................................................60
DAC OUTPUT DIGITAL MIXING...................................................................................................................................................62
AUDIO INTERFACE 2 (AIF2) OUTPUT DIGITAL MIXING............................................................................................................63
DIGITAL VOLUME (DAC AND AIF2 OUTPUT PATHS)................................................................................................................64
DIGITAL VOLUME SOFT MUTE AND SOFT UN-MUTE ..............................................................................................................67
ULTRASONIC (4FS) AIF OUTPUT MODE....................................................................................................................................69
DYNAMIC RANGE CONTROL (DRC) ..................................................................................... 70
DRC COMPRESSION / EXPANSION /LIMITING..........................................................................................................................71
GAIN LIMITS..................................................................................................................................................................................72
DYNAMIC CHARACTERISTICS ...................................................................................................................................................73
ANTI-CLIP CONTROL ...................................................................................................................................................................73
QUICK RELEASE CONTROL .......................................................................................................................................................73
SIGNAL ACTIVITY DETECT .........................................................................................................................................................73
DRC REGISTER CONTROLS.......................................................................................................................................................74
RETUNE^TM MOBILE PARAMETRIC EQUALIZER (EQ)........................................................... 80
DEFAULT MODE (5-BAND PARAMETRIC EQ) ...........................................................................................................................80
RETUNE^TM MOBILE MODE ...........................................................................................................................................................82
EQ FILTER CHARACTERISTICS .................................................................................................................................................83
3D STEREO EXPANSION ....................................................................................................... 84
DIGITAL VOLUME AND FILTER CONTROL ........................................................................... 85
AIF1 - OUTPUT PATH VOLUME CONTROL ................................................................................................................................85
AIF1 - OUTPUT PATH HIGH PASS FILTER.................................................................................................................................87
AIF1 - INPUT PATH VOLUME CONTROL ....................................................................................................................................88
AIF1 - INPUT PATH SOFT MUTE CONTROL ..............................................................................................................................90
AIF1 - INPUT PATH NOISE GATE CONTROL .............................................................................................................................90
AIF1 - INPUT PATH MONO MIX CONTROL.................................................................................................................................91
AIF2 - OUTPUT PATH VOLUME CONTROL ................................................................................................................................91
AIF2 - OUTPUT PATH HIGH PASS FILTER.................................................................................................................................92
AIF2 - INPUT PATH VOLUME CONTROL ....................................................................................................................................93
AIF2 - INPUT PATH SOFT MUTE CONTROL ..............................................................................................................................94
AIF2 - INPUT PATH NOISE GATE CONTROL .............................................................................................................................95
AIF2- INPUT PATH MONO MIX CONTROL..................................................................................................................................95
DIGITAL TO ANALOGUE CONVERTER (DAC) ...................................................................... 96
DAC CLOCKING CONTROL .........................................................................................................................................................96
ANALOGUE OUTPUT SIGNAL PATH ..................................................................................... 98
OUTPUT SIGNAL PATHS ENABLE..............................................................................................................................................99
HEADPHONE SIGNAL PATHS ENABLE....................................................................................................................................100
OUTPUT MIXER CONTROL .......................................................................................................................................................103
SPEAKER MIXER CONTROL .....................................................................................................................................................107
OUTPUT SIGNAL PATH VOLUME CONTROL...........................................................................................................................109
SPEAKER BOOST MIXER ..........................................................................................................................................................114
EARPIECE DRIVER MIXER........................................................................................................................................................114
LINE OUTPUT MIXERS ..............................................................................................................................................................115
CHARGE PUMP..................................................................................................................... 119
DC SERVO............................................................................................................................. 121
DC SERVO ENABLE AND START-UP .......................................................................................................................................121
GPIO / INTERRUPT OUTPUTS FROM DC SERVO ...................................................................................................................123
ANALOGUE OUTPUTS ......................................................................................................... 124
SPEAKER OUTPUT CONFIGURATIONS...................................................................................................................................124
HEADPHONE OUTPUT CONFIGURATIONS .............................................................................................................................127
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PD, November 2013, Rev 4.1
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