WM8912GEFL/V Ver la hoja de datos (PDF) - Wolfson Microelectronics plc
Número de pieza
componentes Descripción
Fabricante
WM8912GEFL/V
Wolfson Microelectronics plc
WM8912GEFL/V Datasheet PDF : 128 Pages
| |||
WM8912
Production Data
DIGITAL-TO-ANALOGUE CONVERTER (DAC) ......................................................... 32
DAC DIGITAL VOLUME CONTROL .......................................................................................................................... 32
DAC SOFT MUTE AND SOFT UN-MUTE.................................................................................................................. 34
DAC MONO MIX ........................................................................................................................................................ 35
DAC DE-EMPHASIS.................................................................................................................................................. 35
DAC SLOPING STOPBAND FILTER......................................................................................................................... 36
DAC OVERSAMPLING RATIO (OSR) ....................................................................................................................... 36
OUTPUT SIGNAL PATH ............................................................................................. 37
OUTPUT SIGNAL PATHS ENABLE .......................................................................................................................... 38
HEADPHONE / LINE OUTPUT SIGNAL PATHS ENABLE ........................................................................................ 38
OUTPUT VOLUME CONTROL .................................................................................................................................. 41
ANALOGUE OUTPUTS............................................................................................... 44
HEADPHONE OUTPUTS – HPOUTL AND HPOUTR................................................................................................ 44
LINE OUTPUTS – LINEOUTL AND LINEOUTR ........................................................................................................ 44
EXTERNAL COMPONENTS FOR GROUND REFERENCED OUTPUTS.................................................................. 45
REFERENCE VOLTAGES AND MASTER BIAS ......................................................... 46
CHARGE PUMP .......................................................................................................... 46
DC SERVO.................................................................................................................. 48
DC SERVO ENABLE AND START-UP ...................................................................................................................... 48
DC SERVO ACTIVE MODES .................................................................................................................................... 51
DC SERVO READBACK............................................................................................................................................ 53
DIGITAL AUDIO INTERFACE ..................................................................................... 53
MASTER AND SLAVE MODE OPERATION.............................................................................................................. 53
OPERATION WITH TDM........................................................................................................................................... 54
BCLK FREQUENCY .................................................................................................................................................. 55
AUDIO DATA FORMATS (NORMAL MODE)............................................................................................................. 55
AUDIO DATA FORMATS (TDM MODE) .................................................................................................................... 57
DIGITAL AUDIO INTERFACE CONTROL................................................................... 59
AUDIO INTERFACE OUTPUT TRI-STATE ............................................................................................................... 59
BCLK AND LRCLK CONTROL .................................................................................................................................. 60
COMPANDING .......................................................................................................................................................... 61
DIGITAL PULL-UP AND PULL-DOWN ...................................................................................................................... 63
CLOCKING AND SAMPLE RATES ............................................................................. 64
SYSCLK CONTROL .................................................................................................................................................. 65
CONTROL INTERFACE CLOCKING ......................................................................................................................... 66
CLOCKING CONFIGURATION ................................................................................................................................. 66
DAC CLOCK CONTROL............................................................................................................................................ 67
OPCLK CONTROL .................................................................................................................................................... 67
TOCLK CONTROL .................................................................................................................................................... 68
DAC OPERATION AT 88.2K / 96K ............................................................................................................................ 69
FREQUENCY LOCKED LOOP (FLL) .......................................................................... 70
FREE-RUNNING FLL CLOCK ................................................................................................................................... 73
EXAMPLE FLL CALCULATION ................................................................................................................................. 74
GPIO OUTPUTS FROM FLL ..................................................................................................................................... 75
EXAMPLE FLL SETTINGS ........................................................................................................................................ 75
GENERAL PURPOSE INPUT/OUTPUT (GPIO).......................................................... 76
IRQ/GPIO1 ................................................................................................................................................................ 76
BCLK/GPIO4 ............................................................................................................................................................. 77
INTERRUPTS ............................................................................................................. 78
CONTROL INTERFACE.............................................................................................. 80
CONTROL WRITE SEQUENCER............................................................................... 83
INITIATING A SEQUENCE........................................................................................................................................ 83
PROGRAMMING A SEQUENCE ............................................................................................................................... 84
DEFAULT SEQUENCES ........................................................................................................................................... 86
w
PD, Rev 4.0, September 2010
4
Share Link: