WM8944BECSSLASHR datasheet(3/165 Pages) CIRRUS

3 / 165 page

WM8944B

Rev 4.3

QUICK-RELEASE CONTROL .......................................................................................................................................................47

DRC INITIAL CONDITION.............................................................................................................................................................47

DIGITAL-TO-ANALOGUE CONVERTER (DAC)...................................................................... 48

DAC DIGITAL VOLUME CONTROL..............................................................................................................................................48

DAC AUTO-MUTE .........................................................................................................................................................................50

DAC SLOPING STOPBAND FILTER ............................................................................................................................................50

DIGITAL BEEP GENERATOR ................................................................................................. 51

OUTPUT SIGNAL PATH .......................................................................................................... 51

OUTPUT SIGNAL PATHS ENABLE..............................................................................................................................................53

LINE OUTPUT MIXER CONTROL ................................................................................................................................................54

SPEAKER PGA MIXER CONTROL ..............................................................................................................................................55

SPEAKER PGA VOLUME CONTROL...........................................................................................................................................56

SPEAKER OUTPUT CONTROL....................................................................................................................................................58

ANALOGUE OUTPUTS ........................................................................................................... 59

LINE OUTPUT ...............................................................................................................................................................................59

SPEAKER OUTPUTS....................................................................................................................................................................59

EXTERNAL COMPONENTS FOR LINE OUTPUT ........................................................................................................................59

LDO REGULATOR................................................................................................................... 60

REFERENCE VOLTAGES AND MASTER BIAS ..................................................................... 62

POP SUPPRESSION CONTROL ............................................................................................ 65

DISABLED OUTPUT CONTROL...................................................................................................................................................65

OUTPUT DISCHARGE CONTROL ...............................................................................................................................................65

DIGITAL AUDIO INTERFACE.................................................................................................. 66

MASTER AND SLAVE MODE OPERATION.................................................................................................................................66

AUDIO DATA FORMATS ..............................................................................................................................................................67

COMPANDING ..............................................................................................................................................................................70

AUDIO INTERFACE LOOPBACK .................................................................................................................................................72

ADC TO DAC LOOPBACK ............................................................................................................................................................73

DIGITAL PULL-UP AND PULL-DOWN..........................................................................................................................................74

CLOCKING AND SAMPLE RATES.......................................................................................... 74

DIGITAL MIC CLOCKING..............................................................................................................................................................77

FREQUENCY LOCKED LOOP (FLL) ............................................................................................................................................77

EXAMPLE FLL CALCULATION.....................................................................................................................................................81

EXAMPLE FLL SETTINGS............................................................................................................................................................82

VIDEO BUFFER ....................................................................................................................... 83

RECOMMENDED VIDEO BUFFER INITIALISATION SEQUENCES ...........................................................................................85

GENERAL PURPOSE INPUT/OUTPUT .................................................................................. 87

GPIO FUNCTION SELECT ...........................................................................................................................................................88

INTERRUPTS .......................................................................................................................... 89

CONTROL INTERFACE........................................................................................................... 91

SELECTION OF CONTROL INTERFACE MODE .........................................................................................................................91

2-WIRE (I2C) CONTROL MODE ...................................................................................................................................................92

3-WIRE (SPI) CONTROL MODE ...................................................................................................................................................94

WM8944BECS/R 数据表(PDF) 3 Page - Cirrus Logic

WM8944BECS/R 数据表(HTML) 3 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载