wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 5

• Manufacturer Part Number: wm8351
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

Production Data
12
13
w
12.1
12.2
12.3
12.4
13.1
13.2
13.3
13.4
13.5
13.6
13.7
13.8
13.9
13.10
13.11
13.12
CLOCKING, TIMING AND SAMPLE RATES ..............................................45
12.1.1
12.1.2
12.1.3
12.3.1
12.3.2
12.3.3
12.3.4
12.3.5
12.3.6
12.4.1
12.4.2
AUDIO CODEC SUBSYSTEM.....................................................................60
13.4.1
13.4.2
13.4.3
13.4.4
13.4.5
13.4.6
13.4.7
13.5.1
13.5.2
13.6.1
13.7.1
13.7.2
13.7.3
13.7.4
13.7.5
13.8.1
13.8.2
13.9.1
13.9.2
13.9.3
13.9.4
13.10.1
13.10.2
13.10.3
13.10.4
GENERAL DESCRIPTION ............................................................................. 45
CRYSTAL OSCILLATOR................................................................................ 46
CLOCKING AND SAMPLE RATES ................................................................ 47
FLL ................................................................................................................. 55
GENERAL DESCRIPTION ............................................................................. 60
AUDIO PATHS ............................................................................................... 61
ENABLING THE AUDIO CODEC ................................................................... 63
INPUT SIGNAL PATH .................................................................................... 65
ANALOGUE TO DIGITAL CONVERTER (ADC) ............................................. 72
DIGITAL MIXING............................................................................................ 74
DIGITAL TO ANALOGUE CONVERTER (DAC) ............................................. 75
OUTPUT SIGNAL PATH ................................................................................ 79
ANALOGUE OUTPUTS.................................................................................. 83
DIGITAL AUDIO INTERFACE ........................................................................ 91
COMPANDING ............................................................................................... 97
ADDITIONAL CODEC FUNCTIONS............................................................... 99
CLOCKING THE AUDIO CODEC ........................................................................................ 46
CLOCKING THE DC-DC CONVERTERS ............................................................................ 46
INTERNAL RC OSCILLATOR.............................................................................................. 46
SYSCLK CONTROL............................................................................................................. 49
ADC / DAC SAMPLE RATES............................................................................................... 50
BCLK CONTROL ................................................................................................................. 52
ADCLRCLK / DACLRCLK CONTROL ................................................................................. 54
OPCLK CONTROL .............................................................................................................. 55
SLOWCLK CONTROL ......................................................................................................... 55
EXAMPLE FLL CALCULATION ........................................................................................... 58
EXAMPLE FLL SETTINGS .................................................................................................. 59
MICROPHONE INPUTS ...................................................................................................... 65
ENABLING THE PRE-AMPLIFIERS .................................................................................... 66
SELECTING INPUT SIGNALS............................................................................................. 66
CONTROLLING THE PRE-AMPLIFIER GAINS................................................................... 67
MICROPHONE BIASING ..................................................................................................... 68
AUXILIARY INPUTS (IN3L AND IN3R)................................................................................ 69
INPUT MIXERS.................................................................................................................... 70
ADC VOLUME CONTROL ................................................................................................... 73
ADC HIGH-PASS FILTER.................................................................................................... 73
DIGITAL SIDETONE ............................................................................................................ 74
DAC PLAYBACK VOLUME CONTROL ............................................................................... 76
DAC SOFT MUTE AND SOFT UN-MUTE............................................................................ 76
DAC DE-EMPHASIS ............................................................................................................ 77
DAC OUTPUT PHASE AND MONO MIXING....................................................................... 78
DAC STOPBAND ATTENUATION....................................................................................... 78
ENABLING THE ANALOGUE OUTPUTS ............................................................................ 79
OUTPUT MIXERS................................................................................................................ 80
OUT1L AND OUT1R............................................................................................................ 83
OUT2L AND OUT2R............................................................................................................ 85
HEADPHONE OUTPUTS EXTERNAL CONNECTIONS ..................................................... 87
OUT3 AND OUT4 ................................................................................................................ 89
AUDIO DATA FORMATS................................................................................................. 91
AUDIO INTERFACE TDM MODE .................................................................................... 94
TDM DATA FORMATS..................................................................................................... 94
LOOPBACK ..................................................................................................................... 97
PD, June 2009, Rev 4.1
WM8351
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