wm8350 Wolfson Microelectronics plc, wm8350 Datasheet - Page 5

• Manufacturer Part Number: wm8350
• 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
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 ..................................................................... 62
INPUT SIGNAL PATH ...................................................................................... 63
ANALOGUE TO DIGITAL CONVERTER (ADC) .............................................. 72
DIGITAL MIXING .............................................................................................. 74
DIGITAL TO ANALOGUE CONVERTER (DAC) .............................................. 76
OUTPUT SIGNAL PATH .................................................................................. 80
ANALOGUE OUTPUTS.................................................................................... 84
DIGITAL AUDIO INTERFACE .......................................................................... 92
COMPANDING ................................................................................................. 98
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 ......................................................................................................63
ENABLING THE PRE-AMPLIFIERS ....................................................................................64
SELECTING INPUT SIGNALS.............................................................................................65
CONTROLLING THE PRE-AMPLIFIER GAINS...................................................................66
MICROPHONE BIASING .....................................................................................................67
AUXILIARY INPUTS (IN3L AND IN3R)................................................................................67
INPUT MIXERS.................................................................................................................... 69
ADC VOLUME CONTROL ...................................................................................................73
ADC HIGH-PASS FILTER....................................................................................................73
DIGITAL SIDETONE ............................................................................................................74
DAC PLAYBACK VOLUME CONTROL ...............................................................................77
DAC SOFT MUTE AND SOFT UN-MUTE ...........................................................................77
DAC DE-EMPHASIS ............................................................................................................78
DAC OUTPUT PHASE AND MONO MIXING ......................................................................79
DAC STOPBAND ATTENUATION.......................................................................................79
ENABLING THE ANALOGUE OUTPUTS ............................................................................80
OUTPUT MIXERS................................................................................................................81
OUT1L AND OUT1R ............................................................................................................84
OUT2L AND OUT2R ............................................................................................................86
HEADPHONE OUTPUTS EXTERNAL CONNECTIONS .....................................................88
OUT3 AND OUT4.................................................................................................................90
AUDIO DATA FORMATS.................................................................................................92
AUDIO INTERFACE TDM MODE ....................................................................................95
TDM DATA FORMATS ....................................................................................................95
LOOPBACK......................................................................................................................97
PD, June 2009, Rev 4.1
WM8350
5