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WM8994ECS/R Datasheet(PDF) 5 Page - Cirrus Logic

Part # WM8994ECS/R
Description  Multi-channel Audio Hub CODEC for Smartphones
PDF  363 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8994ECS/R Datasheet(HTML) 5 Page - Cirrus Logic

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WM8994
Rev 4.6
5
FREE-RUNNING FLL CLOCK.....................................................................................................................................................206
GPIO OUTPUTS FROM FLL .......................................................................................................................................................207
EXAMPLE FLL CALCULATION...................................................................................................................................................207
EXAMPLE FLL SETTINGS..........................................................................................................................................................208
SAMPLE RATE CONVERSION .............................................................................................209
SAMPLE RATE CONVERTER 1 (SRC1) ....................................................................................................................................209
SAMPLE RATE CONVERTER 2 (SRC2) ....................................................................................................................................209
SAMPLE RATE CONVERTER RESTRICTIONS ........................................................................................................................209
SAMPLE RATE CONVERTER CONFIGURATION ERROR INDICATION .................................................................................211
CONTROL INTERFACE.........................................................................................................212
SELECTION OF CONTROL INTERFACE MODE .......................................................................................................................212
2-WIRE (I2C) CONTROL MODE .................................................................................................................................................213
3-WIRE (SPI) CONTROL MODE.................................................................................................................................................216
4-WIRE (SPI) CONTROL MODE.................................................................................................................................................217
CONTROL WRITE SEQUENCER..........................................................................................218
INITIATING A SEQUENCE..........................................................................................................................................................218
PROGRAMMING A SEQUENCE ................................................................................................................................................219
DEFAULT SEQUENCES .............................................................................................................................................................222
LDO REGULATORS ..............................................................................................................228
POP SUPPRESSION CONTROL ..........................................................................................231
DISABLED LINE OUTPUT CONTROL........................................................................................................................................231
LINE OUTPUT DISCHARGE CONTROL ....................................................................................................................................232
VMID REFERENCE DISCHARGE CONTROL............................................................................................................................232
INPUT VMID CLAMPS ................................................................................................................................................................232
REFERENCE VOLTAGES AND MASTER BIAS ...................................................................233
POWER MANAGEMENT .......................................................................................................235
THERMAL SHUTDOWN ........................................................................................................241
POWER ON RESET...............................................................................................................241
QUICK START-UP AND SHUTDOWN ..................................................................................244
SOFTWARE RESET AND DEVICE ID...................................................................................245
REGISTER MAP ......................................................................................................... 246
REGISTER BITS BY ADDRESS ............................................................................................256
APPLICATIONS INFORMATION ............................................................................... 349
RECOMMENDED EXTERNAL COMPONENTS ....................................................................349
AUDIO INPUT PATHS.................................................................................................................................................................349
HEADPHONE OUTPUT PATH....................................................................................................................................................350
EARPIECE DRIVER OUTPUT PATH..........................................................................................................................................351
LINE OUTPUT PATHS ................................................................................................................................................................351
POWER SUPPLY DECOUPLING ...............................................................................................................................................352
CHARGE PUMP COMPONENTS ...............................................................................................................................................353
MICROPHONE BIAS CIRCUIT ...................................................................................................................................................353
CLASS D SPEAKER CONNECTIONS ........................................................................................................................................354
RECOMMENDED EXTERNAL COMPONENTS DIAGRAM .......................................................................................................356
DIGITAL AUDIO INTERFACE CLOCKING CONFIGURATIONS...........................................357
PCB LAYOUT CONSIDERATIONS .......................................................................................360
CLASS D LOUDSPEAKER CONNECTION ................................................................................................................................360
PACKAGE DIMENSIONS........................................................................................... 361
IMPORTANT NOTICE ................................................................................................ 362
REVISION HISTORY .................................................................................................. 363



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