WM8998 datasheet(5/307 Pages) WOLFSON

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Production Data

WM8998

PD, October 2014, Rev 4.0

INTERRUPT CONTROL......................................................................................................................................................... 177

GENERAL PURPOSE INPUT / OUTPUT.............................................................................178

GPIO CONTROL .................................................................................................................................................................... 179

GPIO FUNCTION SELECT .................................................................................................................................................... 181

BUTTON DETECT (GPIO INPUT).......................................................................................................................................... 184

LOGIC ‘1’ AND LOGIC ‘0’ OUTPUT (GPIO OUTPUT)............................................................................................................ 184

INTERRUPT (IRQ) STATUS OUTPUT ................................................................................................................................... 185

OPCLK AND OPCLK_ASYNC CLOCK OUTPUT ................................................................................................................... 185

FREQUENCY LOCKED LOOP (FLL) STATUS OUTPUT ....................................................................................................... 187

FREQUENCY LOCKED LOOP (FLL) CLOCK OUTPUT......................................................................................................... 187

SPDIF AUDIO OUTPUT ......................................................................................................................................................... 188

PULSE WIDTH MODULATION (PWM) SIGNAL OUTPUT...................................................................................................... 188

HEADPHONE DETECTION STATUS OUTPUT ..................................................................................................................... 188

MICROPHONE / ACCESSORY DETECTION STATUS OUTPUT .......................................................................................... 188

OUTPUT SIGNAL PATH ENABLE/DISABLE STATUS OUTPUT............................................................................................ 189

BOOT DONE STATUS OUTPUT............................................................................................................................................ 189

ASYNCHRONOUS SAMPLE RATE CONVERTER (ASRC) LOCK STATUS OUTPUT........................................................... 190

ASYNCHRONOUS SAMPLE RATE CONVERTER (ASRC) CONFIGURATION ERROR STATUS OUTPUT ......................... 190

ISOCHRONOUS SAMPLE RATE CONVERTER (ISRC) CONFIGURATION ERROR STATUS OUTPUT.............................. 190

OVER-TEMPERATURE, SHORT CIRCUIT PROTECTION, AND SPEAKER SHUTDOWN STATUS OUTPUT ..................... 191

DYNAMIC RANGE CONTROL (DRC) STATUS OUTPUT ...................................................................................................... 191

CONTROL WRITE SEQUENCER STATUS OUTPUT ............................................................................................................ 192

CONTROL INTERFACE ERROR STATUS OUTPUT ............................................................................................................. 192

SYSTEM CLOCKS ENABLE STATUS OUTPUT .................................................................................................................... 192

CLOCKING ERROR STATUS OUTPUT................................................................................................................................. 193

GENERAL PURPOSE SWITCH ............................................................................................................................................. 194

INTERRUPTS ......................................................................................................................195

CLOCKING AND SAMPLE RATES ......................................................................................208

SYSTEM CLOCKING ............................................................................................................................................................. 208

SAMPLE RATE CONTROL .................................................................................................................................................... 208

AUTOMATIC SAMPLE RATE DETECTION............................................................................................................................ 209

SYSCLK AND ASYNCCLK CONTROL................................................................................................................................... 210

MISCELLANEOUS CLOCK CONTROLS................................................................................................................................ 213

BCLK AND LRCLK CONTROL ............................................................................................................................................... 219

CONTROL INTERFACE CLOCKING...................................................................................................................................... 220

FREQUENCY LOCKED LOOP (FLL) ..................................................................................................................................... 220

FREE-RUNNING FLL MODE.................................................................................................................................................. 230

SPREAD SPECTRUM FLL CONTROL................................................................................................................................... 232

GPIO OUTPUTS FROM FLL .................................................................................................................................................. 233

EXAMPLE FLL CALCULATION.............................................................................................................................................. 233

EXAMPLE FLL SETTINGS..................................................................................................................................................... 234

CONTROL INTERFACE.......................................................................................................235

CONTROL WRITE SEQUENCER ........................................................................................239

INITIATING A SEQUENCE..................................................................................................................................................... 239

AUTOMATIC SAMPLE RATE DETECTION SEQUENCES..................................................................................................... 240

JACK DETECT, GPIO, MICDET CLAMP, AND WAKE-UP SEQUENCES .............................................................................. 240

DRC SIGNAL DETECT SEQUENCES.................................................................................................................................... 242

BOOT SEQUENCE ................................................................................................................................................................ 243

SEQUENCER OUTPUTS AND READBACK .......................................................................................................................... 243

PROGRAMMING A SEQUENCE............................................................................................................................................ 244

SEQUENCER MEMORY DEFINITION ................................................................................................................................... 245

CHARGE PUMPS, REGULATORS AND VOLTAGE REFERENCE .....................................247

CHARGE PUMPS AND LDO2 REGULATOR ......................................................................................................................... 247

MICBIAS BIAS (MICBIAS) CONTROL.................................................................................................................................... 247

VOLTAGE REFERENCE CIRCUIT......................................................................................................................................... 248

LDO1 REGULATOR AND DCVDD SUPPLY .......................................................................................................................... 248

WM8998 Datasheet(PDF) 5 Page - Wolfson Microelectronics plc

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