wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 5

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
REGISTER MAP ................................................................................................. 128
REGISTER BITS BY ADDRESS ........................................................................ 132
APPLICATIONS INFORMATION ....................................................................... 170
PACKAGE DIMENSIONS .................................................................................. 174
IMPORTANT NOTICE ........................................................................................ 175
ADDRESS .......................................................................................................... 175
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CLOCKING AND SAMPLE RATES ............................................................................. 93
FREQUENCY LOCKED LOOP (FLL) .......................................................................... 99
GENERAL PURPOSE INPUT/OUTPUT (GPIO)........................................................ 106
INTERRUPTS ........................................................................................................... 108
CONTROL INTERFACE ............................................................................................ 113
CONTROL WRITE SEQUENCER ............................................................................. 115
POWER-ON RESET ................................................................................................. 123
QUICK START-UP AND SHUTDOWN ...................................................................... 125
SOFTWARE RESET AND CHIP ID ........................................................................... 127
RECOMMENDED EXTERNAL COMPONENTS ........................................................ 170
MIC DETECTION SEQUENCE USING MICBIAS CURRENT.................................... 172
AUDIO INTERFACE OUTPUT TRI-STATE ............................................................................................................... 89
BCLK AND LRCLK CONTROL .................................................................................................................................. 89
COMPANDING .......................................................................................................................................................... 90
LOOPBACK ............................................................................................................................................................... 92
DIGITAL PULL-UP AND PULL-DOWN ...................................................................................................................... 92
SYSCLK CONTROL .................................................................................................................................................. 95
CONTROL INTERFACE CLOCKING ......................................................................................................................... 95
CLOCKING CONFIGURATION ................................................................................................................................. 96
DMIC / DAC CLOCK CONTROL ................................................................................................................................ 96
OPCLK CONTROL .................................................................................................................................................... 97
TOCLK CONTROL .................................................................................................................................................... 97
DAC OPERATION AT 88.2K / 96K ............................................................................................................................ 98
FREE-RUNNING FLL CLOCK ................................................................................................................................. 103
GPIO OUTPUTS FROM FLL ................................................................................................................................... 103
EXAMPLE FLL CALCULATION ............................................................................................................................... 104
EXAMPLE FLL SETTINGS ...................................................................................................................................... 105
IRQ/GPIO1 .............................................................................................................................................................. 106
BCLK/GPIO4 ........................................................................................................................................................... 107
USING IN1L AND IN1R AS INTERRUPT INPUTS................................................................................................... 112
INITIATING A SEQUENCE ...................................................................................................................................... 115
PROGRAMMING A SEQUENCE ............................................................................................................................. 116
DEFAULT SEQUENCES ......................................................................................................................................... 119
START-UP SEQUENCE .......................................................................................................................................... 119
SHUTDOWN SEQUENCE ....................................................................................................................................... 121
QUICK START-UP (DEFAULT SEQUENCE) .......................................................................................................... 125
FAST START-UP FROM STANDBY ........................................................................................................................ 125
QUICK SHUTDOWN (DEFAULT SEQUENCE) ....................................................................................................... 126
PD, Rev 4.0, September 2010
WM8918
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