C0402C225M9PAC 데이터 시트보기 (PDF) - Wolfson Microelectronics plc
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C0402C225M9PAC Datasheet PDF : 178 Pages
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Production Data
WM8903
CLOCKING AND SAMPLE RATES................................................................................ 95
CLK_SYS CONTROL ...................................................................................................................................................... 97
CONTROL INTERFACE CLOCKING .............................................................................................................................. 98
AUTOMATIC CLOCKING CONFIGURATION ................................................................................................................. 98
USB CLOCKING MODE ................................................................................................................................................ 100
ADC / DAC OPERATION AT 88.2K / 96K ..................................................................................................................... 100
DIGITAL MICROPHONE (DMIC) OPERATION ............................................................................................................ 101
FREQUENCY LOCKED LOOP (FLL)........................................................................... 101
FREE-RUNNING FLL CLOCK ....................................................................................................................................... 105
GPIO OUTPUTS FROM FLL ......................................................................................................................................... 105
EXAMPLE FLL CALCULATION..................................................................................................................................... 105
EXAMPLE FLL SETTINGS............................................................................................................................................ 106
GENERAL PURPOSE INPUT/OUTPUT (GPIO) .......................................................... 107
INTERRUPTS .............................................................................................................. 112
CONTROL INTERFACE............................................................................................... 115
CONTROL WRITE SEQUENCER................................................................................ 118
INITIATING A SEQUENCE............................................................................................................................................ 118
PROGRAMMING A SEQUENCE .................................................................................................................................. 119
DEFAULT SEQUENCES ............................................................................................................................................... 122
START-UP SEQUENCE ................................................................................................................................................ 122
SHUTDOWN SEQUENCE............................................................................................................................................. 125
POWER-ON RESET .................................................................................................... 127
QUICK START-UP AND SHUTDOWN ........................................................................ 129
QUICK START-UP (DEFAULT SEQUENCE)................................................................................................................ 129
QUICK SHUTDOWN (DEFAULT SEQUENCE) ............................................................................................................ 129
SOFTWARE RESET AND CHIP ID ............................................................................. 130
REGISTER MAP ................................................................................................ 131
REGISTER BITS BY ADDRESS .................................................................................. 134
APPLICATIONS INFORMATION ...................................................................... 172
RECOMMENDED EXTERNAL COMPONENTS .......................................................... 172
MIC DETECTION SEQUENCE USING MICBIAS CURRENT ..................................... 174
PACKAGE DIMENSIONS.................................................................................. 176
IMPORTANT NOTICE ....................................................................................... 177
ADDRESS .................................................................................................................... 177
REVISION HISTORY ......................................................................................... 178
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PD, Rev 4.5, June 2012
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