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WM8904ECS/R 数据表(PDF) 5 Page - Wolfson Microelectronics plc

部件名 WM8904ECS/R
功能描述  Ultra Low Power CODEC for Portable Audio Applications
PDF  188 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8904ECS/R 数据表(HTML) 5 Page - Wolfson Microelectronics plc

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Pre-Production
WM8904
w
PP, Rev 3.3, September 2012
5
AUDIO DATA FORMATS (NORMAL MODE) ................................................................................................................ 92
 
AUDIO DATA FORMATS (TDM MODE)........................................................................................................................ 95
 
DIGITAL AUDIO INTERFACE CONTROL..................................................................... 97 
AUDIO INTERFACE OUTPUT TRI-STATE ................................................................................................................... 98
 
BCLK AND LRCLK CONTROL...................................................................................................................................... 98
 
COMPANDING .............................................................................................................................................................. 99
 
LOOPBACK ................................................................................................................................................................. 101
 
DIGITAL PULL-UP AND PULL-DOWN........................................................................................................................ 101
 
CLOCKING AND SAMPLE RATES............................................................................. 102 
SYSCLK CONTROL .................................................................................................................................................... 103
 
CONTROL INTERFACE CLOCKING .......................................................................................................................... 104
 
CLOCKING CONFIGURATION ................................................................................................................................... 104
 
ADC / DAC CLOCK CONTROL................................................................................................................................... 105
 
OPCLK CONTROL ...................................................................................................................................................... 106
 
TOCLK CONTROL ...................................................................................................................................................... 106
 
ADC / DAC OPERATION AT 88.2K / 96K ................................................................................................................... 107
 
FREQUENCY LOCKED LOOP (FLL).......................................................................... 108 
FREE-RUNNING FLL CLOCK..................................................................................................................................... 112
 
GPIO OUTPUTS FROM FLL ....................................................................................................................................... 113
 
EXAMPLE FLL CALCULATION................................................................................................................................... 113
 
EXAMPLE FLL SETTINGS.......................................................................................................................................... 114
 
GENERAL PURPOSE INPUT/OUTPUT (GPIO) ......................................................... 115 
IRQ/GPIO1................................................................................................................................................................... 115
 
GPIO2 .......................................................................................................................................................................... 116
 
GPIO3 .......................................................................................................................................................................... 116
 
BCLK/GPIO4................................................................................................................................................................ 117
 
INTERRUPTS.............................................................................................................. 118 
USING IN1L AND IN1R AS INTERRUPT INPUTS...................................................................................................... 122
 
CONTROL INTERFACE.............................................................................................. 123 
CONTROL WRITE SEQUENCER............................................................................... 125 
INITIATING A SEQUENCE.......................................................................................................................................... 125
 
PROGRAMMING A SEQUENCE ................................................................................................................................ 126
 
DEFAULT SEQUENCES ............................................................................................................................................. 129
 
START-UP SEQUENCE.............................................................................................................................................. 129
 
SHUTDOWN SEQUENCE........................................................................................................................................... 131
 
POWER-ON RESET.................................................................................................... 133 
QUICK START-UP AND SHUTDOWN........................................................................ 135 
QUICK START-UP (DEFAULT SEQUENCE).............................................................................................................. 135
 
FAST START-UP FROM STANDBY ........................................................................................................................... 135
 
QUICK SHUTDOWN (DEFAULT SEQUENCE)........................................................................................................... 136
 
SOFTWARE RESET AND CHIP ID............................................................................. 137 
REGISTER MAP ................................................................................................ 138 
REGISTER BITS BY ADDRESS ................................................................................. 142 
APPLICATIONS INFORMATION ...................................................................... 181 
RECOMMENDED EXTERNAL COMPONENTS ......................................................... 181 
MIC DETECTION SEQUENCE USING MICBIAS CURRENT..................................... 183 
PACKAGE DIMENSIONS.................................................................................. 185 
IMPORTANT NOTICE ....................................................................................... 187 
ADDRESS ................................................................................................................... 187 
REVISION HISTORY ......................................................................................... 188 



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