WM8945
Production Data
POWER MANAGEMENT ............................................................................................. 102
THERMAL SHUTDOWN.............................................................................................. 103
POWER ON RESET .................................................................................................... 104
RECOMMENDED POWER UP/DOWN SEQUENCE................................................... 106
SOFTWARE RESET AND DEVICE ID......................................................................... 107
REGISTER MAP................................................................................................ 108
REGISTER BITS BY ADDRESS.................................................................................. 113
DIGITAL FILTER CHARACTERISTICS ............................................................ 157
TERMINOLOGY ......................................................................................................................................157
ADC FILTER RESPONSE............................................................................................ 158
ADC HIGHPASS FILTER RESPONSE........................................................................ 159
DAC FILTER RESPONSE............................................................................................ 160
APPLICATIONS INFORMATION ...................................................................... 162
RECOMMENDED EXTERNAL COMPONENTS.......................................................... 162
AUDIO INPUT PATHS.............................................................................................................................162
HEADPHONE / LINE OUTPUT PATHS ..................................................................................................162
BTL SPEAKER OUTPUT CONNECTION ...............................................................................................163
POWER SUPPLY DECOUPLING ...........................................................................................................163
MICROPHONE BIAS CIRCUIT ...............................................................................................................164
VIDEO BUFFER COMPONENTS............................................................................................................165
RECOMMENDED EXTERNAL COMPONENTS DIAGRAM....................................................................166
PCB LAYOUT CONSIDERATIONS ............................................................................. 166
PACKAGE DIMENSIONS.................................................................................. 167
IMPORTANT NOTICE ....................................................................................... 168
ADDRESS:................................................................................................................... 168
REVISION HISTORY ......................................................................................... 169
PD, May 2011, Rev 4.1
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
