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WM8994 데이터시트(PDF) 86 Page - Wolfson Microelectronics plc

부품명 WM8994
상세설명  Multi-Channel Audio Hub CODEC for Smartphones
PDF  359 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8994 데이터시트(HTML) 86 Page - Wolfson Microelectronics plc

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WM8994
Production Data
w
PD, April 2012, Rev 4.4
86
RETUNE
TM MOBILE MODE
ReTune
TM Mobile mode provides a comprehensive facility for the user to define the cut-off/centre
frequencies and filter bandwidth for each EQ band, in addition to the gain controls already described.
This enables the EQ to be accurately customised for a specific transducer characteristic or desired
sound profile.
The EQ enable and EQ gain controls are the same as defined for the default mode. The additional
coefficients used in ReTune
TM Mobile mode are held in registers R1154 to R1171 for AIF1DAC1,
registers R1186 to R1203 for AIF1DAC2 and registers R1410 to R1427 for AIF2. These coefficients
are derived using tools provided in Wolfson’s WISCE™ evaluation board control software.
Please contact your local Wolfson representative for more details.
Note that the WM8994 audio interfaces may operate at different sample rates concurrently. The EQ
settings for each interface must be programmed relative to the applicable sample rate of the
corresponding audio interface. If the audio interface sample rate is changed, then different EQ
register settings will be required to achieve a given EQ response.



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