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WM1811A Datasheet(PDF) 82 Page - Wolfson Microelectronics plc

Part # WM1811A
Description  Multi-Channel Audio Hub CODEC for Smartphones
PDF  328 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM1811A Datasheet(HTML) 82 Page - Wolfson Microelectronics plc

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WM1811A
Production Data
w
PD, November 2013, Rev 4.1
82
EQ GAIN SETTING
GAIN (dB)
00000
-12
00001
-11
00010
-10
00011
-9
00100
-8
00101
-7
00110
-6
00111
-5
01000
-4
01001
-3
01010
-2
01011
-1
01100
0
01101
+1
01110
+2
01111
+3
10000
+4
10001
+5
10010
+6
10011
+7
10100
+8
10101
+9
10110
+10
10111
+11
11000
+12
11001 to 11111
Reserved
Table 33 EQ Gain Control Range
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 R1172 for AIF1, and
registers R1410 to R1428 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 WM1811A 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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