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WM8974GEFL/V Datasheet(PDF) 22 Page - Wolfson Microelectronics plc

Part # WM8974GEFL/V
Description  Mono CODEC with Speaker Driver
PDF  87 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8974GEFL/V Datasheet(HTML) 22 Page - Wolfson Microelectronics plc

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WM8974
Production Data
w
PD Rev 4.2 March 2007
22
DIGITAL ADC VOLUME CONTROL
The output of the ADCs can be digitally attenuated over a range from –127dB to 0dB in 0.5dB steps.
The gain for a given eight-bit code X is given by:
Gain = 0.5 x (x–255) dB for 1
≤ x ≤ 255, MUTE for x = 0
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R15
ADC Digital
Volume
7:0
ADCVOL
[7:0]
11111111
( 0dB )
ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
Table 13 ADC Volume



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