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WM8903 Datasheet(PDF) 145 Page - Wolfson Microelectronics plc

Part # WM8903
Description  Ultra Low Power CODEC for Portable Audio Applications
PDF  178 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8903 Datasheet(HTML) 145 Page - Wolfson Microelectronics plc

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Production Data
WM8903
w
PD, Rev 4.5, June 2012
145
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
4
ADC_HPF_ENA
0
ADC Digital High Pass Filter Enable
0 = disabled
1 = enabled
1
ADCL_DATINV
0
Left ADC Invert
0 = Left ADC output not inverted
1 = Left ADC output inverted
0
ADCR_DATINV
0
Right ADC Invert
0 = Right ADC output not inverted
1 = Right ADC output inverted
Register 26h ADC Digital 0
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R40 (28h)
DRC 0
15
DRC_ENA
0
DRC enable
1 = enabled
0 = disabled
12:11 DRC_THRESH_HYST [1:0]
01
Gain smoothing hysteresis threshold
00 = Low
01 = Medium (recommended)
10 = High
11 = Reserved
10:6
DRC_STARTUP_GAIN
[4:0]
0_0110
Initial gain at DRC startup
00000 = -18dB
00001 = -15dB
00010 = -12dB
00011 = -9dB
00100 = -6dB
00101 = -3dB
00110 = 0dB (default)
00111 = 3dB
01000 = 6dB
01001 = 9dB
01010 = 12dB
01011 = 15dB
01100 = 18dB
01101 = 21dB
01110 = 24dB
01111 = 27dB
10000 = 30dB
10001 = 33dB
10010 = 36dB
10011 to 11111 = Reserved
5
DRC_FF_DELAY
1
Feed-forward delay for anti-clip feature
0 = 5 samples
1 = 9 samples
Time delay can be calculated as 5/fs or 9/ fs,
where fs is the sample rate.
3
DRC_SMOOTH_ENA
1
Gain smoothing enable
0 = disabled
1 = enabled



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