WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 72
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WM8351CGEB/RV
Manufacturer Part Number
WM8351CGEB/RV
Description
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
1.WM8351CGEBRV.pdf
(330 pages)
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WM8351
w
R11 (0Bh)
Power
Mgmt 4
R64 (40h)
ADC
Control
Note: ADC_HPF_ENA can be accessed through R11 or through R64. Reading from or writing to
either register location has the same effect.
ADDRESS
13.5.1
Programmable digital volume control is provided to attenuate the ADC’s output signal.
R66 (42h)
ADC Digital
Volume L
R67 (43h)
ADC Digital
Volume R
Table 27 ADC Volume Control
13.5.2
A digital high-pass filter is provided to remove DC offsets from the ADC signal.
Table 28 Controlling the ADC High-pass Filter
ADDRESS
ADC VOLUME CONTROL
ADC HIGH-PASS FILTER
9:8
BIT
13
15
BIT
7:0
7:0
8
8
ADC_HPF_EN
A
ADC_HPF_CU
T [1:0]
ADC_VU
ADCL_VO
L [7:0]
ADC_VU
ADCR_VO
L [7:0]
LABEL
LABEL
1100_0000
1100_0000
DEFAULT
DEFAULT
0
0
00
0
ADC left and ADC right volume do not update
until a 1 is written to either ADC_VU register
bit.
Left ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -71.625dB
0000 0010 = -71.25dB
... 0.375dB steps up to
1110 1111 = +17.625dB
ADC left and ADC right volume do not update
until a 1 is written to either ADC_VU register
bit.
Right ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -71.625dB
0000 0010 = -71.25dB
... 0.375dB steps up to
1110 1111 = +17.625dB
High Pass Filter enable
0 = disabled
1 = enabled
This bit can be accessed through R11 or
through R64. Reading from or writing to either
register location has the same effect.
Select cut-off frequency for high-pass filter
00 = 2^-11 (first order) = 3.7Hz @
fs=44.1kHz
01 = 2^-5 (2nd order) = ~250Hz @ fs=8kHz
10 = 2^-4 (2nd order) = ~250Hz @ fs=16kHz
11 = 2^-3 (2nd order) = ~250Hz @ fs=32kHz
DESCRIPTION
DESCRIPTION
PD, April 2012, Rev 4.5
Production Data
72
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