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WM8281ECS/R Scheda tecnica(PDF) 90 Page - Cirrus Logic

Il numero della parte WM8281ECS/R
Spiegazioni elettronici  Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation
PDF  392 Pages
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Produttore elettronici  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8281ECS/R Scheda tecnica(HTML) 90 Page - Cirrus Logic

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WM8281
90
Rev 4.0
The control registers associated with the LHPF functions are described in Table 17.
The cut-off frequencies for the LHPF blocks are set using the coefficients held in registers R3777,
R3781, R3785 and R3789 for LHPF1, LHPF2, LHPF3 and LHPF4 respectively. These coefficients are
derived using tools provided in Cirrus Logic
’s WISCE™ evaluation board control software; please
contact your local Cirrus Logic representative for more details.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R3585
(0E01h)
FX_Ctrl2
15:4
FX_STS [11:0]
00h
LHPF, DRC, EQ Enable Status
Indicates the status of each of the
respective signal processing functions.
[11] = EQ4
[10] = EQ3
[9] = EQ2
[8] = EQ1
[7] = DRC2 (Right)
[6] = DRC2 (Left)
[5] = DRC1 (Right)
[4] = DRC1 (Left)
[3] = LHPF4
[2] = LHPF3
[1] = LHPF2
[0] = LHPF1
Each bit is coded as:
0 = Disabled
1 = Enabled
R3776
(0EC0h)
HPLPF1_
1
1
LHPF1_MODE
0
Low/High Pass Filter 1 Mode
0 = Low-Pass
1 = High-Pass
0
LHPF1_ENA
0
Low/High Pass Filter 1 Enable
0 = Disabled
1 = Enabled
R3777
(0EC1h)
HPLPF1_
2
15:0
LHPF1_COEFF
[15:0]
0000h
Low/High Pass Filter 1 Frequency
Coefficient
Refer to WISCE evaluation board control
software for the deriviation of this field
value.
R3780
(0EC4h)
HPLPF2_
1
1
LHPF2_MODE
0
Low/High Pass Filter 2 Mode
0 = Low-Pass
1 = High-Pass
0
LHPF2_ENA
0
Low/High Pass Filter 2 Enable
0 = Disabled
1 = Enabled
R3781
(0EC5h)
HPLPF2_
2
15:0
LHPF2_COEFF
[15:0]
0000h
Low/High Pass Filter 2 Frequency
Coefficient
Refer to WISCE evaluation board control
software for the deriviation of this field
value.
R3784
(0EC8h)
HPLPF3_
1
1
LHPF3_MODE
0
Low/High Pass Filter 3 Mode
0 = Low-Pass
1 = High-Pass
0
LHPF3_ENA
0
Low/High Pass Filter 3 Enable
0 = Disabled
1 = Enabled
R3785
(0EC9h)
HPLPF3_
2
15:0
LHPF3_COEFF
[15:0]
0000h
Low/High Pass Filter 3 Frequency
Coefficient
Refer to WISCE evaluation board control
software for the deriviation of this field
value.



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