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WM8608 Scheda tecnica(PDF) 31 Page - Wolfson Microelectronics plc

Il numero della parte WM8608
Spiegazioni elettronici  5 TO 7.1 CHANNEL PWM CONTROLLER
PDF  54 Pages
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Produttore elettronici  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8608 Scheda tecnica(HTML) 31 Page - Wolfson Microelectronics plc

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WM8608
w
PP Rev 1.5 March 2004
31
GRAPHIC EQUALISER
The WM8608 has a 4-band Graphic Equaliser on the front three channels. The three upper bands
are controlled via registers (see Table 26, Table 27, Table 28 and Table 29). The lowest band is
controlled via the subwoofer volume control (see VOLS in Table 32). The function has selectable cut-
off frequencies which are independent of sample rate. The boost/cut for the upper three bands is
controllable in 1.5dB steps from -6dB to +9dB via the EQB control bits.
The front-left and front-right controls are tied together, whilst the front-centre controls can be
independently adjusted.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
3:0
EQ1GF
[3:0]
1111
(Disabled)
Band 1 Front-Left/Front-Right Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
R15 (0Fh)
EQ Band 1
Gain Control
7:4
EQ1GFC
[7:4]
1111
(Disabled)
Band 1 Front-Centre Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Table 26 EQ Band 1 Gain Control
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
3:0
EQ2GF
[3:0]
1111
(Disabled)
Band 2 Front-Left/Front-Right Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
R16 (10h)
EQ Band 2
Gain Control
7:4
EQ2GFC
[7:4]
1111
(Disabled)
Band 2 Front-Centre Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Table 27 EQ Band 2 Gain Control
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
3:0
EQ3GF
[3:0]
1111
(Disabled)
Band 3 Front-Left/Front-Right Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
R17 (11h)
EQ Band 3
Gain Control
7:4
EQ3GFC
[7:4]
1111
(Disabled)
Band 3 Front-Centre Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Table 28 EQ Band 3 Gain Control



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