WM8608 ETC-unknow, WM8608 Datasheet - Page 31

• Manufacturer Part Number: WM8608
• Description: The Wm8608 Comprises A High Performance Multi-channel Pwm Digital Power Amplifier Controller. Simply By Adding Appropriate Power Output Stages A Multi-channel Power Amplifier May Be Built. Six Identical Full Audio Bandwidth Channels, Plus A Reduced B
• Manufacturer: ETC-unknow

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GRAPHIC EQUALISER
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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.
Table 26 EQ Band 1 Gain Control
Table 27 EQ Band 2 Gain Control
Table 28 EQ Band 3 Gain Control
R15 (0Fh)
EQ Band 1
Gain Control
R16 (10h)
EQ Band 2
Gain Control
R17 (11h)
EQ Band 3
Gain Control
REGISTER
REGISTER
REGISTER
ADDRESS
ADDRESS
ADDRESS
3:0
7:4
3:0
7:4
3:0
7:4
BIT
BIT
BIT
EQ1GF
[3:0]
EQ1GFC
[7:4]
EQ2GF
[3:0]
EQ2GFC
[7:4]
EQ3GF
[3:0]
EQ3GFC
[7:4]
LABEL
LABEL
LABEL
1111
(Disabled)
1111
(Disabled)
1111
(Disabled)
1111
(Disabled)
1111
(Disabled)
1111
(Disabled)
DEFAULT
DEFAULT
DEFAULT
Band 1 Front-Left/Front-Right Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Band 1 Front-Centre Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Band 2 Front-Left/Front-Right Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Band 2 Front-Centre Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Band 3 Front-Left/Front-Right Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
Band 3 Front-Centre Gain
0000 or 0001 = +9dB
0010 = +7.5dB
… (1.5dB steps)
1011 to 1110 = -6dB
1111 = Disable
DESCRIPTION
DESCRIPTION
DESCRIPTION
PP Rev 1.5 March 2004
WM8608
31