WM8602SEDSSLASHRV datasheet(26/46 Pages) WOLFSON

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WM8602

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PP Rev 1.5 May 2004

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

1:0

LPHPCO[1:0]

Low-/High-Pass Cutoff Frequency (-3dB)

00 = 75Hz

01 = 100Hz

10 = 133Hz

11 = 178Hz

R13 (0Dh)

Bass

Management

Filter

LFEBOOST

LFE Boost Enable

0 = Boost Disabled

1 = 10dB Boost Enabled

Table 23 Bass Management Filter

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R14 (0Eh)

Bass

Management

HPENF

Left/Right High-Pass Filter

0 = High-Pass Filter bypassed

1 = High-Pass Filter enabled

Filter Bypass

LPENF

Left/Right Low-Pass Filter Enable

0 = Low-Pass Filter output disabled

1 = Low-Pass Filter output enabled

Table 24 Bass Management Filter Bypass

GRAPHIC EQUALISER

The WM8602 has a 4-band Graphic Equaliser on the main channels. The three upper bands are

controlled via registers (see Table 25, Table 26, Table 27 and Table 28). The lowest band is

controlled via the subwoofer volume control (see VOLS in Table 31). 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.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R15 (0Fh)

EQ Band 1

Gain Control

3:0

EQ1GF

[3:0]

1111

(Disabled)

Band 1 Left/Right Gain

0000 or 0001 = +9dB

0010 = +7.5dB

… (1.5dB steps)

1011 to 1110 = -6dB

1111 = Disable

Table 25 EQ Band 1 Gain Control

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R16 (10h)

EQ Band 2

Gain Control

3:0

EQ2GF

[3:0]

1111

(Disabled)

Band 2 Left/Right Gain

0000 or 0001 = +9dB

0010 = +7.5dB

… (1.5dB steps)

1011 to 1110 = -6dB

1111 = Disable

Table 26 EQ Band 2 Gain Control

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