WM8903 datasheet(147/178 Pages) WOLFSON

147 / 178 page

Production Data

WM8903

PD, Rev 4.5, June 2012

147

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

3:2

DRC_MINGAIN [1:0]

Minimum gain the DRC can use to attenuate

audio signals

00 = 0dB (default)

01 = -6dB

10 = -12dB

11 = -18dB

1:0

DRC_MAXGAIN [1:0]

Maximum gain the DRC can use to boost

audio signals

00 = 12dB

01 = 18dB (default)

10 = 24dB

11 = 36dB

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R42 (2Ah)

DRC 2

5:3

DRC_R0_SLOPE_COMP

[2:0]

100

Compressor slope R0

000 = 1 (no compression)

001 = 1/2

010 = 1/4

011 = 1/8

100 = 1/16

101 = 0

110 = Reserved

111 = Reserved

2:0

DRC_R1_SLOPE_COMP

[2:0]

000

Compressor slope R1

000 = 1 (no compression)

001 = 1/2

010 = 1/4

011 = 1/8

100 = 0

101 = Reserved

11X = Reserved

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R43 (2Bh)

DRC 3

10:5

DRC_THRESH_COMP

[5:0]

00_0000

Compressor threshold T (dB)

000000 = 0dB

000001 = -0.75dB

000010 = -1.5dB

… (-0.75dB steps)

111100 = -45dB

111101 = Reserved

11111X = Reserved

4:0

DRC_AMP_COMP [4:0]

0_0000

Compressor amplitude at threshold YT (dB)

00000 = 0dB

00001 = -0.75dB

00010 = -1.5dB

… (-0.75dB steps)

WM8903 Datasheet(PDF) 147 Page - Wolfson Microelectronics plc

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