WM8958 datasheet(80/377 Pages) WOLFSON

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WM8958

Pre-Production

PP, August 2012, Rev 3.4

DRC REGISTER CONTROLS

The AIF1DRC1 control registers are described in Table 30. The AIF1DRC2 control registers are

described in Table 31. The AIF2DRC control registers are described in Table 32.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1088 (0440h)

AIF1 DRC1 (1)

AIF1DRC1_NG_

ENA

AIF1 DRC1 Noise Gate Enable

0 = Disabled

1 = Enabled

AIF1DRC1_KNE

E2_OP_ENA

AIF1 DRC1 KNEE2_OP Enable

0 = Disabled

1 = Enabled

AIF1DRC1_QR

AIF1 DRC1 Quick-release Enable

0 = Disabled

1 = Enabled

AIF1DRC1_ANTI

CLIP

AIF1 DRC1 Anti-clip Enable

0 = Disabled

1 = Enabled

R1089 (0441h)

AIF1 DRC1 (2)

12:9

AIF1DRC1_ATK

[3:0]

0100

AIF1 DRC1 Gain attack rate

(seconds/6dB)

0000 = Reserved

0001 = 181us

0010 = 363us

0011 = 726us

0100 = 1.45ms

0101 = 2.9ms

0110 = 5.8ms

0111 = 11.6ms

1000 = 23.2ms

1001 = 46.4ms

1010 = 92.8ms

1011 = 185.6ms

1100-1111 = Reserved

8:5

AIF1DRC1_DCY

[3:0]

0010

AIF1 DRC1 Gain decay rate

(seconds/6dB)

0000 = 186ms

0001 = 372ms

0010 = 743ms

0011 = 1.49s

0100 = 2.97s

0101 = 5.94s

0110 = 11.89s

0111 = 23.78s

1000 = 47.56s

1001-1111 = Reserved

4:2

AIF1DRC1_MIN

GAIN [2:0]

001

AIF1 DRC1 Minimum gain to

attenuate audio signals

000 = 0dB

001 = -12dB (default)

010 = -18dB

011 = -24dB

100 = -36dB

101 = Reserved

11X = Reserved

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