CS47L35 datasheet(56/300 Pages) CIRRUS

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DS1085F3

CS47L35

4.3 Digital Core

R3713 (0x0E81)

DRC1_ctrl2

12:9 DRC1_ATK[3:0]

0100 DRC1 Gain attack rate (seconds/6 dB)

0000 = Reserved

0001 = 181

s

0010 = 363

s

0011 = 726

s

0100 = 1.45 ms

0101 = 2.9 ms

0110 = 5.8 ms

0111 = 11.6 ms

1000 = 23.2 ms

1001 = 46.4 ms

1010 = 92.8 ms

1011 = 185.6 ms

1100 to 1111 = Reserved

8:5 DRC1_DCY[3:0]

1001 DRC1 Gain decay rate (seconds/6 dB)

0000 = 1.45 ms

0001 = 2.9 ms

0010 = 5.8 ms

0011 = 11.6 ms

0100 = 23.25 ms

0101 = 46.5 ms

0110 = 93 ms

0111 = 186 ms

1000 = 372 ms

1001 = 743 ms

1010 = 1.49 s

1011 = 2.97 s

1100 to 1111 = Reserved

4:2 DRC1_

MINGAIN[2:0]

100

DRC1 Minimum gain to attenuate audio signals

000 = 0 dB

001 = –12 dB

010 = –18 dB

011 = –24 dB

100 = –36 dB

101 = Reserved

11X = Reserved

1:0 DRC1_

MAXGAIN[1:0]

DRC1 Maximum gain to boost audio signals (dB)

00 = 12 dB

01 = 18 dB

10 = 24 dB

11 = 36 dB

R3714 (0x0E82)

DRC1_ctrl3

15:12 DRC1_NG_

MINGAIN[3:0]

0000 DRC1 Minimum gain to attenuate audio signals when the Noise Gate is active.

0000 = –36 dB

0001 = –30 dB

0010 = –24 dB

0011 = –18 dB

0100 = –12 dB

0101 = –6 dB

0110 = 0 dB

0111 = 6 dB

1000 = 12 dB

1001 = 18 dB

1010 = 24 dB

1011 = 30 dB

1100 = 36 dB

1101 to 1111 = Reserved

11:10 DRC1_NG_

EXP[1:0]

DRC1 Noise-Gate slope

00 = 1 (no expansion)

01 = 2

10 = 4

11 = 8

9:8 DRC1_QR_

THR[1:0]

DRC1 Quick-release threshold (crest factor in dB)

00 = 12 dB

01 = 18 dB

10 = 24 dB

11 = 30 dB

7:6 DRC1_QR_

DCY[1:0]

DRC1 Quick-release decay rate (seconds/6 dB)

00 = 0.725 ms

01 = 1.45 ms

10 = 5.8 ms

11 = Reserved

5:3 DRC1_HI_

COMP[2:0]

011

DRC1 Compressor slope (upper region)

000 = 1 (no compression)

001 = 1/2

010 = 1/4

011 = 1/8

100 = 1/16

101 = 0

110 = Reserved

111 = Reserved

2:0 DRC1_LO_

COMP[2:0]

000

DRC1 Compressor slope (lower region)

000 = 1 (no compression)

001 = 1/2

010 = 1/4

011 = 1/8

100 = 0

101 = Reserved

11X = Reserved

R3715 (0x0E83)

DRC1_ctrl4

10:5 DRC1_KNEE_

IP[5:0]

0x00 DRC1 Input signal level at the compressor knee.

0x00 = 0 dB

0x01 = –0.75 dB

0x02 = –1.5 dB

… (–0.75-dB steps)

0x3C = –45 dB

0x3D–-0x3F = Reserved

4:0 DRC1_KNEE_

OP[4:0]

0x00 DRC1 Output signal at the compressor knee.

0x00 = 0 dB

0x01 = –0.75 dB

0x02 = –1.5 dB

… (–0.75 dB steps)

0x1E = –22.5 dB

0x1F = Reserved

R3716 (0x0E84)

DRC1_ctrl5

9:5 DRC1_KNEE2_

IP[4:0]

0x00 DRC1 Input signal level at the noise-gate threshold Knee 2.

0x00 = –36 dB

0x01 = –37.5 dB

0x02 = –39 dB

… (-1.5-dB steps)

0x1E = –81 dB

0x1F = –82.5 dB

Applicable if DRC1_NG_ENA = 1.

4:0 DRC1_KNEE2_

OP[4:0]

0x00 DRC1 Output signal at the noise-gate threshold Knee 2.

0x00 = –30 dB

0x01 = –31.5 dB

0x02 = –33 dB

… (–1.5dB steps)

0x1E = –75 dB

0x1F = –76.5 dB

Applicable only if DRC1_KNEE2_OP_ENA = 1.

Table 4-13. DRC1 Control Registers (Cont.)

Bit

Label

Default

Description

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