CS42L92 datasheet(66/333 Pages) CIRRUS

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DS1162F2

CS42L92

4.3 Digital Core

R3720 (0x0E88)

DRC2_ctrl1

15:11 DRC2_SIG_

DET_RMS[4:0]

0x00

DRC2 Signal-Detect RMS Threshold. This is the RMS signal level for signal-detect to

be indicated when DRC2_SIG_DET_MODE = 1.

0x00 = –30 dB

0x01 = –31.5 dB

…. (1.5-dB steps)

0x1E = –75 dB

0x1F = –76.5 dB

10:9 DRC2_SIG_

DET_PK[1:0]

DRC2 Signal-Detect Peak Threshold. Peak/RMS ratio, or Crest Factor, level for

signal-detect to be indicated when DRC2_SIG_DET_MODE = 0.

00 = 12 dB

01 = 18 dB

10 = 24 dB

11 = 30 dB

DRC2_NG_ENA

DRC2 Noise-Gate Enable

0 = Disabled

1 = Enabled

DRC2_SIG_

DET_MODE

DRC2 Signal-Detect Mode

0 = Peak threshold mode

1 = RMS threshold mode

DRC2_SIG_DET

DRC2 Signal-Detect Enable

0 = Disabled

1 = Enabled

DRC2_KNEE2_

OP_ENA

DRC2 KNEE2_OP Enable

0 = Disabled

1 = Enabled

DRC2_QR

DRC2 Quick-release Enable

0 = Disabled

1 = Enabled

DRC2_ANTICLIP

DRC2 Anticlip Enable

0 = Disabled

1 = Enabled

R3721 (0x0E89)

DRC2_ctrl2

12:9 DRC2_ATK[3:0]

0100

DRC2 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 DRC2_DCY[3:0]

1001

DRC2 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 DRC2_

MINGAIN[2:0]

100

DRC2 Minimum gain to attenuate audio signals

000 = 0 dB

001 = –12 dB (default)

010 = –18 dB

011 = –24 dB

100 = –36 dB

101 = Reserved

11X = Reserved

1:0 DRC2_

MAXGAIN[1:0]

DRC2 Maximum gain to boost audio signals (dB)

00 = 12 dB

01 = 18 dB

10 = 24 dB

11 = 36 dB

Table 4-18. DRC2 Control Registers (Cont.)

Bit

Label

Default

Description

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