CS42L52 datasheet(68/82 Pages) CIRRUS

68 / 82 page

DS680A1

CS42L52

6.33 ALC Release Rate (Address 2Bh)

6.33.1 ALC Release Rate

Sets the rate at which the ALC releases the analog and/or digital attenuation from levels below the

MIN[2:0] threshold (“ALC Minimum Threshold” on page 69) and returns the signal level to the PGAx-

VOL[5:0] (“PGAx Volume” on page 56) and ADCxVOL[7:0] (“ADCx Volume” on page 57) setting.

Notes:

1. The ALC release rate is user-selectable but is also a function of the sampling frequency, Fs, and the

ANLGSFTx (“Ch. x Analog Soft Ramp” on page 49) and ANLGZCx (“Ch. x Analog Zero Cross” on

page 49) setting.

2. The Release Rate setting must always be slower than the Attack Rate.

6.34 ALC Threshold (Address 2Ch)

6.34.1 ALC Maximum Threshold

Sets the maximum level, below full scale, at which to limit and attenuate the input signal at the attack rate

(ALCARATE - “ALC Attack Rate” on page 67).

543

Reserved

ALCRRATE5

ALCRRATE4

ALCRRATE3

ALCRRATE2

ALCRRATE1

ALCRRATE0

ALCRRATE[5:0]

Release Time

00 0000

Fastest Release

···

11 1111

Slowest Release

Application:

“Automatic Level Control (ALC)” on page 27

543

ALCMAX2

ALCMAX1

ALCMAX0

ALCMIN2

ALCMIN1

ALCMIN0

Reserved

MAX[2:0]

Threshold Setting

000

0 dB

001

-3 dB

010

-6 dB

011

-9 dB

100

-12 dB

101

-18 dB

110

-24 dB

111

-30 dB

Application:

“Automatic Level Control (ALC)” on page 27

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