CS42L52 Datasheet, PDF (68/82 Pages) Cirrus Logic – Low Power, Stereo CODEC w/Headphone & Speaker Amps

CS42L52
6.33 ALC Release Rate (Address 2Bh)
7
Reserved
6
Reserved
5
4
3
2
1
0
ALCRRATE5 ALCRRATE4 ALCRRATE3 ALCRRATE2 ALCRRATE1 ALCRRATE0
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.
ALCRRATE[5:0]
00 0000
···
11 1111
Application:
Release Time
Fastest Release
···
Slowest Release
“Automatic Level Control (ALC)” on page 27
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)
7
ALCMAX2
6
ALCMAX1
5
ALCMAX0
4
ALCMIN2
3
ALCMIN1
2
ALCMIN0
1
Reserved
0
Reserved
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).
MAX[2:0]
000
001
010
011
100
101
110
111
Application:
Threshold Setting
0 dB
-3 dB
-6 dB
-9 dB
-12 dB
-18 dB
-24 dB
-30 dB
“Automatic Level Control (ALC)” on page 27
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DS680A1