CS42L52 Datasheet, PDF (69/82 Pages) Cirrus Logic – Low Power, Stereo CODEC w/Headphone & Speaker Amps

CS42L52
6.34.2 ALC Minimum Threshold
Sets the minimum level at which to disengage the ALC’s attenuation or amplify the input signal at the re-
lease rate (ALCRRATE - “ALC Release Rate” on page 68) until levels lie between the ALCMAX and AL-
CMIN thresholds.
ALCMIN[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
Note: This setting is usually set slightly below the ALCMAX threshold.
6.35 Noise Gate Control (Address 2Dh)
7
NGALL
6
5
4
NG
NG_BOOST THRESH2
3
THRESH1
2
THRESH0
1
0
NGDELAY1 NGDELAY0
6.35.1 Noise Gate All Channels
Sets which channels are attenuated when clipping on any single channel occurs.
NGALL
0
1
Application:
Noise Gate triggered by:
Individual channel; Any channel that falls below the threshold setting triggers the noise gate attenuation for
both channels.
Both channels A & B; Both channels must fall below the threshold setting for the noise gate attenuation to
take effect.
“Noise Gate” on page 28
6.35.2 Noise Gate Enable
Configures the noise gate.
NG
0
1
Application:
Noise Gate Status
Disabled
Enabled
“Noise Gate” on page 28
DS680A1
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