CS42L51 Datasheet, PDF (69/83 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

6.25 ALC Threshold (Address 1Eh)
7
MAX2
6
MAX1
5
MAX0
4
MIN2
Maximum Threshold (MAX[2:0])
Default: 000
MAX[2:0]
000
001
010
011
100
101
110
111
Threshold
Setting
(dB)
0
-3
-6
-9
-12
-18
-24
-30
3
MIN1
CS42L51
2
MIN0
1
Reserved
0
Reserved
Function:
Sets the maximum level, relative to full-scale, at which to limit and attenuate the input signal at the attack
rate.
Minimum Threshold (MIN[2:0])
Default: 000
MIN[2:0]
000
001
010
011
100
101
110
111
Threshold
Setting
(dB)
0
-3
-6
-9
-12
-18
-24
-30
Function:
Sets the minimum level at which to disengage the ALC’s attenuation or amplify the input signal at a rate set
in the release rate register until levels again reach this minimum threshold. The ALC uses this minimum as
a hysteresis point for the input signal as it maintains the signal below the maximum as well as below the
minimum setting. This provides a more natural sound as the ALC attacks and releases.
DS679A2
69