CS42L51_07 Datasheet, PDF (71/88 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

CS42L51
6.24 ALC Release Rate (Address 1Dh)
7
Reserved
6
5
4
3
2
1
0
Reserved ALC_RRATE5 ALC_RRATE4 ALC_RRATE3 ALC_RRATE2 ALC_RRATE1 ALC_RRATE0
ALC Release Rate (RRATE[5:0])
Default: 111111
Binary Code
000000
···
111111
Release Time
Fastest Release
···
Slowest Release
Function:
Sets the rate at which the ALC releases the PGA & digital attenuation from levels below the minimum setting
in the ALC threshold register, and returns the input level to the PGA_VOL[4:0] & ADCx_ATT[7:0] setting.
The ALC release rate is user selectable, but is also a function of the sampling frequency, Fs, and the SOFTx
& ZCROSS bit settings unless the disable bit for each function is enabled.
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
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
Threshold
Setting
(dB)
0
-3
-6
DS679F1
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