CS42L51 Datasheet, PDF (68/83 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

CS42L51
ALC Attack Rate (ARATE[5:0])
Default: 000000
Binary Code
000000
···
111111
Attack Time
Fastest Attack
···
Slowest Attack
Function:
Sets the rate at which the ALC attenuates the analog input from levels above the maximum setting in the
ALC threshold register.
The limiter attack rate is user-selectable but is also a function of the sampling frequency, Fs, and the SOFTx
& ZCROSSx bit settings unless the disable bit for each function is enabled.
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.
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DS679A2