CS42L55 Datasheet, PDF (62/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

CS42L55
6.27.3 Limiter Release Rate
Sets the rate at which the limiter releases the digital attenuation from levels below the CUSH[2:0] thresh-
old (“Limiter Cushion Threshold” on page 61) and returns the analog output level to the MSTxVOL[7:0]
(“Master Volume Control” on page 57) setting.
LIMRRATE[5:0]
00 0000
···
11 1111
Application:
Release Time
Fastest Release
···
Slowest Release
“Limiter” on page 32
Note: The limiter release rate is user-selectable but is also a function of the sampling frequency, Fs,
and the DIGSFT (“Digital Soft Ramp” on page 46) setting unless the disable bit (“Limiter Soft Ramp Dis-
able” on page 66) is enabled.
6.28 Limiter Attack Rate (Address 23h)
7
Reserved
6
Reserved
5
LIMARATE5
4
LIMARATE4
3
LIMARATE3
2
LIMARATE2
1
LIMARATE1
0
LIMARATE0
6.28.1 Limiter Attack Rate
Sets the rate at which the limiter applies digital attenuation from levels above the MAX[2:0] threshold
(“Limiter Maximum Threshold” on page 60).
LIMARATE[5:0]
00 0000
···
11 1111
Application:
Attack Time
Fastest Attack
···
Slowest Attack
“Limiter” on page 32
Note: The limiter attack rate is user-selectable but is also a function of the sampling frequency, Fs, and
the DIGSFT (“Digital Soft Ramp” on page 46) setting unless the disable bit (“Limiter Soft Ramp Disable”
on page 66) is enabled.
6.29 ALC Enable & Attack Rate (Address 24h)
7
ALCB
6
ALCA
5
ALCARATE5
4
AALCRATE4
3
ALCARATE3
2
ALCARATE2
1
ALCARATE1
0
ALCARATE0
6.29.1 ALCx
Configures the automatic level controller (ALC).
ALC
0
1
Application:
ALC Status
Disabled
Enabled
“Automatic Level Control (ALC)” on page 24
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