CS42L52 Datasheet, PDF (67/82 Pages) Cirrus Logic – Low Power, Stereo CODEC w/Headphone & Speaker Amps

CS42L52
6.31 Limiter Attack Rate (Address 29h)
7
Reserved
6
Reserved
5
4
LIMARATE5 LIMARATE4
3
LIMARATE3
2
LIMARATE2
1
LIMARATE1
0
LIMARATE0
6.31.1 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 65).
LIMARATE[5:0]
00 0000
···
11 1111
Application:
Attack Time
Fastest Attack
···
Slowest Attack
“Limiter” on page 31
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 53) and DIGZC (“Digital Zero Cross” on page 53) setting unless
the respective disable bit (“Limiter Soft Ramp Disable” on page 65 or “Limiter Zero Cross Disable” on
page 66) is enabled.
6.32 ALC Enable & Attack Rate (Address 2Ah)
7
ALCB
6
ALCA
5
4
3
2
1
0
ALCARATE5 AALCRATE4 ALCARATE3 ALCARATE2 ALCARATE1 ALCARATE0
6.32.1 ALCx Enable
Configures the automatic level controller.
ALC
0
1
Application:
ALC Status
Disabled
Enabled
“Automatic Level Control (ALC)” on page 27
6.32.2 ALC Attack Rate
Sets the rate at which the ALC applies analog and/or digital attenuation from levels above the AMAX[2:0]
threshold (“ALC Maximum Threshold” on page 68).
LIMARATE[5:0]
00 0000
···
11 1111
Application:
Attack Time
Fastest Attack
···
Slowest Attack
“Automatic Level Control (ALC)” on page 27
Note: The ALC attack rate is user-selectable but is also a function of the sampling frequency, Fs, and
the ANLGSFTx (“Ch. x Analog Soft Ramp” on page 49) and ANLGZCx (“Ch. x Analog Zero Cross” on
page 49) setting unless the respective disable bit (“ALCx Soft Ramp Disable” on page 55 or “ALCx Zero
Cross Disable” on page 55) is enabled.
DS680A1
67