Instruction Manual

DS773F1 63
CS42L55
6.29.2 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 64).
Note: The ALC attack rate is user-selectable but is also a function of the sampling frequency, Fs, the
ANLGZCx (“Analog Zero Cross” on page 46) and the DIGSFT (“Digital Soft Ramp” on page 46) setting
unless the respective disable bit (“ALCx Soft Ramp Disable” on page 65 or “ALCx Zero Cross Disable” on
page 65) is enabled.
6.30 ALC Release Rate (Address 25h)
6.30.1 ALC Release Rate
Sets the rate at which the ALC releases the analog and/or digital attenuation from levels below the
MIN[2:0] threshold (“Limiter Cushion Threshold” on page 61) and returns the signal level to the PGAx-
VOL[5:0] (“PGAx Volume” on page 49) and ADCxVOL[7:0] (“ADCx Volume” on page 50) setting.
Notes:
1. The ALC release rate is user-selectable but is also a function of the sampling frequency, Fs, and the
DIGSFT (“Digital Soft Ramp” on page 46) and ANLGZCx (“Analog Zero Cross” on page 46) setting.
2. The Release Rate setting must always be slower than the Attack Rate.
ALCARATE[5:0] Attack Time
00 0000 Fastest Attack
··· ···
11 1111 Slowest Attack
Application: “Automatic Level Control (ALC)” on page 24
76543210
Reserved Reserved ALCRRATE5 ALCRRATE4 ALCRRATE3 ALCRRATE2 ALCRRATE1 ALCRRATE0
ALCRRATE[5:0] Release Time
00 0000 Fastest Release
··· ···
11 1111 Slowest Release
Application: “Automatic Level Control (ALC)” on page 24