CS42L55 Datasheet, PDF (61/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

CS42L55
6.26.2 Limiter Cushion Threshold
Sets the minimum level at which to disengage the Limiter’s attenuation at the release rate (LIMRRATE -
“Limiter Release Rate” on page 62) until levels lie between the LMAX and CUSH thresholds.
CUSH[2:0]
000
001
010
011
100
101
110
111
Application:
Threshold Setting
0 dB
-3 dB
-6 dB
-9 dB
-12 dB
-18 dB
-24 dB
-30 dB
“Limiter” on page 32
Note: This setting is usually set slightly below the LMAX threshold.
6.27 Limiter Control, Release Rate (Address 22h)
7
LIMIT
6
LIMIT_ALL
5
LIMRRATE5
4
LIMRRATE4
3
LIMRRATE3
2
LIMRRATE2
1
LIMRRATE1
0
LIMRRATE0
6.27.1 Peak Detect and Limiter
Configures the peak detect and limiter circuitry.
LIMIT
0
1
Application:
Limiter Status
Disabled
Enabled
“Limiter” on page 32
6.27.2 Peak Signal Limit All Channels
Sets how channels are attenuated when the limiter is enabled.
LIMIT_ALL
0
1
Application:
Limiter action:
Apply the necessary attenuation on a specific channel only when the signal amplitudes on that specific chan-
nel rises above LMAX.
Remove attenuation on a specific channel only when the signal amplitude on that specific channel falls below
CUSH.
Apply the necessary attenuation on BOTH channels when the signal amplitudes on any ONE channel rises
above LMAX.
Remove attenuation on BOTH channels only when the signal amplitude on BOTH channels fall below CUSH.
“Limiter” on page 32
DS773F1
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