CS42L52 Datasheet, PDF (65/82 Pages) Cirrus Logic – Low Power, Stereo CODEC w/Headphone & Speaker Amps

6.29 Limiter Control 1, Min/Max Thresholds (Address 27h)
7
LMAX2
6
LMAX1
5
LMAX0
4
CUSH2
3
CUSH1
2
CUSH0
CS42L52
1
LIMSRDIS
0
LIMZCDIS
6.29.1 Limiter Maximum Threshold
Sets the maximum level, below full scale, at which to limit and attenuate the output signal at the attack
rate (LIMARATE - “Limiter Release Rate” on page 66).
LMAX[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 31
Note: Bass, Treble and digital gain settings that boost the signal beyond the maximum threshold may
trigger an attack.
6.29.2 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 66) 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 31
Note: This setting is usually set slightly below the LMAX threshold.
6.29.3 Limiter Soft Ramp Disable
Configures an override of the digital soft ramp setting.
LIMSRDIS
0
1
Application:
Limiter Soft Ramp Disable
OFF; Limiter Attack Rate is dictated by the DIGSFT (“Digital Soft Ramp” on page 53) setting
ON; Limiter volume changes take effect in one step, regardless of the DIGSFT setting.
“Limiter” on page 31
Note: This bit is ignored when the DIGZC (“Digital Zero Cross” on page 53) is enabled.
DS680A1
65