CS42L51 Datasheet, PDF (65/83 Pages) Cirrus Logic – Low Power, Stereo CODEC with Headphone Amp

CS42L51
6.20 Limiter Threshold SZC Disable (Address 19h)
7
MAX2
6
MAX1
5
MAX0
4
CUSH2
3
CUSH1
2
CUSH0
1
0
LIM_SRDIS LIM_ZCDIS
NOTE: The DATA_SEL[1:0] bits in reg09h must be set to ‘01’b to enable function control in this register.
Maximum Threshold (MAX[2:0])
Default: 000
MAX[2:0]
000
001
010
011
101
101
110
111
Threshold
Setting
(dB)
0
-3
-6
-9
-12
-18
-24
-30
Function:
Sets the maximum level, below fullscale, at which to limit and attenuate the output signal at the attack rate.
Bass, Treble and digital gain settings that boost the signal beyond the maximum threshold may trigger an
attack.
Cushion Threshold (CUSH[2:0])
Default: 000
CUSH[2:0] Threshold
Setting
(dB)
000
0
001
-3
010
-6
011
-9
101
-12
101
-18
110
-24
111
-30
Function:
Sets a cushion level below fullscale. This setting is usually set slightly below the maximum (MAX[2:0])
threshold. The Limiter uses this cushion as a hysteresis point for the input signal as it maintains the signal
below the maximum as well as below the cushion setting. This provides a more natural sound as the limiter
attacks and releases.
DS679A2
65