CS42L56 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
CS42L56 Datasheet PDF : 92 Pages
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CS42L56
6.32.3 Noise Gate Threshold and Boost
THRESH sets the threshold level of the noise gate. Input signals below the threshold level will be attenu-
ated to -96 dB. NG_BOOST configures a +30 dB boost to the threshold settings.
THRESH[2:0]
000
001
010
011
100
101
110
111
Minimum Setting (NG_BOOST = 0b)
-64 dB
-67 dB
-70 dB
-73 dB
-76 dB
-82 dB
Reserved
Reserved
Minimum Setting (NG_BOOST = 1b)
-34 dB
-36 dB
-40 dB
-43 dB
-46 dB
-52 dB
-58 dB
-64 dB
6.32.4 Noise Gate Delay Timing
Sets the delay time before the noise gate attacks.
NGDELAY[1:0]
00
01
10
11
Delay Setting
50 ms
100 ms
150 ms
200 ms
Note: The Noise Gate attack rate is a function of the sampling frequency, Fs, and the DIGSFT (“Digital
Soft Ramp” on page 64) setting.
6.33 ALC and Limiter Soft Ramp, Zero Cross Disables (Address 26h)
7
ALCASRDIS
6
ALCAZCDIS
5
ALCBSRDIS
4
ALCBZCDIS
3
LIMSRDIS
2
Reserved
1
Reserved
6.33.1 ALCx Soft Ramp Disable
Configures an override of the analog soft ramp setting.
ALCxSRDIS
0
1
ALC Soft Ramp Disable
OFF; ALC Attack Rate is dictated by the DIGSFT (“Digital Soft Ramp” on page 64) setting
ON; ALC volume changes take effect in one step, regardless of the DIGSFT setting.
0
Reserved
6.33.2 ALCx Zero Cross Disable
Configures an override of the analog zero cross setting.
ALCxZCDIS
0
1
ALC Zero Cross Disable
OFF; ALC Attack Rate is dictated by the ANLGZC (“Analog Zero Cross” on page 64) setting
ON; ALC volume changes take effect at any time, regardless of the ANLGZC setting.
6.33.3 Limiter Soft Ramp Disable
Configures an override of the digital soft ramp setting.
LIMSRDIS
0
1
Limiter Soft Ramp Disable
OFF; Limiter Attack Rate is dictated by the DIGSFT (“Digital Soft Ramp” on page 64) setting
ON; Limiter volume changes take effect in one step, regardless of the DIGSFT setting.
DS851F2
81
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