Cirrus Logic CS42L73 - Manual (Page 108)

108 DS882F1
CS42L73
6.33 Limiter Min/Max Thresholds Headphone/Line Output (HL) (Address 28h)
6.33.1 Limiter Maximum Threshold HL
Sets the maximum level, below full scale, above which, the Limiter will attack (increase attenuation) until
the output signal’s level is below this threshold.
6.33.2 Limiter Cushion Threshold HL
Sets the minimum level, below full scale, below which, the Limiter will release (remove attenuation) until
the output signal’s level is above this threshold.
Note: This setting is usually set slightly below the LMAXHL threshold.
6.34 Limiter Attack Rate Speakerphone [A] (Address 29h)
6.34.1 Limiter Attack Rate Speakerphone [A]
If limiter attack volume changes are configured to occur with a soft ramp, this register sets the soft-ramp
rate by specifying the soft-ramp step period size.
7 6 5 4 3 2 1 0
LMAXHL2 LMAXHL1 LMAXHL0 CUSHHL2 CUSHHL1 CUSHHL0 Reserved Reserved
LMAXHL[2:0] Threshold Setting
000 0 dB
001 -3 dB
010 -6 dB
011 -9 dB
100 -12 dB
101 -18 dB
110 -24 dB
111 -30 dB
CUSHHL[2:0] Threshold Setting
000 0 dB
001 -3 dB
010 -6 dB
011 -9 dB
100 -12 dB
101 -18 dB
110 -24 dB
111 -30 dB
7 6 5 4 3 2 1 0
Reserved Reserved LIMARATESPK5 LIMARATESPK4 LIMARATESPK3 LIMARATESPK2 LIMARATESPK1 LIMARATESPK0
LIMARATESPK[5:0] Step Period Size
00 0000
1 (Fastest Attack)
··· ···
11 1111 1008 (Slowest Attack)
Formula: Step Period Size = MAXIMUM_OF(1, 16 x LIMARATESPK)