Cirrus-logic CS42L55 Manuale Utente Scaricare il pdf (Pagina 61)

DS773F1 61

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.

Note: This setting is usually set slightly below the LMAX threshold.

6.27 Limiter Control, Release Rate (Address 22h)

6.27.1 Peak Detect and Limiter

Configures the peak detect and limiter circuitry.

6.27.2 Peak Signal Limit All Channels

Sets how channels are attenuated when the limiter is enabled.

CUSH[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

Application: “Limiter” on page 32

76543210

LIMIT LIMIT_ALL LIMRRATE5 LIMRRATE4 LIMRRATE3 LIMRRATE2 LIMRRATE1 LIMRRATE0

LIMIT Limiter Status

0 Disabled

1 Enabled

Application: “Limiter” on page 32

LIMIT_ALL 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.

Application: “Limiter” on page 32

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Cirrus-logic CS42L55 Manuale Utente Pagina 61