CS42L55 데이터 시트보기 (PDF) - Cirrus Logic

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CS42L55

Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

Cirrus Logic 

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.

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 32

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

6.27 Limiter Control, Release Rate (Address 22h)

7

LIMIT

6

LIMIT_ALL

5

LIMRRATE5

4

LIMRRATE4

3

LIMRRATE3

2

LIMRRATE2

1

LIMRRATE1

0

LIMRRATE0

6.27.1 Peak Detect and Limiter

Configures the peak detect and limiter circuitry.

LIMIT

0

1

Application:

Limiter Status

Disabled

Enabled

“Limiter” on page 32

6.27.2 Peak Signal Limit All Channels

Sets how channels are attenuated when the limiter is enabled.

LIMIT_ALL

0

1

Application:

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.

“Limiter” on page 32

DS773F1

61

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