CS42L51(2005) View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS42L51
(Rev.:2005)

Low Power, Stereo CODEC with Headphone Amp

Cirrus Logic 

6.25 ALC Threshold (Address 1Eh)

7

MAX2

6

MAX1

5

MAX0

4

MIN2

Maximum Threshold (MAX[2:0])

Default: 000

MAX[2:0]

000

001

010

011

100

101

110

111

Threshold

Setting

(dB)

0

-3

-6

-9

-12

-18

-24

-30

3

MIN1

CS42L51

2

MIN0

1

Reserved

0

Reserved

Function:

Sets the maximum level, relative to full-scale, at which to limit and attenuate the input signal at the attack

rate.

Minimum Threshold (MIN[2:0])

Default: 000

MIN[2:0]

000

001

010

011

100

101

110

111

Threshold

Setting

(dB)

0

-3

-6

-9

-12

-18

-24

-30

Function:

Sets the minimum level at which to disengage the ALC’s attenuation or amplify the input signal at a rate set

in the release rate register until levels again reach this minimum threshold. The ALC uses this minimum as

a hysteresis point for the input signal as it maintains the signal below the maximum as well as below the

minimum setting. This provides a more natural sound as the ALC attacks and releases.

DS679A2

69

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