CS43L22 datasheet(53/66 Pages) CIRRUS

53 / 66 page

DS792F2

CS43L22

Confidential Draft

3/4/10

7.23

Limiter Control 1, Min/Max Thresholds (Address 27h)

7.23.1

Limiter Maximum Threshold

Sets the maximum level, below full scale, at which to limit and attenuate the output signal at the attack

rate (LIMARATE - “Limiter Release Rate” on page 54).

Note:

Bass, Treble and digital gain settings that boost the signal beyond the maximum threshold may

trigger an attack.

7.23.2

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 54) until levels lie between the LMAX and CUSH thresholds.

Note:

This setting is usually set slightly below the LMAX threshold.

7.23.3

Limiter Soft Ramp Disable

Configures an override of the digital soft ramp setting.

Note:

This bit is ignored when the DIGZC (“Digital Zero Cross” on page 45) is enabled.

432

LMAX2

LMAX1

LMAX0

CUSH2

CUSH1

CUSH0

LIMSRDIS

LIMZCDIS

LMAX[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 22

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 22

LIMSRDIS

Limiter Soft Ramp Disable

OFF; Limiter Attack Rate is dictated by the DIGSFT (“Digital Soft Ramp” on page 44) setting

ON; Limiter volume changes take effect in one step, regardless of the DIGSFT setting.

Application:

“Limiter” on page 22

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