CS43L43 datasheet(17/36 Pages) CIRRUS

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CS43L43

DS479PP3

5.2 CHANNEL A ANALOG ATTENUATION CONTROL (ADDRESS 02H) (VOLA)

5.3 CHANNEL B ANALOG ATTENUATION CONTROL (ADDRESS 03H) (VOLB)

Default = 0 dB (No attenuation)

Function:

The Analog Attenuation Control operates independently from the Digital Volume Control. The Analog At-

tenuation Control registers allow the user to attenuate the headphone output signal in 1 dB increments

from 0 to -25 dB, using the analog volume control. Attenuation settings are decoded as shown in Table 7,

using a 2’s complement code. The volume changes are implemented as dictated by the Soft and Zero

Cross bits in the Power and Muting Control register. All volume settings greater than zero are interpreted

as zero.

NOTE: When the Analog Headphone Attenuation Control registers are set for attenuation levels greater

than -10dB, the actual attenuation deviates from the register setting by more than 1dB.

654

VOLx7

VOLx6

VOLx5

VOLx4

VOLx3

VOLx2

VOLx1

VOLx0

000

Binary Code

Decimal Value

Volume Setting

00000000

0 dB

11110110

-10

-10 dB

11110001

-15

-15 dB

Table 7. Example Analog Volume Settings

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