CS43L43 데이터 시트보기 (PDF) - Cirrus Logic

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CS43L43

Low Voltage, Stereo DAC with Headphone Amp

Cirrus Logic 

CS43L43

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

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

7

VOLx7

0

6

VOLx6

0

5

VOLx5

0

4

VOLx4

0

3

VOLx3

0

2

VOLx2

0

1

VOLx1

0

0

VOLx0

0

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.

Binary Code

00000000

11110110

11110001

Decimal Value

0

-10

-15

Volume Setting

0 dB

-10 dB

-15 dB

Table 7. Example Analog Volume Settings

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.

DS479PP3

17

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