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
Decimal Value
Volume Setting
0 dB
0
-10
-15
-10 dB
-15 dB
11110001
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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