lm4935rlx National Semiconductor Corporation, lm4935rlx Datasheet - Page 63
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lm4935rlx
Manufacturer Part Number
lm4935rlx
Description
Audio Sub-system With Dual-mode Stereo Headphone And Mono High Efficiency Loudspeaker Amplifiers And Multi-purpose Adc
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM4935RLX.pdf
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12.0 Status & Control Registers
12.38 DC VOLUME CONFIGURATION REGISTER
This register is used to control the DC volume control system.
Note 32: The correlation between the voltage on VSAR1 to the attenuation on the AUX/DAC channel is as follows:
Bits
3:2
0
1
DC_VOL_EFFECT
DC_VOL_ENB
MAX_LEVEL
Field
FIGURE 16. DC Volume Transfer Function For AUX/DAC
TABLE 39. DC_VOLUME (0x21h)
Enables the DC volume control system to use the voltage applied on the
VSAR 1 pin to set the gain of the DC volume control. (Note 32)
Selects which volume is altered:
Programs the maximum level that can be applied by the system
(Continued)
DC_VOL_EFFECT
MAX_LEVEL
63
00
01
10
11
0
1
2
2
2
2
201341P4
Description
AUX/DAC
Source
−12 dB
LEVEL
−3 dB
−6 dB
0 dB
CPI
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