參數(shù)資料
型號: WLA49VVA
廠商: National Semiconductor Corporation
元件分類: ADC
英文描述: Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
中文描述: 音頻子系統(tǒng)的雙模單聲道立體聲耳機(jī)和揚(yáng)聲器放大器的高效率和多功能模數(shù)轉(zhuǎn)換器
文件頁數(shù): 72/112頁
文件大?。?/td> 5017K
代理商: WLA49VVA
12.0 Status & Control Registers (Continued)
12.38 DC VOLUME CONFIGURATION REGISTER
This register is used to control the DC volume control system.
TABLE 39. DC_VOLUME (0x21h)
Bits
Field
Description
0
DC_VOL_ENB
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)
1
DC_VOL_EFFECT
Selects which volume is altered:
DC_VOL_EFFECT
Source
0
AUX/DAC
1
CPI
3:2
MAX_LEVEL
Programs the maximum level that can be applied by the system
MAX_LEVEL
LEVEL
00
2
0dB
01
2
3 dB
10
2
6 dB
11
2
12 dB
Note 32: The correlation between the voltage on VSAR1 to the attenuation on the AUX/DAC channel is as follows:
201341P4
FIGURE 16. DC Volume Transfer Function For AUX/DAC
LM4935
www.national.com
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