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): 38/112頁
文件大?。?/td> 5017K
代理商: WLA49VVA
12.0 Status & Control Registers (Continued)
12.10 ADC_1 CONFIGURATION REGISTER
This register is used to control the LM4935’s audio ADC.
TABLE 11. ADC_1 (0x06h)
Bits
Field
Description
0
MIC_SELECT
If set the microphone preamp output is added to the ADC input signal.
1
CPI_SELECT
If set the cell phone input is added to the ADC input signal.
2
LEFT_SELECT
If set the left stereo bus is added to the ADC input signal.
3
RIGHT_SELECT
If set the right stereo bus is added to the ADC input signal.
5:4
ADC_SAMPLE_
RATE
Programs the closest expected sample rate of the mono ADC, which is a variable required by the
AGC algorithm whenever the AGC is in use. This does not set the sample rate of the mono ADC.
ADC_SAMPLE_RATE
Sample Rate
00
2
8 kHz
01
2
12 kHz
10
2
16 kHz
11
2
24 kHz
7:6
HPF_MODE
Sets the HPF of the ADC
HPF-MODE
HPF Response
00
2
No HPF
01
2
F
S = 8 kHz, 0.5 dB @ 300 Hz, Notch @ 55 Hz
F
S = 12 kHz, 0.5 dB @ 450 Hz, Notch @ 82 Hz
F
S = 16 kHz, 0.5 dB @ 600 Hz, Notch @ 110 Hz
10
2
F
S = 8 kHz, 0.5 dB @ 150 Hz, Notch @ 27 Hz
F
S = 12 kHz, 0.5 dB @ 225 Hz, Notch @ 41 Hz
F
S = 16 kHz, 0.5 dB @ 300 Hz, Notch @ 55 Hz
11
2
No HPF
LM4935
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