參數(shù)資料
型號(hào)： LM4935WLX
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(yè)數(shù)： 39/112頁(yè)
文件大?。?/td> 5017K
代理商： LM4935WLX
12.0 Status & Control Registers
(Continued)
12.18 SIDETONE ATTENUATION REGISTER
This register is used to control the analog sidetone attenuation. (Note 20)
TABLE 19. SIDETONE (0x0Dh)
Bits
3:0
Field
Description
SIDETONE_
ATTEN
Programs the attenuation applied to the microphone preamp output to produce a sidetone signal.
SIDETONE_ATTEN
0000
2
0001
2
0010
2
0011
2
0100
2
0101
2
to 1010
2
1011
2
to 1111
2
Attenuation
-Inf
30 dB
27 dB
24 dB
21 dB
18 dB to 3 dB
0 dB
Note 20:
An active SIDETONE path to an audio output may result in the microphone DC blocking caps causing audio pops under the following situations:
1) Switching between internal and external microphone operation while in chip modes ’10’ or ’11’.
2) Toggling in and out of powerdown/standby modes.
3) Toggling between chip modes ’10’ and ’11’ whenever external microphone operation is selected.
4) The insertion/removal of a headset while in chip modes ’10’ or ’11’ whenever external microphone operation is selected.
To avoid potential pop noises, it is recommended to set SIDETONE_ATTEN to ’0000’ until DC points have stabilized whenever the SIDETONE path is used.
L
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LM49360RLX 制造商:TI 制造商全稱:Texas Instruments 功能描述:Mono Class D Audio Codec PMU with Ground Referenced Headphone Amplifiers, Earpiece Driver, Audio DSP, 2 Step-Down DC-DC Converters, and 7 LDO Regulators
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