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AS3435 Folha de dados(PDF) 47 Page - ams AG

Nome de Peças AS3435
Descrição Electrónicos  Integrated Active Noise Cancelling Solution with Bypass Feature
PDF  102 Pages
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Fabricante Electrônico  AMSCO [ams AG]
Página de início  http://www.ams.com
Logo AMSCO - ams AG

AS3435 Folha de dados(HTML) 47 Page - ams AG

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ams Datasheet, Confidential: 2014-Jun-13 [v1-30]
AS3415/AS3435 – 47
Detaile d Desc rip t ion
Playback Only Mode
The active noise cancelling feature of the AS3415/35 can also
be disabled with the ANC/CSDA pin. The ANC/CSDA pin has to
be pulled high to enable the ANC function during startup (ANC
MODE). If the pin is connected to ground, the chip enters
playback only mode (PBO MODE) in which the ANC function is
disabled. The operating mode of the line input mute switch, as
well as the mixer input, can be defined in register PBO_MODE.
The microphone amplifier shuts down automatically, but it is
possible to control the operational amplifiers in this mode
separately. Typically only the line input amplifiers and the
headphone amplifier are enabled in the playback only mode.
This very special mode allows the user to disable the ANC
function but still use the line input equalizer function of the
chipset. If this function is not desired you just need to pull the
pin high through a 22kΩ resistor.
Figure 60:
Playback Only Mode Timing Diagram
Playback Only Mode Timing Diagram: The diagram shows the necessary voltages and timings for different
operation modes in Playback Only Mode.



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