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STW5098 数据表(PDF) 28 Page - STMicroelectronics

部件名 STW5098
功能描述  Dual low power asynchronous stereo audio Codec with integrated power amplifiers
PDF  86 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STW5098 数据表(HTML) 28 Page - STMicroelectronics

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4.18
Microphone biasing circuits
The Microphone Biasing Circuits can drive mono or stereo microphones and can switch
them off when not needed in order to save the current used by the microphone biasing
network on each entity. Two bits control the behavior of the microphone bias circuit: MBIAS
in CR17 enables the circuit (fixed voltage at MBIAS pin), while bit MBIASPD in CR17 affects
the behavior of MBIAS pin when the function is not enabled. In particular when MBIASPD=1
the MBIAS pin is pulled down, otherwise it is left in tristate mode. The specification for the
microphone biasing circuits can be found in
Section 10.6 on page 64.



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