STW5098_07 datasheet(28/86 Pages) STMICROELECTRONICS

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STW5098 датащи(PDF) 28 Page - STMicroelectronics

номер детали	STW5098

подробное описание детали	Dual low power asynchronous stereo audio Codec with integrated power amplifiers

PDF	86 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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28 / 86 page

STw5098

Functional description

27/85

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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