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STW5095T bảng dữ liệu(PDF) 22 Page - STMicroelectronics

tên linh kiện STW5095T
Giải thích chi tiết về linh kiện  Low-power asynchronous stereo audio Codec with integrated power amplifiers
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STW5095T bảng dữ liệu(HTML) 22 Page - STMicroelectronics

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STw5095
Functional description
21/72
4.16
Headset plug-in and push-button detection
STw5095 can detect the plug-in of a microphone connector and the press/release event of a
call/answer push-button. An application example can be found below, while specifications
can be found in
Section 10.4 on page 56.
Figure 4.
Plug-in and push-button detection application note
4.17
Microphone biasing circuit
The Microphone Biasing Circuit 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.
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 circuit can be found in
Section 4.17 on page 21, and an application note is shown in
Section 18 on page 69.
Call/Answer Button
10
µF
1.5k
Ω
VCCA
3k
Ω
200nF
AUX1L
AUX1R
CAPMIC
HDET
200nF
STw5095
Generic Connector
From Driver



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