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STA321MPL1 датащи(PDF) 14 Page - STMicroelectronics

номер детали STA321MPL1
подробное описание детали  Scalable digital microphone processor
PDF  80 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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STA321MPL1 датащи(HTML) 14 Page - STMicroelectronics

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Microphone interface
STA321MPL1
14/80
DocID029389 Rev 1
Figure 4. PDM clock generator
3.2
PDM resampling interface
The PDM resampling interface is used to properly sample external data.
It can work in three different modes: compatibility mode, dual-membrane mode and
advanced mode. In each mode, data are sampled at the rising or falling edge.
Table 8. Modes for PDM resampling interface
Compatibility mode
In this mode every channel is sampled at the rising edge.
Dual-membrane mode
The dual-membrane mode is a particular configuration (automatically applied when the
proper bit is asserted) which permits the use of the dual-membrane microphone. In
particular, it has 2 PDM data channels (normal and high) muxed in a single wire. The normal
channel is sampled at the falling edge, while the high channel is sampled at the rising edge.
Advanced mode
In this mode every channel can be sampled at the rising or falling edge according to the
configuration register.
Mode
Behavior
00
Compatibility (old)
01
Reserved
10
Dual-membrane
11
Advanced



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