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STM32L471RG bảng dữ liệu(PDF) 41 Page - STMicroelectronics

tên linh kiện STM32L471RG
Giải thích chi tiết về linh kiện  Batch acquisition mode
PDF  218 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STM32L471RG bảng dữ liệu(HTML) 41 Page - STMicroelectronics

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STM32L471xx
Functional overview
55
3.21
Digital filter for Sigma-Delta Modulators (DFSDM)
The device embeds one DFSDM with 4 digital filters modules and 8 external input serial
channels (transceivers) or alternately 8 internal parallel inputs support.
The DFSDM peripheral is dedicated to interface the external Σ∆ modulators to
microcontroller and then to perform digital filtering of the received data streams (which
represent analog value on Σ∆ modulators inputs). DFSDM can also interface PDM (Pulse
Density Modulation) microphones and perform PDM to PCM conversion and filtering in
hardware. DFSDM features optional parallel data stream inputs from microcontrollers
memory (through DMA/CPU transfers into DFSDM).
DFSDM transceivers support several serial interface formats (to support various Σ∆
modulators). DFSDM digital filter modules perform digital processing according user
selected filter parameters with up to 24-bit final ADC resolution.



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