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AN4031 Datasheet(PDF) 34 Page - STMicroelectronics

Part # AN4031
Description  Using the STM32F2 and STM32F4 DMA controller
PDF  36 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4031 Datasheet(HTML) 34 Page - STMicroelectronics

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Conclusion
AN4031
34/36
DocID022648 Rev 1
5
Conclusion
The STM32F2/F4 DMA controller is designed to cover most of the embedded use case
applications by:
•
Giving flexibility to firmware to choose the suitable combination between 16 streams X
16 channels (eight for each DMA),
•
Reducing the total latency time for a DMA transfer, thanks to dual AHB port
architecture, and direct path to APB bridges avoiding CPU stall on AHB1 access when
DMA is servicing low-speed APB peripherals,
•
FIFOs implementation on DMA allows more flexibility to firmware to configure different
data sizes between source and destination, and speeds-up transfers when using
incremental burst transfer mode.



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