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AN4031 Datasheet(PDF) 22 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) 22 Page - STMicroelectronics

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System performance considerations
AN4031
22/36
DocID022648 Rev 1
Figure 11. DMA dual port
For DMA2:
•
The MEM (memory port) can access AHB1, AHB2, SRAM1, SRAM2, FSMC and Flash
memory D-code through the bus matrix.
•
The Periph (peripheral port) can access:
–
AHB1, AHB2, SRAM1, SRAM2, FSMC and Flash memory D-code through the bus
matrix,
–
the AHB-to-APB2 bridge through a direct path (not crossing the bus matrix).
For DMA1:
•
The MEM (memory port) can access SRAM1, SRAM2, FSMC, Flash memory D-code
through the bus matrix.
•
The Periph (peripheral port) can only access the AHB-to-APB1 bridge through a direct
path (not crossing the bus matrix).



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