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STM32F405OE Datasheet(PDF) 21 Page - STMicroelectronics

Part No. STM32F405OE
Description  ARM Cortex-M4 32b MCUFPU, 210DMIPS, up to 1MB Flash/1924KB RAM, USB OTG HS/FS
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F405OE Datasheet(HTML) 21 Page - STMicroelectronics

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STM32F405xx, STM32F407xx
Description
Figure 6. Multi-AHB matrix
2.2.8
DMA controller (DMA)
The devices feature two general-purpose dual-port DMAs (DMA1 and DMA2) with 8
streams each. They are able to manage memory-to-memory, peripheral-to-memory and
memory-to-peripheral transfers. They feature dedicated FIFOs for APB/AHB peripherals,
support burst transfer and are designed to provide the maximum peripheral bandwidth
(AHB/APB).
The two DMA controllers support circular buffer management, so that no specific code is
needed when the controller reaches the end of the buffer. The two DMA controllers also
have a double buffering feature, which automates the use and switching of two memory
buffers without requiring any special code.
Each stream is connected to dedicated hardware DMA requests, with support for software
trigger on each stream. Configuration is made by software and transfer sizes between
source and destination are independent.
The DMA can be used with the main peripherals:
SPI and I2S
I2C
USART
General-purpose, basic and advanced-control timers TIMx
DAC
SDIO
Camera interface (DCMI)
ADC.
ARM
Cortex-M4
GP
DMA1
GP
DMA2
MAC
Ethernet
USB OTG
HS
Bus matrix-S
S0
S1
S2
S3
S4
S5
S6
S7
ICODE
DCODE
Flash
memory
SRAM1
112 Kbyte
SRAM2
16 Kbyte
AHB1
peripherals
AHB2
FSMC
Static MemCtl
M0
M1
M2
M3
M4
M5
M6
ai18490c
CCM data RAM
64-Kbyte
APB1
APB2
peripherals


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