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STM32F427AI bảng dữ liệu(PDF) 23 Page - STMicroelectronics

tên linh kiện STM32F427AI
Giải thích chi tiết về linh kiện  32b Arm® Cortex®-M4 MCUFPU, 225DMIPS, up to 2MB Flash/2564KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 20 com. interfaces, camera & LCD-TFT
PDF  240 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F427AI bảng dữ liệu(HTML) 23 Page - STMicroelectronics

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DS9405 Rev 12
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STM32F427xx STM32F429xx
Functional overview
44
Figure 5. STM32F427xx and STM32F429xx Multi-AHB matrix
3.8
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.
ARM
Cortex-M4
GP
DMA1
GP
DMA2
MAC
Ethernet
USB OTG
HS
Bus matrix-S
ICODE
DCODE
Flash
memory
SRAM1
112 Kbyte
SRAM2
16 Kbyte
AHB2
peripherals
AHB1
peripherals
FMC external
MemCtl
MS30421V6
CCM data RAM
64-Kbyte
APB1
APB2
SRAM3
64 Kbyte
LCD-TFT
Chrom ART Accelerator
(DMA2D)



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