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Giải thích chi tiết về linh kiện  LCD-TFT display controller (LTDC) on STM32 MCUs
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AN4861
Creating a graphical application with LTDC
89
4.4
LTDC synchronization with DMA2D and CPU
4.4.1
DMA2D usage
The DMA2D is a master on the AHB bus matrix performing graphical data transfers inter-
memories. It is recommended to use the DMA2D in order to offload the CPU.
The DMA2D implements four basic tasks:
•
Fill a rectangular shape with a unique color.
•
Copy a frame or a rectangular part of a frame from a memory to another.
•
Convert the pixel format of a frame or a rectangular part of a frame while transferring it
from one memory to another memory.
•
Blend two images with different sizes and pixel format and store the resulting image in
one resulting memory.
STM32F7x8(2)
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
24
STM32F7x9(2)
NA
NA
NA
NA
NA
24
24
24
NA
NA
24
1. Gray cells with “NA” = the package is not available for that specific product.
Cells with “18” value = only RGB565 and RGB666 parallel outputs are supported.
Cells with “24” value = all of RGB565, RGB666 and RGB888 outputs are supported.
2. The integrated MIPI-DSI controller allows easier PCB design with fewer pins, for more details on STM32's
MIPI-DSI host refer to application note AN4860.
Table 13. STM32 packages with LTDC peripheral versus
RGB interface availability(1) (continued)
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