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STM32F469 데이터시트(PDF) 55 Page - STMicroelectronics

부품명 STM32F469
상세설명  LCD-TFT display controller (LTDC) on STM32 MCUs
PDF  91 Pages
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AN4861
Creating a graphical application with LTDC
89
An example of LTDC configuration using STM32CubeMX is described in Section 6.2.4:
LTDC peripheral configuration.
Pixel clock and timings configuration
At this stage of the graphical application development, the user should have already
checked and confirmed that the desired display size and color depth are compatible with the
hardware configuration. Therefore, the pixel clock to be configured should be already
known, either extracted from display datasheet or calculated (see Section 4.2.2: Checking
display compatibility considering the memory bandwidth requirements).
Example: LTDC timings configuration for ROCKTECH RK043FN48H display
embedded on the STM32F746G-DISCO board
At first, the user should extract the timing parameters from the display’s datasheet (see
Table 14). It is recommended to use typical display timings.
Table 14. LCD-TFT timings extracted from ROCKTECH RK043FN48H datasheet (1)
1. The gray cells highlight the values used in the example presented below.
Item
Symbol
Min.
Typ.
Max.
Unit
DCLK frequency
Fclk
5
9
12
MHz
DCLK period
Tclk
83
110
200
ns
Hsync
Period time
Th
490
531
605
DCLK
Display period
Thdisp
-
480
-
DCLK
Back porch
Thbp
8
43
-
DCLK
Front porch
Thfp
2
8
-
DCLK
Pulse width
Thw
1
-
-
DCLK
Vsync
Period time
Tv
275
288
335
H
Display period
Tvdisp
-
272
-
H
Back porch
Tvbp
2
12
-
H
Front porch
Tvfp
1
4-
H
Pulse width
Tvw
1
10
-
H



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