STM32F479 datasheet(39/91 Pages) STMICROELECTRONICS

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AN4861

Creating a graphical application with LTDC

4.2.3

Check the compatibility of the display panel interface with the LTDC

The user should choose the LCD panel depending on the application needs. The two main

factors to consider when choosing the LCD panel are the resolution and the color depth.

These two factors have a direct impact on the following parameters:

•

The required GPIO number.

•

The framebuffer size and location.

•

The pixel clock of the display.

Table 12. Example of supported display resolutions in specific STM32 hardware

configurations

Display characteristics

STM32's LTDC configuration

Resolution

Refresh rate

(Hz)

Pixel clock

(MHz)

Display

standard

Color depth

SDRAM 16-bit SDRAM 32-bit

320 x 240

(QVGA)

5.6

Custom

Up to 32 bpp

480 x 272

9.5

640 x 480

(VGA)

25.175

Industry

standard

Up to 24 bpp

Up to 32 bpp

800 x 600

(SVGA)

40.000

VESA

guidelines(1)

1. VESA (video electronics standards association) is a technical standards organization for computer display

standards providing display monitor timing (DMT) standards.

Up to 16 bpp

Up to 24 bpp

1024 x 768

(XGA)

8 bpp

Up to 16 bpp

1280 x 768

68.250

CVT R.B(2)

2. CVT R.B: coordinated video timings reduced blanking standard by VESA.

1280 x 720

(HD)

74.25

CEA(3)

3. CEA = consumer electronics association.

Up to 16 bpp(4)

4. Up to 8 bpp for the STM32F4x9 microcontrollers

1920 x1080

74.25

CEA(3)

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