STM32F469 datasheet(19/91 Pages) STMICROELECTRONICS

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Overview of LTDC controller and STM32 MCUs graphical portfolio

2.4

Advantages of using an STM32 LTDC controller

Table 4 summarizes the major advantages of using the STM32’s embedded LTDC interface.

Table 4. Advantages of using STM32 MCUs LTDC controller

Advantage

Comments

Cost savings

Compared to other DBI interfaces (SPI, Motorola 6800 or

Intel 8080), the LTDC allows a connection to any low-cost

display module with no display controller nor GRAM.

The CPU is offloaded

The LTDC is an AHB master with its own DMA, which

fetches data autonomously from any AHB memory without

any CPU intervention.

No need for extra applicative layer

The LTDC hardware fully manages the data fetching, the

RGB outputting and the signals control, so no need for

extra applicative layer.

Fully programmable resolution

supporting custom and standard

displays

Fully programmable resolution with total width of up to

4096 pixels and total height of up to 2048 lines and with

pixel clock of up to 83 MHz.

Support of custom and standard resolutions (QVGA, VGA,

SVGA, WVGA, XGA, HD, and others).

Flexible color format

Each LTDC layer can be configured to fetch the

framebuffer in the desired pixel format (seeSection 3.3.2:

Programmable layer: color framebuffer).

Flexible parallel RGB interface

The flexible parallel RGB interface allows to drive 16-bit,

18-bit and 24-bit displays.

Ideal for low power and mobile

applications such as smartwatches.

The LTDC is able to continue graphic data fetching and

display driving while the CPU is in SLEEP mode.

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