Hardware Manual: emSTAMP- emSBC-Argon (Rev1)
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5.7.2
LCD-TFT display controller (LTDC)
The LCD-TFT display controller (LTDC) of the STM32MP157 provides a parallel RGB interface with
up to 24-bit color (RGB-888). This interface supports a wide range of LCD- and TFT-panels with up
to WXGA (1366 x 768) @ 60 fps. As control signals it provides V-Sync, H-Sync, pixel clock and data
enable. The LTDC has two display layers each with 64 x 64-bit FIFO.
The following table shows the LTDC color output in RGB-888, RGB-666 and RGB-565 format. If less
than 8-bit per color are used (RGB-666 and RGB-565), the RGB data lines of the LCD panel must be
connected to the MSB of the LTDCs RGB data lines.
LTDC on
module
LCD RGB-888
LCD RGB-666
LCD RGB-565
LTDC_B0
LCD-B0
LTDC_B1
LCD-B1
LTDC_B2
LCD-B2
LCD-B0
LTDC_B3
LCD-B3
LCD-B1
LCD-B0
LTDC_B4
LCD-B4
LCD-B2
LCD-B1
LTDC_B5
LCD-B5
LCD-B3
LCD-B2
LTDC_B6
LCD-B6
LCD-B4
LCD-B3
LTDC_B7
LCD-B7
LCD-B5
LCD-B4
LTDC_G0
LCD-G0
LTDC_G1
LCD-G1
LTDC_G2
LCD-G2
LCD-G0
LCD-G0
LTDC_G3
LCD-G3
LCD-G1
LCD-G1
LTDC_G4
LCD-G4
LCD-G2
LCD-G2
LTDC_G5
LCD-G5
LCD-G3
LCD-G3
LTDC_G6
LCD-G6
LCD-G4
LCD-G4
LTDC_G7
LCD-G7
LCD-G5
LCD-G5
LTDC_R0
LCD-R0
LTDC_R1
LCD-R1
LTDC_R2
LCD-R2
LCD-R0
LTDC_R3
LCD-R3
LCD-R1
LCD-R0
LTDC_R4
LCD-R4
LCD-R2
LCD-R1
LTDC_R5
LCD-R5
LCD-R3
LCD-R2
LTDC_R6
LCD-R6
LCD-R4
LCD-R3
LTDC_R7
LCD-R7
LCD-R5
LCD-R4
The following table shows the available signals of the parallel 24-bit RGB interface. The pinout of
the pins can be found in the chapter “Castellation Connector”.
Signal
Description
LTDC_R[7..0]
8-bit red color data
LTDC_G[7..0]
8-bit green color data
LTDC_B[7..0]
8-bit blue color data
LTDC_HSYNC
horizontal sync signal
LTDC_VSYNC
vertical sync signal
LTDC_CLK
Pixel clock
LTDC_DE
Data enable
