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Asantos
Asantos
Associate III
February 10, 2017
Question

LTDC using internal SRAM, How much SRAM?

  • February 10, 2017
  • 1 reply
  • 484 views
Posted on February 10, 2017 at 21:40

Hi,

 I would like to use a 320x240 TFT RGB interface display using the STM32F767ZI internal SRAM. But I can't figure out what is the minimum SRAM required for the frame buffer. For 16 bits RGB565 would be 320x240x2 = 153600 bytes?  

 Ari.

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    1 reply

    T J
    T J
    Senior III
    February 10, 2017
    Posted on February 10, 2017 at 22:10

    Yes, I believe that is correct...

    320x240 TFT with 16bit RGB565 would be 320x240x2 = 153,600 bytes

    the next question is how much CPU horsepower is used to refresh the display continuously ?

    does the processor temperature rise significantly running an LCD ?

    are you using A/Ds ?  I wonder how the analog converters drift when the processor is under load..

    This is why most solutions are using the SPI port but it suffers 1000x slower update

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