LTDC using internal SRAM, How much SRAM?

Asantos · ‎2017-02-10

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.

T J · ‎2017-02-10

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