2024-07-01 08:14 AM
Hello,
I read the AN4861 and try to determine the max LCD resolution for a STM32U5F without using external RAM. The lowest color is 16 bit, RGB656.
I would like to use 1366*768, which should be 1049088 pixel, this should approx 1.9MB for the framebuffer.
Would this work ?
2024-07-01 08:20 AM - edited 2024-07-01 08:22 AM
Bandwidth should be fine, DSI 2-Lane was one of the constraints to 1.1 - 1.2 Mpixel ceiling
Generally you'd prefer to have two frame buffers so there's less disruption / tearing due to you painting into an active buffer
62.5 MHz -> 1366x768 at 60 Hz
Frame buffer a little over 2MB
2024-07-02 07:03 AM
thanks for the fast answer.
I thought the bandwith should be fine, but i would like to use LTDC with a RGB interface and not DSI. which should work too, or ?
For me would 50Hz be fine too.
The STM32U5F has 3MB RAM, which should be ok, if i get the datasheet right the LTDC can work with different RAM banks as the larger banks are only 800kB.