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LTDC maximum display resolution documentation inconsistency?

Question asked by evans.luke on Jan 10, 2018
Latest reply on Jan 10, 2018 by Jan Waclawek

Hi

AN4861 (en.DM00287603.pdf) page 25 states that the LTDC display peripheral can support total width up to 4096 pixels.

However, STM32F439 Reference (en.DM00031020.pdf) page 481 says "Supports up to XGA (1024x768) resolution."

Same for STM32F756 (en.DM00124865.pdf) page 505 - "Supports up to XGA (1024x768) resolution.".

 

Further, in the STM32F439 reference (above) page 494, in the description for the LTDC_AWCR register, it shows there are more bits available than the maximum values shown;

 - AAW 0x400(1024H) - 12 bits available should support up to 4096, and

 - AAH 0x300(768V) - 11 bits available should support up to 2048.

 

What's the story - are these parts actually limited?  Is there a nice reference showing actual capabilities of all LTDC MCU's?  Which should be taken as truth?

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