STM32H7B3 GFX Resolution Supports and Frame Buffer Calculation:

[Karan 123]

Hello,

STM32H7B3xI is coming with approx . 1.4MB Internal RAM .

What max TFT resolution it will supports with Internal Frame Buffer (Single Buffer)

only with single MCU?

Frame Buffer = Number of Pixels x ( Color Depth in Bits / 8 ) 

Frame Buffer = 800 x 480 x ( 16/ 8 ) 

Frame Buffer = 768000 Bytes

Frame Buffer = 750 KBytes

--

Karan

[Martin KJELDSEN]

Theoretically, you can do the calculations, but you also need to consider the complexity of the application vs the "Max Resolution".

[Karan 123]

Thanks..

​​Ok..

My Application has Scroll Lists, Text Areas, Buttons with Multiple Screens.. No Video No Heavy Graphics and No Animations Required. Just for Industrial HMIs.

1) How to Distinguish RAM from

Fram Buffer and Rest of RAM for application part.

2)​ Is there any Eval/Development that have 7 inch TFT 800 x 480 ResolutionResolution with RGB Interface?

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Karan​

[Karan 123]

Hi,

@Martin KJELDSEN  (ST Employee)

Few days back , I have attended webinar "Explore Graphics, Artificial Intelligence, and Voice UI Applications with the STM32H7A3/B3" .

How 1.4MB RAM is segregated ?

Can you please help me understand below image ?

Why only 510 Frame Buffer in used for Frame Buffer ?

--

Karan

[Martin KJELDSEN]

Hi, i'm confused by your arrow and your comment on 510 Kb ram. But, if we do the math for the 510 case (480x272, 32 bpp)

( 480 x 272 x 4 ) / 1024 = 510 KB - You could fit two of those in internal RAM with memory left to spare

[Karan 123]

Hi,

@Martin KJELDSEN  (ST Employee)

Frame Buffer = 800 x 480 x ( 16/ 8 )  = 750

But , Why I can't access 750 KB RAM (From Internal RAM) as per slide image of 1.4 MB RAM ?

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Karan