Can we use a display with 1900x1200 resolution with STM32H743.

[Marat Yevtukhov]

Posted on February 21, 2018 at 07:14

We would like to use STM32H743 and 1900x1200 display. From the RM we see that LTDC Active Width Configuration Register (LTDC_AWCR) has 12 bits Accumulated Active Width and 11 bits Accumulated Active Height. That is enough to drive 1900x1200 display. But why datasheet specifies only XGA for the LCD-TFT controller?

[Amel NASRI]

Posted on February 26, 2018 at 15:05

 Hi yevtukhov.marat‌,

All depends on the characteristics of the LCD display you will be using and mainly its pixel clock.

 XGA isn't really a limitation.

I suggest you refer to https://www.st.com/content/ccc/resource/technical/document/application_note/group0/25/ca/f9/b4/ae/fc/4e/1e/DM00287603/files/DM00287603.pdf/jcr:content/translations/en.DM00287603.pdf (LCD-TFT display controller (LTDC) on STM32 MCUs): even if STM32H7 isn't yet supported in this application note, it can help you to understand more the possible configurations and limitations to interface LTDC with STM32 families.

-Amel

PS: Edited on 27/09/2019 to fix link to AN4861

[Tesla DeLorean]

Posted on February 26, 2018 at 17:11

Likely to hit a ceiling on the memory bandwidth and refresh rate

[Marat Yevtukhov]

Posted on February 27, 2018 at 06:13

Thank you very much indeed