External RAM for FrameBuffer on STM32H7S7L8

Leo99 · ‎2024-06-24

Good morning to all,
I’d like to ask your advice.
I have to insert an external RAM for the framebuffer because the internal one is not enough for LCD that I will drive (LCD-TFT LVDS 7 inch 1024x600).
Which external RAM do you recommend? Could a QuadSPI work?

SofLit · ‎2024-06-24

Hello,

You can use HSPI interface. You can refer to the STM32H7S78-DK board as reference (using APS256XXN-OBR memory):

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Leo99 · ‎2024-06-24

I add that I have a micro LQFP176 pin.
Do I have to use the FMC? Quad or Octo SPI?

SofLit · ‎2024-06-24

Hello,

You can use HSPI interface. You can refer to the STM32H7S78-DK board as reference (using APS256XXN-OBR memory):

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

Leo99 · ‎2024-06-24

Thank you!
The problem is that in the package LQFP that I’m using it is not available the HexaSPI only Octa.

SofLit · ‎2024-06-24

In that case use it in Octal mode:

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Leo99 · ‎2024-06-24

Perfect, thank you very much!

BarryWhit · ‎2024-06-27

Knowledge Base: How to set up the FMC peripheral to interface with the SDRAM IS42S16800F-6BLI from ISSI

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