Can I use OctoSPI Ram as external FrameBuffer memory in STM32H7B3?

[SCass.1]

Dear TouchGFX team,

I am developing STM32H7B3 including:

-Display 5" (480x800) 16bit color

-OctoSPI Flash

etc..

I need ram for two frame buffer, the internal ram is to small for my GUI application, (memory needs for one frame buffer is 480x800x2 =768KB).

I'm thinking to use an externat Octo spi ram memory to store two framebuffer.

I need simple UI complexity: static, few/simple animations. 

I'd like to use the oct spi ram to reduce the pcb complexity/cost.

The speed and memory latency seems fine.

Up to 110MHz in DTR available in STM32H7B3

Memory latency around 10 CLK.

I'd like to know a your opinion/advice.

What do you suggest ?

Thankyou 

Best Regards

Stefano

[Alexandre RENOUX]

Hello,

OctoSPI RAM is definitely a good idea. I don't know how much you progressed since you posted your question but this is something that you can use for storing your framebuffers. OctoSPI RAM seems to become more and more popular so we'll probably see more boards with this kind of RAM in the future.

/Alexandre

[Alex - APMemory]

OPI is surely most suitable external memory choice for this MCU (from 8MB to 32MB). If the performance is good enough, you could also consider QSPI SDR or DDR RAM (starting from 2MB with SOP8).

Alex