Using the FMC of the STM32U575 for SDRAM

[PKolo.1]

Hello everyone,

I am currently working with a STM32U575ZIT6 and am trying to connect as much RAM as possible to its FMC peripheral. However, SRAM and PSRAM are not available in the sizes I am looking for, so I was wondering if it would be possible to do a hacky solution and connect an SDRAM to the FMC and implement the refresh signal with a timer. I have also seen SDRAMs with an "auto refresh", does that mean they don't need a refresh signal at all anymore?

Thank you in advance for any help!

[Alex - APMemory]

Hi, 

How much RAM do you need?

OPI support from 64Mb up to 512Mb, such as APS6408L... ,APS12808L..., APS25608N, APS51208N, APS256XXN, APS512XXN. 

APS6408L-3OBM-BA is on the STM32U5 Disco (https://www.st.com/resource/en/data_brief/b-u585i-iot02a.pdf) & EVK (https://www.st.com/en/evaluation-tools/stm32u575i-ev.html), but all densities are compatible and supported

Alex