What is the max clock speed for FMC SDRAM. How to speed up the SDRAM ?

[SIBIN THOMAS]

Hello Everyone,

I am using STM32H753I-EVAL board and I am using on board SDRAM for all my data storage and computations (which includes floating point calculations). I am able to run SDRAM at 100Mhz. Even though my controller is running at 400Mhz there are some timing issues because of my limited SDRAM speed. Is 100Mhz maximum for FMC SDRAM ? Is there any way to speed up my FMC clock.

Any suggestion would be helpful.

Thanks.

[S.Ma]

Check all datasheets and reference manuals for the theorethical limit. Then check the gpio bus signal integtity with an oscilloscope to see if the trace load is fine. Gpio speed dual bit reg tuning is probably the only sw tuning knob available for signal integrity.

Internal sram or stack local variable is to be used to be data throuput efficient. If the external memory has wait states, it might not alwsys yield best results.