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Initialize IS45S16320F SDRAM on FMC of STM32H745

VZolt.1
Associate II

Hi all,

We have an SDRAM connected on the FMC interface of the STM32H745, wired as in the attached screenshots.

What is notice is that i am writing 0x12345678, but i get 0x12341234.

This is one, the other is that also these values are gone after some time, so it seems that SDRAM is not keeping them.

So there might be several problems.

Measured the clock signal on the line, it is 100 Mhz.

I was experimenting with the timing parameters, but finally left them on the max value as it did not solve the issue.

Could you please take a look, maybe you notice something?

Thanks in advance, upon request I can provide more data.

1 REPLY 1
VZolt.1
Associate II

Nevermind, found the issue, there was a missconfig between bank and right CS