Missing SDRAM option in STM32CubeIDE for STM32H750VB

[htMercury]

Hi, I'm developing a STM32H750VBT6 board that need SDRAM, the datasheet said that only LQFP144 package does not support SDRAM, but I cannot find SDRAM option in FMC configuration. Can someone please help me.

[AScha.3]

Hi,

(i never tried before...but) here on H750V , 

seems little bit "hidden" , only bank2 can be sdram :

[Tesla DeLorean]

I'd be surprised that the 100 pin part exports all the pins needed for SDRAM and the 144 pin doesn't. 

Go through the pin table in the Data Sheet and check manually. 

[htMercury]

I tried following your configuration but mine donot have Bank Mapping configuration. Can you please a little bit more detail ?

[AScha.3]

No detail - i just have it there. :)

Maybe - different H7 packs, i have:

- using still V1.10.0 with MX 6.9.1   -- maybe there something different in version you use.

btw

Why you choose sdram on FMC , using up many pins on this 100pin package - and not a quad-spi psram ?

[TDK · Accepted solution]

SDRAM is not available on the LQFP100 due to the missing A0, A1 pins (among others).

Contrary to the datasheet, SDRAM is available on the LQFP144 according to CubeMX and my own brief analysis.

@Amel NASRI Can you please look into this?

[Amel NASRI]

Hi @TDK ,

Thanks for bringing this issue to our attention. This is reported internally (Internal ticket number 187681).

-Amel

[htMercury]

Hi @AScha.3,

After considering your suggestion about using QSPI PSRAM, I've searched for information about it and am somewhat confused about the QuadSPI mode. It has an option "Dual Bank with Quad Lines." As I understand it, this supports two QSPI devices. Can I use a QSPI NOR Flash and a QSPI PSRAM simultaneously, or can I only use two flashes?

Sorry for my dumb question, but I cannot find any detailed information about using QSPI PSRAM with STM32 and have no idea about "Bank". I have just started learning STM32 after a long time playing around with ESP32, which always has on-chip PSRAM and Flash (If this question is off-topic, I'll create a new topic).

[AScha.3]

Hi,

sorry, i got it mixed up :

on H750 you have quad-spi : -- for flash .. two banks ,  flash (ram - dont know, but i see no "ram" in ds. Maybe you know: if it has same access mode as the flash chips , it could work with ram also. )

on H563 (i have also) you have octo-spi : -- for ram or flash...

[htMercury]

I'm still unclear on a few things, but anyway thanks for your dedicated support :smiling_face_with_heart_eyes: