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ATymo.1
Associate II
September 10, 2021
Solved

STM32h725 FMC problem

  • September 10, 2021
  • 4 replies
  • 1761 views

Hello. I cerate new project for stm32h725zgt chip and can't activate any of FMC interfaces. It's not active. On stm32f767vgt in past all was ok. What I now do incorrect?

How I can to fix this problem?

This topic has been closed for replies.
Best answer by TDK

SDRAM isn't supported on the STM32H725 in a LQFP144 package. The required pins are not broken out.

4 replies

Cartu38 OpenDev
Graduate II
September 10, 2021

Works for me first guess (Win10 / IDE 1.7.0)

0693W00000DmmVUQAZ.jpg

ATymo.1
ATymo.1Author
Associate II
September 10, 2021

Problem, that its not activated after "clock and chip enable" enabling

ATymo.1
ATymo.1Author
Associate II
September 10, 2021

Thanks for answer.

I have win10

0693W00000DmmpyQAB.pngI Just create a project and activate "clock and chip enable" in SDRAM1 section of FMC. Any other field is stay inactive after activatation. On popup window written "Data disabled: Internal bank number disabled". In other section ("NOR Flash/PSRAM....") same situation in any configuration

TDK
TDKBest answer
September 10, 2021

SDRAM isn't supported on the STM32H725 in a LQFP144 package. The required pins are not broken out.

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Khouloud OTHMAN
Associate
September 16, 2021

Hello @ATymo.1​ ,

Thanks for your feedback.

Actually, as already stated by @TDK​ , STM32H725ZGTx does not support the SDRAMs. Referring to STM32H725xE/G  datasheet , the SDRAM1 is only available for H725Axx and H725Ixx:

0693W00000DnS7oQAF.png 

With this being said, the the current implementation of the FMC for H725 devices in STM32CubeMX will be reviewed and updated in a near future release.

I'll keep you posted with the updates.

Thanks for your contribution.

Khouloud.