STM32 MCUs products

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Resolved! SDRAM 32bit bus can't be selected for STM32H735IGT6?

Hello,I'm trying to connect SDRAM to STM32 for the first time and I'm having trouble understanding the specs.In the datasheet, it seems the FMC peripheral can not support 32bit memory. Is it right? and could you recommend 64Mbit SDRAM for STM32H735IG...

JKim.51 by Associate II
  • 3 replies
  • 2 kudos

Dynamic memory allocation in PSRAM

Hi,Currently I am using STM32L4R9 discovery board, which has 16-Mbit (2MB) PSRAM. I have been able to allocate static memory inside PSRAM by using following code and also by changing linker script file (.ld). I have attached my edited linker script w...

SSG by Associate II
  • 6 replies
  • 0 kudos

Using the FMC of the STM32U575 for SDRAM

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 ...

PKolo.1 by Associate II
  • 1 replies
  • 0 kudos

STM32H7 PSRAM speed

Referring to this discussion: I try to ask here since the problem seems not to be related to touchgfx. I try to riassume my problem.It seems that the access ...

FMC Configuration.jpg FMC Clock.jpg
sbi by Associate III
  • 5 replies
  • 4 kudos

Resolved! STM32H7 SPI chip select intermittently delayed

I’m working on a project that uses an STM32H745IIK6. Occasionally, 32-bit SPI read data was invalid. This happened in about one out of every two hundred reads. To track down the cause, I added a few lines of code to toggle a GPIO pin as a scope trigg...

STM32H7 SPI cs delay 231002b.png
AMacI.1 by Associate II
  • 2 replies
  • 0 kudos

FMC: How to delay chip select?

I should combine STM32F479 with PROFIBUS-DP ASIC SCP4-2 The chip is aged. And requires delay of at least 30ns (by 3v3) between address and cs. Our previous design was based on SAM4S and their CPUs are offerring register to program such delays. In STM...

2023-09-25 10_32_07-Window.png
AlexKern by Associate
  • 4 replies
  • 1 kudos

Resolved! STM32F723 FMC SDRAM

Hi there,We use a STM32F723 controller and want to connect two external RAM devices.Now we have to select a RAM that fits to the FMC. What we can't find in the reference manual RM0431 is, if SDRAM-DDR functionality is provided or only SDRAM without D...

CObri.1 by Associate II
  • 2 replies
  • 2 kudos

Resolved! STM32H743 FMC LCD (SSD1963)

HiI have a question for my colleagues who use FMC to communicate with LCD. I am using CoreH7XXI with 743. The display does not respond to the data I send to it. I used Core4X9I with 429 before and everything worked. My question is whether I need to s...