STM32 MCUs Products

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Resolved! I2C Bootloader Slave address

Hi,I’m working on the STM32G491 series. In my current project, the STM32 is configured as an I2C slave and communicates with another processor over I2C.When entering bootloader mode for flashing, the STM32 responds with the slave address 0x5F, which ...

abhijith_raj_0-1750410440146.png

Resolved! Can I2C pins be in different ports?

Hi,I’m currently implementing I2C in slave mode using the STM32G491 series. Due to pin constraints, we’re considering using SCL and SDA pins from different GPIO ports—for example, SCL from port PA and SDA from port PC. Is it acceptable to assign I2C ...

Resolved! Possible risks of voltage drop in VDD of STM32F3

Hi !I am evaluating the risks associated with STM32F3, where I am speculating a case where the voltage drops in VDD for few microseconds. For an example, let us assume the voltage drops from 3.3V to 3.0V for few microseconds. This occurs every x ms (...

Resolved! STM32H750 rev V or Y

Hello ST experts,I have bought a STM32H750IBT microcontroller. Could you please let me know how I can find whether it is V revision or Y revision device?

STM32F103C8T6 Incorrect Memory Size

Recently i bought this STM32F103C8T6 Board along with ST Link V2 I was trying to upload a HEX(60KB) file using STlink software but i noticed something wierd, memory size in both pics is showing 256KB but this device only comes with 64KB flash memory ...

STM32F103C8T6.png Screenshot 2025-06-19 123755.png Screenshot 2025-06-19 123829.png
Titan by Associate II
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Resolved! STM32H7 OctoSPI Multiplexing XIP

I am designing a board with an STM32H725ZGT3. I would like to multiplex external Flash and RAM on the same Octospi bus and use the external flash as execute in place memory. Is this a supported configuration? 

WA by Associate
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STM32f401ret6 I2C Slave Configuration

I have been trying to configure Nucleo STM32F401RE board as an I2C Slave and Xavier Nx as Master but it is throwing me BUSERR.I am adding some the main.c file below to explain my configurationmain.c/* USER CODE BEGIN Header */ /** *******************...