Dear ST Community,
I am currently working on a simple blinky project on a custom STM32H745BIT6-based board. Initially, I developed the project using STM32CubeIDE version 1.16.1 with the H7 firmware package version 1.11.2. The configuration includes an external 25 MHz crystal, and the power supply is set to PWR_DIRECT_SMPS_SUPPLY with voltage scale 1. This setup was working fine without any issues.
However, after updating STM32CubeIDE to version 1.17.0, which also updated the firmware package to version 1.12.1, I encountered an issue. The program works fine on the first power-up, but after a power cycle, the MCU becomes unresponsive. Additionally, I am unable to connect to the MCU via STM32CubeProgrammer.
I came across a forum post: https://community.st.com/t5/stm32-mcus/unable-to-connect-to-stm32h7-devices/ta-p/49296
where a similar issue was discussed. Following the suggestion in the post, I pressed the reset pin while powering on, which allowed me to access the MCU and perform a mass erase. While this approach worked temporarily, it raises concerns about the long-term stability of the firmware and the difficulty of maintaining code over time, especially since this could be a product intended for market use in the next 10 years.
Although I can revert to CubeIDE v1.16.1 and firmware package v1.11.2 to avoid this issue, I would prefer to use the latest versions of CubeIDE and the firmware package.
For reference, I have verified the power supply configuration for PWR_DIRECT_SMPS_SUPPLY, and I have attached a schematic screenshot of my hardware.
I would greatly appreciate any suggestions or workarounds for this issue. Thank you in advance for your assistance.
