Hello ST,
I am working with STM32WBA52 and I am no longer able to connect to the device using STM32CubeProgrammer.
When trying to connect, I got the following error: The interface firmware FAILED to reset/halt the target MCU
A fail.txt file is also generated. The connection fails even when trying:
- Connect under reset.
- Different SWD frequencies.
- PH3 (BOOT) pin forced high.
The issue appeared after changing security-related option bytes (TZEN / RDP). The device seems to boot normally, but debug access is blocked. I suspect the MCU enters Secure state early and prevents the debugger from halting the core.
Is this expected behaviour on STM32WBA when TZEN = 1 and RDP = 1 without Debug Authentication configured?
Does STM32WBA block SWD access by default in Secure mode?
Best Regards,
Dhia
