Hi @_kalpesh,I'm sorry, but the STM32F4 is not supported by the X-CUBE-SMBUS - STM32Cube SMBus/PMBus embedded software (AN4502) - STMicroelectronics.The F4 series are using older version of the I2C IP, which is AFAIK limited to SMBus 1.0 and was not ...
Hi @DAlbe.3 ,thanks for sharing the additional details. I realize that with voltage dropping this low, BOR setting is probably irrelevant.If the fail mechanism is the same as the one the workaround is trying to correct, then the cause is the system i...
Hello @DAlbe.3 ,you wrote it's easy to reproduce, but probably only with your HW and settings. We tested this WA extensively when the issue was found new and found it working reliably.It's not that we don't trust you, but I'd like to know more about ...
The problem is that the OPTR read always return the actual OB value, not the value you are currently programming. So the SET_BIT will read RDP value AA, modify nBOOT bits, and write back the AA!The boot bits need to be programmed first, then OB progr...
Hello @DAlbe.3,try, instead of setting OBL_LAUNCH, perform a reset to reload the OB. Transition to standby or shutdown mode will also do the job. The RDP is behaving differently here, probably to prevent a deadlock on OB mismatch.BR,J