I made custom board using stm32f207 MCU and In few of board I have faced issue that board stops working after some time and, In STM Utility it shows RDP readout protection level FF and it doesn't execute the code and unable to reprogram.
Read out protection issue ,I am unable to reprogram the board and the previous code is not executing as well. I have faced this issue in multiple boards .I am unable to debug this issue since long and the last option is to replace mcu with new one. A...