Hi @EStei.3 ,On our board, the boot pin was connected to the CAN_RX signal.Sorry, but for now we have not been able to program the option bytes; we have only managed to insert them into the .hex file.To program them at the factory, STM32_Programmer_C...

“Hello @EStei.3 ,I think it could be done as follows by inserting the option bytes into the hexadecimal file based on the source file and the linker file.To do this, the linker script (.ld) is modified by adding a new memory block and a new segment. ...