Resolved! When accessing the System memory area from the Cortex-M4 on the STM32H755, a HardFault occurs.
I'm using a NUCLEO-H755ZI-Q board. I tried to read following address.TEMPSENSOR_CAL1_ADDR (0x1FF1E820UL)TEMPSENSOR_CAL2_ADDR (0x1FF1E840UL)But I can't. it causes HardFault interrupt.I also tried to read the area from Debugger.Debugger said Failed to ...