STM32H743 on Nucleo-144 Fail on USART bootloader Read Memory command

[KDenn.1]

I am trying to read memory in the ITCM area (address 0x00000100) via the UART bootloader. I receive a NACK after sending address and checksum.

As far as troubleshooting, I can read the Flash area at 0x08000000 fine and send the GO command without issues. I am able to start a program that writes data into the ITCM area and can then read that data using STMCubeProgrammer.

Any help would be appreciated.