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AM2634: Trouble writing Memory Block at 0x53200804

Part Number: AM2634

Tool/software:

Hi,

We are using AM2634 with custom designed hardware and CC Studio version 12.7.0.00007. 

Until now the controller was able to execute and debug the code perfectly without any issues with XDS110 Debugger. But suddenly we are getting the error

"Cortex_R5_0: Trouble Writing Memory Block at 0x53200804 on Page 0 of Length 0x4: (Error -1170 @ 0x53200808) Unable to access the DAP."

we have tried debugging with other debuggers, boot modes, other programs (even with programs included in MCU plus SDK version 10)