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TM4C123GH6PZ: (Error-1170 @ 0x0) Unable to access the DAP

Part Number: TM4C123GH6PZ

Tool/software:

Hi all,

As the title, error-1170 occurred while debugging.

The following information showed the environment of the work.

If more information are needed, please let me know.

-IDE: CCS Version: 9.2.0.00013 

-Debug tool: XDS200

-Description:

Previously, we changed the ARM MCU from MSP432 to TM4C.

After the troubles which were occurred with the development with the launchpad were solved, we designed a new PCB.

The PCB has almost the same functions as the one with MCU, MSP432P401R.

As soon as the sample PCBs were finished, I made several PCBs and check the debugging and/or download firmware to TM4C123GH6PZ.

All of the them can be debugged completely but one of them met the error-1170 when it did the same operation again.

I have met the some trouble while using launchpad.

It is solved by using LM Flash Programmer to erase the firmware of the launchpad but not this time.

I have tried to reset the power of the PCB, reset the XDS200, and have tried all I could do.

(Note: other PCBs can be debugged with the same PC, same XDS200 and other settings.
The project for debug operation is an empty project, I do not the the operations of the code would cause the trouble.)

I think the trouble was the settings of the MCU or the bad status of the chip.

How can I solve the trouble?