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Error on Unable to access the DAP on CCSv6

Other Parts Discussed in Thread: CC2650

Hello,

I am programming my CC2650 custom made board. I have a connector to connect the other custom board to my main CC2650 board. I am able to debug and test the code on my custom board successfully if i am not connecting anything via connector, but if the other board is connected then CCS throws some error as follows,

"Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). "

I have checked my hardware and even lowered my TCLK, but i don't think this is why the error is popping up. Please let me know why this error is popping out and any solutions to solve it.  I am really stuck with this problem and left out with no solution.

I am using WINDOWS 10 os, CCSv6.1 and XDS100v3 debug probe. Also i am trying to debug the codes to my CC2650 custom board via JTAG in SmartRF06.

Thanks in advance.

Regards,

Nitin