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CCS/CC2640R2F: custom board hardware initial board bring-up issue

Part Number: CC2640R2F
Other Parts Discussed in Thread: CC2640,

Tool/software: Code Composer Studio

the custom board shows voltages at VDDR and VDDR_RF is approximately 1.9v (but in cc2640 hardware checkout it shows about 1.6v)
at DCOUPL pin it is approximately 1.9v (but in cc2640 hardware checkout it shows about 1.28v)
and also when connected the custom board with XDS110 jtag and while trying to verify through CCS it shows the below mentioned error


-----[An error has occurred and this utility has aborted]--------------------

This error is generated by TI's USCIF driver or utilities.

The value is '-233' (0xffffff17).
The title is 'SC_ERR_PATH_BROKEN'.

The explanation is:
The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.
An attempt to scan the JTAG scan-path has failed.
The target's JTAG scan-path appears to be broken
with a stuck-at-ones or stuck-at-zero fault.

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