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nRF52810 ic not recognized by segger J link

SWDIO,SWDCLK,VCC AND GND have been taken out from the nrf52810 ic and proper connections have been made to the jtag end of the j link device (connecting all grounds also) but the target is not recognized by the j link commander.Please guide how to program the nrf52810 ic using J link.

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  • We also tried on laird bl651 having nrf52810 but atleast any of the devices we tried should have been recognized by the j link.When i open the j link commander it shows vref =0v although i have connected vcc of the target to the vref of the 20 pin jtag connector of j link and i also checked using multimeter the voltage between vref and gnd it was 3.2-3.3 volts

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