jlink problem

[Miroslav]

Hi, My Jlink lite CortexM work with nrf51822 DK boards. But my PCB with nrf51822_xxAA chip can't download code. I'm using ukeil When I chek in utilities Jlink can't recognize SW IDCODE of device. All is set good. PCB is 100% good. Thank you.

[Miroslav]

Problem solved, I placed 100 ohm resistor serial and 12k to ground. I shortened lines 2 times and now all working. Thank you all!

[Nguyen Hoan Hoang]

Keil show the SN of the link means that it is able to communicate with jlink. IDCODE not shown is because JLink can't talk to your board.