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.

[wlgrd]

Can you post the schematic for your programming connections? Is the external board powered? What voltage? The jlink lite has some minimum target power required, can't remember exact numbers...

[Miroslav]

To be honnest, my PCB is working. It was sent to me by some guy in France. But I cant get him any more. Blinky code is on that PCB and it is working, but connected on jlink chip IDCODE cant be recognized by SWD. Is ther possibility that device is somehove "locked". I saw lock for read and download but lock for ID I never saw... And voltage is 3.3V

[wlgrd]

Are you saying there is an onboard segger device? Have you tried doing an erase before programming? What is this IDCODE exactly?

[Miroslav]

(/attachment/7b0d58be288861c389a7753437193b7a)

Here is the picture. Like chip not have anny communication with segger

[Nguyen Hoan Hoang]

What are the connections (pins) between your PCB and the JLINK ?