Programming nrf52 DK board using external j-link

[Sunil vignesh]

Hi,

 I have two nRF52 DK boards which i bought one is 2 years old and another 1 year old.. Past week both DK boards are failed to connect with the computers but the power supply is going and the nrf52832 controller works fine. the LED5 "segger j-link IC" not working.

I need to know that i have "J-Link lite cortexM" board

Is it possible to program the nrf52 DK with external J-link if yes what are the pins and where i need to connect it and is there any track that i need to cut it

[Kenneth]

Hi,

You should find description in the nRF52-DK user guide:
https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_debug_out.html 
https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/int_mcu_firmw.html

Kenneth

[Sunil vignesh]

Hi Kenneth,

1. Is it possible to overwrite the interface MC sing external j-link ? Is there any video link or documentation please provide

2. I found that P18 "DEBIG IN " headers are direct programming pins of nrf controller.

DID i connect external j-link directly to that pin and I will se it or i need to cut off "SB27,SB26,SB20,SB21,SB22,SB23,SB24,SB25"