NRF51 DK (nrf51422) Bricked? Cannot Recover?

RE: NRF51 DK (nrf51422) Bricked? Cannot Recover?

byron8899 — Thu, 24 Dec 2015 02:30:13 GMT

Hi Hung, sorry for late reply. Yes, I found out the chip is dead. Thanks and happy holidays

RE: NRF51 DK (nrf51422) Bricked? Cannot Recover?

Hung Bui — Mon, 21 Dec 2015 13:33:39 GMT

Hi Byron,

You can try to check if it's the issue with the power supply's voltage regulator or it's the nRF51 chip damaged by cutting solder bridge SB9. Then the power supply to the chip will have to go through P22.

RE: NRF51 DK (nrf51422) Bricked? Cannot Recover?

byron l — Sun, 20 Dec 2015 17:18:55 GMT

Thanks for your reply. I checked the voltage of the nrf chip. It suppiles 0.84 volts when powered with usb cable. I probed between the nrf current measurement and ground. So I guess the chip is burned out then.

RE: NRF51 DK (nrf51422) Bricked? Cannot Recover?

monpetit — Sun, 20 Dec 2015 12:28:15 GMT

Then you can check the condition of nRF51422 on your nRF51 DK with other debugger.

RE: NRF51 DK (nrf51422) Bricked? Cannot Recover?

monpetit — Sun, 20 Dec 2015 12:24:45 GMT

Can you detect an external target through your nRF51 DK? It might be worth a try. You should figure out what is out of order, whether J-Link or nRF51422.