nRF51822 connot be detected by Segger on nRF51 DK.

[teddy.c]

I have tried to flash my application targeting nRF51822 on our board by using a Segger on nRF51 DK. However, Keil compiler always shows that it couldn't find any nRF51822 target (and always flashes the nRF51422 on the nRF51DK).

I am not sure that I set the hardwares correctly. You could see the my hardware setup in the attached picture.

However, there is no additional power supply for our board. It is just connected with the VCC and GND from P20 of the nRF51 DK.

Would you please help me to solve this proble? Thank you very much.

[MartinBL]

Hi

It looks like you have forgotten to connect VTG (pin 3 on the header in your picture (P20)). The VTG pin should be connected to Vdd on your board. This is essential as VTG is measuring the voltage on your external board. If it does not measure any voltage the nRF51DK will assume that there is no external board connected.

[teddy.c]

Thank you very much. Now, nRF2GO can sucessfully detect the nRF51822.