Not sure of the use of EXT_RESET signal on P19 of nRF51-DK

[Bret Foreman]

I want to use the nRF51-DK board as a programmer for my target. As I understand it, this can be done with the signals on P19. However, there is one signal, EXT_RESET, that I'm not sure what to do with. Should this be connected to any of the nRF51 pins on my target?

[RK]

It's to be connected to the reset pin (or rather the nRESET pin) on any external target. On the nrf51822 however the reset pin and SWDIO are the same pin, so you don't need to connect it to anything, reset is accomplished in a different way.