Using mbed w/ RedBear Nano and nRF51822



I’m wondering if I can use the MK20 USB board to program other nRF51822 that aren’t RedBear Nano’s.

If the nRF51822 exposes the two SWI pins, can I just use wires between the module and the MK20 USB to load mBed binaries? Or is there a separate process of loading some kind of mBed core onto the nRF51822 to get it to accept mbed binaries and show up as a USB drive on the computer?