I prototyped a nRF52832, WLCSP package, with a fab (PCBA) and put jumpers between my 32Mhz crystal and the chip, attempting to connect with a j-link in SWA mode, I cannot connect (I get a reference voltage, but no signal) when taking an O-scope to the SWIO and SCLK there' signal from the J-link but it doesn't look as if the response is hitting 3V (or it could be fuz).
My conclusion is that the 32Mhz clock, with the jumpers acting as antenna, and giant capacitors, that the chip isn't in tim with..it self. I've tried hooking up a 32Mhz signal generator to the jumpers, still no connection, but I was curious what type of signal the IC would expect.
