Now that I've given up trying to do OpenSDA with a FRDM-KE04Z, I'm trying to connect a J-Link directly to the SWD port. I added the header to the target chip (not the OpenSDA interface chip) and removed R35 (to isolate CLK) and R58 (to isolate RESET). I'm using the correct 20-pin to 10-pin ARM interface, and even ohm-ed it out. No connection. J-Link LED twinkles orange, meaning RESET is asserted. Put the scope on the RESET line and see a sawtooth waveform going between about 1V and 2V. Where in the heck is that coming from? I've pretty much decided to smash the FRDM-KE04Z into tiny pieces and lay out a simple board of my own, with just the Kinetis chip, SWD connector, and a bit of I/O. This shouldn't be this hard! What am I missing? I'm really hoping it's just something I'm doing wrong.