I got a PCB that uses the XMEGA256A3BU with JTAG. I have been using this board for several months. But all of a sudden I can no longer program the board, I checked all the pins and found TCK and TDO have a resistance of about 10 ohms to GND,
Does this sound like a static issue?
Is there any way to get this XMEGA working again with JTAG?