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XMEGA programmer and pull up resistor updates
Setting SW3 to the LEFT position will drive the 3.3V power supply on the target board from the banana jack connector, which also connect to test point TP9 (the large red test point).
== XMEGA Programming & Pull Up Resitors ==
If you want to program an XMEGA target through the CW506, you'll have to place a pull up resistor on your UFO Board. Connecting a 330 Ohm resistor between the VREF and PDIC pin should allow you to use the XMEGA programmer.
There is a known issue where GPIO3/4 do not reach VREF/VCCIO. Usually this does not cause problems. In some cases though, the high level voltage will be too close to its threshold to provide reliable performance. In this case a 330 Ohm pull up resistor between VREF and the affected pin should resolve the issue
== Use Cases ==