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→XMEGA Programming & Pull Up Resistors
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 Voltage Levels ==
If you want to program an XMEGA target through with the CW506and CW-Lite, you'll have to place a pull up resistor on your UFO Board. Connecting You must connect a 330 Ohm resistor between the VREF GPIO3 and PDIC pin should allow (you to can use the XMEGA programmerjumper cables instead of soldering or physically modifying your board).
To program the target set "Target IO3" to GPIO in "Scope Settings"-->"Target IOn pins". Next set GPIO3 to low from "Scope Settings"-->"Target IOn GPIO mode". IMPORTANT: You must set GPIO3 to high after programming, otherwise the chip will remain in programming mode, and your code will not execute. There is a known issue where GPIO3/4 do not reach VREF/VCCIO. Usually this does not cause problems, unless you are using a reference voltage above 3.3 volts. 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 ==