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SparkFun Electronics will be closed on July 3rd, 2015 in observance of Independence Day. Any orders placed after 2:00pm MT on July 2nd will be shipped out after the weekend. Thanks!

Member #310535

Member Since: March 19, 2012

Country: United States

  • You’ll need to lift pin 20 (ARef) - it’s tied to Vcc on the board. See figure 23-1 and section 23.5.2 in the datasheet (http://www.atmel.com/Images/doc8161.pdf).

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