Arduino Clone using ATXMega64D4

• Sparkfun shield board with TQFP breakout board

• Uses the default pin mapping for the 'xmega64d4' variant
• Runs at 3.3V vs 5V (and is not 5V tolerant)
• TWI (2-wire) pins brought out separately (no 'Rev 3' pins)
• You can EASILY build your own!