element:U2 package:TQFP100 element:LOGO2 package:OSHW-LOGO-M polygon element:JP2 package:SFE-NEW-WEBLOGO polygon polygon polygon polygon polygon polygon polygon polygon polygon polygon polygon polygon polygon 0 1 2 3 4 5 6 7 8 9 10 11 12 13 A0 A1 A2 A3 A4 A5 6 A7 A8 A9 A10 A11 A12 A13 A14 A15 22 24 26 28 30 31 32 33 34 35 36 37 38 39 41 40 43 42 45 47 49 MOSI 44 46 MISO 48 SS SCK ANALOG IN COMMUNICATION AREF GND GND GND 3.3V RX0 TX0 DTR TX0 RX0 RESET 3V3 5V VIN GND GND SDA 20 SCL 21 TX2 16 RX2 17 RX3 15 TX3 14 RX1 19 TX1 18 PWM 5V GND DIGITAL