Digital I/O Pin 4

Digital I/O 13

Digital I/O Pin 5

+3.3V DC

Digital I/O 6

Analog Reference Voltage

Analog Input 0

Analog Input 1

Analog Input 2

Analog Input 3

Analog Input 4

Analog Input 5

Analog Input 6

Analog Input 7

+5 V Regulated DC

Reset

Ground

DC Supply Voltage Input

Digital I/O 1 / Serial Transmit

Digital I/O 7

Digital I/O 0 / Serial Recieve

Digital I/O 8

Reset

Digital I/O 9

Ground

Digital I/O 10

Digital I/O 2

Digital I/O 11

Digital I/O 3