26-pin connector

Pin

Name

Dir

Function 1

Function 2

Function 3

1

I/O 3

I/O Line 3

A2D 3 

2

I/O 4

I/O Line 4

A2D 4 

3

I/O 1

I/O Line 1

A2D 1 

4

1/O 2

I/O Line 2

A2D 2 

5

I/O 24

I/O Line 24

I/O Group 3 bit 0

6

I/O 23

I/O Line 23

I/O Group 2 bit 7

Serial Receive

7

I/O 25

I/O Line 25

I/O Group 3 bit 1

8

I/O 22

I/O Line 22

I/O Group 2 bit 6

Serial Transmit 

9

I/O 26

I/O Line 26

I/O Group 3 bit 2

10

I/O 21

I/O Line 21

I/O Group 2 bit 5

11

I/O 27

I/O Line 27

I/O Group 3 bit 3

12

I/O 20

I/O Line 20

I/O Group 2 bit 4

Network I2C Serial Data

13

I/O 28

I/O Line 28

I/O Group 3 bit 4

14

I/O 19

I/O Line 19

I/O Group 2 bit 3

Network I2C Serial Clock

15

I/O 29

I/O Line 29

I/O Group 3 bit 5

16

I/O 18

I/O Line 18

I/O Group 2 bit 2

PWM1 

17

I/O 30

I/O Line 30

I/O Group 3 bit 6

18

I/O 17

I/O Line 17

I/O Group 2 bit 1

Timer 1 Xtal / PWM2 

19

I/O 31

I/O Line 31

I/O Group 3 bit 7

20

I/O 16

I/O Line 16

I/O Group 2 bit 0

Timer 1 Xtal 

21

+5v

+ 5 Volts

22

+5v

+ 5 Volts

23

GND

0 Volt Reference

24

GND

0 Volt Reference

25

GND

0 Volt Reference

26

GND

0 Volt Reference