Pin #

Function

Description

1 (1,2)

GPIO28

General-purpose I/O line 28 (does not belong to any 8-bit port).

2 (1,2)

GPIO27

General-purpose I/O line 27 (does not belong to any 8-bit port).

3 (1,2)

GPIO26

General-purpose I/O line 26 (does not belong to any 8-bit port).

4 (1,2)

GPIO25

General-purpose I/O line 25 (does not belong to any 8-bit port).

5 (1,2)

GPIO24

General-purpose I/O line 24 (does not belong to any 8-bit port).

6 (1,2)

GPIO7/P0.7

General-purpose I/O line 7 (P0.7).

7 (1,2)

GPIO6/P0.6

General-purpose I/O line 6 (P0.6).

8 (1,2)

GPIO5/P0.5

General-purpose I/O line 5 (P0.5).

9 (1,2)

GPIO4/P0.4

General-purpose I/O line 4 (P0.4).

10 (1,2)

GPIO3/P0.3

General-purpose I/O line 3 (P0.3).

11 (1,2)

GPIO2/P0.2

General-purpose I/O line 2 (P0.2).

12 (1,2)

GPIO1/P0.1

General-purpose I/O line 1 (P0.1).

13 (1,2)

GPIO0/P0.0

General-purpose I/O line 0 (P0.0).

14

<No connection>

This pin must be left unconnected.

15

GND

System ground.

16 (1,2)

GPIO30

General-purpose I/O line 30 (does not belong to any 8-bit port).

17

VCC

Positive power input, 3.3V nominal, +/- 5%, max. current consumption 300mA (100BaseT, PLL on).

18 (1,2)

GPIO29/CO

General-purpose I/O line 29 (does not belong to any 8-bit port);

square wave output line.

19 (1,2)

GPIO31

General-purpose I/O line 31 (does not belong to any 8-bit port).

20

SG

Green status LED control line.

21

RST

Reset line, active high.

22

SR

Red status LED control line.

23

MD

Mode selection pin.

24 (1,2)

GPIO8/P1.0/RX0

General-purpose I/O line 8 (P1.0);

RX, W1, and din input of the serial port 0.

25 (1,2,3)

GPIO16/P2.0/INT0

General-purpose I/O line 16 (P2.0);

interrupt line 0.

26 (1,2)

GPIO9/P1.1/TX0

General-purpose I/O line 9 (P1.1);

TX, W1, and dout output of the serial port 0.

27 (1,2,3)

GPIO17/P2.1/INT1

General-purpose I/O line 17 (P2.1);

interrupt line 1.

28 (1,2)

GPIO10/P1.2/RX1

General-purpose I/O line 10 (P1.2);

RX, W1, and din input of the serial port 1.

29 (1,2,3)

GPIO18/P2.2/INT2

General-purpose I/O line 18 (P2.2);

interrupt line 2.

30 (1)

GPIO11/P1.3/TX1

General-purpose I/O line 11 (P1.3);

TX, W1, and dout output of the serial port 1.

31 (1,2,3)

GPIO19/P2.3/INT3

General-purpose I/O line 19 (P2.3);

interrupt line 3.

32 (1,2)

GPIO12/P1.4/RX2

General-purpose I/O line 12 (P1.4);

RX, W1, and din input of the serial port 2.

33 (1,2,3)

GPIO20/P2.4/INT4

General-purpose I/O line 20 (P2.4);

interrupt line 4.

34 (1,2)

GPIO13/P1.5/TX2

General-purpose I/O line 13 (P1.5);

TX, W1, and dout output of the serial port 2.

35 (1,2,3)

GPIO21/P2.5/INT5

General-purpose I/O line 21 (P2.5);

interrupt line 5.

36 (1,2)

GPIO14/P1.6/RX3

General-purpose I/O line 14 (P1.6);

RX, W1, and din input of the serial port 3.

37 (1,2,3)

GPIO22/P2.6/INT6

General-purpose I/O line 22 (P2.6);

interrupt line 6.

38 (1,2)

GPIO15/P1.7/TX3

General-purpose I/O line 15 (P1.7);

TX, W1, and dout output of the serial port 3.

39 (1,2,3)

GPIO23/P2.7/INT7

General-purpose I/O line 23 (P2.7);

interrupt line 7.

40

AVCC

"Clean" 2.5V power output for magnetics circuitry.

41

TX-

Ethernet port, negative line of the differential output signal pair.

42

EG

Green Ethernet status LED control line.

43

TX+

Ethernet port, positive line of the differential output signal pair.

44

EY

Yellow Ethernet status LED control line.

45

RX-

Ethernet port, negative line of the differential input signal pair.

46

AGND

Analog ground.

47

RX+

Ethernet port, positive line of the differential input signal pair.