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.