Pin #

Function

Description

1

EG

Green Ethernet status LED control line.

2

EY

Yellow Ethernet status LED control line.

3

RX+

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

4

RX–

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

5

Vout

"Clean" power for the magnetics circuitry:

EM200C-02 devices: 3.3V

EM200C-04 devices: 1.8V

6

TX+

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

7

TX–

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

8

GPIO8

General-purpose I/O line 8.

9

GPIO7

General-purpose I/O line 7.

10

GPIO6

General-purpose I/O line 6.

11

GPIO1

General-purpose I/O line 1.

12

GPIO0

General-purpose I/O line 0.

13

VCC

Positive power input, 5V nominal, ±5%, max. current consumption 50mA

14

GND

System ground.

15

GPIO3/DTR

General-purpose I/O line 3; conventionally also DTR output line of the serial port.

16

GPIO2/DSR

General-purpose I/O line 2; conventionally also DSR output line of the serial port.

17

TX/W1out/dout

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

18

RX/W1in/din

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

19

GPIO4/CTS/W0&1in/cin

General-purpose I/O line 4; also CTS, W0&1, and cin input of the serial port.

20

GPIO5/RTS/W0out/cout

General-purpose I/O line 5; also RTS, W0, and  cout output of the serial port.

21

SG

Green status LED control line.

22

SR

Red status LED control line.

23

RST

Reset line, active high.

24

MD

Mode selection pin.