Detailed Device Info

The EM1206 has three connectors: main connector, additional connector, and magnetics connector. Depending on the EM1206 version, the magnetics connector can be soldered facing up or down, as described in the Mechanical Dimensions topic.


A diagram illustrating the pin assignments of the EM1206.

Main Connector

Pin #

Function

Description

1

VCCB

Backup power for the real-time counter.

Do not connect to 3.3V directly!

2

MD

Mode selection pin.

3

RST

Reset line, active high.

4(1,2,3)

GPIO5/P0.5/TX2/INT5

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

TX, W1, dout output of the serial port 2;

Interrupt line 5.

5(1,2,3)

GPIO4/P0.4/RX2/INT4

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

RX, W1, din input of the serial port 2;

Interrupt line 4.

6(1,2,3)

GPIO6/P0.6/RX3/INT6

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

RX, W1, din input of the serial port 3;

Interrupt line 6.

7(1,2,3)

GPIO7/P0.7/TX3/INT7

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

TX, W1, dout output of the serial port 3;

Interrupt line 7.

8

VCC

Positive power input, 3.3V nominal, ±5%, max. current consumption 230mA (100BaseT, PLL on).

9

GND

System ground.

10(1,2,3)

GPIO0/P0.0/RX0/INT0

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

RX, W1, din input of the serial port 0;

Interrupt line 0.

11(1,2,3)

GPIO1/P0.1/TX0/INT1

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

TX, W1, dout output of the serial port 0;

Interrupt line 1.

12(1,2,3)

GPIO2/P0.2/RX1/INT2

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

RX, W1, din input of the serial port 1;

Interrupt line 2.

13(1,2,3)

GPIO3/P0.3/TX1/INT3

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

TX, W1, dout output of the serial port 1;

Interrupt line 3.
  1. This line is 5V-tolerant and can be interfaced to 5V CMOS devices directly.
  2. This line can serve as an RTS/Wout/cout line of a serial port (provided that this does not interfere with any other function).
  3. This line can serve as a CTS/W0&1in/cin line of a serial port (provided that this does not interfere with any other function).

Additional Connector

Pin #

Function

Description

1

SG

Green status LED control line.

2

SR

Red status LED control line.

3(1,2)

GPIO16/CO

General-purpose I/O line 16 (does not belong to any port);

square wave output line.

4(1,2)

GPIO8/P1.0

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

5(1,2)

GPIO9/P1.1

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

6(1,2)

GPIO10/P1.2

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

7(1,2)

GPIO11/P1.3

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

8(1,2)

GPIO12/P1.4

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

9(1,2)

GPIO13/P1.5

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

10(1,2)

GPIO14/P1.6

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

11(1,2)

GPIO15/P1.7

General-purpose I/O line 15 (P1.7).
  1. This line is 5V-tolerant and can be interfaced to 5V CMOS devices directly.
  2. This line can be assigned to serve as an RTS/Wout/cout line of a serial port.

Magnetics Connector

Pin #

Function

Description

1

RX+

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

2

RX–

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

3

AVCC

"Clean" 1.8V power output for magnetics circuitry.

4

---

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5

---

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6

AGND

Analog ground.

7

TX+

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

8

TX–

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

Additional Resources

See these topics for more information on various hardware facilities of the EM1206:


Detailed Device Info

Main Connector

Additional Connector

Magnetics Connector

Additional Resources