Detailed Device Info

em2001-pin-assignment

Note: "SPI connector" is now referred to as "wireless add-on port"

See these topics for more information on various hardware facilities of the EM2001:

I/O pin assignment

Notes (refer to superscript numbers placed after pin #):

  1. This line is 5V-tolerant and can be interfaced to 5V CMOS devices directly.
  2. This line can be mapped to serve as an RTS, W0 output, or CLOCK output line of a serial port. The line can also be assigned to an I2C/SPI channel, or act as an interface line of the Wi-Fi add-on module, keypad, or an LED control channel.  
  3. This line can serve as a CTS, W0&1 input, or CLOCK input line of a serial port.

Pin #

Function

Description

1 (1,2)

GPIO0/P0.0/RTS0

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

2 (1,2)

GPIO1/P0.1/RTS1

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

3 (1,2)

GPIO2/P0.2/RTS2

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

4 (1,2)

GPIO3/P0.3/RTS3

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

5 (1,2)

GPIO4/P0.4/DTR0

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

6 (1,2)

GPIO5/P0.5/DTR1

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

7 (1,2)

GPIO6/P0.6/DTR2

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

8 (1,2)

GPIO7/P0.7/DTR3

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

9 (1,2)

GPIO8/P1.0/RX0

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

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

10 (1,2)

GPIO9/P1.1/TX0

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

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

11 (1,2)

GPIO10/P1.2/RX1

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

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

12 (1,2)

GPIO11/P1.3/TX1

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

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

13 (1,2)

GPIO12/P1.4/RX2

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

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

14 (1,2)

GPIO13/P1.5/TX2

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

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

15 (1,2)

GPIO14/P1.6/RX3

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

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

16 (1,2)

GPIO15/P1.7/TX3

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

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

17 (1,2,3)

GPIO16/P2.0/INT0/CTS0

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

interrupt line 0.

18 (1,2,3)

GPIO17/P2.1/INT1/CTS1

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

interrupt line 1.

19 (1,2,3)

GPIO18/P2.2/INT2/CTS2

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

interrupt line 2.

20 (1,2,3)

GPIO19/P2.3/INT3/CTS3

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

interrupt line 3.

21 (1,2,3)

GPIO20/P2.4/INT4/DSR0

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

interrupt line 4.

22 (1,2,3)

GPIO21/P2.5/INT5/DSR1

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

interrupt line 5.

23 (1,2,3)

GPIO22/P2.6/INT6/DSR2

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

interrupt line 6.

24 (1,2,3)

GPIO23/P2.7/INT7/DSR3

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

interrupt line 7.

25 (1,2)

GPIO40/ADC0

General-purpose I/O line 40 (does not belong to any 8-bit port); ADC input 0.

26 (1,2)

GPIO41/ADC1

General-purpose I/O line 41 (does not belong to any 8-bit port); ADC input 1.

27 (1,2)

GPIO42/ADC2

General-purpose I/O line 42 (does not belong to any 8-bit port); ADC input 2.

28 (1,2)

GPIO43/ADC3

General-purpose I/O line 43 (does not belong to any 8-bit port); ADC input 3.

29

GND

System ground.

30 (1,2)

GPIO44

General-purpose I/O line 44 (does not belong to any 8-bit port).

31 (1,2)

GPIO25/P3.1

General-purpose I/O line 25 (P3.1).

32 (1,2)

GPIO24/P3.0

General-purpose I/O line 24 (P3.0).

33 (1,2)

GPIO27/P3.3

General-purpose I/O line 27 (P3.3).

34 (1,2)

GPIO26/P3.2

General-purpose I/O line 26 (P3.2).

35 (1,2)

GPIO29/P3.5

General-purpose I/O line 29 (P3.5).

36 (1,2)

GPIO28/P3.4

General-purpose I/O line 28 (P3.4).

37 (1,2)

GPIO31/P3.7

General-purpose I/O line 31 (P3.7).

38 (1,2)

GPIO30/P3.6

General-purpose I/O line 30 (P3.6).

39 (1,2)

GPIO33/P4.1

General-purpose I/O line 33 (P4.1).

40 (1,2)

GPIO32/P4.0

General-purpose I/O line 32 (P4.0).

41 (1,2)

GPIO35/P4.3

General-purpose I/O line 35 (P4.3).

42 (1,2)

GPIO34/P4.2

General-purpose I/O line 34 (P4.2).

43 (1,2)

GPIO37/P4.5

General-purpose I/O line 37 (P4.5).

44 (1,2)

GPIO36/P4.4

General-purpose I/O line 36 (P4.4).

45 (1,2)

GPIO39/P4.7

General-purpose I/O line 39 (P4.7).

46 (1,2)

GPIO38/P4.6

General-purpose I/O line 38 (P4.6).

47

MD

Mode selection pin.

48 (1,2)

GPIO55

General-purpose I/O line 55 (does not belong to any 8-bit port).

49

RST

Reset line, active high.

50 (1,2)

GPIO54

General-purpose I/O line 54 (does not belong to any 8-bit port).

51

SR

Red status LED control line.

52

SG

Green status LED control line.

53 (1,2)

GPIO46

General-purpose I/O line 46.

54 (1,2)

GPIO45/CO

General-purpose I/O line 45 (does not belong to any 8-bit port);

square wave output line.

55 (1,2)

GPIO48

General-purpose I/O line 48 (does not belong to any 8-bit port).

56 (1,2)

GPIO47

General-purpose I/O line 47 (does not belong to any 8-bit port).

57

DBGRX

RX line of debug serial port.

58

3.3V

Direct 3.3V power input or 3.3V power output if you are supplying 12V power via a power jack or VIN pin.

59

DBGTX

TX line of debug serial port.

60

VIN (12V NOM.)

12V (nominal) power input to the onboard power regulator. Acceptable input voltage range is 8-20V.

61

GND

Wireless add-on port, ground line.

62

VCC

Wireless add-on port, 3.3V power output for the wireless add-on module.

63 (1,2)

GPIO49

Wireless add-on port, general-purpose I/O line 49 (does not belong to any 8-bit port).

64

<N.C.>

Leave this pin unconnected.

65 (1,2)

GPIO50

Wireless add-on port, general-purpose I/O line 50 (does not belong to any 8-bit port).

66

<N.C.>

Leave this pin unconnected.

67 (1,2)

GPIO51

Wireless add-on port, general-purpose I/O line 51 (does not belong to any 8-bit port).

68

<N.C.>

Leave this pin unconnected.

69 (1,2)

GPIO52

Wireless add-on port, general-purpose I/O line 52 (does not belong to any 8-bit port).

70 (1,2)

GPIO53

Wireless add-on port, general-purpose I/O line 53 (does not belong to any 8-bit port).