XECOM XE900 Datasheet

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Preliminary

XE900

October 2002

XE900 900 MHz Smart Transceiver for Base Access System

Description

Xecom combines a micro-controller and a 900 MHz transceiver to create the XE900, Smart Transceiver. The XE900 can communicate with another Smart Transceiver or with Xecom’s XE924 Base Access Point. The Base Access Point connects multiple remote systems to a single dial-up telephone line. The XE900 supplies wireless connectivity through an easy-to-use serial component.

Integrating the XE900 Smart Transceiver is as easy as integrating a serial modem into your system. The XE900 interfaces to the system host through a TTL level serial interface. The designer controls the wireless link by manipulating modem-like AT commands provided in the Smart Transceiver.

The XE900 offers a great number of wireless system options from simple point-to-point communication between Smart Transceivers to the complete Base Access Network which provides multi-point wireless communication and Dial-up modem operation.

Features

*Small Size: 2.75” by 1.38: by 0.42”

*Control and Configuration of the Wireless Link modem-like AT Commands.

*Wireless Carrier Frequency 916.48 MHz on ISM Band

*Wireless Range; maximum 150 Feet

*Wireless Data Rate 9600 BPS, half-duplex

*Integrated communications controller regulates the wireless communications protocols, error correction and controls the wireless link to the modem.

*FCC Part 15 Compliance

900MHz Smart Transceiver Applications

Point to Point Wireless Connection

System Host

 

System A

 

XE900

Micro-Controller

 

 

 

Equipped

 

 

 

 

 

System B

System Host

 

XE900

Micro-Controller

 

 

Equipped

 

 

900MHz Base Access System

System A

XE900

Equipped

System B

XE924

XE900

Base Access

Equipped

Point

System C

Dial-up

XE900

Telephone

Equipped

Line

 

XECOM

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XE900

XE900 MECHANICAL SPECIFICATIONS

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E

L

 

K

H

J

 

A

C

(Top View)

Pin 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inches

 

 

 

MM

 

 

 

 

 

 

 

 

 

 

 

 

PIN

MIN

MAX

 

MIN

MAX

A

2.740

2.760

69.60

70.10

B

0.550

0.560

13.97

14.22

C

1.370

1.390

34.80

35.31

D

5.300

0.510

13.46

12.95

E

2.490

2.510

63.25

63.37

F

0.090

0.110

2.29

2.79

G

0.115

0.135

2.92

3.43

H

1.190

1.210

30.23

30.73

J

0.130

0.150

3.30

3.81

K

0.220

0.240

5.59

6.10

L

0.300

0.320

7.62

8.13

 

 

 

 

 

 

 

 

 

 

 

Pin Description:

Pins are gold plated

Pin Dimensions .025 inches square, .minimum 090 inches long

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XE900

XECOM XE900 Datasheet

XE900 BLOCK DIAGRAM

Antenna

 

 

ROM

 

Comm

 

Controller

900 MHz

TTL Level

Transceiver

RS232C

 

 

Interface

XE900 BLOCK DIAGRAM

RGND

1

XE900

52

RGND

RESERVED

2

51

RESERVED

RGND

3

 

50

RGND

RESERVED

4

 

49

RESERVED

RGND

5

 

48

RGND

RESERVED

6

 

47

RESERVED

RGND

7

 

46

RGND

RESERVED

8

 

45

RESERVED

RGND

9

 

44

RGND

RGND

10

 

43

RGND

RESERVED

11

 

42

RF_PDN

RESERVED

12

 

41

RF_TXDATA

RESERVED

13

 

40

RF_RXDATA

VDD

14

 

39

RGND

DGND

15

 

38

/CTS

/RST_VPP

16

 

37

RESERVED

VCC

17

 

36

/DCD

RA3

18

 

35

RESERVED

/DSR

19

 

34

/DTR

RESERVED

20

 

33

RESERVED

RXD

21

 

32

/RTS

RESERVED

22

 

31

RESERVED

TXD

23

 

30

RESERVED

RESERVED

24

 

 

 

/RI

25

 

28

RESERVED

RESERVED

26

 

27

RESERVED

 

 

 

 

 

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XE900

XE900 PIN CONFIGURATION

 

SIGNAL

PINS

DESCRIPTION

 

RGND

1, 3, 5, 7, 9, 10,

RGND provides the common reference point for all high

 

 

11, 12, 13, 39, 43,

frequency signals.

 

 

44, 46,48, 50, 52

 

 

RESERVED

2, 4, 6, 8, 20, 22

These pins are reserved for future use. No connections

 

 

24, 26, 27, 28,

should be made to these pins.

 

 

30, 31, 33, 35,

 

 

 

37, 45, 47, 49, 51

 

 

VDD

14

VDD provides power to the 900 MHz transceiver.

 

DGND

15

DGND provides the ground reference for the modem and

 

 

 

communications controller circuitry in the XE900.

 

RST_PV

16

RST_PV provides a hardware reset line for the XE900’s

 

 

 

communications controller.

 

VCC

17

VCC provides power to the communications controller and

 

 

 

modem circuitry.

 

RA3

18

Programmable I/O pin from the embedded communications

 

 

 

controller. Register TRISA determines if RA3 will act as

 

 

 

an input or output pin.

 

/DSR

19

/DSR supplies the Data Set Ready output from the XE900.

 

 

 

DSR is an active low output.

 

RXD

21

/RXD is the serial data output from the XE900. A Mark

 

 

 

condition on /RXD is active low.

 

/TXD

23

/TXD is the serial data input to the XE900. A Mark condition

 

 

 

on /RXD is active low.

 

/RI

25

/RI is an active low output which indicates that a wireless link

 

 

 

has been requested.

 

NO PIN

29

This pin is intentionally removed.

 

/RTS

32

/RTS is an active low input to the XE900. It can be use to

 

 

 

stop the flow of data from the XE900 to the host. When /RTS

 

 

 

is inactive the XE900 will not pass data to the host.

 

/DTR

34

/DTR connects to the Data Terminal Ready line from the host.

 

 

 

It is an active low input to the XE900.

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XE900

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