XECOM XE900 Datasheet

XECOM (1) XE900

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

Preliminary

System A

XE900

Equipped

XE924

Base Access

Point

Dial-up

Telephone

Line

System B

XE900

Equipped

System C

XE900

Equipped

900MHz Smart Transceiver Applications

900MHz Base Access System

Point to Point Wireless Connection

System A

XE900

Equipped

System B

XE900

Equipped

System Host

Micro-Controller

System Host

Micro-Controller

XECOM (2) XE900

XE900 MECHANICAL SPECIFICA TIONS

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

A

B

C

D

E

FG

H

J

K

L

(Top View)

Pin 1

XECOM (3) XE900

XE900 BLOCK DIAGRAM

XE900 BLOCK DIAGRAM

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30

28
27

XE900

RGND

RESERVED

RGND

RESERVED

RGND

RESERVED

RGND

RESERVED

RGND

RGND
RESERVED
RESERVED
RESERVED

VDD

DGND

/RST_VPP

VCC

RA3

/DSR

RESERVED

RXD

RESERVED

TXD

RESERVED

/RI

RESERVED

RGND
RESERVED
RGND
RESERVED
RGND
RESERVED
RGND
RESERVED
RGND
RGND
RF_PDN
RF_TXDATA
RF_RXDATA
RGND
/CTS
RESERVED
/DCD
RESERVED
/DTR
RESERVED
/RTS
RESERVED
RESERVED

RESERVED
RESERVED

Comm

Controller

ROM

900 MHz

Transceiver

Antenna

TTL Level
RS232C
Interface

XECOM (4) 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.