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PDF ( 数据手册 , 数据表 ) XE900S-500

零件编号 XE900S-500
描述 Smart Spread Spectrum Transceiver
制造商 Xecom
LOGO Xecom LOGO 


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XE900S-500 数据手册, 描述, 功能
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XE900S-500
June 2005
XE900S-500 Smart Spread Spectrum Transceiver
Description
The XE900S-500 combines a spread spectrum
transceiver and micro-controller in a single, easy-to-
use, FCC Part 15 Registered module. The embedded
communications controller manages the Frequency
Hopping Spread Spectrum (FHSS) link and the host
system interface.
The XE900S-500 supports two unique features to
simplify wireless networking. Count-Off™ allows the
network master to quickly retrieve the status of 125
remote nodes with a single broadcast command.
SensorOnAirTM eliminates the need for an application
controller by utilizing the communications controller to
directly manage analog inputs and digital control lines.
Xecom also offers a low power spread spectrum model,
the XE900SL10, for applications that require less range.
The XE900SL10 has an obstructed range of 300 feet but
is smaller, costs less and uses significantly less power.
Features
* Small Size: 1.295” by 1.410” by 0.255”
* Serial Control and Configuration of the Wireless Link.
* Supports a 254 node point-to-multipoint network
* Programmable Transmit Power Output 100 to 500 mW.
* Typical Receiver Sensitivity -100 dBm
* Obstructed signal range to 1000 feet;
* Wireless Data Rate 76.8K bps, half-duplex
* Low power Consumption
XE900S-500: 1000 mA@ 3.3 Volts; when transmitting
at 500 mW output power; less than 1 mA of current
flows in Sleep Mode or Power-Down modes
* SensorOnAirTM (patent pending) allows direct
connection of sensors to the Smart Transceiver
* Count-OffTM (patent pending) allows the host node to
download the status of all nodes in under 10 seconds.
* Operating Temperature Range of -40 to +85 C
* FCC Part 15 Registered
Antenna
XE900S-500 Block Diagram
SAW
FILTER
ROM
MUX
TRANSCEIVER
AMP
SAW
FILTER
COMM.
CONTROLLER
Serial I/F
Ana log
Inputs
Digital I/O
XECOM
(1) XE900S-500







XE900S-500 pdf, 数据表
XE900S-500 COMMUNICATIONS CONTROLLER
The XE900S-500 uses an internal micro-controller to
control communications. This micro-controller manages
the interface to the host system, determines when the
communications link is available, and formats data for
the RF communications.
HOSTINTERFACE
The XE900S-500 has two primary interfaces to the system
host; the serial interface and the direct sensor interface
supported by the SensorOnAir™ feature. Management
of both interfaces is the responsibility of the
communications controller.
RS232 Interface
The XE900S-500 supports a 4-signal serial interface. For
most applications the XE900S-500 will act as a DCE. Control
and configuration of the XE900S-500 takes place through
the serial interface using modem-like AT commands. The
serial data rate is configurable from 1200 bits per second
to 115.2K bits per second. The supported serial interface
signals are listed below.
/TXD - Transmit Data; the input to the XE900S-500 for
AT commands and Data to be transmitted on the
wireless network.
/RXD - Received Data; the output from the XE900S-500
for received RF data and responses to AT
commands.
/RTS -
Request to Send, provides the hardware flow
control input to the XE900S-500. The DTE
removes RTS to stop the XE900S-500 from
sending more data on the RXD line.
/CTS - Clear to Send, is the hardware flow control output
from the XE900S-500. The XE900S-500
deactivates Clear to Send to advise then host to
stop inputting data on the TXD lead.
XE900S-500AT Command Format
AT commands issued to the XE900S-500 follow a strict
format. Each command begins with the prefix AT and
ends with a carriage return. The XE900S-500
communications controller accepts commands at data
rates from 1200 to 115,200 bps. The default serial data
rate is 9600 bps and can be changed using register S23.
The communications controller uses the AT command
prefix to automatically determine the parity of the
incoming characters.
Command Prefix - Each command, except the A/
command, begins with the AT prefix. The "A" and "T"
may be either both upper case or both lower case but
cannot be of different cases. The prefix identifies parity of
the commands sent to the XE900S-500 by comparing the
parity bits of the "A" and the "T" characters.
Command Line - Commands may be strung together in a
single command line of up to 30 characters. Commands in
the command string are executed in the sequence they
appear.
Omitted Parameters - Most commands include a
parameter which determines the function setting. When
the command parameter is omitted from the command
string, it is assumed to be a 0.
Result Codes - A result code is normally issued after each
action. Result codes may be provided as full words, one
or two digit numeric codes, or may be disabled all
together. Each result code ends with a carriage return
when numeric result codes are chosen. When full word
result codes are chosen, a Line Feed and Carriage Return
precede and follow each result code.
Disconnect Sequence - A three character sequence
initiates a disconnect of the wireless link. The sequence
“~~~” is assigned to disconnect the link.
DIRECT CONNECTION OF SENSORS:
SensorOnAir
Sensors can be connected directly to the XE900S-500
without requiring an applications controller. In this
SensorOnAir™ configuration the XE900S-500
communications controller controls the operation of the
sensors.
Sensor I/O Lines
SensorOnAir controls the operation of 6 I/O lines to the
XE900S-500. This includes 2 analog inputs, ADC0 and
ADC1, and 4 digital I/O lines, DIO0, DIO1, DIO2, and DIO3.
ADC0 andADC1 are connected to a 12-bit analog to digital
converter and use a 2.5 volt reference derived from VCC
as their reference voltage. The digital I/O lines can be
programmed to act as either inputs or outputs.
XECOM
(8) XE900S-500







XE900S-500 equivalent, schematic
Terms of Sale
Devices sold by XECOM are covered by the warranty provisions appearing in its Terms of Sale only. XECOM makes no war-
ranty, express, statutory, implied, or by description regarding the information set forth herein, or regarding the freedom of the de-
scribed devices from patent infringement. XECOM makes no warranty of merchantability or fitness for any purposes.
XECOM reserves the right to discontinue production and change specifications and prices at any time and without notice. This
product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual envi-
ronmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment, are
specifically not recommended without additional processing and authorization by XECOM for such application.
Xecom assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xecom product. No other cir-
cuits, patents, or licenses are implied.
Life Support Policy
Xecom's products are not authorized for use as Critical Components in Life Support Devices or Systems.
Life Support Devices or Systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) sup-
port or sustain life, and whose failure to perform, when properly used in accordance with instructions provided in the labeling,
can be reasonably expected to result in significant injury to the user.
A Critical Component is any component of a life support device or system whose failure to perform can be reasonably ex-
pected to cause failure of the life support device or system, or to affect its safety or effectiveness.
Copyright, Xecom © 2005
While Xecom, Inc. has made every effort to ensure that the information presented here is accurate, Xecom will not be liable for any damages arising from errors or
omission of fact. Xecom reserves the right to modify specifications and/or prices without notice. Product mentioned herein are used for identification purposes
only and may be trademarks and/or registered trademarks of their respective companies.
XECOM
Xecom Incorporated
374 Turquoise Street, Milpitas, CA 95035
Ph:408-942-2200 Fax:408-942-1346 E-Mail: [email protected]
(16) XE900S-500










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