ETRX2HR-PA Telegesis Ltd, ETRX2HR-PA Datasheet - Page 5

• Manufacturer Part Number: ETRX2HR-PA
• Description: MODULE
• Manufacturer: Telegesis Ltd

Specifications of ETRX2HR-PA

• Module Applications: AMR, Building Automation, Wireless Sensor Network, M2M Industrial Controls
• Mcu Supported Families: EM250
• Processor Type: EM250
• Wireless Protocol: IEEE 802.15.4
• Data Rate: 250Kbps
• Module Interface: I2C, SPI, UART
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ETRX2PA
1 Introduction
This document describes the Telegesis ETRX2-PA ZigBee® module which has been designed to
be integrated into another device and to provide a fast, simple and low cost wireless mesh
networking interface. Unless clearly indicated, its contents also apply to the ETRX2HR-PA module
with a Hirose U.FL coaxial antenna connector in place of the on-board ceramic antenna. The user
cannot convert an ETRX2-PA into an ETRX2HR-PA or vice-versa.
The Telegesis ETRX2-PA module is based on the Ember ZigBee® platform consisting of the single
chip EM250 combined with the ZigBee PRO compliant EmberZNet meshing stack. Integration into
a wide range of applications is made easy using a simple AT style command interface and
advanced hardware design.
The configurable functionality often allows the ETRX2-PA wireless meshing module to be used
without an additional host microcontroller saving even more integration time and costs. In addition
to the Telegesis AT Commandset, the ETRX2-PA can be used in with custom build firmware or the
Ember EZSP over UART protocol interface...
No RF experience or expertise is required to add this powerful wireless networking capability to
your products. The ETRX2-PA offers fast integration opportunities and the shortest possible time
to market for your product.
1.1 Hardware Description
The main building blocks of the ETRX2-PA are the single chip EM250 from Ember, a 24MHz
reference crystal and RF front-end circuitry optimized for best RF performance. With single ended
RF output, the module is available with integrated antenna or 50Ω U.FL coaxial connector or 50Ω
pad terminal on the bottom of the module.
The integrated antenna is a Johanson 2450AT43A100, and details of the radiation pattern etc are
available from their website [4].
Compared to the ETRX2, the ETRX2-PA module allows extended range of operation by means of
an integrated high efficiency power amplifier inserted in the Tx path.
A low loss LTCC band-pass filter for the 2.4GHz ISM band is added to both the Tx and Rx path.
As a result for Rx mode the immunity against interferers (for example operating at 1.8 GHz) is
improved compared to the standard ETRX2.
The ETRX2-PA is used for ZigBee®
(www.zigbee.org)
applications. If you wish to create your own
custom firmware, and not use the pre-loaded Telegesis AT-Command interface, you will need the
InSight toolchain, consisting of InSight Desktop™ together with a comprehensive integrated
development environment (IDE) and C-language compiler toolchain from Ember. The Ember
firmware is not suitable for an 802.15.4-only application that does not use the ZigBee layer.
As an alternative to the Telegesis R2xx and R3xx series AT Command interfaces, the ETRX2-PA
can also be supplied with Ember’s UART EZSP (Ember ZigBee Serial Protocol) firmware. Please
refer to the Ember EM260 manual for more information on the EZSP.
©2009 Telegesis (UK) Ltd
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ETRX2PA Product Manual (Rev 1.07)