First ZigBee module based on new 32bit ARM® Cortex-M3 processor


Marlow, U.K. — (METERING.COM) — June 11, 2009 – ETRX3, the third generation of advanced ZigBee modules from ZigBee specialist Telegesis and the first module on the market to feature the latest ARM® Cortex M-3 based EM357 SOC from Ember, has been released.
The ETRX3 has a footprint of just 19 mm x 25 mm for both standard and PA/LNA versions and will be available with either an on-board antennae or a Hirose U.FL connector to allow connection of external antennae.
The new ETRX3 family supplements the ETRX2 module range introduced in 2007, which has been used in many high volume applications including metering and smart energy applications.
The EM357 SOC used in the ETRX3 is a fully integrated 2.4 GHz IEEE 802.15.4 ZigBee transceiver based on a 32 bit ARM Cortex M-3 core, which exceeds the dynamic range of requirements imposed by the 802.15.4 spec by over 15 dB.

The high performance and low power of the ARM Cortex core makes it an ideal choice for low power, battery operated applications such as ZigBee. The ETRX3 follows the Telegesis philosophy of offering fully tested and approved ZigBee solutions, allowing designers to easily add ZigBee functionality to a design without the need for RF design experience or embedded code.

The module works from a 2.1 V to 3.6 V supply and active power consumption is reduced by over 20 percent compared to the ETRX2. In deep sleep mode, current consumption is reduced to 800 nA and further reduced to 400 nA if the self wakeup feature is not enabled.  

A link budget of 105 dB on the standard ETRX3 module gives excellent performance and RF power can be further boosted by use of the ETRX3-PA which adds an extra LNA+PA boosting the link budget to 123 dB.

The ETRX3 features all the advanced software already present on other Telegesis ZigBee modules such as the Telegesis AT command set, which allows the designer to use the functionality of the EmberZNet stack without the need for complex embedded code. Development is also made easier by the addition of an integrated JTAG and debugging interface.

“The ETRX3 is a major milestone for Telegesis,” commented business development manager Ollie Smith. “We’ve designed this new range for demanding applications such as metering and smart energy applications and being first to market with a module solution based on this world beating new SOC from Ember keeps Telegesis at the forefront of the ZigBee module business”.