ETRX357LR Telegesis Ltd, ETRX357LR Datasheet - Page 12

• Manufacturer Part Number: ETRX357LR
• Description: MODULE ZIGBEE W/PA LNA CHIP ANT
• Manufacturer: Telegesis Ltd

Specifications of ETRX357LR

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: ISM
• Power - Output: 18dBm
• Sensitivity: -105dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 28mA
• Current - Transmitting: 106mA
• Data Interface: PCB, Surface Mount
• Memory Size: 192kB Flash, 12kB RAM
• Antenna Connector: On-Board, Chip
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 920-1007-2

ETRX351 AND ETRX357
5 Firmware Description
The modules will be pre-loaded with a standalone bootloader which supports over-the-air
bootloading as well as serial bootloading of new firmware.
In order to enter the standalone bootloader using a hardware trigger pull PA5 to ground and
power-cycle the module. To avoid entering the standalone bootloader unintentionally make sure
not to pull this pin down during boot-up unless the resistance to ground is >10kΩ. (A pull-up is not
required).
In addition to the standalone bootloader the modules also contain the current release of the
Telegesis AT-style command interface as described in the Telegesis AT command dictionary and
the Telegesis user guide. Check www.telegesis.com for updates. Each module comes with a
unique 64-bit 802.15.4 identifier which is stored in non-volatile memory. The commands and
responses pass through the serial port of the ETRX35x as ASCII text, so a simple terminal
application will usually suffice. We provide Telegesis Terminal but it is not an essential feature.
The pre-loaded AT-style command interface firmware is based on the latest EmberZNet meshing
stack which implements routers/coordinators as well as (sleepy) end devices. [End devices have
no routing responsibility and therefore are allowed to go to sleep, whilst still being able to send and
receive messages via a parent router. In addition to a classical (sleepy) end device the module
firmware also supports mobile (sleepy) end devices capable of changing their parent quickly
whenever they change their position within the network.]
A router is typically a mains powered device whilst a sleepy end device (SED) can be battery
powered.
The module is also able to act as a PAN coordinator and Trust Centre through external host
control. The AT style command line supplies all the tools required to set up and manage a ZigBee
network by allowing easy access to the low-level functionality of the stack.
The Telegesis firmware uses the meshing and self healing EmberZNet PRO stack to overcome
many of the limitations of the tree network topology of the ZigBee® 2006 stack by using the ZigBee
PRO featureset.
The Telegesis firmware also allows low-level access to physical parameters such as channel and
power level. Parameters that define the functionality of the ETRX35x module and also allow
standalone functionality are saved in non-volatile memory organised in so-called S-Registers. The
SPI and I2C buses are not supported by the current firmware release, but can be used with custom
firmware.
5.1 Custom Firmware
For high volume customers the firmware can be customised on request. Customers can use the
ETRX35x module as hardware only and develop their own firmware based on the EmberZNet
stack.
In order to develop custom firmware Insight Desktop™ is required together with a
comprehensive integrated development environment (IDE) and C-language compiler toolchain
from Ember.
©2009 Telegesis (UK) Ltd
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ETRX35x Preliminary Product Manual