Silicon Laboratories Finland EM35XB ETRX3 Series Long Range Modules User Manual ETRX357 LR Product Manual

Telegesis

TG-ETRX35X-LRS-PM-015-100

ETRX351-LRS and ETRX357-LRS

Preliminary Product Manual

ETRX35x-LRS ZIGBEE® MODULES

PRODUCT MANUAL

ETRX351-LRS and ETRX357-LRS

Table of Contents

1 INTRODUCTION ................................................................................................................. 5

1.1 Hardware Description ....................................................................................................... 5

2 PRODUCT APPROVALS ................................................................................................... 6

2.1 FCC Approvals ................................................................................................................. 6

2.1.1 FCC Labelling Requirements ........................................................................................... 7

2.2 IC (Industry Canada) Approvals ....................................................................................... 7

2.3 European Certification ...................................................................................................... 8

2.4 Declarations of Conformity ............................................................................................... 9

2.5 IEEE 802.15.4 .................................................................................................................. 9

2.6 The ZigBee® Protocol ....................................................................................................... 9

3 MODULE PINOUT ............................................................................................................ 10

4 HARDWARE DESCRIPTION ............................................................................................ 12

4.1 Hardware Interface ......................................................................................................... 12

5 FIRMWARE DESCRIPTION ............................................................................................. 13

5.1 Custom Firmware ........................................................................................................... 13

5.2 Boost Mode vs. Normal Mode ........................................................................................ 14

5.3 Software Interface .......................................................................................................... 14

6 ABSOLUTE MAXIMUM RATINGS ................................................................................... 15

7 RECOMMENDED OPERATING CONDITIONS ................................................................ 15

8 DC ELECTRICAL CHARACTERISTICS ........................................................................... 16

9 DIGITAL I/O SPECIFICATIONS ....................................................................................... 17

10 A/D CONVERTER CHARACTERISTICS .......................................................................... 18

11 AC ELECTRICAL CHARACTERISTICS ........................................................................... 18

11.1 TX Power Characteristics ............................................................................................... 20

11.2 Power Settings for Regulatory Compliance .................................................................... 21

12 PHYSICAL DIMENSIONS ................................................................................................. 22

13 SOLDERING TEMPERATURE TIME PROFILE (FOR REFLOW SOLDERING) .............. 23

13.1 For Leaded Solder ......................................................................................................... 23

13.2 For Lead-free Solder ...................................................................................................... 23

14 PRODUCT LABEL DRAWING ......................................................................................... 24

15 RECOMMENDED FOOTPRINT ........................................................................................ 25

15.1 Example carrier board .................................................................................................... 26

16 RELIABILITY TESTS ........................................................................................................ 27

17 APPLICATION NOTES ..................................................................................................... 27

ETRX351-LRS and ETRX357-LRS

17.1 Safety Precautions ......................................................................................................... 27

17.2 Design Engineering Notes .............................................................................................. 27

17.3 Storage Conditions ......................................................................................................... 28

18 PACKAGING .................................................................................................................... 29

18.1 Embossed Tape ............................................................................................................. 29

18.2 Component Orientation .................................................................................................. 30

18.3 Reel Dimensions ............................................................................................................ 30

18.4 Packaging ...................................................................................................................... 30

19 ORDERING INFORMATION ............................................................................................. 31

20 TRADEMARKS ................................................................................................................. 32

21 DISCLAIMER .................................................................................................................... 32

22 ROHS DECLARATION ..................................................................................................... 32

23 DATA SHEET STATUS .................................................................................................... 32

24 LIFE SUPPORT POLICY .................................................................................................. 32

25 RELATED DOCUMENTS ................................................................................................. 33

26 CONTACT INFORMATION ............................................................................................... 33

ETRX351-LRS and ETRX357-LRS

The Telegesis ETRX351-LRS and ETRX357-LRS modules are

low power 2.4GHz ZigBee® modules with an added frontend

module (FEM) containing both PA and LNA for highest possible

link budget.

Based on the latest Ember EM351 and EM357 single chip

ZigBee® solution the new long range modules are footprint

compatible with the ETRX351 and ETRX357, thus representing

a drop-in replacement for all applications where a high link

budget is required.

The module‟s unique AT-style command line interface allows

designers to quickly integrate ZigBee technology without

complex software engineering. For custom application

development the ETRX35x series integrates with ease into

Ember‟s InSight development environment.

Image not shown actual size; enlarged to show detail.

Module Features

Small form factor, SMT module 25mm x 19mm

Side Castellations for easy soldering and inspection

2 antenna options: Integrated chip antenna or U.FL

coaxial connector

Industry‟s first ARM® Cortex-M3 based family of ZigBee

modules

Industry standard JTAG Programming and real time

network level debugging via the Ember InSight Port

192kB (ETRX357-LRS) and 128kB (ETRX351-LRS)

flash and 12kbytes of RAM

Lowest Deep Sleep Current of sub 1µA and multiple

sleep modes

Ultra Wide supply voltage range (2.1 to 3.6V)

32.768kHz watch crystal can be added externally

Module ships with standard Telegesis AT-style

command interface based on the ZigBee PRO feature

set

Can act as an End Device, Router or Coordinator

22 general-purpose I/O lines including analogue inputs

Firmware upgrades via serial port or over the air

(password protected)

Hardware supported encryption (AES-128)

CE and FCC compliance, FCC modular approval

Operating temperature range: -40°C to +85°C

Standard version without LNA and PA available in the

same form factor

Radio Features

Based on the Ember EM351 and EM357 single chip

ZigBee® / IEEE802.15.4 solutions

2.4GHz ISM Band

250kbit/s over the air data rate

16 channels (IEEE802.15.4 Channel 11 to 26)

+20dBm output power (adjustable down to -41dBm)

High sensitivity of -106dBm typ. @ 1% packet error rate

RX Current: 33mA, TX Current: approx 140mA at

20dBm

Robust Wi-Fi and Bluetooth coexistence

Suggested Applications

AMR – ZigBee Smart Energy applications

Wireless Alarms and Security

Home/Building Automation

Wireless Sensor Networks

M2M Industrial Controls

Lighting and ventilation control

Remote monitoring

Environmental monitoring and control

Development Kit

New Development kit containing everything required to

set up a mesh network quickly and evaluate range and

performance of the ETRX35x and its long range

version.

AT-style software interface command dictionary can be

modified for high volume customers.

Custom software development available upon request.

Example AT-Style Commands

AT+BCAST Send a Broadcast

AT+UCAST:<address> Send a Unicast

AT+EN Establish PAN network

AT+JN Join PAN

At power-up the last configuration is loaded from non-

volatile S-Registers, which can eliminate the need for an

additional host controller.

ETRX351-LRS and ETRX357-LRS

1 Introduction

This document describes the Telegesis ETRX351-LRS and ETRX357-LRS ZigBee® long range

modules which have been designed to be easily integrated into another device and to provide a

fast, simple and low cost wireless mesh networking interface.

The Telegesis ETRX3 series modules are based on the Ember ZigBee® platform consisting of the

single chip EM351 or EM357 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 of the Telegesis AT Commandset often allows the ETRX3 series

ZigBee modules to be used without an additional host microcontroller saving even more integration

time and costs. In addition to the Telegesis AT Commandset, the ETRX351-LRS and ETRX357-

LRS modules can be used with custom-built firmware and they represent an ideal platform for

custom firmware development in conjunction with the Ember development kits. The ETRX3 series

shares the same R3xx Telegesis firmware as the ETRX2 and the two devices can be used in the

same network.

No RF experience or expertise is required to add this powerful wireless networking capability to

your products. The ETRX351-LRS and ETRX357-LRS offer fast integration opportunities and the

shortest possible time to market for your product.

1.1 Hardware Description

The main building blocks of the ETRX351-LRS and ETRX357-LRS are the single chip EM351 and

EM357 from Ember, a frontend module combining a Power Amplifier as well as a Low Noise

Amplifier, a 24MHz reference crystal and RF front-end circuitry optimized for best RF performance.

The modules are available with on-board antenna or alternatively a U.FL connector for attaching

external antennae. Modules with the U.FL connector are identified by the “HR” suffix.

The LNA and RF power amplifier of the LRS devices improve the output power by 12dB and the

sensitivity by 5dB which will increase the range by approximately 700% relative to the standard

devices (where local regulations permit the use of the maximum output power).

The integrated antenna is an Antenova Rufa, and details of the radiation pattern etc are available

from the Antenova website [5].

Module

Chip

Flash

RAM

ETRX351-LRS

EM351

128kB

12kB

ETRX351HR-LRS

EM351

128kB

12kB

ETRX357-LRS

EM357

192kB

12kB

ETRX357HR-LRS

EM357

192kB

12kB

Table 1: Memories

The ETRX351-LRS and ETRX357-LRS are 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 development environment is not suitable for an 802.15.4-only application

that does not use the ZigBee layer.

ETRX351-LRS and ETRX357-LRS

2 Product Approvals

The ETRX351-LRS and ETRX357-LRS have been designed to meet all national regulations for

world-wide use. In particular the following certifications have been obtained:

2.1 FCC Approvals

The Telegesis ETRX351-LRS and ETRX357-LRS with integrated Antenna as well as the

ETRX351HR-LRS and the ETRX357HR-LRS including the antennae listed in Table 2 complies

with FCC CFR Part 15 (USA). The devices meet the requirements for modular transmitter

approval as detailed in the FCC public notice DA00.1407.transmitter.

This device complies with Part 15 of the FCC rules. Operation is subject to the following

two conditions: (1) this device may not cause harmful interference, and (2) this device must

accept any interference received, including interference that may cause undesired

operation.

This module complies with the USA SAR requirements and is not intended to be operated within

20cm of the body. The following statement must be included as a CAUTION statement in manuals

for OEM products to alert users on FCC RF exposure compliance:

“WARNING: To satisfy FCC RF exposure requirements for mobile transmitting devices, a

separation distance of 20cm or more should be maintained between the antenna of this

device and persons during operation. To ensure compliance, operations at closer

distances than this are not recommended.”

Item

Part No.

Manufacturer

Type

Impedance

Gain

1

BKR2400

Embedded Antenna Design Ltd.

½ Wave

50Ω

2 dBi

2

BT-Stubby

(Straight)

Embedded Antenna Design Ltd.

¼ Wave

50Ω

0 dBi

3

BT-Stubby

(right-angle)

Embedded Antenna Design Ltd.

¼ Wave

50Ω

0 dBi

4

Rufa (on

board)

Antenova

Chip

50Ω

2.1dBi

(peak)

Table 2. Approved Antennae

An end user deploying an ETRX35x-LRS or an ETRX35xHR-LRS module together with an

external antenna as listed in Table 2 in not required to obtain a new authorization for the module –

BUT this not preclude the possibility that some other form of authorization or testing may be

required for the end product depending upon local territorial regulations.

The FCC requires the user to be notified that any changes or modifications made to this device

that are not expressly approved by Telegesis (UK) Ltd. may void the user's authority to operate the

equipment.

When using the ETRX351HR-LRS and ETRX357HR-LRS with approved antennae, it is required to

prevent end-users from replacing them with non-approved ones.

ETRX351-LRS and ETRX357-LRS

2.1.1 FCC Labelling Requirements

When integrating the ETRX351-LRS, ETRX357-LRS, ETRX351HR-LRS and ETRX357HR-LRS

into a product if must be ensured that the FCC labelling requirements are met. This includes a

clearly visible label on the outside of the finished product specifying the Telegesis FCC identifier

(FCC ID: S4GEM35XB) as well as the notice above. This exterior label can use wording such as

“Contains Transmitter Module FCC ID: S4GEM35XB” or “Contains FCC ID: S4GEM35XB”

although any similar wording that expresses the same meaning may be used.

2.2 IC (Industry Canada) Approvals

The Telegesis ETRX351-LRS, ETRX357-LRS, ETRX351HR-LRS and ETRX357HR-LRS modules

have been approved by Industry Canada to operate with the antenna types listed in Table 2 with

the maximum permissible gain and required antenna impedance for each antenna type indicated.

Antenna types not included in this list, having a gain greater than the maximum gain indicated for

that type, are strictly prohibited for use with this device.

IC-ID: 8735A-EM35XB

This device complies with Industry Canada license-exempt RSS standard(s). Operation is

subject to the following two conditions: (1) this device may not cause

interference, and (2) this device must accept any interference, including interference

that may cause undesired operation of the device.

Under Industry Canada regulations, this radio transmitter may only operate using an antenna

of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To

reduce potential radio interference to other users, the antenna type and its gain

should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not

more than that permitted for successful communication.

To comply with Industry Canada RF radiation exposure limits for general population, the

antenna(s) used for this transmitter must be installed such that a minimum separation

distance of 20cm is maintained between the radiator (antenna) and all persons at all times

and must not be co-located or operating in conjunction with any other antenna or transmitter.

This device has been designed to operate with the antennas listed in table 1, and

having a maximum gain of 2.0 dBi. Antennas not included in this list or having a

gain greater than 2.0 dBi are strictly prohibited for use with this device. The required

antenna impedance is 50 ohms.

The labeling requirements for Industry Canada are similar to those of the FCC. Again a clearly

visible label must be placed on the outside of the finished product stating something like “Contains

Transmitter Module, IC: 8735A-EM35XB”, although any similar wording that expresses the same

meaning may be used.

The integrator is responsible for final product compliance with IC ICES-003 and FCC Part 15,

Sub. B – Unintentional Radiators.

ETRX351-LRS and ETRX357-LRS

2.3 European Certification

The ETRX351-LRS, ETRX357-LRS, ETRX351HR-LRS and ETRX357HR-LRS modules are

certified at a maximum power level of 21.15mW e.i.r.p. (13.2dBm) to the following standards:

Radio: EN 300 328 v1.7.1 (10/2006)

EMC: EN 301 489-17 v2.1.1 (09/2008)

Safety: EN 60950-1:2006

The tests have been conducted with the antennae listed in Table 2.

0681 EC-R&TTE Certificated

If the ETRX351-LRS, ETRX357-LRS, ETRX351HR-LRS or ETRX357HR-LRS module is

incorporated into an OEM product, the OEM product manufacturer must ensure compliance of the

final product to the European Harmonised EMC, and low voltage/safety standards. A Declaration

of Conformity must be issued for each of these standards and kept on file as described in the

R&TTE Directive. The final product must not exceed the specified power ratings, antenna

specifications and installation requirements as specified in this user manual. If any of these

specifications are exceeded in the final product then a submission must be made to a notified body

for compliance testing to all of the required standards.

The „CE‟ marking must be applied to a visible location on any OEM product. For more information

please refer to http://ec.europa.eu/enterprise/faq/ce-mark.htm. Customers assume full

responsibility for learning and meeting the required guidelines for each country in their distribution

market.

Important Note: In Europe the regulations for the 2.4GHz frequency band are only harmonized for

devices with an e.i.r.p. of less than 10mW (10dBm). In the case of e.i.r.p. of more than 10mW the

manufacturer or his authorised representative established within the community or the person

responsible for placing the equipment on the market shall notify the national authority responsible

in the relevant Member State for spectrum management of the intention to place such equipment

on its national market. This notification shall be given no less than four weeks in advance of the

start of placing on the market.

Because of this Telegesis recommends that the user limits the output power to 10mW (10dBm) for

Europe to avoid having to deal with the local authorities for spectrum management of each

relevant member state.

ETRX351-LRS and ETRX357-LRS

2.4 Declarations of Conformity

Telegesis (UK) Ltd has issued Declarations of Conformity for all ETRX3 series ZigBee® RF

Modules, which cover Radio Emissions, EMC and Safety. These documents will be available from

our website or on request

2.5 IEEE 802.15.4

IEEE 802.15.4 is a standard for low data rate, wireless networks (raw bit-rate within a radio packet

of 250kbps @2.4GHz) which focuses on low cost, low duty cycle, long primary battery life

applications as well as mains-powered applications. It is the basis for the open ZigBee® Protocol.

2.6 The ZigBee® Protocol

The ZigBee® Protocol is a set of standards for wireless connectivity for use between any devices

over short to medium distances. The specification was originally ratified in December 2004, paving

the way for companies to start making low-power networks a reality.

ZigBee® uses an IEEE 802.15.4 radio specification running on the 2.4GHz band, plus three

additional layers for networking, security and applications. What makes the specification unique is

its use of a mesh network architecture which, in bucket chain style, passes data from one node to

the next until it lands at its destination. The network is self-healing and adapts its routing as link

quality changes or nodes move. Furthermore, nodes can be defined as End Devices which do not

act as routers, but can therefore be put into a low-power sleep state.

The enhanced version of the ZigBee® standard (or ZigBee® 2006) was released in December

2006, adding new features and improvements to the only global wireless communication standard

enabling the development of easily deployable low-cost, low-power, monitoring and control

products for homes, commercial buildings and industrial plant monitoring. In 2007 the ZigBee

Alliance introduced the PRO feature-set which offers advantages over earlier feature-sets,

including

Truly self healing mesh networking

Messages can now travel up to 30 hops

Source-Routing for improved point to multipoint message transmission

Improved security including Trust-Centre link keys

New message types and options

The Telegesis AT Command-set, which by default ships on all ETRX3 series products is based on

the ZigBee PRO feature-set. For more information on the Telegesis AT Command-set please refer

to the separate documentation at www.telegesis.com.

ETRX351-LRS and ETRX357-LRS

3 Module Pinout

Figure 1: ETRX3 series Module Pinout (top view)

The table below gives details about the pin assignment for direct SMD soldering of the ETRX3

series modules to the application board. For more information on the alternate functions please

refer to [2]. Also refer to the Telegesis AT Command-set documentation to understand how the

pre-programmed firmware makes use of the individual I/Os.

All GND pads are connected within the module, but for best RF performance all of them should be

grounded externally.

ETRX35x

pad

Designation

Normal

function

Alternate

function

EM35x

Ember designation

1

GND

2

N/C{1}

I/O

11

PC5 of the EM35x is used to control the FEM

3

PC6

I/O

13

OSC32B, nTX_ACTIVE

4

PC7

I/O

14

OSC32A, OSC32_EXT

5

PA7 {4}

I/O

18

TIM1C4

6

PB3 {2}

I/O

CTS

19

SC1nCTS, SC1SCLK, TIM2C3

7

nReset

12

8

PB4 {2}

I/O

RTS

20

TIM2C4, SC1nRTS, SC1nSSEL

9

PA0

I/O

21

TIM2C1, SC2MOSI

10

PA1

I/O

22

TIM2C3, SC2SDA, SC2MISO

11

PA2

I/O

24

TIM2C4, SC2SCL, SC2SCLK

12

PA3

I/O

25

SC2nSSEL, TRACECLK, TIM2C2

13

GND

14

PA4

I/O

26

ADC4, PTI_EN, TRACEDATA

15

PA5 {3}

I/O

27

ADC5, PTI_DATA, nBOOTMODE, TRACEDATA3

16

PA6 {4}

I/O

29

TIM1C3

17

PB1

TXD

30

SC1MISO, SC1MOSI, SC1SDA, SC1TXD, TIM2C1

18

PB2

RXD

31

SC1MISO, SC1MOSI, SC1SCL, SC1RXD, TIM2C2

19

GND

20

GND

21

JTCK

32

SWCLK

ETRX351-LRS and ETRX357-LRS

ETRX35x

pad

Designation

Normal

function

Alternate

function

EM35x

Ember designation

22

PC2

I/O

33

JTDO, SWO

23

PC3

I/O

34

JTDI

24

PC4

I/O

35

JTMS, SWDIO

25

N/C{1}

N/C

36

PB0 of the EM35x is used to control the FEM

26

PC1

I/O

ADC3

38

ADC3, SWO, TRACEDATA0

27

PC0 {4}

I/O

40

JRST, IRQD, TRACEDATA1

28

PB7 {4}

I/O

ADC2

41

ADC2, IRQC, TIM1C2

29

PB6 {4}

I/O

ADC1

42

ADC1, IRQB, TIM1C1

30

PB5

I/O

ADC0

43

ADC0, TIM2CLK, TIM1MSK

31

GND

32

Vcc

33

GND

Table 3. Pin Information

Notes:

{1} Pins PB0 and PC5 of the EM357 are used internally to control the front-end module and are not

available to the user.

{2} When using the Telegesis AT Command-set, RTS/CTS handshaking is selectable in firmware. See

the AT Command Manual.

{3} If PA5 is driven low at power-up or reset the module will boot up in the bootloader

{4} PA6, PA7, PB6, PB7 and PC0 can drive high current (see section 9)

Alternate functions depend on the firmware, but the Telegesis R3xx AT Command-set functions

are indicated here for convenience.

Important Note: The ETRX35x series and the ETRX35x-LRS series of modules are footprint

compatible, but on the ETRX35x-LRS series pins PB0 and PC5 of the EM357 are used internally

to control the front-end module and are not available to the user

ETRX351-LRS and ETRX357-LRS

4 Hardware Description

24MHz

EM35x

I/O

UART

I / O

programming

5

JTAG

Vcc

Vreg

RESET

Match

integrated

antenna

U.FL socket

rf

terminal

selection,

filtering and

matching

circuitry

LDO

1V8

1,8Vdc

A/D

LDO

1V25

Match

FEM

Figure 2: Hardware Diagram

The ETRX351-LRS and ETRX357-LRS are based on the Ember EM351 and EM357 respectively

in addition to a frontend module containing a PA, LNA and RF switch in addition to the RF-

Frontend. The EM351 and EM357 are fully integrated 2.4GHz ZigBee transceivers with a 32-bit

ARM® Cortex M3TM microprocessor, flash and RAM memory, and peripherals.

The industry standard serial wire and JTAG programming and debugging interfaces together with

the standard ARM system debug components help to streamline any custom software

development.

In addition to this a number of MAC functions are also implemented in hardware to help maintain

the strict timing requirements imposed by the ZigBee and IEEE802.15.4 standards.

The new advanced power management features allow faster wakeup from sleep and new power-

down modes allow this 3rd generation module to offer a longer battery life than any 2nd generation

modules on the market.

The EM35x has fully integrated voltage regulators for both required 1.8V and 1.25V supply

voltages. The voltages are monitored (brown-out detection) and the built in power-on-reset circuit

eliminates the need for any external monitoring circuitry. A 32.768kHz watch crystal can be

connected externally to pads 3 and 4 in case more accurate timing is required.

4.1 Hardware Interface

All GPIO pins of the EM351 or EM357 except PB0 and PC5 are accessible on the module‟s pads.

Whether signals are used as general purpose I/Os, or assigned to a peripheral function like ADC is

set by the firmware. When using the Telegesis AT Command-set please refer to the AT Command-

set manual for this information and when developing custom firmware please refer to the EM35x

datasheet.

ETRX351-LRS and ETRX357-LRS

5 Firmware Description

The modules will be pre-loaded with a standalone bootloader by Ember, 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 or reset 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-LRS as ASCII text, so a simple terminal

application will usually suffice. Telegesis Terminal is provided as a development tool, 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 feature-set.

The Telegesis firmware also allows low-level access to physical parameters such as radio channel

and power level. Parameters that define the functionality of the ETRX35x-LRS 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-LRS module as hardware only and develop application specific firmware based on the

EmberZNet stack. In order to develop custom firmware the Ember Insight tool-chain is required.

ETRX351-LRS and ETRX357-LRS

5.2 Boost Mode vs. Normal Mode

The Ember EM35x chips support a “boost mode” power setting next to the “normal mode” power

setting. The “boost mode” setting increases the sensitivity and output power of the radio

transceiver, however with the LRS variants enabling boost mode has no positive effect on neither

the output power nor the sensitivity and therefore it is recommended to not use boost mode on this

platform. The Telegesis AT Command-set firmware automatically disables boost mode on LRS

series modules.

Section 11.2lists the requirements for power settings for use of the LRS family in different

countries.

5.3 Software Interface

Using the default firmware the ETRX35x-LR is controlled using a simple AT-style command

interface and (mostly) non-volatile S-Registers. In order to get a full listing of all the available AT-

Commands, please refer to the AT command dictionary document which corresponds to the

firmware revision you intend to use.

In addition to the command dictionary there are user guides explaining the features of the firmware

in more detail. If you need to find out which firmware resides on your module simply type “ATI”

followed by a carriage return and you will be prompted with the module‟s manufacturing

information.

The Development Kit manual describes how to upgrade the firmware either via a serial link or over

the air.

ETRX351-LRS and ETRX357-LRS

6 Absolute Maximum Ratings

Supply: 3.6V

Inputs: -0.3V to Vcc + 0.3V

Operating temperature: -40 to 85°C

No.

Item

Symbol

Absolute Maximum Ratings

Unit

1

Supply voltage

VCC

-0.3 to +3.6

Vdc

2

Voltage on any I/O 11:0 ,

SIF_CLK, SIF_MISO, SIF_MOSI,

SIF_LOADB, RESET

Vin

-0.3 to VCC +0.3

Vdc

3

Voltage on any Pad pin (PA4, PA5,

PB5, PB6, PB7, PC1), when used as

an input to the general purpose ADC

with the low voltage range selected

Vin

-0.3 to +2.0

Vdc

4

Storage temperature range

Tstg

-40 to +105

°C

5

Operating temperature range

Top

-40 to +85

°C

6

Input RF level

Pmax

15

dBm

7

ESD on any pin {1} except the RF port

according to Human Body Model (HBM)

circuit description

VTHHBM

1

kV

8

ESD on RF Port

VTHHBM

500

V

9

Reflow temperature

TDeath

Please refer to chapter 13

°C

Table 4. Absolute Maximum Ratings

Note:

{1} Input must be current limited to the value specified.

The absolute maximum ratings given above should under no circumstances be violated.

Exceeding one or more of the limiting values may cause permanent damage to the device.

Caution! ESD sensitive device. Precautions should be used when handling the device

in order to prevent permanent damage.

7 Recommended Operating Conditions

No.

Item

Condition /

Remark

Symbol

Value

Unit

Min

Typ

Max

1

Supply voltage

VCC

2.1

3.0

3.5

Vdc

2

RF Input Frequency

fC

2405

2480

MHz

3

RF Input Power

0

dBm

4

Operating temperature

range

Top

-40

+85

°C

Table 5. Recommended Operating Conditions

ETRX351-LRS and ETRX357-LRS

8 DC Electrical Characteristics

VCC = 3.0V, TAMB = 25°C, NORMAL MODE unless otherwise stated

No.

Item

Condition /

Remark

Symbol

Value

Unit

Min

Typ

Max

1

Module supply voltage

VCC

2.1

3.0

3.6

Vdc

2

Quiescent current,

internal RC oscillator

disabled

ISLEEP

1

µA

3

Quiescent current,

internal RC oscillator

enabled

ISLEEP

1.2

µA

4

Quiescent current,

including

32.768kHz oscillator

ISLEEP

1.5

µA

5

Transmit current

consumption

at +20dBm

module output

power

ITXVCC

140

mA

7

Transmit current

consumption

at min. module

output power

ITXVCC

52

mA

8

Receive current

consumption

Total, 12MHz

clock speed

IRX

30

mA

9

Receive current

consumption

Total, 24MHz

clock speed

IRX

31.5

mA

12

MCU, RAM and flash,

FEM, radio off

12MHz clock

speed

IMCU

7

mA

13

MCU, RAM and flash,

FEM, radio off

24MHz clock

speed

IMCU

8

mA

14

Serial Controller

Max data rate

ISC

0.2

mA

15

Timer

Max clock rate

ITMR

0.25

mA

16

ADC

Max sample rate

IADC

1.1

mA

17

Wake time from deep

sleep

From wakeup

event to 1st

instruction

100

µs

18

Shutdown time

From last

instruction into

deep sleep

5

µs

Table 6. DC Electrical Characteristics

Please Note: The average current consumption during operation is dependent on the firmware

and the network load, therefore these figures are given in the command dictionary of the

respective firmware.

ETRX351-LRS and ETRX357-LRS

9 Digital I/O Specifications

The digital I/Os of the ETRX35x module have the ratings shown below.

VCC = 3.0V, TAMB = 25°C, NORMAL MODE unless otherwise stated

No.

Item

Condition /

Remark

Symbol

Value

Unit

Min

Typ

Max

1

Low Schmitt switching

threshold

Schmitt input

threshold going

from high to low

VSWIL

0.42 x VCC

0.5 x VCC

Vdc

2

High Schmitt switching

threshold

Schmitt input

threshold going

from low to high

VSWIH

0.62 x VCC

0.8 x VCC

MHz

3

Input current for logic 0

IIL

-0.5

µA

4

Input current for logic 1

IIH

0.5

µA

5

Input Pull-up resistor

value

RIPU

24

29

34

kΩ

6

Input Pull-down resistor

value

RIPD

24

29

34

kΩ

7

Output voltage for logic 0

IOL = 4mA (8mA) for

standard (high

current) pads

VOL

0

0.18 x VCC

V

8

Output voltage for logic 1

IOH = 4mA (8mA)for

standard (high

current) pads

VOH

0.82 x VCC

VCC

V

9

Output Source Current

Standard current

pad

IOHS

4

mA

10

Output Sink current

Standard current

pad

IOLS

4

mA

11

Output Source Current

High current pad

IOHH

8

mA

12

Output Sink current

High current pad

IOLH

8

mA

13

Total output current

IOH + IOL

40

mA

Table 7. Recommended Operating Conditions

ETRX351-LRS and ETRX357-LRS

10 A/D Converter Characteristics

The ADC is a first-order sigma-delta converter. For additional information on the ADC please refer

to section 10 of the EM35x datasheet.

No.

Item

1

A/D resolution

Up to 12 bits

2

A/D sample time for 5-bit conversion

5.33µs

3

A/D sample time for 12-bit conversion

682µs

4

Reference Voltage

1.2V

Table 8. A/D Converter Characteristics

11 AC Electrical Characteristics

VCC = 3.0V, TAMB = 25°C, NORMAL MODE measured at 50 terminal load connected to the U.FL socket

No.

Receiver

Value

Unit

Min

Typ

Max

1

Frequency range

2400

2500

MHz

2

Sensitivity for 1% Packet Error Rate (PER)

-107

-106

-100

dBm

4

Saturation (maximum input level for correct operation)

-3

2

dBm

5

High-Side Adjacent Channel Rejection