Telit Wireless Solutions SE868-A, SE868-AS, SE868K3-A, SE868K7-A, SE868K3-AL Product User Manual

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SE868Kx-Ax Family

Product User Guide

1VV0301201 Rev. 4

2018-07-20

SE868Kx-Ax Family Product User Guide Notices

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

NOTICES

While reasonable efforts have been made to ensure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this document has been carefully checked and is believed to be reliable, however no responsibility is assumed for inaccuracies or omissions. Telit reserves the right to make changes to any products described herein and reserves the right to revise this document and to make changes from time to time in content hereof with no obligation to notify any person of revisions or changes. Telit does not assume any liability arising out of the application or use of any product, software, or circuit described herein; neither does it convey license under its patent rights or the rights of others.

It is possible that this publication may contain references to, or information about Telit products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that Telit intends to announce such Telit products, programming, or services in your country.

COPYRIGHTS

This manual and the Telit products described herein may be, include or describe copyrighted Telit material, such as computer programs stored in semiconductor me mories or other media. Laws in Italy and other countries preserve for Telit and its licensors cer tain exclusive rights for copyrighted material, including the exclusive right to copy, reproduce in any form, distribute and make derivative works of the copyrighted material. Accordingly, any copyrighted material of Telit and its licensors contained herein or in the Telit products described in this manual may not be copied, reproduced, distributed, merged or modified in any manner w ithout the express written permission of Telit. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit, as arises by operation of law in the sale of a product.

COMPUTER SOFTWARE COPYRIGHTS

The Telit and Third Party supplied Software (SW) products described in this manual may include copyrighted Telit and other Third Party supplied computer programs stored in semiconductor memories or other media. Laws in Italy and other countries preserve for Telit and other Third Party supplied SW certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or reproduce in any form the copyrighted computer program. Accordingly, any copyrighted Telit or other Third Party supplied SW computer programs contained in the Telit products described in this manual may not be copied (reverse engineered) or reproduced in any manner without the express written permission of Telit or the third-party SW supplier. Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Telit or other Third Party supplied SW, except for the normal non-exclusive, royalty-free license to use that arises by operation of law in the sale of a product.

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SE868Kx-Ax Family Product User Guide Notices

USAGE AND DISCLOSURE RESTRICTIONS

I. License Agreements

The software described in this document is the property of Telit and its licensors. It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement.

II. Copyrighted Materials

Software and documentation a re copyrighted materials. M aking unauthorized copies is prohibited by law. No part of the software or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, without prior written permission of Telit

III. High Risk Materials

Components, units, or third-party products used in the product described herein are NOT faulttolerant and are NOT designed, manufactured, or intended for use as on-line control equipment in the following hazardous environments requiring fail-safe controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s) specifically disclaim any expressed or implied warranty of fitness for such high-risk activities.

IV. Trademarks

TELIT and the Stylized T Logo are registered in the Trademark Office. All other product o r service names are the property of their respective owners.

V. Third Party Right s

The software may include Third Party Right software. In this case you agree to comply with all terms and conditions imposed on you in respect of such separate software. In addition to Third Party Terms, the disclaimer of warranty and limitation of liability provisions in this License shall apply to the Third-Party Right software.

TELIT HEREBY DISCLAIMS ANY AND ALL WARRANTIES EXPRESS OR IMPLIED FROM ANY THIRD PARTIES REGARDING ANY SEPARATE FILES, ANY THIRD-PARTY MATERIALS INCLUDED IN THE SOFTWARE, ANY THIRD-PARTY MATERIALS FROM WHICH THE SOFTWARE IS DERIVED (COLLECTIVELY “OTHER CODE”), AND THE USE OF ANY OR ALL THE OTHER CODE IN CONNECTION WITH THE SOFTWARE, INCLUDING (WITHOUT LIMITATION) ANY WARRANTIES OF SATISFACTORY QUALITY OR FITNESS FOR A PARTICULAR PURPOSE.

NO THIRD PARTY LICENSORS OF OTHER CODE SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT LIMITATIO N LOST PROFIT S), HOWEVER CAUSED AND WHETHER MADE UNDER CONTRACT, TORT OR OTHER LEGAL THEORY, ARISING IN ANY WAY OUT OF THE USE OR DISTRIBUTION OF T HE OTHER CODE OR T HE EXERCISE OF ANY RIGHTS GRANTED UNDER EITHER OR BOTH THIS LICENSE AND THE LEGAL TERMS APPLICABLE TO ANY SEPARATE FILES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

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SE868Kx-Ax Family Product User Guide Product Applicability

PRODUCT

SE868K3-A

SE868K3-AL

PRODUCT APPLICABILITY

SE868-A SE868-AS

SE868K7-A SE868K7-AL

Table 0-1 Product Applicability Table

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SE868Kx-Ax Family Product User Guide Contents

NOTICES .................................................................................................................................... 2

COPYRIGHTS ............................................................................................................................ 2

COMPUTER SOFTWARE COPYRIGHTS .................................................................................. 2

USAGE AND DISCLOSURE RESTRICTIONS ........................................................................... 3

PRODUCT APPLICABILITY ...................................................................................................... 4

CONTENTS ................................................................................................................................ 5

TABLES ..................................................................................................................................... 9

FIGURES .................................................................................................................................. 10

1 INTRODUCTION ........................................................................................................... 11

1.1 Purpose .................................................................................................................... 11

1.2 Contact and Support Information .............................................................................. 11

1.3 Related Documents and Downloads ......................................................................... 11

1.3.1 Related Documents and downloads ..................................................................... 11

1.3.2 Related Documents Requiring a Non-Disclosure Agreement ............................... 11

1.4 Text Conventions ...................................................................................................... 12

2 PRODUCT DESCRIPTION ........................................................................................... 13

2.1 Product Overview ..................................................................................................... 13

2.2 SE868xx-A Product Naming ..................................................................................... 14

2.3 Product Variants ....................................................................................................... 14

2.3.1 Multi-constellation modules (SE868-A and SE868K3-Ax) features ....................... 15

2.3.2 GPS-only modules (SE868-AS and SE868K7-Ax) features .................................. 15

2.3.3 Related Products .................................................................................................. 16

2.4 Block Di agrams ......................................................................................................... 17

2.4.1 Early Production ................................................................................................... 17

2.4.2 Current Production ............................................................................................... 18

2.5 Module Photos .......................................................................................................... 19

3 EVALUATION BOARD (EVB)....................................................................................... 21

4 PRODUCT FEATURES ................................................................................................ 22

4.1 Built-in Antenna ........................................................................................................ 22

4.2 Multi-Constellation Navigation (SE868-A and SE868K3-Ax only). ............................. 22

4.3 Quasi-Zenith Satellite System (QZSS) ...................................................................... 22

4.4 Satellite-Based Augmentation System (SBAS) ......................................................... 22

4.4.1 SBAS Corrections ................................................................................................ 22

4.5 Differential GPS (DGPS) ........................................................................................... 22

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SE868Kx-Ax Family Product User Guide Contents

4.6 Assisted GPS (AGPS) .............................................................................................. 23

4.6.1 Locally-generated AGPS - Embedded Assist System (EASY) .............................. 23

4.6.2 Server-generated AGPS - Extended Prediction Orbit (EPO) ................................ 23

4.6.3 Host EPO ............................................................................................................. 23

4.7 Elevation Mask Angle ............................................................................................... 24

4.8 Static Navigation ....................................................................................................... 24

4.9 Jamming Rejection – Active Interference Cancellation (AIC) .................................... 24

4.10 Internal LNA (SE868Kx-A/AL modules only) ............................................................ 25

4.11 10 Hz Navigation ...................................................................................................... 25

4.12 1PPS ........................................................................................................................ 25

4.13 Serial I/O Ports ......................................................................................................... 25

4.14 Power Management Modes ...................................................................................... 26

4.14.1 Full Power Continuous Mode ............................................................................... 26

4.14.2 Backup Mode (Perpetual) (SE868-A and SE868K3-Ax only) ............................... 27

4.14.3 Standby Modes .................................................................................................... 27

4.14.4 GLP Mode (SE868-A and SE868K3-Ax only) ...................................................... 27

4.14.5 Periodic Modes (SE868-A and SE868K3-Ax only) .............................................. 28

4.14.6 AlwaysLocate™ Modes (SE868-A and SE868K3-Ax only) ................................... 29

5 DATA RETENTI ON ....................................................................................................... 30

6 PRODUCT PERFORMANCE ........................................................................................ 31

6.1 Horizontal Position Accuracy .................................................................................... 31

6.2 Time to First Fix ........................................................................................................ 31

6.3 Sensitivity ................................................................................................................. 32

6.4 Jamming Mitigation Performance example ............................................................... 33

7 MESSAGE INTERFACE ............................................................................................... 34

7.1 NMEA Output Messages .......................................................................................... 34

7.1.1 Standard Messages ............................................................................................. 34

7.1.2 Proprietary Output Messages ............................................................................... 35

7.2 NMEA Input Commands ........................................................................................... 36

7.2.1 NMEA Commands List ......................................................................................... 36

8 FLASH UPGRADABILI TY ............................................................................................ 37

9 ELECTRICAL INTERFACE .......................................................................................... 38

9.1 SE868-A Family Pinout Diagram ............................................................................... 38

9.2 38

9.3 SE868-A Module Pinout Tables ................................................................................ 39

9.3.1 SE868-A Pinout Table .......................................................................................... 39

9.3.2 SE868-AS Pinout Table ....................................................................................... 40

9.3.3 SE868K3-A Pinout Table ..................................................................................... 41

9.3.4 SE868K7-A Pinout Table ..................................................................................... 42

9.4 SE868-Ax to SE868Kx-Ax Comparison and Migration .............................................. 43

9.4.1 SE868-A and SE868K3-Ax Pinout Comparison .................................................... 44

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SE868Kx-Ax Family Product User Guide Contents

9.4.2 SE868-AS and SE868K7-Ax Pinout Comparison ................................................. 45

9.5 DC Power Supply ..................................................................................................... 46

9.5.1 VCC ..................................................................................................................... 46

9.5.2 VBATT ................................................................................................................. 46

9.5.3 DC Power Requirements ...................................................................................... 46

9.5.4 DC Power Consumption: SE868-A ....................................................................... 47

9.5.5 DC Power Consumption: SE868-AS .................................................................... 47

9.5.6 DC Power Consumption: SE868K3-Ax ................................................................. 48

9.5.7 DC Power Consumption: SE868K7-Ax ................................................................. 48

9.6 Control and Status Signals ........................................................................................ 49

9.6.1 I/O Signal Levels .................................................................................................. 49

9.6.2 Control and Input Signals ..................................................................................... 50

9.6.3 Output Signals ...................................................................................................... 51

9.7 Serial I/O Ports ......................................................................................................... 52

9.8 Port U sage ................................................................................................................ 52

9.8.1 Primary (Port 0) Usage ......................................................................................... 52

9.8.2 Secondary (Port 1) Usage .................................................................................... 52

9.8.3 UART Port Operation ........................................................................................... 52

9.8.4 I

9.8.5 SPI Port Operation (MT3333-based modules only) ............................................. 53

C Port Operation (MT3333-based modules only) .............................................. 53

10 RF FRONT-END DESIGN ............................................................................................. 54

10.1 RF Signal Requirements ........................................................................................... 54

10.2 GNSS Antenna (included in the module) ................................................................... 55

10.3 Ground Plane............................................................................................................ 56

10.4 RF Interference ......................................................................................................... 57

10.5 Shielding ................................................................................................................... 57

11 REFERENCE DESIGN .................................................................................................. 58

12 MECHANICAL DRAWINGS .......................................................................................... 59

13 PCB FOOTPRINT ......................................................................................................... 60

14 PACKAGING AND HANDLING .................................................................................... 61

14.1 Product Marking and Serialization ............................................................................. 61

14.2 Product Packaging .................................................................................................... 62

14.3 Moisture Sensitivity ................................................................................................... 64

14.4 ESD Sensitivity ......................................................................................................... 66

14.5 Assembly Considerations.......................................................................................... 66

14.6 Washing Considerations ........................................................................................... 66

14.7 Reflow....................................................................................................................... 67

14.8 Safety ....................................................................................................................... 68

14.9 Disposal .................................................................................................................... 68

15 ENVIRONMENTAL REQUIREMENTS .......................................................................... 69

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SE868Kx-Ax Family Product User Guide Contents

15.1 Operating Environmental Limits ................................................................................ 69

15.2 Storage Environmental Limits ................................................................................... 69

16 COMPLIANCES ............................................................................................................ 70

16.1 EU (RED) Declarations of Co nformity ....................................................................... 71

17 SAFETY RECOMMENDATIONS .................................................................................. 77

18 GLOSSARY AND ACRONYMS .................................................................................... 78

19 DOCUMENT HISTORY ................................................................................................. 81

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SE868Kx-Ax Family Product User Guide Tables

TABLES

Table 0-1 Product Applicability Table ........................................................................................ 4

Table 2-1 Product Variants.......................................................................................................14

Table 2-2 Multi-constellation (SE868-A and SE868K3-A) variants ...........................................15

Table 2-3 GPS-only (SE868-AS and SE868K7-Ax) variants ....................................................15

Table 2-4 ROM Features changes ............................................................................................16

Table 4-1 Power Management command summmary ...............................................................26

Table 5-1 Data Retention ..........................................................................................................30

Table 6-1 SE868xx-A Horizontal Position Accuracy ..................................................................31

Table 6-2 SE868xx-A Time to First Fix ......................................................................................31

Table 6-3 SE868-A Sensitivity ...................................................................................................32

Table 6-4 SE868Kx-Ax Sensitivity .............................................................................................32

Table 7-1 Default NMEA output messages ...............................................................................34

Table 7-2 Available Messages ..................................................................................................34

Table 7-3 NMEA Talker IDs ......................................................................................................35

Table 7-4 Proprietary Output Messages ....................................................................................35

Table 7-5 NMEA Input commands ............................................................................................36

Table 9-1 SE868-A Pinout Table ...............................................................................................39

Table 9-2 SE868-AS Pinout Table ...........................................................................................40

Table 9-3 SE868K3-Ax Pinout Table .........................................................................................41

Table 9-4 SE868K7-Ax Pinout Table .........................................................................................42

Table 9-5 SE868-A and SE868K3-A Pinout Comparison ..........................................................44

Table 9-6 SE868-AS and SE868K7-A Pinout Comparison ........................................................45

Table 9-7 DC Supply Voltage ....................................................................................................46

Table 9-8 SE868-A Power Consumption ...................................................................................47

Table 9-9 SE868-AS Power Consumption ................................................................................47

Table 9-10 SE868K3-Ax Power Consumption ...........................................................................48

Table 9-11 SE868K7-Ax Power Consumption ...........................................................................48

Table 9-12 Input Logic Levels: RX and Reset-N ........................................................................49

Table 9-13 Input Logic Levels: Force_On..................................................................................49

Table 9-14 Output Logic Levels: TX and 1PPS .........................................................................49

Table 10-1 Supported Constellations ........................................................................................55

Table 15-1 SE868 Family Operating Environmental Limits .......................................................69

Table 15-2 SE868 Family Storage Environmental Limits ...........................................................69

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SE868Kx-Ax Family Product User Guide Figures

FIGURES

Figure 2-1 Product Naming ......................................................................................................14

Figure 2-2 SE868-Ax Block Diagram ........................................................................................17

Figure 2-3 SE868-ASx Block Diagram .....................................................................................17

Figure 2-4 SE868K3-Ax Block Diagram ....................................................................................18

Figure 2-5 SE868K7-Ax Block Diagram ...................................................................................18

Figure 2-6 SE868 Family Photo ...............................................................................................19

Figure 2-7 SE868xx-Ax Top View Photos .................................................................................20

Figure 3-1 SE868 Family Evaluation Board Photo ...................................................................21

Figure 4-1Jamming Rejection ...................................................................................................24

Figure 4-2 GNSS Low Power (GLP) mode diagram ..................................................................27

Figure 4-3 Periodic Modes diagram ..........................................................................................28

Figure 4-4 Periodic Mode example 1 .........................................................................................28

Figure 4-5 Periodic Mode example 2 .........................................................................................28

Figure 6-1 Jamming with AIC Disabled .....................................................................................33

Figure 6-2 Jamming with AIC Enabled ......................................................................................33

Figure 9-1 SE868-A Family Pinout Diagram ..............................................................................39

Figure 9-2 1PPS NMEA Synchronization ..................................................................................51

Figure 10-1 SE868 Family Ground Plane ..................................................................................56

Figure 11-1 SE868 Family Reference Design ..........................................................................58

Figure 12-1 SE868 Family (low profile) Mechanical Drawing .....................................................59

Figure 12-2 SE868 Family (high profile) Mechanical Drawing ...................................................59

Figure 13-1 SE868 Family Footprint .........................................................................................60

Figure 14-1 Product Label ........................................................................................................61

Figure 14-2 SE868 Family Label Description ...........................................................................61

Figure 14-3 SE868 Family - Tape Reel ....................................................................................62

Figure 14-4 SE868 Family - Tape Detail ...................................................................................63

Figure 14-5 Moisture Sensitive Device Label ............................................................................65

Figure 14-6 SE868 Family Recommended Reflow Profile ........................................................67

Figure 16-1 SE868-A EU RED Declaration of Conform ity .........................................................71

Figure 16-2 SE868-AS EU RED Declaration of Conform ity .......................................................72

Figure 16-3 SE868K3-A EU RED Declaration of Conformity .....................................................73

Figure 16-4 SE868K3-AL EU RED Declaration of Conformity ...................................................74

Figure 16-5 SE868K7-A EU RED Declaration of Conf ormity .....................................................75

Figure 16-6 SE868K7-AL EU RED Declaration of Conformity ...................................................76

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SE868Kx-Ax Family Product User Guide Introduction

1 INTRODUCTION

1.1 Purpose

The purpose of this document is to provide information regarding the function, features, and usage of the Telit products listed in Table 0-1 Product Applicability Table.

Please refer to Section 2 Product Description for details of the members of the product family.

1.2 Contact and Support Information

For general contact, technical support services, technical questions, and to report documentation errors contact Telit Technical Support at:

• TS-EMEA@telit.com

• TS-AMERICAS@telit.com

• TS-APAC@telit.com

• TS-SRD@telit.com for Global Bluetooth support

For detailed information about where you can buy the Telit modules or for recommendations on accessories and components visit:

• http://www.telit.com

Our aim is to make this guide as helpful as possible. Keep us informed of your comments and suggestions for improvements.

Telit appreciates feedback from the users of our information.

1.3 Related Documents and Downloads

Please refer to https://www.telit.com/m2m-iot-products/positioning-timing-modules// for current documentation and downloads

1.3.1 Related Documents and downloads

• Datasheets

• Product User Guides

• EVK User Guides

• Software User Guides

• Application Notes

• TelitView installation and documentation

1.3.2 Related Documents Requiring a Non-Disclosure Agreement

• Authorized Software User Guides

• Product firmware

1VV0301201 Rev. 4 Page 11 of 82 2018-07-20

SE868Kx-Ax Family Product User Guide Introduction

This information MUST be followed or catastrophic

Caution or Warning – T his is an important point about integrating the system may malfunction or fail.

1.4 Text Conventions

Dates are in ISO 8601 format, i.e. YYYY-MM-DD.

Symbol Description

Danger – equipment failure and/or bodily injury may occur.

product into a system. If this information is disre garded, the product or

Tip – This is advice or suggestion that may be useful w hen integrating the product.

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SE868Kx-Ax Family Product User Guide Product Description

2 PRODUCT DESCRIPTION

The SE868Kx-A GNSS family of GNSS receiver modules (with built-in antenna) provides complete position, velocity, and time (PVT) engines featuring high performance, high sensitivity, and low power consumption.

All modules compute a navigation solution using GPS signals. Multi-constellation modules add GLONASS and Galileo signals to yield better coverage, greater accuracy, and improved availability.

• Multi-constellation (MT3333): SE868-A and SE868K3-A/AL

• GPS-only (MT3337): SE868-AS and SE868K7-A/AL

Special features -

• These modules include a built-in 9 x 9 mm SMT patch antenna

2.1 Product Overview

• Complete GNSS receiver module including memory, LNA, TCXO, and RTC plus a built-in patch antenna

• Constellations: o SE868-A and SE868K3-A: GPS (L1), Glonass (L1), and BeiDou B 1with 99 search and 33

tracking channels. Galileo ready.

o SE868-AS and SE868K7-A: GPS(L1) and QZSS ranging with 66 search and 22 tracking

channels

• SBAS corrections capable

• DGPS capable using the RTCM SC-104 protocol

• AGPS support for extended ephemeris using local or server-based solutions:

o Local: Embedded Assist System (EASY) o Server: Extended Prediction Orbit (EPO)

• Jamming Rejection: Active Interference Cancellation (AIC)

• NMEA command input and data output

• Configurable fix reporting - Default: 1Hz, Max: 10 Hz

• Two serial ports for input commands and output messages

o SE868-A and SE868K3-Ax: The secondary serial port is I

via command

• 1PPS output

• SE868-A and SE868K3-Ax: 8 Megabit built-in flash memory

• SE868-AS and SE868K7-Ax: ROM memory

• Less than 100 mW total power consumption (Full Power mode – typical, GNSS )

• Power management modes for extended battery life

• Supported by evaluation kits

• -40°C to +85°C industrial temperature range

• 11 x 11 x 6.1 mm (nominal) 32-pad LGA package.

• Low profile (-AL) module height is 4.1 mm.

• Surface mountable by standard SMT equipment

• RoHS compliant design

(WAAS, EGNOS, etc.) (SE868-A and SE868K3-Ax only)

1 1

C, but is configurable for UART

Note 1: Pleas e refer t o Section 4.6 Assisted GPS (AGPS).

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SE868Kx-Ax Family Product User Guide Product Description

Figure

2.2 SE868xx-A Product Naming

2-1 Product Naming

Note - Early production modules:

• The ”K x x” fields are not present,

• The “–A” was replaced by “-AS” on SE868-AS and SE868K7-Ax (ROM) GPS-only modules

2.3 Product Variants

Module Chipset Constellations Memory Antenna Notes

SE868-A MT3333 Multi Flash High Early production

SE868-AS MT3337E GPS only ROM High Early production

SE868K3-A MT3333 Multi Flash High

SE868K3-AL MT3333 Multi Flash Low

SE868K7-A MT3337E GPS only ROM High

SE868K7-AL MT3337E GPS only ROM Low

Table 2-1 Product Variants

Please refer to Section 9.4 SE868-Ax to SE868Kx-Ax Comparison and Migration for detailed pinout differences.

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SE868Kx-Ax Family Product User Guide Product Description

Feature

SE868-A

SE868K3-A

SE868K3-AL

Additional LNA

Yes

Antenna Profile

High

Low

Feature

SE868-AS

SE868K7-A

SE868K7-AL

GNSS chip

MT3337 or MT3337E

MT3337E

Antenna Profile

High

Low

AGPS (EASY)

MT3337E only

2.3.1 Multi-constellation modules (SE868-A and SE868K3-Ax) features

• MediaTek MT3333 engine

• GPS, QZSS, and GLONASS satellite signals. Galileo ready

• SBAS satellite sign als

• Flash memory with Upgradable firmware

• AGPS: Local (EASY) and server-based (EPO)

• Force-On pin

C (default) on the 2nd port. May be configured for UART or SPI

• I

Table 2-2 Multi-constellation (SE868-A and SE868K3-A) variants

2.3.2 GPS-only modules (SE868-AS and SE868K7-Ax) features

• MediaTek MT3337 (early production) or MT3337E (enhanced) engine

• GPS and QZSS satellite signals

• ROM memory

• AGPS: Local (EASY) and server-based (EPO)

o EASY requires MT3337E ROM.EASY data is stored in RTC RAM. o EPO is host-based

• No Force-On pin

• Only UART on t he 2

port. I2C is not available.

Table 2-3 GPS-only (SE868-AS and SE868K7-Ax) variants

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SE868Kx-Ax Family Product User Guide Product Description

SE868-AS P/N SE868ASA210Rxxx

SE868-AS P/N SE868ASA232Rxxx

SE868K7-Ax

SBAS

Yes

LOCUS

Yes

2.3.2.1 ROM Features (SE868-AS and SE868K7-Ax modules)

Feature

ROM version 3337 3337E (enhanced) 3337E (enhanced) EASY No Yes Yes

AlwaysLocate Yes No No

(early production)

Table 2-4 ROM Features changes

2.3.3

The SE878Kx-Ax module is similar to the SE868Kx-Ax. Major differences are:

Related Products

• Module size is 18 x 18 x 6.2 mm.

The antenna is larger (17 x 17 mm)

•

• An RF switch and antenna input pin is provided to accept signals from an external antenna

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SE868Kx-Ax Family Product User Guide Product Description

2.4 Block Diagrams

2.4.1 Early Production

Figure 2-2 SE868-Ax Block Diagram

Figure 2-3 SE868-ASx Block Diagram

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SE868Kx-Ax Family Product User Guide Product Description

2.4.2 Current Production

Figure 2-4 SE868K3-Ax Block Diagram

Figure 2-5 SE868K7-Ax Block Diagram

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SE868Kx-Ax Family Product User Guide Product Description

2.5 Module Photos

Figure 2-6 SE868 Family Photo

Note: All modules in the applicability table have a similar appearance. The SE868Kx-AL (low profile) modules are 2 mm shorter that the SE868-AS shown

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SE868Kx-Ax Family Product User Guide Product Description

Figure 2-7 SE868xx-Ax Top View Photos

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SE868Kx-Ax Family Product User Guide Evaluation Board (EVB)

3 EVALUATION BOARD (EVB)

The EVB cont ains the module mounted on a PC Board to facilitate development and testing. Please refer to the product Evaluation Board User Guide for detailed information.

Figure 3-1 SE868 Family Evaluation Board Photo

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SE868Kx-Ax Family Product User Guide Product Features

4 PRODUCT FEATURES

4.1 Built-in Antenna

The module includes a built-in antenna for GPS, Galileo and GLONASS signals. See section 10.2 GNSS Antenna (included in the module) for constellations supported by each module.

4.2 Multi-Const e ll a ti on Na vi ga t ion (SE868-A and SE868K3-Ax only).

GPS and GLONASS constellations are enabled by default. BeiDou and Galileo are also supported. If BeiDou is enabled, GLONASS and Galileo are disabled.

The user may enable or disable constellations via the $PMTK353 command.

4.3 Quasi-Zenith Satellite System (QZSS)

The satellites of the Japanese regional system are in a highly inclined, elliptical geosynchronous orbit, allowing continuous high-elevation coverage over Japan using only three satellites plus one geostationary satellite. PRNs 193, 194, and 195 are supported. They provide ranging signals for augmentation of the GPS system

QZSS constellation usage is controlled by the $PMTK352 command and is disabled by default. NMEA reporting for QZSS may be enabled/disabled by the $PMTK351 command.

4.4 Satellite-Based Augmentation System ( S BAS)

SBAS is not supported on the current production SE868-AS and SE868K7-Ax modules (with the enhanced ROM).

The receiver is capable of using SBAS satellites as a source of differential corrections. These systems (WAAS, EGNOS, GAGAN and MSAS) use geostationary satellites to transmit signals similar to those of GPS and in the same L1 band.

Enabling SBAS limits the maximum fix r ate to 5 Hz. If disabled, the maximum is 10 Hz. The module is enabled for SBAS by default, but can be disabled by command $PTMK313.

Either SBAS or DGPS corrections can be used and are set by the $PMTK301 command.

4.4.1 SBAS Corrections

The SBAS satellites transmit a set of differential corrections to their respective regions. The use of SBAS corrections can improve positioning accuracy

4.5 Differential GPS (DGPS)

DGPS is a Ground-Based Augmentation System (GBAS) for reducing position errors by applying corrections from a set of accurately-surveyed ground stations located over a wide area. These reference stations measure the range to each satellite and compare it to the known-good range. The differences can then be used to compu te a se t of co rrections w hich are transmitted, ei ther by radio to a DGPS receiver or over the internet.

The DGPS receiver can then send them to the module 2nd serial port (RX2) using the RTCM SC104 Version 2.3 protocol message types 1, 2, 3, and 9.

These corrections can significantly improve the accuracy of the position reported to the user. The MT3333-based modules can accept either the RTCM SC-104 messages or SBAS di fferential

corrections via command $PMTK501.

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4.6 Assisted GPS (AGPS)

Assisted GPS (or Aided GPS) is a method by which information from a source other than broadcast GPS signals is used to improve (i.e. reduce) TTFF.

The necessary ephemeris data is calculated either by the receiver itself (locally-generated ephemeris) or a server (server-generated ephemeris) and is then stored in the module.

Please refer to Section 2.3 Product Variants for applicability.

4.6.1 Locally-generated AGPS - Embedded Assist System (EASY)

Proprietary algorithms within the module perform GPS ephemeris prediction locally from stored broadcast ephemeris data (received from tracked satellites). The algorithms predict orbital parameters for up to three days. The module must operate in Full Power mode for at least 5 minutes to collect ephemeris data from visible satellites, or 12 hours for the full constellation.

EASY is disabled if the fix rate is > 1 Hz. EASY is on by default, but can be disabled by command PMTK869.

Please refer to Section 2.3 Product Variants for applicability.

4.6.2 Server-generated AGPS - Extended Prediction Orbit (EPO)

(SE868-A and SE868K3-Ax only)

Server-generated ephemeris predictions are maintained on Telit AGPS servers. The predicted ephemeris file is obtained from the AGPS server and is transmitted to the module over a serial port. These predictions do not require local broadcast ephemeris collection, and are valid for up to 14 days.

The SE868-A and SE868K3-Ax modules support server-based AGPS as a standard feature. Please refer to the next section regarding EPO support (Host EPO) on the SE868-AS and SE868K7-Ax modules.

Note that the EPO data stream does not conform to the NMEA-0183 standard. Please refer to the Telit EPO Application Note for details. Example source code is available under

NDA. Contact TELIT for support regarding this service.

4.6.3 Host EPO

The SE868-AS and SE868K7-Ax modules do not have flash memory. However, they can still make use of Assisted GPS. If the system design includes a host processor, it can access servergenerated EPO data and send it to the module over the serial port. This data is valid for six hours.

Host EPO data is not retained over a power cycle. Note that the EPO data stream does not conform to the NMEA-0183 standard. Please refer to the MT333x Host EPO Application Note. Contact Telit support for further details.

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4.7 Elevation Mask Angle

The default elevation mask angle is 5°. It can be changed via the $PMTK311 command.

4.8 Static Navigation

Static Navigation is an operating mode in which the receiver will freeze the position fix when the speed falls below a set threshold (indicating that the receiver is stationary).

The course and altitude are also frozen, and the speed is reported as “0”. The navigation solution is unfrozen when the speed increases above a threshold or when the

computed position exceeds a set distance (10 m) from the frozen position (indicating that the receiver is again in motion). The speed threshold can be set via the $PMTK386 command.

Set this threshold to zero to disable static navigation. This feature is useful for applications in which very low dynamics are not expected, the classic

example being an automotive application. Static Navigation is disabled by default, but can be enabled by the $PMTK386 command.

4.9 Jamming Rejection – Active Interference Cancellation (AIC)

The receiver module detects and removes narrow-band interfering signals (jamming signals) without the need for external components or tuning. It rejects up to 12 CW (Continuous Wave) type signals of up to –80 dBm (total power signal levels). This feature is useful both in the design stage and during the production stage for uncovering issues related to unexpected jamming. When enabled, Jamming Rejection will increase current drain by about 1 mA, and impact on GNSS performance is low at modest jamming levels. However, at high jamming levels (e. g. –90 to –80 dB m), the RF signal sampling ADC starts to become saturated after which the GNSS signal levels start to diminish.

Jamming rejection is enabled by default, but can be disabled with the $PMTK286 command.

Figure 4-1Jamming Rejection

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SE868Kx-Ax Family Product User Guide Product Features

4.10 Internal LNA (SE868Kx-A/AL modules only)

The current-production modules include a built-in LNA to improve sensitivity.

4.11 10 Hz Navigation

The default rate of 1 Hz can be changed by command $PMTK500 to a maximum of 10 Hz. The SE868-AS and SE868K7-A maxim um is 5 Hz. Enabling the SBAS feature limits the maximum fix rate to 5 Hz.

4.12 1PPS

1PPS is a one pulse per second output signal. Please refer to Section 9.6.3.1 1PPS for details.

4.13 Serial I/O Ports

Port 0: All modules include a primary UART serial port. Port 1: The secondary port on MT3333-based modules is I2C by default, but can be chan ged to UAR T or

SPI via command. The secondary port on MT3337-based modules is UART and cannot be changed. Please refer to Section 9.7 Serial I/O Ports for details.

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SE868Kx-Ax Family Product User Guide Product Features

4.14 Power Management Modes

The receiver supports operating modes that reduce overall current consumption with less frequent position fixes. Availability of GNSS signals in the operating environment will be a factor in choosing power management modes. The designer can choose a mode that provides the best trade-off of navigation performance versus power consumption.

The various power management modes can be enabled by sending the desired command.

Table 4-1 Power Management command summmary

4.14.1 Full Power Continuous Mode

The receiver starts in full power continuous mode when powered up. This mode uses the acquisition engine to search for all possible satellites at full performance, resulting in the highest sensitivity and the shortest possible TTFF.

The receiver then switches to the tracking engine to lower the power consumption when:

• A valid GPS/GNSS position is obtained

• The ephemeris for each satellite in view is valid

To ret urn to Full Power mode from a low power mode, send a $PMTK225,0*2B command just after the module wakes up from its previous sleep cycle.

If power is removed from Vbatt, then Time, Ephemeris, Almanac, EASY, EPO data, and PMTK configuration data will be lost. If Vbatt is maintained, no data will be lost.

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4.14.2 Backup Mode (Perpetual) (SE868-A and SE868K3-Ax only)

In the backup mode, the internal Power Management Unit is turned off, leavi ng only BB RAM and the RTC powered up. This reduces power consumption to the minimum required that still provides data retention to enable hot and warm starts.

To enter the Perpetual Backup mode, use the NMEA command: $PMTK225,4.

Only the SE868-A and SE868K3-Ax have a Force_On pin.

This command will be rejected on the other modules (SE868-AS and SE868K7-Ax).

To exit the Perpetual Backup mode, bring the Force_On signal high, then return to low. Please refer to Section 9.6.2.2 FORCE_ON (SE868-A and SE868K3-Ax only) for deta ils.

4.14.3 Standby Modes

In these modes, the receiver stops navigation, the internal processor enters the standby state, and the current drain at main supply VCC_IN is substantially reduced.

STOP: ARM baseband, RF, and TCXO are powered down SLEEP: ARM baseband and RF are powered down

To ent er a Standby mode, send the following command:

$PMTK161,0*28 (STOP Mode) $PMTK161,1*29 (SLEEP Mode)

To exit a Standby mode, send any byte to the host port (RX).

4.14.4 GLP Mode (SE868-A and SE868K3-Ax only)

In the GNSS Low Power (GLP) mode, power consumption is reduced for some time during a one second period. The module will alternate this cycling with periods of full power when necessary, for example weak signals or decoding the navigation message. A typical current draw is 10 to 14 mA, depending on conditions.

Note that position accuracy will be reduced during GLP operation, therefore the user must determine the tradeoff between power consumption and desired accuracy.

A timeline is shown below:

Figure 4-2 GNSS Low Power (GLP) mode diagram

To enter the GLP mode, send the c ommand:

$PMTK262,3

To exit the GLP mode and return to full-power mode, send the command:

$PMTK262,0

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4.14.5 Periodic Modes (SE868-A and SE868K3-Ax only)

These modes allow autonomous power on/off control with reduced fix rate to decrease average power consumption. The main power supply pin VCC_ON is still powered, but power distribution to internal circuits is internally controlled by the receiver.

• STANDBY(SLEEP): ARM baseband and RF are powered down.

• BACKUP: ARM baseband, RF, and TCXO are powered down. RTC is powered up.

Figure 4-3 Periodic Modes diagram

Figure 4-4 Periodic Mode example 1

Figure 4-5 Periodic Mode example 2

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To ent er a Periodic mode, send the following NMEA command(s):

$PMTK223

Where: SV = 1 to 4, default = 1

SNR = 25 to 30, default = 28 Ext. threshold = 40 000 to 180 000 ms, default = 180 000 Ext. gap = 0 to 3 600 000 ms, default = 180 000 This is the limit between successive DEE

$PMTK225,<Type>,<Run_time>,<Sleep_time>,<2

,<SV>,<SNR>,<Extension threshold>,<Extension gap>*<checksum> (Optional)

_run_time>,<2nd_sleep_time>*<checkum>

Where:

Type = 1 for Periodic (backup) mode or 2 for Periodic (standby) mode Run_time = Full Power period (ms) Sleep_time = Standby period (ms)

_run_time = Full Power period (ms) for extended acquisition if GNSS acquisit ion fails

during Run_time

_sleep_time = Standby period (ms) for extended sleep if GNSS acquisition fails during

Run_time

Example: $PMTK225,1,3000,12000,18000,72000*16 for periodic mode with 3 s navigation and 12 s sleep in backup state.

The acknowledgement response for the command is:

$PMTK001,225,3*35

To exit Periodic Sleep mode, send the NMEA command

$PMTK225,0*2B

just after the module wakes up from a previous sleep cycle.

4.14.6 AlwaysLocate™ Modes (SE868-A and SE868K3-Ax only)

AlwaysLocate is not included in the 3337E (enhanced) ROM in the SE868K7-Ax modules. AlwaysLocate™ is an intelligent controller of the Periodic mode where the main supply pin

VCC_IN is still powered, but power distribution is controlled internally. Depending on the environment and motion conditions, the module can autonomously and adaptively adjust the parameters of the Periodic mode (e.g. RF on/off ratio and fix rate) to achieve a balance in positioning accuracy and power consumption. The average current drain will vary based on conditions.

To ent er an AlwaysLocate mode, send the following NMEA command:

$PMTK225,<mode>*<checksum><CR><LF>

Where mode = 8 for AlwaysLocate (standby) mode or 9 for AlwaysLocate (backup) mode Example: $PMTK225,9*22

The acknowledgement response for the command is:

$PMTK001,225,3*35

To exit AlwaysLocate mode, send the NMEA command:

$PMTK225,0*2B

just after the module wakes up from its previous sleep cycle.

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SE868Kx-Ax Family Product User Guide DATA RE T ENT ION

5 DATA RE TE NT ION

(SE868-A and SE868K3-Ax only)

The receiver is capable of retaining data elements under the various initialization types. If Vbatt is maintained, no data will be lost. The following table shows which data elements are saved under each type of initialization if bo th

Vcc and Vbatt are removed. To era se EPO data, use the $PMTK127 command.

Data Retention (1)

Initialization Almanac Ephemeris EPO Host EPO EASY Position Time

Power Cycle Y (2)

Reset (signal) Y

Full Cold Start Y (3)

Cold Start Y Y Y Y (3)

Warm Start Y Y Y Y Y Y

Hot Start Y Y Y Y Y Y Y

Reacquisition Y Y Y Y Y Y Y

Note 1: Commanded parameters (e.g. UART speed, feature enables, etc.) are not preserved over a power cycle.

Note 2: EPO is not available on the MT3337 (ROM-based modules). Use Host EPO.

Note 3: The standard definition of “Cold Start” does not allow time to be preserved. . Use “Full Cold Start” to compare with other vendor’s products’ “Cold Start”.

Table 5-1 Data Retention

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SE868Kx-Ax Family Product User Guide Product Performance

Constellation

CEP (m)

GPS

≤ 2.5

GLONASS

2.6

GPS + Glonass

≤ 2.5

Test Conditions: 24-hr Static, Live signals, Full Power mode

Note: SE868-AS and SE868K7-Ax modules support GPS only

Constellations(s)

Start Type

Max TTFF (s)

Hot

≤ 1.0

Warm

Cold

Hot

1.4

Warm

Cold

Hot

≤ 1.0

Warm

Cold

Test Conditions: Static scenario, -130 dBm, Full Power mode

Note: SE868-AS and SE868K7-Ax modules support GPS only

6 PRODUCT PERFORMANCE

6.1 Horizontal Position Accuracy

Table 6-1 SE868xx-A Horizontal Position Accuracy

6.2 Time to First Fix

GPS

Glonass

GPS + GLO

Table 6-2 SE868xx-A Time to First Fix

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Acquisition

-145

Navigation

-158

Tracking

-160

Acquisition

-145

Navigation

-158

Tracking

-159

Acquisition

-145

Navigation

-158

Tracking

-160

Minimum Signal Level (dBm)

Acquisition

-148

-146

Navigation

-163

-159

Tracking

-164

-160

Acquisition

-148

-146

Navigation

-161

-157

Tracking

-164

-160

6.3 Sensitivity

Constellations State Minimum Signal Level (dBm) - SE868-A

GPS

GLO

GPS + GLO

Table 6-3 SE868-A Sensitivity

Const State

SE868K3-A SE868K3-AL SE868K7-A SE868K7-AL

GPS

GPS + GLO

Table 6-4 SE868Kx-Ax Sensitivity

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6.4 Jamming Mitigation Per f orm a nc e exam ple

Figure 6-1 Jamming with AIC Disabled

Figure 6-2 Jamming with AIC Enabled

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GLL

Geographic Position – Latitude & Longitude

VTG

Course Over Ground & Ground Speed

ZDA

Time & D ate

7 MESSAGE INTERFACE

Serial I/O port 1 (RX0 & TX0 pins) supports full duplex communication between the receiver and the user.

The default serial configuration is: NMEA, 9600 bps, 8 data bits, no parity, and 1 stop bit. More information regarding the software interface can be found in the Telit MT S oftware U ser

Guide.

Customers that have executed a Non-Disclosure Agreement (NDA) with Telit may obtain the Telit MT-GNSS Authorized Software User Guide, which contains additional proprietary information.

7.1 NMEA Output Messages

Some sentences may exceed the NMEA length limitation of 80 characters.

Default: GPS constellation is enabled. GLONASS is also enabled for SE868-A and SE868K3-Ax modules. Default fix rate: 1 Hz. Maximum rate is 10 Hz. Multiple GSA and GSV messages may be output on each cycle.

7.1.1 Standard Messages

Message ID Description

RMC GNSS Recommended minimum navigation data GGA GNSS position fix data GSA GNSS Dilution of Precision (DOP) and active satellites GSV GNSS satellites in view.

Table 7-1 Default NMEA output messages

The following messages can be enabled by command:

Message ID Description

Table 7-2 Available Messages

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Talker ID

Constellation

BeiDou

Galileo

GLONASS

GPS

QZSS

The following table shows the Talker IDs used:

Table 7-3 NMEA Talker IDs

7.1.2 Proprietar y Output Messages

The receivers support several proprietary NMEA output messages which contain additional receiver data and status information.

Message ID Description

$PMTK010 System messages (e.g. to report startup, etc.)

Table 7-4 Proprietary Output Messages

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Command ID

Description

$PMTK101

Perform a HOT sta rt

$PMTK102

Perform a WARM st ar t

$PMTK103

Perform a COLD start. However, Time is preserved.

NOTE: Multi-constellation commands are not supported by the MT3337-based modules

7.2 NMEA Input Commands

The modules use NMEA proprietary messages for commands and command responses. This interface provides configuration and control over selected firmware features and operational properties of the module. Wait time is about 50 to 100 ms.

The format of a command i s: $<command-ID>[,<parameters>]*<cr><lf> Commands are NMEA proprietary format and begin with “$PMTKxxx”.

Parameters, if present, are comma-delimited as specified in the NMEA protocol. Unless otherwise noted in the Software User Guide, com mands are echoed back to the user after

the command is executed.

7.2.1 NMEA Commands List

Please refer to Table 4-1 Power Management command summmary for power management commands.

$PMTK000

Test. This command will be echoed back to the sender (for testing the communications link).

$PMTK104 Perform a FULL COLD start - system reset (erasing any st ored

almanac data) and then a COLD start $PMTK120 Erase aiding data stored in flash memory $PMTK127 Erase EPO data stored in flash memory $PMTK251,Baudrate Set NMEA Baud rate $PMTK313,0 Disable SBAS feature $PMTK313,1 Enable SBAS feature $PMTK353,1,0,0,0,0 Enable GPS only mode $PMTK353,0,1,0,0,0 Enable GLO only mode $PMTK353,1,1,0,0,0 Enable GPS and GLO mode

Table 7-5 NMEA Input commands

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SE868Kx-Ax Family Product User Guide Flash Upgradability

8 FLASH UPGRAD ABILITY

(SE868-A and SE868K3-Ax only)

Note: The SE868-AS and SE868K7-Ax modules use ROM memory and therefore are not upgradable.

Please refer to the product EVK User Guide for more detailed information.

The firmware stored in the internal Flash memory may be upgraded via the primary serial port TX/RX pins. In order to update the FW, the following steps should be performed to re-program the module.

1. Remove all power to the module.

2. Connect serial port USB cable to a PC.

3. Apply main power.

4. Clearing the entire flash memory is strongly recommended prior to programming.

5. Run the software utility to re-flash the module.

6. Upon successful completion of re-flashing, remove main power to the module for a minimum of 10 seconds.

7. Apply main power to the module.

8. Verify the module has returned to the normal operating state.

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

1. All Ground (GND) pins are to be grounded

2. Reserved pins (RES) are to be left floating

3. FORCE_ON is connected only on the SE868-A and SE868K3-Ax modules. See section 9.6.2.2 FORCE_ON (SE868-A and SE868K3-Ax only)

4. I2C and SPI pins are implemented only on the SE868-A and SE868K3-Ax. The I2C pins are UART on the SE868-AS andSE868K7-Ax.

5. The 2nd port is I2C on MT3333-based modules and UART on MT3337-based modules.

9 ELECTRICAL INTERFACE

9.1 SE868-A Family Pinout Diagram

9.2

Notes (Please refer to the detailed pinout tables below):

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No Connection

Not connected

Reserved

RES

Reserved. Do not connect

Reserved

RES

Reserved. Do not connect

I2C Data / TX1

I/O

I2C Data / UART1_Tx

No Connection

Not connected

No Connection

Not connected

DRI

Data Ready Indicator

No Connection

Not connected

VBATT

PWR

Backup Power supply

Figure 9-1 SE868-A Family Pinout Diagram

9.3 SE868-A Module Pinout Tables

9.3.1 SE868-A Pinout Table

PIN SIGNAL TYPE DESCRIPTION NOTES

Ground GND Ground

2 Reserved RES Reserved. Do not connect

Reserved RES Reserved. Do not connect

4 Reserved RES Reserved. Do not connect

No Connection NC Not connected

6 Ground GND Ground

Ground GND Ground

8 No Connection NC Not connected

Ground GND Ground

10 TX0 O Serial_Output_UART0

RX0 I Serial_Input_UART0

12 HRST_B I System Reset – Active Low

FORCE_ON I Force full-power mode 3

14 No Connection NC Not connected

No Connection NC Not connected

PPS O Pulse Per Second signal

Reserved RES Reserved. Do not connect

Ground GND Ground

I2C Clock / RX1 I/O I2C Clock / UART1_Rx

VCC PWR Main power supply

No Connection NC Not connected

Ground GND Ground

Note 3: Force-On is not implem ented in the MT3337

Table 9-1 SE868-A Pinout Table

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SIGNAL

TYPE

DESCRIPTION

NOTES

9.3.2 SE868-AS Pinout Table

1 Ground GND Ground

Reserved RES Reserved. Do not connect

3 Reserved RES Reserved. Do not connect

Reserved RES Reserved. Do not connect

5 No Connection NC Not connected

Ground GND Ground

7 Ground GND Ground

No Connection NC Not connected

9 Ground GND Ground

TX0 O Serial_Output_UART0

11 RX0 I Serial_Input_UART0

HRST_B I System Reset – Active Low

13 No Connection NC No Connection 3

No Connection NC Not connected

15 No Connection NC Not connected

No Connection NC Not connected

17 PPS O Pulse Per Second signal

Reserved RES Reserved. Do not connect

19 Reserved RES Reserved. Do not connect

Reserved RES Reserved. Do not connect

21 Ground GND Ground

TX1 O Serial_Output_UART1

23 RX1 I Serial_Input_UART1

No Connection NC Not connected

25 VCC PWR Main power supply

No Connection NC Not connected

27 No Connection NC Not connected

Reserved RES Reserved. Do not connect

29 No Connection NC Not connected

No Connection NC Not connected

31 Ground GND Ground

VBATT PWR Backup Power supply

Note 3: Force-On is not implem ented in the MT3337

Table 9-2 SE868-AS Pinout Table

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9.3.3 SE868K3-A Pinout Table

PIN SIGNAL TYPE DESCRIPTION NOTES

Ground GND Ground

2 Reserved RES EIT0 / GPIO12

Reserved RES GPIO9

4 Reserved RES Reserved. Do not connect

No Connection NC Not connected

6 Ground GND Ground

Ground GND Ground

8 No Connection NC Not connected

Ground GND Ground

10 TX0 O UART0 Serial Output (Transmit)

RX0 I UART0 Serial Input (Receive)

12 S_RESET I System Reset – Active Low

FORCE_ON I Force full-power mode 3

14 No Connection NC Not connected

SPI_MOSI I/O SPI Data MOSI 4

16 No Connection NC Not connected

PPS O Pulse Per Second signal

18 No Connection NC Not connected

SPI_CS I/O SPI Chip Select 4

20 Reserved RES GPIO10

Ground GND Ground

22 I2C Data / TX1 I/O I2C Data / UART1 Tx 4

I2C Clock / RX1 I/O I2C Clock / UART1 Rx 4

24 No Connection NC Not connected

VCC PWR Main power supply

26 No Connection NC Not connected

No Connection NC Not connected

28 DRI O Data Ready Indicator

SPI_CLK I/O SPI Clock 4

30 SPI_MISO I/O SPI Data MISO 4

Ground GND Ground

32 VBATT PWR Backup Power supply

Note 3: Force-On is not implem ented in the MT3337 Note 4: TX1/RX1 are UART-only on the MT3337

Table 9-3 SE868K3-Ax Pinout Table

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9.3.4 SE868K7-A Pinout Table

PIN SIGNAL TYPE DESCRIPTION NOTES

Ground GND Ground

2 Reserved RES EIT0 / GPIO 12 on MT3333

Reserved RES GPIO9 on MT3333.

4 Reserved RES Reserved. Do not connect

No Connection NC Not connected

6 Ground GND Ground

Ground GND Ground

8 No Connection NC Not connected

Ground GND Ground

10 TX0 O UART0 Serial Output (Transmit)

RX0 I UART0 Serial Input (Receive)

12 S_RESET I System Reset – Active Low

Reserved RES Reserved. Do not connect 3

14 No Connection NC Not connected

Reserved RES Res er ved. SPI on MT3333.

16 No Connection NC Not connected

PPS O Pulse Per Second signal

18 No Connection NC Not connected

Reserved RES Res er ved. SPI on MT3333.

20 Reserved RES GPIO10 on MT3333.

Ground GND Ground

22 TX1 I/O UART1 Tx 4

RX1 I/O UART1 Rx 4

24 No Connection NC Not connected

VCC PWR Main power supply

26 No Connection NC Not connected

No Connection NC Not connected

28 Reserved RES EIT1 / GPIO13 on MT3333.

Reserved RES Res er ved. SPI on MT3333.

30 Reserved RES Reserved. SPI on MT3333.

Ground GND Ground

32 VBATT PWR Backup Power supply

Note 3: Force-On is not implem ented in the MT3337 Note 4: TX1/RX1 are UART-only on the MT3337

Table 9-4 SE868K7-Ax Pinout Table

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9.4 SE868-Ax to SE868Kx-Ax Comparison and Migration

This section contains information relating to migrating from the early production modules to current production as follows:

• MTK3333-based: SE868-A to SE868K3-Ax

• MTK3337-based: SE868-AS to SE868K7-Ax

As shown in the following tables, the main differences for the SE868-A and SE868K3-Ax modules are the addition of SPI pins (which require a custom FW build) and the change of pin 18 from Reserved to No Connection.

For the SE868-AS and SE868K7-A modules, the main differences are the change from “No Connection” to “Reserved” for the FORCE_ON and SPI pins that are used on the SE868K3-Ax. This is to allow a compatible board design for the two modules as long as FORCE_ON, I SPI are not required.

There are also differences in the firmware (in flash memory for the SE868K3-Ax or ROM for the SE868K7-Ax).

C and

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

Signal

Ground

Reserved

Reserved (DR-IN)

Reserved

No Connection

Ground

No Connection

Ground

TX0

TX0 =

RX0

RX0 =

HRST_B

S_RESET

FORCE_ON

No Connection

SPI_MOSI

SPI MOSI

No Connection

PPS

PPS =

Reserved (ECLK)

No Connection

Reserved (SYNC_PULSE)

SPI_CS

SPI CS

Reserved (GIO10)

Reserved

Ground

I2C Data / TX1

I2C Clock / RX1

No Connection

VCC

VCC =

No Connection

DRI

DRI =

No Connection

SPI_CLK

SPI CLK

No Connection

SPI_MISO

SPI MISO

Ground

VBATT

VBATT =

9.4.1 SE868-A and SE868K3-Ax Pinout Comparison

PIN SE868-A Signal

SE868K3-Ax

Comparison Notes

Note 3: Force-On is not implemented in the MT3337 Note 4: TX1/RX1 are UART-only on the MT3337 Note 5: The 2

Table 9-5 SE868-A and SE868K3-A Pinout Comparison

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port is I2C on MT3333-based modules and UART on MT3337-based modules.

SE868Kx-Ax Family Product User Guide Electrical Interfac e

Signal

Ground

Reserved

Reserved (DR_IN)

Reserved

No Connection

Ground

No Connection

Ground

TX0

RX0

HRST_B

S_RESET

No Connection

Reserved

No Connection

Reserved

No Connection

PPS

Reserved (NC)

No Connection

Reserved (SYNC_PULSE)

Reserved

Reserved (NC)

Reserved

Ground

TX1

RX1

No Connection

VCC

No Connection

Reserved (NC)

Reserved

No Connection

Reserved

No Connection

Reserved

Ground

VBATT

9.4.2 SE868-AS and SE868K7-Ax Pinout Comparison

PIN SE868-AS Signal

SE868K7-Ax

Comparison

Notes

Notes are under Figure 9-1 SE868-A Family Pinout Diagram

Table 9-6 SE868-AS and SE868K7-A Pinout Comparison

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

Main Supply Voltage & Backup Voltage

Supply

Name

Min

Typ

Max

Units

Vcc and Vbatt

9.5 DC Power Supply

The modules have two power supply pins VCC and V

Note that I/O voltage ranges are different from supply voltages V

BATT

and V

BATT

9.5.1 VCC

This is the main power input. The supply voltage must be in the range specified in Table 9-7 DC Supply Voltage below.

Vcc does not supply the RTC domain, therefore Vbatt must be supplied any time that Vcc is powered. This may be accomplished by tying Vbatt to Vcc.

When power is first applied, the module will start up in full power continuous operation mode. During operation, the current drawn by the module can vary greatly, especially if enabling lowpower operation modes. The supply must be able to handle the current fluctuation including any inrush surge current.

GPS/GNSS receiver modules require a clean and stable power supply. In designing such a supply, any resistance in the Vcc line can negatively influence performance. Consider the following points: All supplies should be within the rated requirements. At the module input, use low ESR capacitors that can deliver the re quired current for switching from backup mode to no rmal operation. Keep the rail short and away from any n oisy data lines or sw itching supplies, e tc. Wide power lines and power planes are preferred.

9.5.2 VBATT

Battery backup power input (as specified in the table below) mus t be supplied any time that Vcc is powered up. This may be accomplished by tying Vbatt to Vcc.

Vbatt supplies power to the following elements (the RTC domain):

• real-time clock ( RTC)

• battery backed RAM (BBRAM)

• EASY data

• Persistent data elements (not commanded option values).

This allows the module to retain time and ephemeris information, thus enabling hot and warm starts, which will improve (decrease) TTFF.

9.5.3 DC Power Requi rem ents

Vcc & Vbatt 2.8 3.3 4.3 V

The drop from 2.7 V to 0 V must be > 1 ms. Also, keep the supply ripple as low as possible (< 50 mV)

Table 9-7 DC Supply Voltage

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

State & Constellation

Typ

Max

Units

Acquisition

GPS Only

123

GPS and Glonass

103

146

Navigation/Tracking

GPS Only

120

GPS and Glonass

139

Low Power Mode – Always Locate

GPS Only

19 mW

GPS and Glonass

25 mW

Vbatt

μW

Operating temperature: 25°C

1PPS sync: enabled

State (GPS only)

Typ

Max

Units

Acquisition

102

Navigation/Tracking

102

Low Power – AlwaysLocate Standby

16 mW

Vbatt

μW

Operating temperature: 25°C

1PPS sync: disabled

9.5.4 DC Power Consumption: SE868-A

Supply voltages: 3.3 VDC nominal

SBAS: enabled

Table 9-8 SE868-A Power Consumption

9.5.5 DC Power Consumption: SE868-AS

(3337 early production ROM only)

Supply voltages: 3.3 VDC nominal

SBAS: not supported

Table 9-9 SE868-AS Power Consumption

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

State & Constellation

Typ

Max

Units

Acquisition

GPS Only

107

151

GPS and Glonass

111

163

Navigation/Tracking

GPS Only

GPS and Glonass

132

Low Power Mode – Periodic (500 ms On)

GPS Only

GPS and Glonass

53 mW

Vbatt

μW

Operating temperature: 25°C

State (GPS only)

Typ

Max

Units

Acquisition

119

Navigation/Tracking

Vbatt

μW

Operating temperature: 25°C

1PPS sync: disabled

9.5.6 DC Power Consumption: SE868K3-Ax

Supply voltages: 3.3 VDC nominal

SBAS: enabled 1PPS sync: enabled

Table 9-10 SE868K3-Ax Power Consumption

9.5.7 DC Power Consumption: SE868K7-Ax

Supply voltages: 3.3 VDC nominal

SBAS: not supported

Table 9-11 SE868K7-Ax Power Consumption

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

RX0, RX1, Reset-N

Signal

Symbol

Min

Typ

Max

Units

Input Voltage (L)

Vil 0

0.5

Input Voltage (H)

1.9 3.4

Note: These inputs have an internal pullup of 40 kΩ to 190 kΩ.

Do not drive the Reset-N line high.

Force_On

Signal

Symbol

Min

Typ

Max

Units

Input Voltage (L)

Vil 0

0.275

Input Voltage (H)

0.825

3.4

Note: Force_On has no pullup or pulldown.

For typical applications, use a pulldown of 10k Ω.

TX0, TX1, and 1PPS

Signal

Symbol

Min

Typ

Max

Units

Output Voltage (L)

0.4

Output Voltage (H)

2.14

2.89

Normal Current (L)

-2

Output Current (H)

-2

9.6 Control and Status Signals

9.6.1 I/O Signal Levels

Note that I/O voltage ranges are different from supply voltages V

Several different logic levels are utilized by the digital signal interfaces of the module:

9.6.1.1 Logic Levels – Inputs

Table 9-12 Input Logic Levels: RX and Reset-N

and V

BATT

Table 9-13 Input Logic Levels: Force_On

9.6.1.2 Logic Levels – Outputs

Table 9-14 Output Logic Levels: TX and 1PPS

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SE868Kx-Ax Family Product User Guide Electrical Interface

9.6.2 Control and Input Signals

9.6.2.1 RESET-N

The Reset-N input is a low true input to reset the receiver to the default starting state. This signal is not required for the module to operate properly, so this pin may be left unconnected.

However, it is recommended to bring it out to a test point. If used the signal can only be driven low, never high since it has an internal pullup. The logic levels are shown in Table 9-12 Input Logic Levels: RX and Reset-N

9.6.2.2 FORCE_ON (SE868-A and SE868K3-Ax only)

For typical operation, connect this pin through a 10 K

Ω resistor to g round t o creat e a pull down

(which will prevent noise from accidentally activating this pin).

Upon command, the module will enter the backup (low power) state. To exit this state, drive the Force-on signal high (true) to f orce the module to return to t he full power state.

Force-on should be held high until the PMTK101 m essage is received (about 1 second), then released to logic low.

If Force-on is high when a low-power command is received, the module will enter the Standby (stop) state rather than the Backup state, since the PMU is still on.

This signal is only available on the SE868-A and SE868K3-Ax modules.

Note that this pin has a maximum input voltage of 3.4 V (which is lower than the max for Vcc or Vbatt).

Logic levels are shown in Table 9-13 Input Logic Levels: Force_On.

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

Figure

9.6.3 Output Signals

9.6.3.1 1PPS

1PPS is a one pulse per output second signal. Its d efault characteristics are:

• Pulse duration: 100 ms

• Active: during 3D navigation.

The pulse availability and duration can be configured via the $PMTK285 command. Options for availability are:

• Disable

• After 1

• 3D Fix only

• 2D/3D Fix only

• Always.

NMEA output (timestamp) can be configured to have a fixed latency behind the 1PPS pulse of 460 to 485 ms via the $PMTK255 command. Default is variable latency.

fix

9-2 1PPS NMEA Synchronization

These configurations will not be preserved across a power cycle or reset. 1PPS is disabled if the fix rate > 1 Hz. Variation is

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≈ 30 ns (1 σ).

SE868Kx-Ax Family Product User Guide Electrical Interfac e

9.7 Serial I/O Ports

Port 0: All modules include a primary UART serial port (TX0 / RX0). Port 1: The secondary port on MT3333-based modules is I2C by def ault, but can be c hange d to UART (TX1/RX1) or SPI via command. The module will reset when the interface is changed.

The secondary port on MT3337-based modules is UART (TX1 / RX1) and cannot be changed.

9.8 Port Usage

9.8.1 Primary (Port 0) Usage

TX0: NMEA message output RX0: NMEA proprietary commands, RTCM SC-104 input and EPO data

TX0 / RX0 is also used to re-flash the module (MT3333-based modules only).

9.8.2 Secondary (Port 1) Usage

TX1: NMEA message output RX1: DGPS input using the RTCM SC-104 protocol and NMEA commands.

C and SPI support the same data streams as UART.

The interface is selected via the $PMTK258 command. Note that the module will reset when the interface is changed.

9.8.3 UART Port Operation

UART ports are full-duplex and support configurable baud rates. Frame is 8 bits, no parity bit, and 1 stop bit.

The default rate of 9600 bps can be changed via the following commands - Primary port: $PMTK251 Secondary port: $PMTK250

The idle state of UART interface lines is logic high. UART TX logic levels are shown in Table 9-14 Output Logic Levels: TX and 1PPS. UART RX logic levels are shown in Table 9-12 Input Logic Levels: RX and Reset-N

Note that the RX pins have a maximum input voltage of 3.4 V (which is lower than the maximum for Vcc or Vbatt). Care must be used to prevent backdriving the R X lines when the module is p owered down or in a low-power state.

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SE868Kx-Ax Family Product User Guide Electrical Interfac e

9.8.4 I2C Port Operation (MT3333-based modules only)

MT3337-based modules do not support I2C interface. MT3333-based modules 2

seria l port (por t 1) is conf igured to us e the I2C interface by default

but can be changed to UART or SPI via command: $PMTK258

The I

C_Clock and I2C_Data lines require external pullups (example value: 10 KΩ).

Features -

• Slave mode only (default address = 0x10)

• Fast mode (up to 400 Kbps)

• 7-bit address

• 255-byte buffer

• The module operates in the polled mode (with the host as the master)

• Data Ready Indicator

Transmit The host must be able to read several packets each report cycle. A minimum pause of 2 ms is required between reads to allow the module to fill the buffer. A longer delay is permissible. For example, if the report cycle is 1 second, set the polling sleep time to 500 ms for the next output interval to start. The buffer will contain up to 254 data bytes plus an <LF> (x’0A”) character. Each NMEA sentence will be terminated by the (standard) <CR-LF> (x’0D, x’0A’) characters, and a NMEA sentence can span buffers. If necessary, the buffer is padded with x’0A’ characters. x’0A’ is also used for idle characters.

Receive The maximum length for commands sent to the module.is 255 bytes. A minimum of 10 ms is required between packets.

Further details and sample code are available under NDA from the MediaTek MT3339/MT3333

C Application Note.

9.8.5 SPI Port Operation (MT3333-based modules only)

The MT3333-based modules support SPI interface on the 2nd port via command PMTK258.

• Data rate = 700 kbit/s

• Slave mode only.

Two methods are supported for the host to receive NMEA messages: Polling mode and Interrupt mode.

During a SPI transmission, data is transmitted (shifted out serially) and received (shifted in serially) simultaneously by the module. If no data is ready to be transmitted, the host ( master) still needs to send padding bytes. It is suggested to set the value of the padding byte to “0xFF” since the module will ignore these padding bytes.

Further details and sample code are available under NDA from the MediaTek MT3339/MT3333 SPI Application Note.

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SE868Kx-Ax Family Product User Guide RF Front-end Design

10 RF FRONT-END DESIGN

10.1 RF Signal Requirements

The receiver can achieve Cold Start acquisition with a signal level above the specified minimum at its input. This means that it can acquire and track visible satellites, download the necessary navigation data (e.g. time and ephemeris) and compute its position within a period of 5 minutes. In the GNSS signal acquisition process, decoding the navigation message d ata is the most difficult task, which is why Cold Start acquisition requires a higher signal level than navigation or tracking. For the purposes of this discussion, autonomous operation is assumed, which makes the Cold Start acquisition level the dominant design constraint. If assistance data in t he form of time and/or ephemeris aiding is available, acquisition can be accomplished at lower signal levels.

The GPS signal is defined by the Interface Specification IS-GPS-200. This document states that the signal level received by a linearly polarized antenna having 3 dBi gain will be a minimum of

-130 dBm when the antenna is in the worst-case orientation and the satellite is 5 degrees or more above the horizon.

In actual practice, the GPS satellites transmit slightly more power than specified, and the signal level typically increases if a satellite has higher elevation angles.

The GLONASS signal is defined by GLONASS ICD (currently 2008 Version 5.1). This document states that the power level of the received RF signal from a GLONASS satellite at the output of a 3dBi linearly polarized antenna is not less than -131dBm for L1 sub-band provided that the satellite is observed at an angle of 5 degrees or more above the horizon.

The receiver will display a reported C/No of 40 dB-Hz for a GPS signal level of -130 dBm at the RF input, assuming a SEN (system equivalent noise) of the receiver of 4 dB. System Equivalent Noise includes the Noise Figure of the receiver plus signal processing or digital noise. For an equivalent GLONASS signal level, t he GLONASS signal will report a C/No of approximately 39 dB-Hz. This is due to the receiver’s higher losses (NF) for GLONASS signals and a higher signal processing noise for GLONASS signals.

Each GNSS satellite presents its own signal to the receiver, and best performance is obtained when the signal levels are between -130 dBm and -125 dBm. These received signal levels are determined by:

• Satellite transmit power

• Satellite elevation angle

• Free space path loss

• Extraneous path loss (e.g. rain)

• Partial or total path blockage (such as foliage or buildings)

• Multipath interference (caused by signal reflection)

• GNSS antenna characteristics

• Signal path after the GNSS antenna

The GNSS signal is relatively immune to attenuation from rainfall. However, it is heavily influenced by attenuation due to foliage (such as tree canopies, etc.) as well as outright bl oc kage caused by buildings, terrain or other objects near the line of sight to each specific GNSS satellite. This variable attenuation is highly dependent upon satellite location. If enough satellites are blocked, say at a lower elevation, or all in one general direction, the geometry of the remaining satellites will be worse (higher DOP) and will geometry effect in the form of PDOP, HDOP and VDOP numbers.

result in a lower position accuracy. The receiver reports this

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SE868Kx-Ax Family Product User Guide RF Front-end Design

SE868K3-A

9 x 9 x 4 mm

GPS, Galileo, GLONASS

SE868K3-AL

SE868K7-A

SE868K7-AL

9 x 9 x2 mm

GPS

For example, in a vehicular application, the GNSS antenna may be placed on the dashboard or rear package tray of an automobile. The metal roof of the vehicle will cause significant blockage, plus any thermal coating applied to the vehicle glass can attenuate the GNSS signal by as much as 15 dB. Again, both of these factors will affect the performance of the receiver.

Multipath interference results when the signal from a particular satellite is reflected from a surface (e.g. a building or the roof of a car) and is received by the GNSS antenna either in addition to or in place of the line of sight signal. The reflected signal has a path length that is longer than the line of sight path and can either attenuate the ori ginal signal, or, i f received in place of the original signal, can add error in determining a solution because the distance to the particular satellite is actually shorter than measured. It is this phenomenon (as well as the partial sky obscuration) that makes GNSS navigation in urban canyons (narrow roads surrounded by high rise buildings) so challenging. In general, the reflect ion of a GNSS signal causes its polarization to reverse. The implications of this are covered in the next section.

10.2 GNSS Antenna (included in the m odule)

The SE868xx-Ax modules include a SMT 9 x 9 mm cera mic patch antenna shown in the following table:

Module Antenna Constellations supported

9 x 9 x2 mm GPS, Galileo , GLONASS 9 x 9 x4 mm GPS

Table 10-1 Supported Constellations

In order to optimize antenna performance, it is strongly recommended to design a 30mm by 30mm ground plane under the module on the application PCB.

If the ground plane size is smaller than 30x30mm, center frequency detuning may occur.

Please refer to Section 10.3 Ground Plane for deta ils.

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SE868Kx-Ax Family Product User Guide RF Front-end Design

10.3 Ground Plane

It is recommended to include a 30 m m by 30 mm (square) ground plane around the module in the PCB design as shown below in order to optimize antenna performance.

The ground plane should be on the top layer of the PCB (directly under the module) with the module centered on it.

Please refer to Section 10.2 GNSS Antenna (included in the module) for details.

Note: The ground plane should be continuous. There is no “keepout” area under the module.

Figure 10-1 SE868 Family Ground Plane

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SE868Kx-Ax Family Product User Guide RF Front-end Design

10.4 RF Interfere nc e

RF interference into the GNSS receiver tends to be the biggest problem when determining why the system performance is not meeting expectations. As men tioned earlier, the GNSS signals are at -130 dBm and lower. If signals higher than this are presented to the receiver, the RF front end can be overdriven. The receiver can reject CW jamming signals in each band (GPS and GLONASS), but would still be affected by non-CW signals.

The most common source of interference is digital noise, often created by the fast rise and fall times and high clock speeds of modern digital circuitry. For example, a popul ar netbook computer uses an Atom processor clocked at 1.6 GHz. This is only 25 MHz away from the GNSS signal, and depending upon temperature of the SAW filter, can be within its passband. Because of the nature of the address and data lines, this would be broadband digital noise at a relatively high level.

Such devices are required to adhere to a regulatory standard for emissions such as FCC Part 15 Subpart J Class B or CISPR 22. However, these regulatory emission levels are far higher than the GNSS signal.

10.5 Shielding

Shielding the RF circuitry generally is ineffective because the interference is received by the GNSS antenna itself, which is the most sensitive portion of the RF path. The antenna cannot be shielded because it could not then receive the GNSS signals.

There are two solutions, one is to move the antenna away from the source of interference, and the other is to shield the digital interference source to prevent it from getting to the antenna.

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SE868Kx-Ax Family Product User Guide Reference Design

11 REFERENCE DESIGN

Figure 11-1 SE868 Family Reference Design

Along with power and grounds, the minimum signals required to operate the receiver properly are the RF input signal and two digital I/O signals (TX0 and RX0).

TX and RX are UART lines with a default of 9600-8-N-1. They are used for message output and command input. Be careful not to drive the RX line if the module is turned off.

Please refer to Section 9 Electrical Interface for important deta i ls.

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SE868Kx-Ax Family Product User Guide Mechanical Drawings

12 ME CHANICAL DRAW IN GS

Figure 12-1 SE868 Family (low profile) Mechanical Drawing

Figure 12-2 SE868 Family (high profile) Mechanical Drawing

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SE868Kx-Ax Family Product User Guide PCB Footprint

13 PCB FOOTPRINT

Figure 13-1 SE868 Family Footprint

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SE868Kx-Ax Family Product User Guide Packaging and Handling

Key

Description

Telit logo

14 PACKAGING AND HANDLING

14.1 Product Marki ng and Serialization

The SE868xx-A module label has a 2D Barcode identifying the module and its serial number. Contact a Telit representative for information on specific module serial numbers.

Figure 14-1 Product Label

2 Product Name 3

Telit Serial Number barcode (type 2D datamatrix) 11 digit (base 36 – 0 to 9 followed by A to Z)

Figure 14-2 SE868 Family Label Description

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SE868Kx-Ax Family Product User Guide Packaging and Handling

14.2 Product Packaging

SE868xx-Ax modules are shipped in Tape and Reel form. The reeled modules are shipped in 24mm mini r eels with 250 units per reel. Each reel is ‘dry’ packaged and vacuum sealed in a Moisture Barrier Bag (MBB) with two silica gel packs and placed in a carton.

The minimum order quantity for shipping is 250 units. All packaging is ESD protec tive lined. The SE868-A/AS receivers are Moisture Sensitive Devices (MSD). Please follow the MSD and

ESD handling instructions on the labels of the MBB and exterior carton.

Figure 14-3 SE868 Family - Tape Reel

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SE868Kx-Ax Family Product User Guide Packaging and Handling

Figure 14-4 SE868 Family - Tape Detail

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SE868Kx-Ax Family Product User Guide Packaging and Handling

14.3 Moisture Sensitivity

Precautionary measures are required in handling, storing and using these electronic devices to avoid damage from moisture absorption. If localized heating is required to rework or repair the device, precautionary methods are required to avoid exposure to solder reflow temperatures that can result in performance degradation or damage.

The module has a moisture sensitivity level rating of 3 as defined by IPC/JEDEC J-STD-

020. This rating is assigned due to some of the components used within the module.

Please follow the MSD and ESD handling instructions on the labels of the MBB and exterior carton.

The modules are supplied in a hermetically sealed bag with desiccant and humidity indicator cards. The parts must be placed and reflowed within 168 hours of first opening the hermetic seal provided the factory conditions are less than 30°C and less than 60% and the humidity indicator card indicates less than 10% relative humidity.

If the package has been opened or the humidity indicator card indicates above 10%, then the parts will need to be baked prior to reflow. The pa rts may be ba ked at +125°C ± 5 °C for 48 hou rs.

However, the packaging materials (tape and reel or trays) can NOT withstand that temperature.

Lower temperature baking is feasible if the humidity level is low and time is available.

Additional information can be found on the MSL tag affixed to the outside of the hermetically sealed bag and IPC/JEDEC J-STD-033.

NOTE: JEDEC standards are available free of charge from the JEDEC website

http://www.jedec.org.

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SE868Kx-Ax Family Product User Guide Packaging and Handling

Figure 14-5 Moisture Sensitive Device Label

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SE868Kx-Ax Family Product User Guide Packaging and Handling

14.4 ESD Sensitivity

The modules contain class 1 devices and are Electro-Static Discharge Sensitive ( ES DS).

Telit recommends the two basic principles of protecting ESD devices from damage:

• Handle sensitive components only in an ESD Protected Area (EPA) under protected and

controlled conditions;

• Protect sensitive devices outside the EPA using ESD protective packaging.

All personnel handling ESDS devices have the responsibility to be aware o f the ESD threat to the reliability of electronic products.

Further information can be obtained from the JEDEC standard JESD625-A Requirements for Handling Electrostatic Discharge Sensitive (ESDS) Devices”, which can be downloaded free of charge f rom: www.jedec.org

14.5 Assembly Considerations

Since the module contains piezo-electric components, it should be placed near the en d of the assembly process to minimize mechanical shock to it.

During board assembly and singulation process steps, pay careful attention to unwanted vibrations, resonances and mechanical shocks, e.g. those introduced by manufacturing equipment.

14.6 Washing Considerations

After assembly, the module can be washed with de-ionized water using standard PCB cleaning procedures. The shield does not provide a water seal to the internal components of the module, so it is important that the module be thoroughly dried prior to use by blowing excess water and then baking the module to drive residual moisture out. Depending upon the board cleaning equipment, the drying cycle may not be sufficient to thorou ghly dry the module, so additional steps may need to be taken. The exact process details will need to be determined by the type of washing equipment as well as other components on the bo ard to which the module is attached. The module itself can withstand standard JEDEC baking procedures

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SE868Kx-Ax Family Product User Guide Packaging and Handling

14.7 Reflow

The modules are compatible w ith lead free soldering processes as de fined in IPC/JEDEC J-STD-

020. The reflow profile must not exceed the profile given IPC/JEDEC J-STD-020 Table 5-2, “Classification Reflow Profiles”.

Although IPC/JEDEC J-STD-020 allows for thr ee reflows, the assembly process for the module uses one of those profiles, therefore the module is limited to two reflows.

When re-flowing a dual-sided SMT board, it is important to reflow the side containing the module last. This prevents heavier components within the module from becoming dislodged if the solder reaches liquidus temperature while the module is inverted.

Note: JEDEC standards are available free from the JEDEC website http://www.jedec.org The recommended reflow profile is shown in the following figure:

Figure 14-6 SE868 Family Recommended Reflow Profile

Please note that the JEDEC document includes important information in addition to the above figure. Please refer to: http://www.jedec.org/sites/default/files/docs/jstd020d-01.pdf

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SE868Kx-Ax Family Product User Guide Packaging and Handling

14.8 Safety

Improper handling and use of this module can cause permanent damage to the receiver. There is also the possible risk of personal injury from mechanical trauma or choking hazard.

Please refer to Section 17 Safety Recommendations for further safety recommendations.

14.9 Disposal

Telit recommends that this product should not be treated as household waste. For more detailed information about recycling this product please contact your local waste management authority or the reseller from whom you purchased the product.

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SE868Kx-Ax Family Product User Guide Environmental Re qui r ements

Temperature

-40°C to +85°C

Temperature Rate of Change

±1°C / minute maximum

Up to 95% non-condensing or a wet bulb temperature of +35°C, whichever is less

Maximum Vehicle Dynamics

600 m/sec (acquisition and navigation) 2G acceleration

Temperature

-40°C to +85°C

Up to 95% non-condensing or a wet bulb temperature of +35°C, whichever is less

Shock

18 G peak, 5 millisecond duration

Shock (in shipping container)

10 drops from 75 cm onto concrete floor

15 ENVIRONMENTAL REQUIREMENTS

15.1 Operating Environmental Li mi t s

Humidity

Table 15-1 SE868 Family Operating Environmental Limits

15.2 St orage Environmental Limits

Humidity

Table 15-2 SE868 Family Storage Environmental Limits

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SE868Kx-Ax Family Product User Guide Compliances

16 COMPLIANCES

The modules comply with the following:

• Directive 2011/65/EU art. 16 on the restriction of the use of certain hazardous

substances in electrical and electronic equipment (RoHS)

• Manufactured in an ISO 9001: 2008 accredited facility

• Manufactured to TS 16949:2009 requirements

• Directive 2014/53/EU Radio Equipment Directive (RED)

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SE868Kx-Ax Family Product User Guide Compliances

16.1 EU (RED) Declarations of Conformity

Figure 16-1 SE868-A EU RED Declaration of Conformity

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SE868Kx-Ax Family Product User Guide Compliances

Figure

16-2 SE868-AS EU RED Declaration of Conformity

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SE868Kx-Ax Family Product User Guide Compliances

Figure 16-3 SE868K3-A EU RED Declaration of Conformity

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SE868Kx-Ax Family Product User Guide Compliances

Figure 16-4 SE868K3-AL EU RED Declaration of Conformity

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SE868Kx-Ax Family Product User Guide Compliances

Figure 16-5 SE868K7-A EU RED Declaration of Conformity

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SE868Kx-Ax Family Product User Guide Compliances

Figure 16-6 SE868K7-AL EU RED Declaration of Conformity

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SE868Kx-Ax Family Product User Guide Safety Recommendations

17 SAFETY RECOMMENDATIONS

PLEASE READ CAREFULLY

Be sure that the use of this product is allowed in the country and in the environment required. The use of this product may be dangerous and must be avoided in the following areas:

• Where it can interfere with other electronic devices in environments such as hospitals,

airports, aircraft, etc.

• Where there is risk of explosion such as gasoline stations, oil refineries, etc.

It is the responsibility of the user to enforce the country regulations and specific environmental regulations.

Do not disassemble the product. Evidence of tampering will invalidate the warranty.

• Telit recommends following the instructions in product user guides for correct installation

of the product.

• The product must be supplied with a stabilized voltage source and all w iring must conform

to security and fire prevention regulations.

• The product must be handled with care, avoiding any contact with the pins because

electrostatic discharges may damage the product itself.

Since the modules are intended to be built-in, the system integrator is responsible for the functioning of the final product; therefore, care must be taken with components external to the module, as well as for any project or installation issue. Should there be any doubt, please refer to the technical documentation and the regulations in force. The integrator must take adequate precautions to avoid electrical, mechanical, and fire hazards.

Non-antenna modules must be equipped with a proper antenna with specific characteristics. The European Community provides some Directives for electronic equipment introduced on the

market. All the relevant information is available on the European Community website:

http://ec.europa.eu/enterprise/sectors/rtte/documents/

The text of the Directive 99/05 regarding telecommunication equipment is available, while the applicable Directives (Low Voltage and EMC) are available at:

http://ec.europa.eu/enterprise/sectors/electrical/

The power supply used shall comply the clause 2.5 (Limited power sources) of the EN 60950-1 standard and the module shall be mounted on a PCB w hich complies with V-0 flammability class.

Since the module must be built-in to a system, it is intended only for installation in a RESTRICTED ACCESS LOCATION. Therefore, the system integrator mus t provide an en closure which protects against fire, electrical shock, and mechanical shock in accordance with relevant standards.

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SE868Kx-Ax Family Product User Guide Glossary and Acronyms

18 GL O SS ARY AND ACR O NYMS

AGPS: Assisted (or Aided) GPS

AGPS provides ephemeris data to the receiver to allow faster cold start times than would be possible using only broadcast data. This extended ephemeris data could be either server-generated or locally-generated. Please refer to Local Ephemeris prediction data and Server-based Ephemeris prediction data

Almanac:

A reduced-precision set of orbital parameters for the entire GPS constellation that allows calculation of approximate satellite positions and velocities. The almanac may be used by a receiver to determine satellite visibility as an aid during acquisition of satellite signals. The almanac is updated weekly by the Master Control Station. Please refer to Ephemeris.

BeiDou (BDS) - forme rly COM P ASS: The Chinese GNSS, currently being expanded towards full operational capability.

Cold Start:

A cold start occurs when a receiver be gins operation with un known position, time, and epheme ris data, typically when it is powered up after a period on inactivity. This typically occurs at power up or being sent a restart command. Almanac information may be used to identify previously visible satellites and their approximate positions. Please refer to Restart.

Cold Start Acquisition Sensitivity:

The lowest signal level at which a GNSS receiver is able to reliably acquire satellite signals and calculate a navigation solution from a Cold Start. Cold start acquisition sensitivity is limited by the data decoding threshold of the satellite messages.

EGNOS: European Geostationary Navigation Overlay Service The European SBAS system.

Ephemeris (plural ephemerides): A set of precise orbital parameters that is used by a GNSS receiver to calculate satellite position and velocity. The satellite position is then used to calculate the navigation solution. Ephemeris data is updated frequently (normally every 2 hours for GPS) to maintain the accuracy of the position calculation. Please refer to Almanac.

ESD: Electro-Static Discha rge Large, momentary, unwanted electrical currents that can cause damage to electronic equipment.

GAGAN: The Indian SBAS system.

Galileo:

The European GNSS currently being built by the European Union (EU) and European Space Agency (ESA).

GDOP: Geometric Dilution of Precision A factor used to describe t he effect of satellite geometry on the accuracy of t he time and position solution of a GNSS receiver. A lower value of GDOP indicates a smaller error in the solution. Related factors include PDOP (position), HDOP (horizontal), VDOP (vertical) and TDOP (time).

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SE868Kx-Ax Family Product User Guide Glossary and Acronyms

GLONASS: ГЛОбальная НАвигационная Спутниковая Система

GLObal'naya NAvigatsionnaya Sputnikovaya Sistema (Global Navigation Satellite System) The Russian GNSS, which is operated by the Russian Aerospace Defense Forces

GNSS: Global Navigation Satellite System Generic term for a satellite-based navigation system with global coverage. The current or planned systems are: GPS, GLONASS, BDS, and Galileo.

GPS: Global Positioning System The U.S. GNSS, a satellite-based positioning system that provides accurate position, velocity, and time data. GPS is operated by the US Department of Defense.

Hot Start:

A hot start occurs when a receiver begins operation with known time, position, and ephemeris data, typically after being sent a restart command. Please refer to Restart.

LCC: Leadless Chip Carrier A module design without pins. In place of the pins are pads of bare gold-plated copper that are soldered to the printed circuit board.

LNA: Low Noise Amplifier An electronic amplifier used for very weak signals which is especially designed to add very little noise to the amplified signal.

Local Ephemeris prediction data:

Extended Ephemeris (i.e. predicted) data, calculated by the receiver from broadcast data received from satellites, which is stored in memory. It is usually useful for up to three days. Please refer to AGPS.

MSAS: MTSAT Satellite Augmentation System The Japanese SBAS system.

MSD: Moisture sensitive device. MTSAT: Multifunctional Transport Satellites

The Japanese system of geosynchronous satellites used for weather and aviation control. Navigation Sensitivity: The lowest signal level at which a GNSS receiver is able to reliably

maintain navigation after the satellite signals have been acquired.

NMEA: National Marine Electronics Association QZSS: Quasi-Zenith Satellite System

The Japanese regional system (part of MSAS). Reacquisition: A receiver, while in normal operation, loses RF signal (perhaps due to the

antenna cable being disconnected or a vehicle entering a tunnel), and re-establishes a valid fix after the signal is restored. Contrast with Reset and Restart.

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SE868Kx-Ax Family Product User Guide Glossary and Acronyms

Restart: A receiver beginning operation after being sent a restart command, generally used for testing rather than normal operation. A restart can also result from a power-up. Please refer to Cold Start, Warm Start, and Hot Start. Contrast with Reset and Reacquisition. Reset: A receiver beginning operation after a (hardware) reset signal on a pin, generally used for testing rather than normal operation. Contrast with Restart and Reacquisition.

RoHS: The Restriction of Hazardous Substances

Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment, which was adopted in February 2003 by the European Union.

RTC: Real Time Clo ck An electronic device (chip) that maintains time continuously while powered up.

SAW: Surface Acoustic Wave filter Electromechanical device used in radio frequency applications. SAW filters are useful at frequencies up to 3 GHz.

SBAS: Satellite Based Augmentation System A system that uses a network of ground stations and geostationary satellites to provide differential corrections to GNSS receivers. These corrections are transmitted on the same frequency as navigation signals, so the receiver can use the same front-end design to process them. Current examples are WAAS, EGNOS, MSAS, and GAGAN.

Server-based Ephemeris prediction data:

Extended Ephemeris (i.e. predicted) data, calculated by a server and provided to the receiver over a network. It is usually useful for up to 14 days. Please refer to AGPS.

TCXO: Temperature-Compensated Crystal Oscillator Tracking Sensitivity:

The lowest signal level at which a GNSS receiver is able to maintain tracking of a satellite signal after acquisition is complete.

TTFF: Time to First Fix The elapsed time required by a receiver to achieve a valid position solution from a specified starting condition. This value will vary with the operating state of the receiver, the length of time since the last position fix, the location of the last fix, and the specific receiver design. A standard reference level of -130 dBm is used for testing.

UART: Universal Asynchronous Receiver/Transmitter An integrated circuit (or part thereof) which provides a serial communication port for a computer or peripheral device.

WAAS: Wide Area Augmentation System The North American SBAS system developed by the US FAA (Federal Aviation Administration).

Warm Start:

A warm start occurs when a receiver begins operation with known (at least approximately) time and position, but unknown ephemeris data, typically after being sent a restart command.. Please refer to Restart.

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SE868Kx-Ax Family Product User Guide Document History

Revision

Date

Changes

2015-02-11

First edition

2015-10-19

Removed BeiDou reference from § 2.1, 2.2, 5.1, 5.2

2017-03-09

Added SE868Kx-Ax modules and comparison/migration

Sensitivity values are preliminary.

2018-03-12

QZSS default is “disabled”

Minor text revisions

2018-07-20

“Always Locate” is not available on (enhanced) MT3337E

Minor text and formatting revisions

19 DOCUMENT HISTORY

information Revised mechanical drawings Deleted reference to SMPS Added reference diagram Corrected pinout diagram: Pins RX1 and TX1 were swapped.

Added new module photos Added RTCM Version & Message types Removed restriction of RTCM data over I

C Updated Vcc voltage range Added diagrams: EASY, Jamming, GLP, Periodic, Always Loc Added power management command summary table Added configuration command references Added 1PPS information Rearranged I Changed MT3333-based 2

C information

port default configuration to I2C Corrected some information about the Force-On pin usage Corrected commands for Backup and Standby modes Corrected commands for Periodic Low Power modes Added information on the new GLP low-power mode Corrected checksum on the $PMTK161,1 command Rearranged Electrical Interface information Updated to EU RED Declarations of Conformit y

SBAS ranging is not supported Added reference to SE878Kx-Ax (larger) modules I/O second port description has changed Added pin 28 : Data Ready Indicator Removed restriction prohibiting fast-discharge LDO Changed pinout diagram to Top View Reorganized I/O Signal section

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Mod. 0815

2016-08 Rev.1

Telit Wireless Solutions SE868-A, SE868-AS, SE868K3-A, SE868K7-A, SE868K3-AL Product User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

NOTICES

COPYRIGHTS

COMPUTER SOFTWARE COPYRIGHTS

USAGE AND DISCLOSURE RESTRICTIONS

PRODUCT APPLICABILITY

CONTENTS

TABLES

FIGURES

1 INTRODUCTION

1.1 Purpose

1.2 Contact and Support Information

1.3 Related Documents and Downloads

1.3.1 Related Documents and downloads

1.3.2 Related Documents Requiring a Non-Disclosure Agreement

1.4 Text Conventions

2 PRODUCT DESCRIPTION

2.1 Product Overview

2.2 SE868xx-A Product Naming

2.3 Product Variants

2.3.1 Multi-constellation modules (SE868-A and SE868K3-Ax) features

2.3.2 GPS-only modules (SE868-AS and SE868K7-Ax) features

2.3.2.1 ROM Features (SE868-AS and SE868K7-Ax modules)

Related Products

2.4 Block Diagrams

2.4.1 Early Production

2.4.2 Current Production

2.5 Module Photos

3 EVALUATION BOARD (EVB)

4 PRODUCT FEATURES

4.1 Built-in Antenna

4.2 Multi-Const e ll a ti on Na vi ga t ion (SE868-A and SE868K3-Ax only).

4.3 Quasi-Zenith Satellite System (QZSS)

4.4 Satellite-Based Augmentation System ( S BAS)

4.4.1 SBAS Corrections

4.5 Differential GPS (DGPS)

4.6 Assisted GPS (AGPS)

4.6.1 Locally-generated AGPS - Embedded Assist System (EASY)

4.6.2 Server-generated AGPS - Extended Prediction Orbit (EPO)

4.6.3 Host EPO

4.7 Elevation Mask Angle

4.8 Static Navigation

4.9 Jamming Rejection – Active Interference Cancellation (AIC)

4.10 Internal LNA (SE868Kx-A/AL modules only)

4.11 10 Hz Navigation

4.12 1PPS

4.13 Serial I/O Ports

4.14 Power Management Modes

4.14.1 Full Power Continuous Mode

4.14.2 Backup Mode (Perpetual) (SE868-A and SE868K3-Ax only)

4.14.3 Standby Modes

4.14.4 GLP Mode (SE868-A and SE868K3-Ax only)

4.14.5 Periodic Modes (SE868-A and SE868K3-Ax only)

4.14.6 AlwaysLocate™ Modes (SE868-A and SE868K3-Ax only)

5 DATA RE TE NT ION

6 PRODUCT PERFORMANCE

6.1 Horizontal Position Accuracy

6.2 Time to First Fix

6.3 Sensitivity

6.4 Jamming Mitigation Per f orm a nc e exam ple

7 MESSAGE INTERFACE

7.1 NMEA Output Messages

7.1.1 Standard Messages

7.1.2 Proprietar y Output Messages

7.2 NMEA Input Commands

7.2.1 NMEA Commands List

8 FLASH UPGRAD ABILITY

9 ELECTRICAL INTERFACE

9.1 SE868-A Family Pinout Diagram

9.3 SE868-A Module Pinout Tables

9.3.1 SE868-A Pinout Table

9.3.2 SE868-AS Pinout Table

9.3.3 SE868K3-A Pinout Table

9.3.4 SE868K7-A Pinout Table

9.4 SE868-Ax to SE868Kx-Ax Comparison and Migration

9.4.1 SE868-A and SE868K3-Ax Pinout Comparison

9.4.2 SE868-AS and SE868K7-Ax Pinout Comparison