Summary of Contents for Telit Wireless Solutions SE868K A Series
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SE868Kx-Ax Family Product User Guide 1VV0301201 Rev. 2 2017-04-03...
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.
SE868Kx-Ax Family Product User Guide Notices USAGE AND DISCLOSURE RESTRICTIONS 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.
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SE868Kx-Ax Family Product User Guide Contents 4.4.3 Host EPO (SE868-AS and SE868K7-A series only) ........22 Differential GPS (DGPS) ..................22 Elevation Mask Angle ................... 22 Static Navigation ....................22 Jamming Rejection – Active Interference Cancellation (AIC) ........ 23 Internal LNA (SE868Kx-A/AL modules only) ............23 4.10 10 Hz Navigation ....................
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SE868Kx-Ax Family Product User Guide Contents 8.5.1 VCC ......................... 42 8.5.2 VBATT ......................42 8.5.3 DC Power Requirements ................. 42 8.5.4 DC Power Consumption: SE868-A ..............43 8.5.5 DC Power Consumption: SE868-AS ..............44 8.5.6 DC Power Consumption: SE868K3-Ax ............45 8.5.7 DC Power Consumption: SE868K7-Ax ............
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SE868Kx-Ax Family Product User Guide Contents GLOSSARY AND ACRONYMS ................71 DOCUMENT HISTORY .................... 75 1VV0301201 Page 8 of 76 2017-04-03 Rev. 2...
SE868Kx-Ax Family Product User Guide Introduction INTRODUCTION Purpose The purpose of this document is to provide information regarding the function, features, and usage of the Telit products listed in Section 2.3 Product Variants. Please refer to that section for details of the members of the product family. Audience This document is intended for customer personnel who are responsible for design and implementation of a GNSS receiver system.
SE868Kx-Ax Family Product User Guide Introduction Text Conventions Dates are in ISO 8601 format, i.e. YYYY-MM-DD. Symbol Description Danger – This information MUST be followed or catastrophic equipment failure and/or bodily injury may occur. Caution or Warning – This is an important point about integrating the product into a system.
SE868Kx-Ax Family Product User Guide Product Description PRODUCT DESCRIPTION The SE868Kx-A GNSS antenna module family provides complete multi-constellation position, velocity, and time (PVT) engines featuring high performance, high sensitivity, and low power consumption. The inclusion of the GLONASS constellation (on selected models) yields better coverage, greater accuracy, and improved availability.
SE868Kx-Ax Family Product User Guide Product Description SE868xx-A Product Naming Figure 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-A series (ROM) GPS-only modules Product Variants Module...
SE868Kx-Ax Family Product User Guide Product Description 2.3.1 Multi-constellation modules (SE868-A and SE868K3-A series) features MediaTek MT3333 engine GPS, QZSS, and GLONASS satellite signals Flash memory with Upgradable firmware AGPS: Local (EASY) and server-based (EPO) Force-On pin ...
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SE868Kx-Ax Family Product User Guide Product Description 2.3.2.1 ROM Features (SE868-AS and SE868K7-A series modules) SE868-AS SE868-AS Feature (early production) SE868K3-Ax P/N SE868ASA210Rxxx P/N SE868ASA232Rxxx 3337E (enhanced) 3337E ROM version 3337 (enhanced) EASY SBAS AlwaysLocate LOCUS 1VV0301201 Page 16 of 76 2017-04-03 Rev.
SE868Kx-Ax Family Product User Guide Product Description Module Photos Figure 2-6 SE868xx-Ax Top View Figure 2-7 SE868xx-Ax Side View Note: All modules in the applicability table have a similar appearance. The SE868Kx-AL module is 2 mm shorter that the SE868-AS shown. 1VV0301201 Page 19 of 76 2017-04-03...
SE868Kx-Ax Family Product User Guide Evaluation Board (EVB) EVALUATION BOARD (EVB) The EVB contains the module mounted on a PC Board to facilitate testing. Please refer to the product Evaluation Board User Guide for detailed information. Figure 3-1 SE868xx-Ax Evaluation Board 1VV0301201 Page 20 of 76 2017-04-03...
SE868Kx-Ax Family Product User Guide Product Features PRODUCT FEATURES Multi-Constellation Navigation (SE868-A and SE868K3-A series only) GPS and GLONASS constellations are enabled by default. The user may enable or disable GPS and/or GLONASS constellations via command. Using GLONASS alone may not give optimum positioning results depending on the region where the receiver is located.
SE868Kx-Ax Family Product User Guide Product Features See Section 2.3 Product Variants for applicability. 4.4.2 Server-generated AGPS - Extended Prediction Orbit (EPO) (SE868-A and SE868K3-A series 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 serial port 1 (RX).
SE868Kx-Ax Family Product User Guide Product Features 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. 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.
SE868Kx-Ax Family Product User Guide Product Features 4.12 Serial I/O Port All modules include a primary UART serial port. The SE868-A and SE868K3-A series modules include two serial ports – the primary UART and a secondary I C port. Refer to the pinouts for port assignments The SE868-AS and SE868K7-A series modules include two UART ports.
SE868Kx-Ax Family Product User Guide Product Features 4.13 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.
SE868Kx-Ax Family Product User Guide Product Features 4.13.4 Periodic Mode This mode allows 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. Periodic mode is entered by sending the following NMEA command: $PMTK225 ,<Type>,<Run_time>,<Sleep_time>,<2 _run_time>,<2...
SE868Kx-Ax Family Product User Guide Product Performance PRODUCT PERFORMANCE Horizontal Position Accuracy Constellation CEP (m) ≤ 2.5 GLONASS ≤ 2.5 GPS + Glonass Test Conditions: 24-hr Static, Live signals, Full Power mode Note: SE868-AS and SE868K7-A series modules support GPS only Table 5-1 SE868xx-A Horizontal Position Accuracy Time to First Fix Constellations(s)
SE868Kx-Ax Family Product User Guide Software Interface SOFTWARE INTERFACE Serial I/O port (RX and TX 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 Software User Guide.
SE868Kx-Ax Family Product User Guide Software Interface The following table shows the Talker IDs used: Talker ID Constellation BeiDou Galileo GLONASS QZSS Table 6-3 NMEA Talker IDs 6.1.2 Proprietary Output Messages The receivers support several proprietary NMEA output messages which contain additional receiver data and status information.
SE868Kx-Ax Family Product User Guide Software Interface 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 is: $<command-ID>[,<parameters>]*<cr><lf>...
SE868Kx-Ax Family Product User Guide Flash Upgradability FLASH UPGRADABILITY (SE868-A and SE868K3-A series only) Note: The SE868-AS and SE868K7-A series 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 serial port TX/RX pins.
SE868Kx-Ax Family Product User Guide Electrical Interface ELECTRICAL INTERFACE SE868-A Family Pinout Diagram Figure 8-1 SE868-A Family Pinout Diagram Notes (See the detailed pinout tables below): 1. All Ground (GND) pins are to be grounded 2. Reserved pins (RES) are to be left floating 3.
SE868Kx-Ax Family Product User Guide Electrical Interface Signal Levels Several distinct logic levels are utilized by the digital signal interfaces of the module: 8.2.1 Logic Levels – Inputs RX, RX2, Reset-N, Force_On Signal Symbol Units Input Voltage (L) V ih Input Voltage (H) Note: These inputs have an internal pullup of 40 kΩ...
SE868Kx-Ax Family Product User Guide Electrical Interface SE868-A Module Pinout Tables 8.3.1 SE868-A Pinout Table SIGNAL TYPE DESCRIPTION LOGIC LEVEL Ground Ground Reserved Reserved. Do not connect Reserved Reserved. Do not connect Reserved Reserved. Do not connect No Connection Not connected Ground Ground Ground...
SE868Kx-Ax Family Product User Guide Electrical Interface 8.3.2 SE868-AS Pinout Table SIGNAL TYPE DESCRIPTION LOGIC LEVEL Ground Ground Reserved Reserved. Do not connect Reserved Reserved. Do not connect Reserved Reserved. Do not connect No Connection Not connected Ground Ground Ground Ground No Connection Not connected...
SE868Kx-Ax Family Product User Guide Electrical Interface 8.3.3 SE868K3-A Pinout Table SIGNAL TYPE DESCRIPTION LOGIC LEVEL Ground Ground Reserved EIT0 / GPIO12 Reserved GPIO9 Reserved Reserved. Do not connect No Connection Not connected Ground Ground Ground Ground No Connection Not connected Ground Ground UART0 Serial Output (Transmit)
SE868Kx-Ax Family Product User Guide Electrical Interface 8.3.4 SE868K7-A Pinout Table SIGNAL TYPE DESCRIPTION LOGIC LEVEL Ground Ground Reserved EIT0 / GPIO 12 on MT3333 Reserved GPIO9 on MT3333. Reserved Reserved. Do not connect No Connection Not connected Ground Ground Ground Ground No Connection...
SE868Kx-Ax Family Product User Guide Electrical Interface 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-A series SE868K3-Ax are the addition of SPI pins (which require a custom FW build) and the change of pin 18 from Reserved to No Connection.
SE868Kx-Ax Family Product User Guide Electrical Interface 8.4.1 SE868-A and SE868K3-Ax Pinout Comparison SE868K3-Ax SE868-A Signal Comparison Signal Ground Ground Reserved Reserved Reserved Reserved Reserved (DR-IN) Reserved No Connection No Connection Ground Ground Ground Ground No Connection No Connection Ground Ground HRST_B S_RESET...
SE868Kx-Ax Family Product User Guide Electrical Interface 8.4.2 SE868-AS and SE868K7-Ax Pinout Comparison SE868K7-Ax SE868-AS Signal Comparison Signal Ground Ground Reserved Reserved Reserved Reserved Reserved (DR_IN) Reserved No Connection No Connection = Ground Ground Ground Ground No Connection No Connection = Ground Ground HRST_B...
SE868Kx-Ax Family Product User Guide Electrical Interface DC Power Supply The modules have two power supply pins V and V BATT 8.5.1 VCC This is the main power input. The supply voltage must be in the range specified in Table 8-9 DC Supply Voltage below.
SE868Kx-Ax Family Product User Guide Electrical Interface 8.5.4 DC Power Consumption: SE868-A State & Constellation Units Acquisition GPS Only GPS and Glonass Navigation/Tracking GPS Only GPS and Glonass Low Power Mode GPS Only GPS and Glonass μW Battery Backup Operating temperature: 25°C Supply voltages: 3.3 VDC nominal Low Power mode: 500 ms duty cycle SBAS: enabled...
SE868Kx-Ax Family Product User Guide Electrical Interface 8.5.5 DC Power Consumption: SE868-AS State (GPS only) Units Acquisition Navigation/Tracking Low Power - Periodic Low Power – AlwaysLocate Standby μW Low Power - Backup Operating temperature: 25°C Supply voltages: 3.3 VDC nominal Low Power mode: 500 ms duty cycle SBAS: disabled 1PPS sync: disabled...
SE868Kx-Ax Family Product User Guide Electrical Interface 8.5.6 DC Power Consumption: SE868K3-Ax State & Constellation Units Acquisition GPS Only GPS and Glonass Navigation/Tracking GPS Only GPS and Glonass Low Power Mode GPS Only GPS and Glonass μW Battery Backup Operating temperature: 25°C Supply voltages: 3.3 VDC nominal Low Power mode: 500 ms duty cycle SBAS: enabled...
SE868Kx-Ax Family Product User Guide Electrical Interface 8.5.7 DC Power Consumption: SE868K7-Ax State (GPS only) Units Acquisition Navigation/Tracking Low Power - Periodic Low Power – AlwaysLocate Standby μW Low Power - Backup Operating temperature: 25°C Supply voltages: 3.3 VDC nominal Low Power mode: 500 ms duty cycle SBAS: disabled 1PPS sync: disabled...
SE868Kx-Ax Family Product User Guide Electrical Interface Control Signals 8.6.1 Input Signals 8.6.1.1 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, if used, the signal can only be driven low, never high since it has an internal pullup, for example, using an open-collector circuit.
SE868Kx-Ax Family Product User Guide Electrical Interface I/O Ports 8.7.1 UART 8.7.1.1 The TX serial data line outputs NMEA messages from the receiver to the host at a default rate of 9600 bps. When no serial data is being output, the TX data line idles high. When the module is powered down, do not back drive this or any other GPIO line.
SE868Kx-Ax Family Product User Guide Reference Design REFERENCE DESIGN Figure 9-1 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 (TX and RX). TX and RX are UART lines with a default of 9600-8-N-1.
SE868Kx-Ax Family Product User Guide RF Front-end Design 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.
SE868Kx-Ax Family Product User Guide RF Front-end Design result is a lower position accuracy. The receiver reports this geometry effect in the form of PDOP, HDOP and VDOP numbers. For example, in a vehicular application, the GNSS antenna may be placed on the dashboard or rear package tray of an automobile.
SE868Kx-Ax Family Product User Guide RF Front-end Design We can estimate a typical system noise figure of 4 dB for the module, consisting of the pre- select SAW filter loss, the LNA noise figure, and implementation losses within the digital signal processing unit.
SE868Kx-Ax Family Product User Guide RF Front-end Design 10.6 Ground Plane It is recommended to include a 30 mm by 30 mm 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.
SE868Kx-Ax Family Product User Guide Packaging and Handling PACKAGING AND HANDLING 13.1 Product Marking 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 13-1 Product Label Description Telit logo...
SE868Kx-Ax Family Product User Guide Packaging and Handling 13.2 Product Packaging SE868xx-Ax modules are shipped in Tape and Reel form. The reeled modules are shipped in 24mm reels 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.
SE868Kx-Ax Family Product User Guide Packaging and Handling 13.3 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.
SE868Kx-Ax Family Product User Guide Packaging and Handling 13.4 ESD Sensitivity The module contains class 1 devices and is Electro-Static Discharge Sensitive (ESDS). 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;...
SE868Kx-Ax Family Product User Guide Packaging and Handling 13.7 Reflow The modules are compatible with lead free soldering processes as defined 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 three reflows, the assembly process for the module uses two of those profiles, therefore the module is limited to one reflow.
SE868Kx-Ax Family Product User Guide Packaging and Handling 13.8 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 16 Safety Recommendations for further safety recommendations. 13.9 Disposal Telit recommends that this product should not be treated as household waste.
SE868Kx-Ax Family Product User Guide Environmental Requirements ENVIRONMENTAL REQUIREMENTS 14.1 Operating Environmental Limits Temperature -40°C to +85°C Temperature Rate of Change ±1°C / minute maximum Up to 95% non-condensing or a wet bulb Humidity temperature of +35°C, whichever is less 600 m/sec (acquisition and navigation) Maximum Vehicle Dynamics 2G acceleration...
SE868Kx-Ax Family Product User Guide Compliances COMPLIANCES The SE868xx-Ax modules comply with the following: Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS) Manufactured in an ISO 9000: 2008 accredited facility ...
SE868Kx-Ax Family Product User Guide Compliances 15.1 CE Declarations of Conformity Figure 15-1 SE868-A CE Declaration of Conformity 1VV0301201 Page 66 of 76 2017-04-03 Rev. 2...
SE868Kx-Ax Family Product User Guide Safety Recommendations 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: ...
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SE868Kx-Ax Family Product User Guide Glossary and Acronyms GLOSSARY AND ACRONYMS 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. See 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...
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SE868Kx-Ax Family Product User Guide Glossary and Acronyms GDOP: Geometric Dilution of Precision A factor used to describe the effect of satellite geometry on the accuracy of the time and position solution of a GNSS receiver. A lower value of GDOP indicates a smaller error in the solution.
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SE868Kx-Ax Family Product User Guide Glossary and Acronyms 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. Restart: A receiver beginning operation after being sent a restart command, generally used for testing rather than normal operation.
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SE868Kx-Ax Family Product User Guide Glossary and Acronyms 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.. See Restart. 1VV0301201 Page 74 of 76 2017-04-03...
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SE868Kx-Ax Family Product User Guide Document History 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 information Revised mechanical drawings Deleted reference to SMPS Added reference diagram Corrected pinout diagram: Pins RX1 and TX1 were swapped.
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