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Summary of Contents for Ublox ZOE-M8B Series
- Page 1 ZOE-M8B Ultra-small, super low power u-blox M8 GNSS SiP module System Integration Manual Abstract This manual provides hardware and system design instructions for the u-blox ZOE-M8B GNSS SiP module. www.u-blox.com UBX-17045131 - R04...
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Page 2: Document Information
ZOE-M8B - System Integration Manual Document Information Title ZOE-M8B Subtitle Ultra-small, super low power u-blox M8 GNSS SiP module Document type System Integration Manual Document number UBX-17045131 Revision and date 13-Dec-2017 Document status Production Information Product status Corresponding content status In Development / Objective Specification Target values. - Page 3 ZOE-M8B - System Integration Manual Contents Document Information ..........................2 Contents ................................3 Hardware description ........................... 6 1.1 Overview ................................ 6 1.2 Low power operation ..........................6 1.2.1 Super-E mode overview ........................6 1.2.2 Super-E mode power consumption ....................7 Design-in ..............................
- Page 4 ZOE-M8B - System Integration Manual 2.14 EOS/ESD/EMI precautions ........................26 2.14.1 Electrostatic Discharge (ESD) ....................... 26 2.14.2 ESD protection measures ....................... 26 2.14.3 Electrical Overstress (EOS) ......................27 2.14.4 EOS protection measures ....................... 27 2.14.5 Electromagnetic interference (EMI) ..................... 27 2.14.6 Applications with cellular modules ....................
- Page 5 ZOE-M8B - System Integration Manual Related documents ........................... 41 Revision history ............................41 Contact ................................42 UBX-17045131 - R04 Page 5 of 42 Production Information...
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Page 6: Hardware Description
ZOE-M8B - System Integration Manual Hardware description 1.1 Overview The u-blox ZOE-M8B standard precision GNSS SiP module features the high performance u-blox M8 GNSS engine. The ultra-miniature form factor integrates a complete GNSS receiver solution including SAW filter, LNA and TCXO. The ZOE-M8B GNSS SiP is targeted for applications that require a small size without compromising the performance. - Page 7 ZOE-M8B - System Integration Manual On receiver startup, the Super-E mode uses the acquisition engine until sufficient number of satellites is acquired for reliable GNSS performance, and uses the tracking engine to track the satellites. By default, the acquisition engine is active at least for 5 minutes after the receiver startup to read the ephemeris of many satellites.
- Page 8 ZOE-M8B - System Integration Manual to receive data for current GNSS time and information of at least four satellites (red points in Figure 1). The receiver continues searching for more satellites in the acquisition state (yellow dots in Figure 1) until it has enough information for proper low-power operation. By default, this search lasts for five minutes after the receiver start-up, but can be adjusted if, for instance, AssistNow data is used.
- Page 9 ZOE-M8B - System Integration Manual new satellites. The use of assistance improves TTFF and reduces current consumption in all cases (as seen in Figure 4, Figure 6 and Figure 8). Figure 2: ZOE-M8B continuous mode current consumption in open environment. Figure 3: ZOE-M8B Super-E mode current consumption in open environment.
- Page 10 ZOE-M8B - System Integration Manual Figure 5: ZOE-M8B Super-E mode current consumption in obstructed environment (forest). Figure 6: ZOE-M8B Super-E mode current consumption in obstructed environment (forest) with AssistNow Offline. Figure 7: ZOE-M8B Super-E mode current consumption in urban environment. UBX-17045131 - R04 Contents Page 10 of 42...
- Page 11 ZOE-M8B - System Integration Manual Figure 8: ZOE-M8B Super-E mode current consumption in urban environment with AssistNow Offline. UBX-17045131 - R04 Contents Page 11 of 42 Production Information...
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Page 12: Power Management
ZOE-M8B - System Integration Manual Design-in In order to obtain good performance with the ZOE-M8B GNSS SiP, there are a number of issues requiring careful attention during the design-in. These include: • Power Supply: Good performance requires a clean and stable power supply. •... - Page 13 ZOE-M8B - System Integration Manual user-defined update periods from 1 s up to 10 s. The Continuous Mode has two predefined settings, full power and balanced. For specific power saving applications, the host system has an option to put the receiver into backup state.
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Page 14: Specification
ZOE-M8B - System Integration Manual 2.1.2.1 Super-E mode The available configuration options for Super-E mode are described in more detail in Figure 10. The relevant configuration messages and message fields with required values are also given. The power mode can be selected with the Power Mode Setup message UBX-CFG-PMS. Super-E mode offers the choice of 1 Hz (default), 2 Hz, or 4 Hz operation. -
Page 15: Continuous Mode
ZOE-M8B - System Integration Manual 2.1.2.2 Continuous Mode Continuous Mode provides the best performance in terms of tracking sensitivity and navigation performance by acquiring all satellites that are visible in the sky. Continuous mode uses the acquisition engine until all visible satellites are acquired, and uses the tracking engine to track the satellites. -
Page 16: Display Data Channel (Ddc) Interface
ZOE-M8B - System Integration Manual A signal change on the UART RXD pin can also be used to wake up the receiver in Power Save Mode u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification (see the [3]). ☞ Designs must allow access to the UART and the SAFEBOOT_N pin for future service, updates, and reconfiguration. - Page 17 ZOE-M8B - System Integration Manual ☞ For more information about supported SQI Flash devices see section A.3. 2.3 I/O Pins All I/O pins make use of internal pull-ups to VCC. Thus, there is no need to connect unused pins to VCC.
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Page 18: Rtc Using A Crystal
ZOE-M8B - System Integration Manual The time information can either be generated by connecting an external RTC crystal to the SiP, by connecting an external 32.768 kHz signal to the RTC input, or by time aiding of the GNSS receiver at every startup. -
Page 19: Passive Antenna
ZOE-M8B - System Integration Manual 2.5.1 Passive Antenna ZOE-M8B GNSS SiP is optimized to work with passive antennas. The internal SAW filter inside followed by an LNA is a good solution for most applications from jamming and performance point of view. - Page 20 ZOE-M8B - System Integration Manual Figure 15: Active antenna supply circuit 2.6 Safe Boot Mode (SAFEBOOT_N) If the SAFEBOOT_N pin is “low” at start up, the ZOE-M8B GNSS SiP starts in Safe Boot Mode and does not begin GNSS operation. In Safe Boot Mode the SiP runs from an internal LC oscillator and starts regardless of any configuration provided by the configuration pins.
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Page 21: Pin Description
ZOE-M8B - System Integration Manual 2.8 Pin description Pin # Name Description Remark Ground Ensure good GND connection SDA / SPI CS_N I/O Serial interface. See section 0 Ground Ensure good GND connection RF_IN GNSS signal input See section 2.5 Ground Ensure good GND connection Reserved... - Page 22 ZOE-M8B - System Integration Manual Pin # Name Description Remark Reserved Reserved Do not connect. Must be left open! The only exception is connection to pin H9 (V_BCKP). Pin G9 is internally connected to VCC, and can be used to supply V_BCKP if external supply is not used.
- Page 23 ZOE-M8B - System Integration Manual 2.9 Typical Schematic Figure 17: Typical schematic for ZOE-M8B 2.10 Migration from ZOE-M8G to ZOE-M8B The ZOE-M8B GNSS SiP is optimized for low power use – for example in portable and wrist worn applications – and features Super-E mode and data batching, which are not available in the ZOE-M8G. In addition, the ZOE-M8B supports all essential u-blox M8 features, including message integrity protection, anti-jamming and anti-spoofing, integrated odometer, geo-fencing, and optional data logging.
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Page 24: General Considerations
ZOE-M8B - System Integration Manual 2.11 Design-in checklist 2.11.1 General considerations Check power supply requirements and schematic: Is the power supply voltage within the specified range? See how to connect power in Section 2.1 and section 0. Compare the peak current consumption of ZOE-M8B GNSS SiP with the specification of your power supply. - Page 25 ZOE-M8B - System Integration Manual Add a ground plane underneath the GNSS SiP to reduce interference. This is especially important for the RF input line. For improved shielding, add as many vias as possible around the micro strip/coplanar waveguide, around the serial communication lines, underneath the GNSS SiP, etc.
- Page 26 ZOE-M8B - System Integration Manual 2.13.2 Paste mask The paste mask shall be same as the copper pads with a paste thickness of 80 µm. ☞ These are recommendations only and not specifications. The exact geometry, distances, stencil thicknesses and solder paste volumes must be adapted to the specific production processes (e.g. soldering etc.) of the customer.
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Page 27: Electrical Overstress (Eos)
ZOE-M8B - System Integration Manual Passive antennas Active Antennas LNA with appropriate ESD RF ESD protection diode rating Figure 19: ESD Precautions 2.14.3 Electrical Overstress (EOS) Electrical Overstress (EOS) usually describes situations when the maximum input power exceeds the maximum specified ratings. EOS failure can happen if RF emitters are close to a GNSS receiver or its antenna. -
Page 28: Applications With Cellular Modules
ZOE-M8B - System Integration Manual http://www.murata.com/products/emc/knowhow/pdf/4to5e.pdf Improved EMI protection can be achieved by inserting a resistor or better yet a ferrite bead or an inductor (see Table 14) into any unshielded PCB lines connected to the GNSS receiver. Place the resistor as close as possible to the GNSS receiver pin. - Page 29 ZOE-M8B - System Integration Manual Figure 22: In-band interference sources Measures against in-band interference include: • Maintaining a good grounding concept in the design • Shielding • Layout optimization • Filtering e.g. resistors and ferrite beads • Placement of the GNSS antenna •...
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Page 30: System Integration
ZOE-M8B - System Integration Manual System integration This section presents system integration methods for achieving low power and high performance. Many aspects affect the system performance and power consumption of the ZOE-M8B GNSS SiP: • The ZOE-M8B is intended to be run in Super-E mode and defaults to this mode on power up. The Super-E mode provides the best balance between low current consumption vs. -
Page 31: Assistnow™ Online
ZOE-M8B - System Integration Manual • Higher backup-state durations: the ephemerides and GNSS time information has expired. For this case AssistNow Offline data will still provide the benefits on acquisition sensitivity and TTFF If RTC is replaced by using time-assistance from the host, the benefits on TTFF are still applicable, but the benefits on acquisition sensitivity are reduced. - Page 32 ZOE-M8B - System Integration Manual u-blox only sends ephemeris data for those satellites currently visible to the mobile device requesting the data, thus minimizing the amount of data transferred. The AssistNow Online service provides data for GPS, GLONASS, BeiDou, Galileo and QZSS. 3.2.2 AssistNow™...
- Page 33 ZOE-M8B - System Integration Manual Data batching is disabled by default. To utilize this feature, the batching operation must be enabled and the buffer size must be set. It is also possible to set up a PIO as a flag to indicate when the buffer is close to filling up.
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Page 34: Product Handling & Soldering
ZOE-M8B - System Integration Manual Product handling & soldering 4.1 Packaging, shipping, storage and moisture preconditioning For information pertaining to reels and tapes, Moisture Sensitivity levels (MSD), shipment and ZOE-M8B Data Sheet storage information, as well as drying for preconditioning see the [1]. -
Page 35: Optical Inspection
ZOE-M8B - System Integration Manual 4.4 Soldering 4.4.1 Soldering paste Use of "No Clean" soldering paste is strongly recommended, as it does not require cleaning after the soldering process has taken place. The paste-mask geometry for applying soldering paste should meet the recommendations given in section 2.13.2. -
Page 36: Product Testing
ZOE-M8B - System Integration Manual Product testing 5.1 Test parameters for OEM manufacturer Because of the testing done by u-blox, it is obvious that an OEM manufacturer doesn’t need to repeat firmware tests or measurements of the GNSS parameters/characteristics (e.g. TTFF) in their production test. - Page 37 ZOE-M8B - System Integration Manual Appendix A Glossary Abbreviation Definition ANSI American National Standards Institute BeiDou Chinese satellite navigation system CDMA Code Division Multiple Access Electromagnetic interference Electrical Overstress Electrostatic Protective Area Electrostatic discharge Galileo European navigation system GLONASS Russian satellite system Ground GNSS Global Navigation Satellite System...
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Page 38: B Recommended Components
ZOE-M8B - System Integration Manual B Recommended components This section provides information about components that are critical for ZOE-M8B GNSS SiP performance. Recommended parts are selected on a data sheet basis only. Temperature range specifications need only be as wide as required by a particular application. For the purpose of this document, specifications are for an industrial temperature range (-40 C …... -
Page 39: Optional Sqi Flash (U3)
ZOE-M8B - System Integration Manual B.3 Optional SQI Flash (U3) Manufacturer Order No. Comments Macronix MX25R1635FxxxH1 1.8 V, 16 Mbit, several package/temperature options Macronix MX25R8035Fxxxx1 1.8 V, 8 Mbit, several package/temperature options Macronix MX25R8035Fxxxx3 1.8 V, 8 Mbit, several package/temperature options Winbond W25Q16FW 1.8 V, 16 Mbit, several package/temperature options... -
Page 40: Feed-Thru Capacitors
ZOE-M8B - System Integration Manual B.7 Feed-thru capacitors Manufacturer Order No. Comments MuRata NFL18SP157X1A3 For data signals, 34 pF load capacitance MuRata NFA18SL307V1A45 For data signals, 4 circuits in 1 package MuRata NFM18PC474R0J3 For power supply < 2 A, size 0603 MuRata NFM21PC474R1C3 For power supply <... -
Page 41: Related Documents
ZOE-M8B - System Integration Manual Related documents ZOE-M8B Data Sheet, Docu. No. UBX-17035164 GPS Implementation and Aiding Features in u-blox wireless modules, Docu. No. GSM.G1-CS- 09007 u-blox 8 / u-blox M8 Receiver Description Including Protocol Specification (Public version), Docu. No. UBX-13003221 GPS Antenna Application Note Docu. - Page 42 ZOE-M8B - System Integration Manual Contact For complete contact information, visit us at www.u-blox.com. u-blox Offices North, Central and South America Headquarters Asia, Australia, Pacific Europe, Middle East, Africa u-blox America, Inc. u-blox Singapore Pte. Ltd. u-blox AG Phone: +1 703 483 3180 Phone: +65 6734 3811 E-mail:...
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