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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

Summary of Contents for ZOE-M8B Series

Page 1: ...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 UB...

Page 2: ...ry compliance MAX 8 MAX M8 complies with all relevant requirements for RED 2014 53 EU The MAX 8 MAX M8 Declaration of Conformity DoC is available at www u blox com within Support Product resources Con...

Page 3: ...face 16 2 3 I O Pins 17 2 3 1 External interrupt 17 2 3 2 External LNA enable 17 2 3 3 Electromagnetic interference and I O lines 17 2 4 Real Time Clock RTC 17 2 4 1 RTC using a crystal 18 2 4 2 RTC u...

Page 4: ...ng 34 4 1 Packaging shipping storage and moisture preconditioning 34 4 2 ESD handling precautions 34 4 3 Safety precautions 34 4 4 Soldering 35 4 4 1 Soldering paste 35 4 4 2 Reflow soldering 35 4 4 3...

Page 5: ...ZOE M8B System Integration Manual UBX 17045131 R04 Page 5 of 42 Production Information Related documents 41 Revision history 41 Contact 42...

Page 6: ...red Land Grid Array packaging technology which enables easier and more reliable soldering processes compared to a normal LGA Land Grid Array package For product features see the ZOE M8B Data Sheet 1 T...

Page 7: ...ood tracking performance the signal strength of the strongest satellites should be at least 146 dBm to 144 dBm C N0 value of 28 dBHz to 30 dBHz Super E mode will still work if the signal level goes lo...

Page 8: ...y of the GNSS signal If the signal is attenuated blocked or reflected the power consumption acquisition speed and positioning accuracy suffer Application design including antenna performance also cont...

Page 9: ...proves 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 mod...

Page 10: ...uction Information 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...

Page 11: ...ZOE M8B System Integration Manual UBX 17045131 R04 Contents Page 11 of 42 Production Information Figure 8 ZOE M8B Super E mode current consumption in urban environment with AssistNow Offline...

Page 12: ...1 2 Backup power supply V_BCKP In the case of a power failure at main supply VCC the backup domain and optional RTC oscillator are supplied by V_BCKP Providing a V_BCKP supply maintains the time RTC...

Page 13: ...tion to put the receiver into backup state All essential data for quick re starting of navigation can be saved either on the receiver or on the host processor side Unlike some other u blox M8 receiver...

Page 14: ...BX CFG PMS UBX CFG PM2 as well as UBX CFG RATE messages For update rates from 1 Hz to 4 Hz it is recommended to use a uniform update rate for all Super E states For longer update periods up to 10 s it...

Page 15: ...DA SPI CS_N Table 2 Communication Interfaces overview It is not possible to use the SPI interface simultaneously with the DDC or UART interface For debugging purposes it is recommended to have a secon...

Page 16: ...ar module to confirm compatibility 2 2 3 SPI interface The SPI interface can be used to provide a serial communication with a host CPU If the SPI interface is used UART and DDC are deactivated because...

Page 17: ...g them as noise into the GNSS receiver This specifically applies to unshielded lines lines where the corresponding GND layer is remote or missing entirely and lines close to the edges of the printed c...

Page 18: ...mVpp can be achieved with a resistive voltage divider followed by a DC blocking capacitor in the range of 1 nF to 10 nF Also make sure the frequency versus temperature behavior of the external clock i...

Page 19: ...gainst RF power and ESD The external LNA U1 must be placed close to the passive antenna to get best performance If Power Save Mode is used and the minimum current consumption has to be achieved then t...

Page 20: ...u blox M8 Receiver Description Including Protocol Specification 3 Safe Boot Mode is used in production to program the SQI Flash It is recommended to have the possibility to pull the SAFEBOOT_N pin lo...

Page 21: ...QI_D0 I O Data line 0 to external SQI flash memory or reserved configuration pin Leave open if not used D3 SQI_CS_N I O Chip select for external SQI flash memory or configuration enable pin Leave open...

Page 22: ...V_BCKP I Backup supply J1 VCC I Supply voltage Clean and stable supply needed J2 VCC I Supply voltage Clean and stable supply needed J3 GND Ground Ensure good GND connection J4 RXD SPI MOSI I Serial i...

Page 23: ...ded the following differences are considered At start up the ZOE M8B defaults to Super E mode whereas ZOE M8G defaults to continuous mode Galileo operation is supported only in Continuous mode Galileo...

Page 24: ...th interference issues see the GPS Antenna Application Note 4 2 11 2 Schematic design in for ZOE M8B GNSS SiP For a minimal design with the ZOE M8B GNSS SiP the following functions and pins need to be...

Page 25: ...er for the micro strip coplanar waveguide calculation If the distance between the micro strip and the adjacent GND area on the same layer does not exceed 5 times the track width of the micro strip use...

Page 26: ...and voltage susceptibility issues Wireless systems include components which can produce Electrostatic Discharge ESD Electrical Overstress EOS and Electro Magnetic Interference EMI CMOS devices are mor...

Page 27: ...ntennas Active Antennas C D LNA with appropriate ESD rating and maximum input power Figure 20 EOS and ESD Precautions 2 14 5 Electromagnetic interference EMI Electromagnetic interference EMI is the ad...

Page 28: ...Make sure that absolute maximum input power level of the GNSS receiver is not exceeded See the GPS Implementation and Aiding Features in u blox wireless modules 4 2 14 6 1 Isolation between GNSS and G...

Page 29: ...ore handset antenna 2 14 6 4 Out band interference Out band interference is caused by signal frequencies that are different from the GNSS carrier see Figure 23 The main sources are wireless communicat...

Page 30: ...data when it starts up Receiving this information from the satellite broadcasts takes a long time and requires a high GNSS signal level Using a backup mode is a way to turn off the receiver while mai...

Page 31: ...r optimized period The A GNSS assistance data also improves tracking accuracy in Super E mode because the receiver can optimize the set of satellites used in power optimized tracking Performance of th...

Page 32: ...automatically generates accurate predictions of satellite orbital data AssistNow Autonomous data that is usable for future GNSS position fixes The concept capitalizes on the periodic nature of GNSS sa...

Page 33: ...buffer must be retrieved before making any adjustments to the buffering Retrieval of the buffered data may take longer that one navigation cycle E g retrieving a buffer of 300 position fixes over UART...

Page 34: ...tatic charges In addition to standard ESD safety practices the following measures should be taken into account whenever handling the receiver Unless there is a galvanic coupling between the local GND...

Page 35: ...ommended conditions for reflow process The peak temperature must not exceed 255 C The time above 245 C must not exceed 40 seconds The ZOE M8B GNSS SiP must not be soldered with a damp heat process 4 4...

Page 36: ...ications Positioning Technology www positioningtechnology co uk Figure 25 Multi GNSS generator 5 2 1 Guidelines for sensitivity tests 1 Connect a Multi GNSS generator to the OEM product 2 Choose the p...

Page 37: ...Protective Area ESD Electrostatic discharge Galileo European navigation system GLONASS Russian satellite system GND Ground GNSS Global Navigation Satellite System GPS Global Positioning System GSM Gl...

Page 38: ...turer data sheet for DC ESD and RF power ratings Manufacturer Order No System supported Comments TDK EPCOS B8401 B39162B8401P810 GPS GLONASS High attenuation TDK EPCOS B3913 B39162B3913U410 GPS GLONAS...

Page 39: ...mend parts list for optional SQI Flash B 4 External LNA U1 ID Parameter Value 1 Gain and Noise Figure 1 575 GHz 1 1 Gain 17 dB 1 2 Noise Figure 2 dB Table 11 External LNA specifications Manufacturer O...

Page 40: ...ignals 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 4 A size 0805...

Page 41: ...rd IEC 60950 1 https webstore iec ch publication 4024 For regular updates to u blox documentation and to receive product change notifications register on our homepage www u blox com Revision history R...

Page 42: ...lox com Regional Office China Beijing Phone 86 10 68 133 545 E mail info_cn u blox com Support support_cn u blox com Regional Office China Chongqing Phone 86 23 6815 1588 E mail info_cn u blox com Sup...

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