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NEO-M8L

u-blox M8 automotive dead reckoning modules
including 3D sensors

Hardware integration manual

Abstract

This document describes the features and specifications of NEO-M8L, a high-performance
automotive dead reckoning (ADR) module with 3D sensors. The module includes the u-blox M8
concurrent GNSS engine with reception of GPS, GLONASS, BeiDou, Galileo and QZSS signals.

www.u-blox.com

UBX-16010549 - R08

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Summary of Contents for M8 Series

Page 1: ...Abstract This document describes the features and specifications of NEO M8L a high performance automotive dead reckoning ADR module with 3D sensors The module includes the u blox M8 concurrent GNSS e...

Page 2: ...ument contains the final product specification This document applies to the following products Product name Type number ROM FLASH version PCN IN reference NEO M8L NEO M8L 0 12 Flash FW3 01 ADR 4 11 UB...

Page 3: ...1 RESET_N Reset input 8 1 5 2 WHEELTICK Wheel tick input 8 1 5 3 FWD Forward reverse input 8 1 5 4 D_SEL Interface select 9 1 5 5 LNA_EN LNA enable 9 1 5 6 TIMEPULSE 9 1 6 Electromagnetic interference...

Page 4: ...integration manual UBX 16010549 R08 Contents Page 4 of 28 C1 Public 4 5 Applications with cellular modules 22 Appendix 24 A Recommended parts 24 B Recommended antennas 25 Related documents 26 Revisio...

Page 5: ...ly is not interrupted For NEO M8L modules the configuration can be saved permanently in SQI flash 1 3 Connecting power The NEO M8L positioning modules have up to three power supply pins VCC V_BCKP and...

Page 6: ...e section 2 4 1 4 Interfaces For more information about the interfaces baud rates bandwidth speed and clock frequency and so on see the corresponding product data sheet 1 2 or 3 in the Related documen...

Page 7: ...GNSS receiver is operated as a USB self powered device C23 C24 Capacitors Required according to the specification of LDO U1 D2 Protection diodes Protect circuit from overvoltage ESD when connecting Us...

Page 8: ...modules By default the wheel tick count is based on the rising edge of the wheel tick pulse signal To improve performance with lower rate mechanically derived wheel tick signals the receiver may be co...

Page 9: ...output is configured using messages for TIMEPULSE2 The time pulse output must not be held LOW during start up 1 6 Electromagnetic interference on I O lines Any I O signal line with a length greater th...

Page 10: ...16 RESERVED Reserved 17 RESERVED Reserved 18 SDA SPI CS_N I O DDC data if D_SEL 1 or open SPI chip select if D_SEL 0 19 SCL SPI CLK I O DDC clock if D_SEL 1 or open SPI clock if D_SEL 0 20 TXD SPI MIS...

Page 11: ...solder masks have the same size and position To improve the wetting of the half vias reduce the amount of solder paste under the module and increase the volume outside of the module by defining the d...

Page 12: ...inimal setup for a design with a good GNSS patch antenna For exact pin orientation see the Appendix and the corresponding product Data sheet 1 2 or 3 in the Related documents section Figure 6 Module d...

Page 13: ...matches the supply voltage of the active antenna for example 3 0 V use the filtered supply voltage available at pin VCC_RF as shown in Figure 8 Active antenna design using VCC_RF pin to supply the ac...

Page 14: ...e More information about the ADR functionality can be found in the u blox 8 u blox M8 Receiver Description Including Protocol Specification 4 3 2 Sensor calibration The availability of Sensor Fusion M...

Page 15: ...ommendations The quality of the solder joints on the connectors half vias should meet the appropriate IPC specification Reflow soldering A convection type soldering oven is highly recommended over the...

Page 16: ...ducts Controlled cooling helps to achieve bright solder fillets with a good shape and low contact angle Temperature fall rate max 4 C s for the NEO M8L max 6 C s for the NEO M8L 01A To avoid falling o...

Page 17: ...dering processes are recommended for boards populated with NEO M8L modules To avoid upside down orientation during the second reflow cycle the NEO M8L module should not be submitted to two reflow cycl...

Page 18: ...dule from coating liquids with low viscosity therefore care is required in applying the coating Conformal coating of the module will void the warranty Casting If casting is required use viscose or ano...

Page 19: ...ent ESD handling precautions ESD prevention is based on establishing an Electrostatic Protective Area EPA The EPA can be a small working station or a large manufacturing area The main principle of an...

Page 20: ...mance sufficient Active antennas A RF_IN GNSS Receiver LNA B L RF_IN GNSS Receiver C D RF_IN GNSS Receiver LNA with appropriate ESD rating Figure 13 ESD precautions Protection measure A is preferred b...

Page 21: ...f a PCB Weak GND concept e g small and or long ground line connections EMI protection measures are recommended when RF emitting devices are near the GNSS receiver To minimize the effect of EMI a robus...

Page 22: ...of filters would be the SAW Filters from Epcos B9444 or B7839 or Murata Increasing interference immunity Interference signals come from in band and out band frequency sources In band interference With...

Page 23: ...MHz G S M 900 G S M 1800 G S M 1900 P ower dBm GPS input filter characteristics G P S 1575 0 110 G P S s ignals G S M 950 Figure 17 Out band interference signals Measures against out band interference...

Page 24: ...for mobile application Murata SAFEA1G58KB0F00 GPS GLONASS Low insertion loss only for mobile application Murata SAFEA1G58KA0F00 GPS GLONASS High attenuation only for mobile application Murata SAFFB1G...

Page 25: ...x 36 x 3 mm 1 8 to 5 5 V 10 mA at 3 V active INPAQ www inpaq com tw B3G02G S3 01 A 2 7 to 3 9 V 10 mA active Amotech www amotech co kr B35 3556920 2J2 35 x 35 x 3 mm GPS GLONASS passive Amotech www a...

Page 26: ...reference guide UBX 14001652 6 GPS Antenna Application Note GPS X 08014 7 NEO M8L NEO M8U Information Note UBX 20014805 8 GPS Compendium GPS X 02007 9 http www nxp com documents user_manual UM10204 pd...

Page 27: ...Data Sheet reference R04 28 Feb 2017 njaf Firmware update for NEO M8L 01A 10 automotive grade variant R05 09 Sep 2017 njaf Firmware version update for NEO M8L 0 12 new PCN added R06 12 Sep 2018 njaf...

Page 28: ...x 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 Suppo...

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