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NEO-M8P
u-blox M8 High Precision GNSS Modules
Hardware Integration Manual
Abstract
This document provides design-in and feature information for the
high-accuracy NEO-M8P modules. Base and rover module variants
together provide a high precision cm-level RTK position solution.
Each module contains the u-blox M8 concurrent GNSS engine for
concurrent reception of GPS, GLONASS and BeiDou signals.
www.u-blox.com
UBX-15028081 - R03
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Table of Contents
Related Manuals for u-blox NEO-M8P
Summary of Contents for u-blox NEO-M8P
- Page 1 This document provides design-in and feature information for the high-accuracy NEO-M8P modules. Base and rover module variants together provide a high precision cm-level RTK position solution. Each module contains the u-blox M8 concurrent GNSS engine for concurrent reception of GPS, GLONASS and BeiDou signals. www.u-blox.com...
- Page 2 The information contained herein is provided “as is” and u-blox assumes no liability for the use of the information. No warranty, either express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the information.
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Page 3: Table Of Contents
NEO-M8P - Hardware Integration Manual Contents Contents ..........................3 Hardware description ....................5 Overview .............................. 5 Configuration ............................5 Connecting power ..........................5 1.3.1 VCC: Main supply voltage ......................5 1.3.2 V_BCKP: Backup supply voltage ....................5 1.3.3 VDD_USB: USB interface power supply ..................6 1.3.4... - Page 4 NEO-M8P - Hardware Integration Manual Appendix .......................... 23 Recommended parts ........................... 23 Design-in recommendations in combination with cellular operation ........... 24 Related documents......................25 Revision history ........................ 25 Contact ..........................26 Contents UBX-15028081 - R03 Advance Information Page 4 of 26...
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Page 5: Hardware Description
For the NEO-M8P module, the configuration can be saved permanently in SQI flash. 1.3 Connecting power The NEO-M8P high precision GNSS modules have up to three power supply pins: VCC, V_BCK and VDD_USB. 1.3.1 VCC: Main supply voltage The VCC pin provides the main supply voltage. During operation, the current drawn by the module can vary by some orders of magnitude. -
Page 6: Vdd_Usb: Usb Interface Power Supply
NEO-M8P - Hardware Integration Manual Figure 1: Backup battery and voltage (for exact pin orientation, see the NEO-M8P Data Sheet [1]) 1.3.3 VDD_USB: USB interface power supply VDD_USB supplies the USB interface. If the USB interface is not used, the VDD_USB pin must be connected to GND. -
Page 7: Display Data Channel (Ddc)
UART TXD (PIO 06). The TX Ready function is disabled by default. The TX Ready functionality can be enabled and configured by AT commands sent to the u-blox cellular module supporting the feature. For more information, see the GPS Implementation and Aiding Features in u-blox wireless modules [5]. -
Page 8: I/O Pins
1.5.4 D_SEL: input The D_SEL pin selects the available interfaces between SPI and UART/DDC operation. If open, the UART and DDC ports are active. If pulled low, the SPI interface is available. See the NEO-M8P Data Sheet [1]. 1.5.5 LNA_EN: Antenna ON (LNA enable), output In Power Save Mode, the system can turn on/off an optional external LNA using the LNA_EN signal in order to optimize power consumption. - Page 9 NEO-M8P - Hardware Integration Manual If, for example, a cellular signal radiates into an unshielded I/O line, it is possible to generate noise of the order of many volts which not only distort receiver operation but can also damage it permanently.
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Page 10: Design
Table 2: NEO-M8P Pinout 2.1.1 Pin name changes Selected pin names have been updated to agree with a common naming convention across u-blox modules. The pins have not changed their operation and are the same physical hardware but with updated names. The table below lists the pins that have changed name along with their old and new names. -
Page 11: Minimal Design
Figure 4: NEO-M8P passive antenna design 2.3 Layout: Footprint and paste mask Figure 5 describes the footprint and provides recommendations for the paste mask for NEO-M8P LCC modules. These are recommendations only and not specifications. Note that the copper and solder masks have the same size and position. -
Page 12: Antenna
50 . Figure 6 shows a minimal setup for a design with a good GNSS patch antenna. Figure 6: Module design with passive antenna (for exact pin orientation see the NEO-M8P Data Sheet [1]) Design UBX-15028081 - R03... -
Page 13: Active Antenna Design
Figure 7 shows a design using an external LNA to increase the sensitivity for best performance with passive antenna. Figure 7: Module design with passive antenna and an external LNA (for exact pin orientation see the NEO-M8P Data Sheet [1]) The LNA_EN pin (LNA enable) can be used to turn on and off an optional external LNA. - Page 14 NEO-M8P - Hardware Integration Manual Figure 8: Active antenna design, external supply from VCC_RF (for exact pin orientation see the NEO-M8P Data Sheet [1]) The L,C passive component values and recommended types are given in Appendix A.1. If the VCC_RF voltage does not match with the supply voltage of the active antenna, use a filtered external supply as shown in Figure 9.
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Page 15: Product Handling
3.1 Packaging, shipping, storage and moisture preconditioning For information pertaining to reels and tapes, Moisture Sensitivity levels (MSL), shipment and storage information, as well as drying for preconditioning see the NEO-M8P Data Sheet [1]. Population of Modules When populating the modules, make sure that the pick and place machine is aligned to the copper pins of the module and not on the module edge. - Page 16 Temperature fall rate: max 4 °C/s To avoid falling off, the NEO-M8P modules should be placed on the topside of the motherboard during soldering. The final soldering temperature chosen at the factory depends on additional external factors like choice of soldering paste, size, thickness and properties of the base board, etc.
- Page 17 Rework The NEO-M8P module can be unsoldered from the baseboard using a hot air gun. When using a hot air gun for unsoldering the module, a maximum of one reflow cycle is allowed. In general, we do not recommend using a hot air gun because this is an uncontrolled process and might damage the module.
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Page 18: Eos/Esd/Emi Precautions
EMI covers is done at the customer’s own risk. The numerous ground pins should be sufficient to provide optimum immunity to interferences and noise. u-blox makes no warranty for damages to the NEO-M8P module caused by soldering metal cables or any other forms of metal strips directly onto the EMI covers. - Page 19 NEO-M8P - Hardware Integration Manual When handling the RF pin, do not come into contact with any charged capacitors and be careful when contacting materials that can develop charges (e.g. patch antenna ~10 pF, coax cable ~50 – 80 pF/m, soldering iron, …) ...
- Page 20 NEO-M8P - Hardware Integration Manual EOS protection measures For designs with GNSS positioning modules and wireless transceivers (e.g. GSM/GPRS) in close proximity, ensure sufficient isolation between the wireless and GNSS antennas. If the wireless power output causes the specified maximum power input at the GNSS RF_IN to be exceeded, employ EOS protection measures to prevent overstress damage.
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Page 21: Applications With Cellular Modules
Related documents for the absolute maximum power input at the GNSS receiver. See the GPS Implementation and Aiding Features in u-blox wireless modules [5]. Isolation between GNSS and GSM antenna In a handheld design, an antenna isolation of approximately 20 dB can be reached with careful placement of the antennas. - Page 22 SAW or band pass ceramic filter (as recommend in section 3) into the antenna input line to the GNSS receiver (see Figure 16). Figure 16: Measures against out-band interference For design-in recommendations in combination to Cellular operation see Appendix See the GPS Implementation and Aiding Features in u-blox wireless modules [5] Product handling UBX-15028081 - R03 Advance Information...
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Page 23: Appendix
NEO-M8P - Hardware Integration Manual Appendix A.1 Recommended parts Recommended parts are selected on data sheet basis only. Other components may also be used. Part Manufacturer Part ID Remarks Parameters to consider Diode ESD9R3.3ST5G Standoff Voltage>3.3 V Low Capacitance < 0.5 pF Semiconductor ESD9L3.3ST5G... -
Page 24: Design-In Recommendations In Combination With Cellular Operation
• = integrated = optimal performance Table 6: Combinations of u-blox GNSS modules with different cellular technologies (2G/3G/4G). See the GPS Implementation and Aiding Features in u-blox wireless modules [5] Appendix UBX-15028081 - R03 Advance Information Page 24 of 26... -
Page 25: Related Documents
NEO-M8P - Hardware Integration Manual Related documents NEO-M8P Data Sheet, Doc. No. UBX-15016656 u-blox 8 / u-blox M8 Receiver Description including Protocol Specification (Public version), Doc. No. UBX-13003221, HPG 1.20 Protocol Specification Addendum, Doc. No. UBX-16004304 GPS Antenna Application Note, Doc. No. GPS-X-08014 C-bus specification, Version 2.1, Jan 2000,... -
Page 26: Contact
NEO-M8P - Hardware Integration Manual Contact For complete contact information, visit us at www.u-blox.com u-blox Offices North, Central and South Headquarters Asia, Australia, Pacific America Europe, Middle East, Africa u-blox Singapore Pte. Ltd. Phone: +65 6734 3811 u-blox America, Inc.