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Hardware integration manual Abstract This document describes the features and specifications of NEO-M8U, a high-performance untethered dead reckoning module with 3D sensors. The module includes the u-blox M8 concurrent GNSS engine with reception of GPS, GLONASS, BeiDou, Galileo and QZSS signals.
Document contains the final product specification. End of Life European Union regulatory compliance • NEO-M8U compiles with all relevant requirements for RED 2014/53/EU. The NEO-M8U Declaration of Conformity (DoC) is available at www.u-blox.com within Support > Product resources > Conformity Declaration.
The VCC pin provides the main supply voltage. During operation, the current drawn by the module can vary by some orders of magnitude. For this reason, it is important that the supply circuitry be able to support the peak power for a short time (see the NEO-M8U Data sheet [1] for specification). ☞...
If no backup supply voltage is available, connect the V_BCKP pin to VCC. ☞ As long as power is supplied to the NEO-M8U module through the VCC pin, the backup battery is disconnected from the RTC and the BBR to avoid unnecessary battery drain (see Figure 1). In this case, VCC supplies power to the RTC and BBR.
Table 1: Summary of USB external components 1.4.3 Display Data Channel (DDC) An I2C-compatible Display Data Channel (DDC) interface is available with a NEO-M8U module for serial communication with an external host CPU. The interface only supports operation in slave mode (master mode is not supported).
Driving RESET_N low activates a hardware reset of the system. Use this pin to reset the module only. Do not use RESET_N to turn the module on and off, since the reset state increases power consumption, or as a POR. With the NEO-M8U module the RESET_N pin is an input only. ☞...
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NEO-M8U - Hardware integration manual To avoid interference by improperly shielded lines, it is recommended to use resistors (for example, R>20 ), ferrite beads (for example, BLM15HD102SN1) or inductors (for example, LQG15HS47NJ02) on the I/O lines in series. Choose these components carefully because they also affect the signal rise times.
NEO-M8U - Hardware integration manual Design 2.1 Pin description Name Description SAFEBOOT_N SAFEBOOT_N, test-point for service use (Leave OPEN) D_SEL Interface select TIMEPULSE Time pulse (disabled by default). Do not pull low during reset. Note: configured using TIMEPULSE2 messages (see u-blox 8 / u-blox M8...
1.5.1. 2.3 Layout: Footprint and paste mask Figure 5 describes the footprint and provides recommendations for the paste mask for NEO-M8U modules. These are recommendations only and not specifications. Note that the copper and solder masks have the same size and position.
For more information see the appendix and the GPS Antenna Application Note [3]. Figure 7 shows a design using an external LNA and SAW to increase the sensitivity for best performance with passive antenna. For exact pin orientation, see the NEO-M8U Data sheet [1]. UBX-15016700 - R12...
GNSS system power consumption budget with additional 5 to 20 mA typically. If the supply voltage of the NEO-M8U module 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. For exact pin orientation, see the NEO-M8U Data Sheet [1].
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NEO-M8U - Hardware integration manual Active antenna design powered from an external supply Figure 9: Active antenna design, direct external supply ☞ The circuit shown in Figure 9 works with all u-blox M8 modules, including modules without VCC_RF output. UBX-15016700 - R12...
3.2 Installation To achieve good performance, the NEO-M8U hardware needs to be mounted in the vehicle in such a way that its alignment is stable to within 2°. It is important that the mounting design minimizes vibration and mechanical resonance.
Migration from NEO-M8L to NEO-M8U 4.1 Hardware migration NEO-M8L to NEO-M8U u-blox is committed to ensuring that NEO-M8U is backwards compatible to NEO-M8L. It is highly advisable that customers consider a design review with the u-blox support team to ensure the compatibility of key functionalities.
Product handling 5.1 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-M8U Data sheet [1]. Population of modules ☞...
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• Temperature fall rate: max 4 °C/s ☞ To avoid falling off, the NEO-M8U module 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, and so on.
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15), and then continue from left to right. Rework The NEO-M8U 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.
☞ u-blox makes no warranty for damages to the NEO-M8U module caused by soldering metal cables or any other forms of metal strips directly onto the EMI covers. Use of ultrasonic processes Some components on the u-blox M8 module are sensitive to ultrasonic waves.
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NEO-M8U - Hardware integration manual • Unless there is a galvanic coupling between the local GND (i.e. the work desk) and the PCB GND, the first point of contact when handling the PCB must always be between the local GND and PCB GND.
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NEO-M8U - Hardware integration manual 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. EOS causes damage to the chip structures. If the RF_IN is damaged by EOS, it is hard to determine whether the chip structures have been damaged by ESD or EOS.
NEO-M8U - Hardware integration manual 5.4 Applications with cellular modules GSM terminals transmit power levels up to 2 W (+33 dBm) peak, 3G and LTE up to 250 mW continuous. Consult the Data sheet for the absolute maximum power input at the GNSS receiver.
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NEO-M8U - Hardware integration manual Out-of-band interference Out-of-band interference is caused by signal frequencies that are different from the GNSS carrier (see Figure 16). The main sources are wireless communication systems such as GSM, CDMA, WCDMA, Wi-Fi, BT, and so on.
NEO-M8U - 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 ESD9R3.3ST5G Standoff voltage>3.3 V Low capacitance < 0.5 pF...
NEO-M8U - Hardware integration manual A.2 Recommended antennas Manufacturer Order no. Comments Hirschmann (www.hirschmann-car.com) GLONASS 9 M GPS+GLONASS active Taoglas (www.taoglas.com) AA.160.301111 36 x 36 x 4 mm, 3-5 V 30 mA active Taoglas (www.taoglas.com) AA.161.301111 36 x 36 x 3 mm, 1.8 to 5.5 V / 10 mA at 3 V active INPAQ (www.inpaq.com.tw)
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UDR 1.50 firmware and new type number added on page 2. 22-Mar-2021 njaf Product status updated to initial production for NEO-M8U-06B on page 2. Product status updated to mass production for NEO-M8U-06B and to end- 05-Sep-2022 njaf of-life for the others on page 2.
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NEO-M8U - Hardware 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...
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