Datasheet
Table Of Contents
- Document Information
- Contents
- 1 Functional description
- 1.1 Overview
- 1.2 Product features
- 1.3 Performance
- 1.4 Block diagram
- 1.5 Supported GNSS Constellations
- 1.6 Assisted GNSS (A-GNSS)
- 1.7 Augmentation Systems
- 1.8 Broadcast Navigation Data
- 1.9 Untethered Dead Reckoning (UDR)
- 1.10 Odometer
- 1.11 Data logging
- 1.12 Geofencing
- 1.13 Message Integrity Protection
- 1.14 Spoofing Detection
- 1.15 TIMEPULSE
- 1.16 Protocols and interfaces
- 1.17 Interfaces
- 1.18 Clock generation
- 1.19 Power management
- 1.20 Antenna
- 2 Pin Definition
- 3 Configuration management
- 4 Electrical specification
- 5 Mechanical specifications
- 6 Reliability tests and approvals
- 7 Product handling & soldering
- 8 Default messages
- 9 Labeling and ordering information
- Related documents
- Revision history
- Contact
NEO-M8U - Data Sheet
UBX-15015679 - R06 Functional description Page 5 of 27
Product Information
1 Functional description
☞ For more information about the functions, see the u-blox 8 / u-blox M8 Receiver Description
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1.1 Overview
The NEO-M8U module introduces u-blox’s Untethered Dead Reckoning (UDR) technology, which
provides continuous navigation without requiring speed information from the vehicle. This innovative
technology brings the benefits of dead reckoning to installations previously restricted to using GNSS
alone, and significantly reduces the cost of installation for after-market dead reckoning applications.
The strength of UDR is particularly apparent under poor signal conditions, where it brings continuous
positioning in urban environments, even to devices with antennas installed within the vehicle. Useful
positioning performance is also available during complete signal loss, for example in parking garages
and short tunnels. With UDR, positioning starts as soon as power is applied to the module, before the
first GNSS fix is available.
The NEO-M8U may be installed in any position within the vehicle without configuration. In addition to
its freedom from any electrical connection to the vehicle, the on-board accelerometer and gyroscope
sensors result in a fully self-contained solution, perfect for rapid product development with reliable
and consistent performance.
The intelligent combination of GNSS and sensor measurements enables accurate, real-time
positioning at rates up to 30 Hz, as is needed for smooth and responsive interactive applications.
Native high rate sensor data is made available to host applications such as driving behaviour analysis
or accident reconstruction.
The NEO-M8U includes u-blox’s latest generation GNSS receiver, which adds Galileo to the multi-
constellation reception that already includes GPS, GLONASS, BeiDou and QZSS. The module provides
high sensitivity and fast GNSS signal acquisition and tracking. UART, USB, DDC (I2C compliant) and
SPI interface options provide flexible connectivity and enable simple integration with most u-blox
cellular modules.
U-blox M8 modules use GNSS chips qualified according to AEC-Q100 and are manufactured in ISO/TS
16949 certified sites. Qualification tests are performed as stipulated in the ISO16750 standard:
“Road vehicles – Environmental conditions and testing for electrical and electronic equipment”.
1.2 Product features