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EVK-M8U

Evaluation Kit

User Guide

Abstract

This document describes the structure and use of the EVK-M8U evaluation
kit and provides information for evaluating and testing u-blox M8
Untethered Dead Reckoning (UDR) positioning technology.

www.u-blox.com

UBX-15023994 - R01

Summary of Contents for EVK-M8U

Page 1: ...Abstract This document describes the structure and use of the EVK M8U evaluation kit and provides information for evaluating and testing u blox M8 Untethered Dead Reckoning UDR positioning technology...

Page 2: ...e following products Product name Type number Hardware Version ROM FLASH version PCN reference EVK M8U EVK M8U 0 00 D Flash FW 3 01 UDR 1 00 N A u blox reserves all rights to this document and the inf...

Page 3: ...ings and certifications CAUTION IN THE UNLIKELY EVENT OF A FAILURE IN THE INTERNAL PROTECTION CIRCUITRY THERE IS A RISK OF AN EXPLOSION WHEN CHARGING FULLY OR PARTIALLY DISCHARGED BATTERIES REPLACE TH...

Page 4: ...ation unit 8 3 3 1 Antenna connector 8 3 3 2 USB 9 3 3 3 UART 9 3 3 4 RST button 9 3 3 5 Safe boot button 9 3 3 6 Slide Switch 9 3 3 7 Front test Connector 10 3 3 8 LED 10 3 3 9 Backup Battery 10 3 3...

Page 5: ...R01 Advance Information Contents Page 5 of 26 7 Block diagram 17 8 Board layout 18 9 Schematic 20 10 Battery replacement 21 11 Troubleshooting 22 12 Common evaluation pitfalls 24 Related documents 25...

Page 6: ...List of products supported by EVK M8U evaluation kit 1 2 Kit includes Evaluation unit USB cable Active GPS GLONASS BeiDou antenna with 3 m cable Extra Battery RENATA CR2450 Quick Start card 1 3 Evalu...

Page 7: ...baud rate 921 6 kBd DB9 12 V level 14 pin 3 3 V logic 1 DDC I2C compatible max 400 kHz 1 SPI clock signal max 5 5 MHz SPI DATA max 1 Mbit s Dimensions 105 x 64 x 26 mm Power Supply 5V via USB or exter...

Page 8: ...tive antennas is 30 mA 3 3 Evaluation unit Figure 2 shows the front and the rear panel of the EVK M8U evaluation unit Front panel Rear panel Figure 2 EVK M8U evaluation unit front and rear panels 3 3...

Page 9: ...ton is recessed 3 3 5 Safe boot button This is used to set the unit in safe boot mode In this mode the receiver executes only the minimal functionality such as updating new firmware into the SQI flash...

Page 10: ...ESERVED0 Not connected 7 EXTIN0 I 3 3 V External interrupt input 6 RESERVED1 Not connected 5 SDA CS I O 3 3 V If slide switch on I2C then DDC interface selected Function data input output If slide swi...

Page 11: ...for best performance attach it on the roof as shown in Figure 33 Bring the antenna cable in through the window or door Be careful not to damage the antenna cable 4 1 2 Mounting the EVK M8U The EVK M8...

Page 12: ...navigation performance the recommended configuration is as follows Navigation Rate The default DR GNSS fused navigation solution update rate of 1 Hz is recommended You can set the navigation update r...

Page 13: ...ion mode and starts to compute combined GNSS Dead reckoning fixes and to calibrate the sensor required for computing the fused navigation solution The sensor calibration status outputs CALIBRATING see...

Page 14: ...ch as an empty open sky parking area provides good conditions The initialization and calibration drive should contain phases where the car is stopped during a few minutes with engine turned on phases...

Page 15: ...recommend recording and archiving the data of your test drives You can enable additional debug messages by clicking the Debug button and then clicking the Record button see Figure 7 When prompted to...

Page 16: ...d all the Aiding Data via the AssistNow Online service 3 Read the voltage and average if necessary on the voltmeter and convert to current 1 mV equals 1 mA 4 Perform the test with good signals and cle...

Page 17: ...EVK M8U User Guide UBX 15023994 R01 Advance Information Block diagram Page 17 of 26 7 Block diagram Figure 10 EVK M8U block diagram...

Page 18: ...Guide UBX 15023994 R01 Advance Information Board layout Page 18 of 26 8 Board layout Figure 11 shows the EVK M8U board layout PCB Version D See Table 6 for the component list of the EVB Figure 11 EVK...

Page 19: ...PITCH DISCONNECTABLE CRIMP CONNECTOR 40 85C L1 IND MURATA LQW15A 0402 8N7 3 0 54A 55 125C L2 IND MURATA LQW15A 0402 120N 5 0 64A 55 125C Q1 MBT3906DW1T1G DUAL GENERAL PURPOSE TRANSISTOR 0 2A 0 15W 40...

Page 20: ...UBX 15023994 R01 Advance Information 9 Schematic Figure 12 Schematic EVK M8U DNI TRUE in the schematic means Component not installed...

Page 21: ...UBX 15023994 R01 Advance Information 10 Battery replacement To replace the battery Number 5 in Figure 13 open the unit unscrew four screws on the front panel Figure 13 EVK M8U battery location...

Page 22: ...n is inaccurate by a few dozen meters u blox M8 GNSS technology starts up with the WGS84 standard GNSS datum If your application expects a different datum you ll most likely find the positions to be o...

Page 23: ...ing the main communication port The EVK M8U does not work properly when connected with a GNSS simulator When using an EVK together with a GNSS simulator pay attention to proper handling of the EVK A G...

Page 24: ...e an impact on signal travel time The position of the GNSS receiver is typically not the same between two tests Comparative tests should therefore be conducted in parallel by using one antenna and a s...

Page 25: ...ual Docu No UBX 15016700 3 u blox 8 M8 Receiver Description including Protocol Specification Docu No UBX 13003221 4 u center User Guide Docu No UBX 13005250 For regular updates to u blox documentation...

Page 26: ...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 Support su...

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