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EVK-M8BZOE User Guide

UBX-17053592 - R03

Early Production Information

Contents

Page 5 of 33

Power Mode Setup message UBX-CFG-PMS ....................................................................................... 16

Extended Power Management message UBX-CFG-PM2 ...................................................................... 16

Other useful messages ........................................................................................................................ 18

Measuring current consumption ............................................................................... 20

Basic measurements with the shunt resistors ...................................................................................... 20

ZOE-M8B VCC current ................................................................................................................ 21

ZOE-M8B V_BCKP current ........................................................................................................... 22

ZOE-M8B optional Flash and logic current ................................................................................... 22

Measurement with an external current measuring power supply ........................................................ 23

Board assembly .......................................................................................................... 24

Schematic .................................................................................................................... 27

Troubleshooting ......................................................................................................... 29

Common evaluation pitfalls ...................................................................................... 31

Related documents........................................................................................................... 32

Revision history ................................................................................................................ 32

Contact .............................................................................................................................. 33

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Summary of Contents for EVK-M8BZOE

Page 1: ...uide Abstract This document describes the structure and use of the EVK M8BZOE evaluation kit and provides information for evaluating and testing the u blox ZOE M8B ultra small super low power GNSS SiP...

Page 2: ...at www u blox com within Support Product Resources Conformity Declaration This document applies to the following products Product name Type number Hardware Version ROM FLASH version PCN reference EVK...

Page 3: ...SHORT CIRCUIT OF THE BATTERY WHEN TOUCHING IT WITH CONDUCTING PARTS IN THE UNLIKELY EVENT OF A FAILURE IN THE INTERNAL PROTECTION CIRCUITRY THERE IS A RISK OF AN EXPLOSION WHEN CHARGING FULLY OR PART...

Page 4: ...tions 8 2 1 Safety precautions 8 3 Getting Started 9 3 1 Software installation 9 3 2 Hardware installation 9 3 3 Interface default configuration 10 4 Device description 11 4 1 Power supply 11 4 1 1 5V...

Page 5: ...es 18 6 Measuring current consumption 20 6 1 Basic measurements with the shunt resistors 20 6 1 1 ZOE M8B VCC current 21 6 1 2 ZOE M8B V_BCKP current 22 6 1 3 ZOE M8B optional Flash and logic current...

Page 6: ...ntenna o 2 SMA connectors one for simulator use case one for external active antenna use case Populated optional flash o Configuration can be saved permanently o Logging can be done o AssistNow TM Off...

Page 7: ...8B Data Sheet 1 the ZOE M8B System Integration Manual 2 and the u blox 8 u blox M8 Receiver Description including Protocol Specification 3 1 4 u center GNSS evaluation software The installation softwa...

Page 8: ...icro USB connector or external powered via extra power supply pin 2 V5_IN and pin 18 GND on digital connector Normal Operating temperature 20 C to 70 C Table 2 EVK M8BZOE specification 2 1 Safety prec...

Page 9: ...Bridge of the EVK are available from Microsoft Windows Update service The Windows system driver search mechanism can download and install the USB drivers automatically from Microsoft Windows Update s...

Page 10: ...to pin 2 and GND to pin 18 4 Connect the active antenna to the Active Active antenna input or the simulator to the Passive input Simulator input 5 Start the u center GNSS Evaluation Software and selec...

Page 11: ...per capacitor is 1 F and provides backup power over a 100 shunt resistor to the ZOE M8B V_BCKP When this 1 F capacitor is fully charged to 3 3 V it can provide backup power for about 35 hours t C U I...

Page 12: ...serial data from EVK 5 GND 6 8 9 not connected Table 4 SUB D9 Connector pin description for EVK M8BZOE If the RS 232 interface is used the device must be powered either by USB cable or by the digital...

Page 13: ...Page 13 of 33 Figure 2 GNSS signal inputs Do not use both GNSS inputs at the same time Either use the passive simulator input or use the active antenna input Figure 3 EVK M8BZOE schematic of GNSS inpu...

Page 14: ...consider to use a DC block 4 3 1 Simulator input At Simulator input there is an external LNA U12 used in front of ZOE M8B to show optimal GNSS performance This allows verifying datasheet values of ZO...

Page 15: ...istNow TM Offline and AssistNow TM Autonomous data 4 6 RESET_N and SAFEBOOT_N RESET_N and SAFEBOOT_N are available on jumpers J5 and J10 as well as on digital connector J1 see section 4 4 for more inf...

Page 16: ...for Super E mode except where users have very specific power saving requirements When selecting a mode using CFG PMS always save the configuration by checking the save configuration box in u center ot...

Page 17: ...umption Additional power savings up to 15 20 can be achieved with the power save setting but at the expense of position accuracy Use first UBX CFG PMS to select the power mode followed by UBX CFG PM2...

Page 18: ...igure 6 The default constellations used by the receiver are GPS GLONASS and QZSS The constellations used can be selected with the UBX CFG GNSS message shown in Figure 7 Depending on region it may be b...

Page 19: ...Early Production Information Testing Super E mode Page 19 of 33 Figure 7 Constellations used can be selected with UBX CFG GNSS message For absolute lowest power applications current consumption can b...

Page 20: ...suring the ZOE M8B VCC current On the EVK M8BZOE there is a 1 8 V LDO supplying the ZOE M8B main supply VCC At the input of that LDO is a 1 current measurement shunt resistor placed in between J7 pin...

Page 21: ...o Average current consumption from power on to first fix will give you the Acquisition current consumption as mentioned in the ZOE M8B Data Sheet 1 o After the first fix the receiver continues to ope...

Page 22: ...shunt resistor in the V_BCKP supply 2 Disconnect the main supply 3 Read the voltage on the voltmeter and convert to current 1 mV equals 10 uA See Figure 10 for an example where 0 0016 V is measured b...

Page 23: ...ower supply and Gold Capacitor J6 and J7 removed The LDOs are supplied by separate external power supplies The jumpers for normal shunt resistor use have been disconnected and the power is supplied to...

Page 24: ...E User Guide UBX 17053592 R03 Early Production Information Board assembly Page 24 of 33 7 Board assembly Figure 12 shows the EVK M8BZOE assembly See Table 6 for the component list Figure 12 EVK M8BZOE...

Page 25: ...2 CON USB RECEPTACLE MICRO B TYPE SMD MOLEX 47346 0001 TID60001597 30V 1A J3 J11 CON SMA THT RIGHT ANGLE JACK J4 J6 J7 CON 2 ROWS THT 100MIL GRID 4PINS 0 64MM SQUARE 6 1MM HEIGHT J5 J10 J12 CON 1 ROW...

Page 26: ...5C U8 16MBIT SERIAL QUAD I O SPI FLASH MEMORY 1 65 3 6V 3 6V 40 85C U9 RS 232 TRANSCEIVER 1MBIT 3 5 5VOLT TRSF3223 VQFN20 5 5V 5 5V 40 85C U10 SINGLE CHIP USB TO UART BRIDGE 5V 0 1A 40 85C U12 LOW NOI...

Page 27: ...BZOE User Guide UBX 17053592 R03 Early Production Information Schematic Page 27 of 33 8 Schematic Figure 13 Schematic EVK M8BZOE Version C page 1 of 2 DNI TRUE in the schematic means Component not ins...

Page 28: ...EVK M8BZOE User Guide UBX 17053592 R03 Early Production Information Schematic Page 28 of 33 Figure 14 Schematic EVK M8BZOE Version C page 2 of 2 DNI TRUE in the schematic means Component not installed...

Page 29: ...serial port enumerator serenum sys resulting in erratic mouse cursor activity This typically happens if the GNSS receiver sends NMEA data at startup of PC Thus ensure the EVK is not connected to PC wh...

Page 30: ...mulator the user can change scenarios which enables jumping backwards in time This can have serious side effects on the performance of GNSS receivers The solution is to configure GPS week rollover to...

Page 31: ...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 signal splitter statistical tests...

Page 32: ...u No UBX 17013022 6 Information technology equipment Safety Standard IEC 60950 1 https webstore iec ch publication 4024 For regular updates to u blox documentation and to receive product change notifi...

Page 33: ...om Support support_ap u blox 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 ma...

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