u-blox EVK-M8BZOE User Manual
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u-blox EVK-M8BZOE User Manual

u-blox EVK-M8BZOE User Manual

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EVK-M8BZOE

Evaluation Kit

User Guide
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.
www.u-blox.com
UBX-17053592 - R02

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Summary of Contents for u-blox EVK-M8BZOE

  • Page 1: Evaluation Kit

    EVK-M8BZOE Evaluation Kit User Guide 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. www.u-blox.com UBX-17053592 - R02...
  • 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.

  • Page 3: Preface

    An index finger points out key information pertaining to device operation and performance. Warnings and certifications EVK-M8BZOE is an Electrostatic Sensitive Device (ESD). CAUTION! RISK OF 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 PARTIALLY DISCHARGED BATTERIES.

  • Page 4: Table Of Contents

    EVK-M8BZOE User Guide Contents Preface ..........................3 Using this guide ............................... 3 Warnings and certifications ..........................3 Contents ..........................4 Product description ...................... 6 Overview .............................. 6 1.1.1 Evaluation kit versions ........................6 1.1.2 Features ............................6 Kit includes ............................6 Software and documentation .......................
  • Page 5 EVK-M8BZOE User Guide 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 6.1.1 ZOE-M8B VCC current ........................ 21 6.1.2...

  • Page 6: Product Description

    Active GNSS antenna with a 3 m cable • USB cable A plastic cap is attached on the top of the ZOE-M8B GNSS S-LGA SiP in EVK-M8BZOE. The purpose of the cap is to prevent air flow at ZOE-M8B. UBX-17053592 - R03...

  • Page 7: Software And Documentation

    Section 3.1 for details. For more ZOE-M8B related documentation, see the ZOE-M8B 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 software includes u-center, which is an interactive tool for configuration, testing, visualization and data analysis of GNSS receivers.

  • Page 8: Specifications

    Table 2: EVK-M8BZOE specification 2.1 Safety precautions EVK-M8BZOE must be supplied by an external limited power source in compliance with the clause 2.5 of the standard IEC 60950-1. This power source must be a Safety Extra-Low Voltage (SELV) circuit, and only SELV circuits are to be connected to the evaluation kit interfaces and antennas.

  • Page 9: Getting Started

    Once the zip file is downloaded, unzip it and double-click the extracted exe file. The u-center software will be installed on your system and placed under the “u-blox” folder in the “Start  Programs” menu. Windows drivers for the Silicon Labs CP210x USB to UART Bridge of the EVK are available from Microsoft Windows Update service.

  • Page 10: Interface Default Configuration

    EVK-M8BZOE User Guide 1. Make sure the “Interface Switch” is at RS-232 / USB side (and not SPI side). 2. Connect the jumpers J4, J7 and J6 as above (There is a white box drawn around the pins of these jumpers).

  • Page 11: Device Description

    4.1.1 5V main power supply The EVK-M8BZOE board must be supplied either by the micro USB connector or by an external 4.5 V – 5.5 V power supply connected to digital connector pin 2 and GND to pin 18, see Figure 1.

  • Page 12: Rs-232 Connector

    The digital connector J1 contains pins for evaluating DDC (I²C) bus communication. For such evaluation the interface switch must be in correct position: RS-232 / USB. Additional pull-ups on DDC lines to 1.8 V can be installed on the EVK-M8BZOE if needed, see R4 and R6 in Figure 4.3 GNSS signal inputs The EVK-M8BZOE has two RF inputs for GNSS signals.
  • Page 13 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 inputs The RF switch (U14) allows only one of the two GNSS signal inputs to reach the ZOE-M8B.

  • Page 14: Active Antenna Input

    Jumper J8 is not populated. 4.4 Digital Connector There is a 20-pin connector on EVK-M8BZOE. It provides several PIO’s, interfaces and supply options. All these pins are ESD protected.

  • Page 15: Flash

    4.4 for more information. 4.7 EXTINT On the EVK-M8BZOE the EXTINT signal of ZOE-M8B is available on digital connector J1 (see section 4.4), and on RS-232 connector (see section 4.2.3). If EXTINT0 on RS-232 is used, ensure the EXTINT signal available at digital connector J1 is connected to 1.8 V.

  • Page 16: Testing Super-E Mode

    Messages view of the u-center evaluation software. Refer to the ZOE-M8B Data Sheet [1], ZOE-M8B System Integration Manual [2] and u-blox 8 / u-blox M8 Receiver Description including Protocol Specification [3] for full descriptions of all available configuration options.
  • Page 17 EVK-M8BZOE User Guide Super-E mode has two settings for power optimization targets. The optimization target is set with optTarget field and is used with any update rate selected. The “performance” (default) provides an optimum compromise between position accuracy vs. power consumption. Additional power savings up to 15-20% can be achieved with the “power save”...

  • Page 18: Other Useful Messages

    EVK-M8BZOE User Guide 5.3 Other useful messages Super-E mode has three different states: acquisition, tracking, and power-optimized tracking. The power- optimized tracking state is the low-power state of the Super-E mode. Acquisition and tracking states are used during initial acquisition phase or in case fix is lost or satellite data for new satellites needs to be decoded. In most cases, after initial acquisition phase the receiver spends all or most of the time in power-optimized tracking state.
  • Page 19 EVK-M8BZOE User Guide Figure 7: Constellations used can be selected with UBX-CFG-GNSS message. For absolute lowest-power applications, current consumption can be further reduced by disabling GLONASS. UBX-17053592 - R03 Early Production Information Testing Super-E mode Page 19 of 33...

  • Page 20: Measuring Current Consumption

    Figure 8: EVK-M8BZOE board measuring 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 Ω current measurement shunt resistor placed in between J7 pin 1 and pin 2, see Figure 8.

  • Page 21: Zoe-M8B Vcc Current

    EVK-M8BZOE User Guide 6.1.1 ZOE-M8B VCC current To measure the acquisition and tracking power consumption with the EVK-M8BZOE, follow the below steps. A picture of the setup can be seen in Figure 9. 1. Connect a voltmeter to J7 pin 1 and pin 2 to see the voltage over the 1 Ω current measurement shunt resistor in the VCC supply.

  • Page 22: Zoe-M8B V_Bckp Current

    See Figure 10 for an example where 0.0016 V is measured by multimeter over 100 Ω V_BCKP shunt resistor. This corresponds (1 mV equals 10 uA) to 16 uA backup current. Figure 10: Setup to measure the V_BCKP current consumption of ZOE-M8B on EVK-M8BZOE 6.1.3 ZOE-M8B optional Flash and logic current If the optional Flash is used e.g.

  • Page 23: Measurement With An External Current Measuring Power Supply

    EVK-M8BZOE User Guide 6.2 Measurement with an external current measuring power supply If customers have their own current measurement setup, they can also measure the current consumption of VCC and V_BCKP of ZOE-M8B with an external current measuring power supply.

  • Page 24: Board Assembly

    EVK-M8BZOE User Guide 7 Board assembly Figure 12 shows the EVK-M8BZOE assembly. See Table 6 for the component list. Figure 12: EVK-M8BZOE Assembly UBX-17053592 - R03 Early Production Information Board assembly Page 24 of 33...
  • Page 25 EVK-M8BZOE User Guide PART DESCRIPTION C1 C3 C4 C6 C9 C18 C20 C21 C22 C23 C26 C27 C34 C35 C37 CAP CER X5R 0402 TY 1U0 10% 6.3V C2 C16 C31 C33 CAP CER X7R 0402 100N 10% 16V -55/+125C...
  • Page 26 U1 U7 LOW DROPOUT REGULATOR ON SEMI NCV8705 WDFN6 0.5A 1.8V -40/+125C PRECISION RAIL TO RAIL OP AMP LINEAR LT6000 DCB GNSS RECEIVER U-BLOX ZOE-M8B S-LGA51 U5 U11 U17 TINY LOGIC ULP-A 2-INPUT AND GATE 1.45X1.0 6-LEAD MICROPAK -40/+85C DUAL-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-...

  • Page 27: Schematic

    EVK-M8BZOE User Guide 8 Schematic Figure 13: Schematic EVK-M8BZOE Version C, page 1 of 2: DNI=TRUE in the schematic means: Component not installed UBX-17053592 - R03 Early Production Information Schematic Page 27 of 33...
  • Page 28 EVK-M8BZOE User Guide Figure 14: Schematic EVK-M8BZOE Version C, page 2 of 2: DNI=TRUE in the schematic means: Component not installed UBX-17053592 - R03 Early Production Information Schematic Page 28 of 33...

  • Page 29: Troubleshooting

    Only the COM ports that are available on your computer will show up in the COM port drop down list. If a COM Port is gray, another application running on this computer is using it. After installing USB driver for the first time by connecting EVK-M8BZOE to PC with USB cable, the cursor on PC starts to jump around the screen The syndrome is caused when the NMEA 0183 GNSS serial data is misinterpreted as a mouse data by the serial port enumerator (serenum.sys), resulting in erratic mouse cursor activity.
  • Page 30 The EVK-M8BZOE does not preserve the configuration when power is cut off u-blox M8 GNSS technology uses a slightly different concept than most other GNSS receivers do. Settings are initially stored to volatile memory. In order to save them permanently, sending a second command is required. This allows testing the new settings and reverting to the old settings by resetting the receiver if the new settings aren’t...

  • Page 31: Common Evaluation Pitfalls

    • When doing reacquisition tests, cover the antenna in order to block the sky view. Do not unplug the antenna, since the u-blox M8 positioning technology continuously performs a noise calibration on idle channels. UBX-17053592 - R03 Early Production Information...

  • Page 32: Related Documents

    User Guide, Docu. No. UBX-13005250 EVK-M8xZOE Quick Start Guide, Docu, No. UBX-17013022 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 notifications, register on our homepage. Revision history Revision...

  • Page 33: Contact

    EVK-M8BZOE - User Guide 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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