MAX-8 / MAX-M8 - Uputronics
MAX-8 / MAX-M8u-blox 8 / M8 GNSS modulesHardware Integration ManualAbstractThis document describes the features and specifications of theu-blox MAX-8 / MAX-M8 module series.www.u-blox.comUBX-15030059 - R01
MAX-8 / MAX-M8 - Hardware Integration ManualDocument InformationTitleMAX-8 / MAX-M8Subtitleu-blox 8 / M8 GNSS modulesDocument typeHardware Integration ManualDocument numberUBX-15030059Revision and DateR01Document statusAdvance InformationMay-16-2016Document status explanationObjective SpecificationDocument contains target values. Revised and supplementary data will be published later.Advance InformationDocument contains data based on early testing. Revised and supplementary data will be published later.Early Production InformationDocument contains data from product verification. Revised and supplementary data may be published later.Production InformationDocument contains the final product specification.This document applies to the following products:Product nameType numberROM/FLASH versionPCN referenceMAX-M8CMAX-M8C-0-10ROM SPG 3.01N/AMAX-M8WMAX-M8W-0-10ROM SPG 3.01N/AMAX-M8QMAX-M8Q-0-10ROM SPG 3.01N/AMAX-8QMAX-8Q-0-10ROM SPG 3.01N/AMAX-8CMAX-8C-0-10ROM SPG 3.01N/Au-blox reserves all rights to this document and the information contained herein. Products, names, logos and designs described hereinmay in whole or in part be subject to intellectual property rights. Reproduction, use, modification or disclosure to third parties of thisdocument or any part thereof without the express permission of u-blox is strictly prohibited.The information contained herein is provided “as is” and u-blox assumes no liability for the use of the information. No warranty, eitherexpress or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particularpurpose of the information. This document may be revised by u-blox at any time. For most recent documents, visit www.u-blox.com.Copyright 2016, u-blox AG.u-blox is a registered trademark of u-blox Holding AG in the EU and other countries. ARM is the registered trademark of ARM Limited inthe EU and other countries.UBX-15030059 - R01Advance InformationPage 2 of 32
Prefaceu-blox Technical DocumentationAs part of our commitment to customer support, u-blox maintains an extensive volume of technicaldocumentation for our products. In addition to our product-specific technical data sheets, the following manualsare available to assist u-blox customers in product design and development. GPS Compendium: This document, also known as the GPS book, provides a wealth of informationregarding generic questions about GPS system functionalities and technology. Receiver Description including Protocol Specification: This document describes messages, configurationand functionalities of the MAX-8 / MAX-M8 software releases and receivers. Hardware Integration Manuals: These manuals provide hardware design instructions and information onhow to set up production and final product tests. Application Notes: These documents provide general design instructions and information that applies to allu-blox GNSS positioning modules.How to use this ManualThis manual has a modular structure. It is not necessary to read it from beginning to end.The following symbols highlight important information within the manual:An index finger points out key information pertaining to module integration and performance.A warning symbol indicates actions that could negatively influence or damage the module.QuestionsIf you have any questions about MAX-8 / MAX-M8 integration, please: Read this manual carefully. Contact our information service on the homepage http://www.u-blox.com. Read the questions and answers on our FAQ database on the homepage.Technical SupportWorldwide WebOur website (www.u-blox.com) is a rich pool of information. Product information, technical documents andhelpful FAQ can be accessed 24 h a day.By E-mailIf you have technical problems or cannot find the required information in the provided documents, contact theclosest Technical Support office. To ensure that we process your request as soon as possible, use our service poolemail addresses rather than personal staff email addresses. Contact details are at the end of the document.Helpful Information when Contacting Technical SupportWhen contacting Technical Support please have the following information ready: Receiver type (e.g. MAX-M8C-0-10), Datacode (e.g. 181000.0800) and firmware version (e.g. ROM SPG3.01) Receiver/module configuration Clear description of your question or the problem (may include a u-center logfile) A short description of the application Your complete contact detailsUBX-15030059Advance InformationPrefacePage 3 of 32
MAX-8 / MAX-M8 - Hardware Integration ManualContentsPreface . 3Contents. 41Hardware description . 61.11.2Overview . 6Configuration . 61.3Connecting power . 61.3.11.3.2VCC IO: IO Supply Voltage . 7V BCKP: Backup supply voltage . 7Single Crystal feature on MAX-8C / MAX-M8C . 71.3.31.3.41.4VCC RF: Output voltage RF . 8V ANT: Antenna supply (MAX-M8W) . 8Interfaces. 81.4.11.4.2UART. 8Display Data Channel (DDC) . 81.4.3TX READY. 81.5I/O pins . 91.5.1RESET N: Reset input . 91.5.2EXTINT: External interrupt . 91.5.31.5.4SAFEBOOT N . 9TIMEPULSE . 91.5.5LNA EN: LNA enable . 91.5.6ANT DET: Open Circuit Detection (MAX-M8) . 101.6Electromagnetic interference on I/O lines . 102Design . 112.1Pin description . 112.1.1Pin name changes . 1132.2Minimal design . 122.32.4Layout: Footprint and paste mask . 12Antenna and Antenna supervision . 132.4.1Antenna design with passive antenna . 132.4.22.4.3Antenna design with active antenna . 14Antenna design with active antenna using antenna supervisor (MAX-M8W) . 152.4.4Status reporting . 162.4.52.4.6Power and short detection antenna supervisor (MAX-M8W) . 16Power, short and open detection Antenna Supervisor (MAX-M8W). 18Migration to u-blox 8 / M8 modules . 193.13.2Migrating u-blox 7 designs to a u-blox 8 / M8 modules . 19Hardware migration from MAX-6 to MAX-8 / M8 . 19UBX-15030059 - R01Advance InformationContentsPage 4 of 32
MAX-8 / MAX-M8 - Hardware Integration Manual3.34Software migration . 20Product handling . 214.1Packaging, shipping, storage and moisture preconditioning . 214.24.3Soldering . 21EOS/ESD/EMI precautions . 244.4Applications with cellular modules . 27Appendix . 29A Glossary . 29Recommended parts . 30Related documents. 31Revision history . 31Contact . 32UBX-15030059 - R01Advance InformationContentsPage 5 of 32
MAX-8 / MAX-M8 - Hardware Integration Manual1 Hardware description1.1 Overviewu-blox MAX-8 / MAX-M8 modules are standard precision GNSS positioning modules featuring the highperformance u-blox 8 / M8 positioning engine. Available in the industry standard MAX form factor in a leadlesschip carrier (LCC) package, they are easy to integrate and combine exceptional positioning performance withhighly flexible power, design, and connectivity options. SMT pads allow fully automated assembly with standardpick & place and reflow-soldering equipment for cost-efficient, high-volume production enabling short time-tomarket.For product features see the MAX-8 Data Sheet [1] and MAX-M8 Data Sheet [2].To determine which u-blox product best meets your needs, see the product selector tables on the u-bloxwebsite www.u-blox.com.1.2 ConfigurationThe configuration settings can be modified using UBX protocol configuration messages; see the u-blox 8 / u-bloxM8 Receiver Description Including Protocol Specification [3]. The modified settings remain effective until powerdown or reset. If these settings have been stored in BBR (Battery Backed RAM), then the modified configurationwill be retained, as long as the backup battery supply (V BCKP) is not interrupted.eFuse is One-Time-Programmable; it cannot be changed if it has been programmed once.In order to save backup current, a u-blox MAX-8C / MAX-M8C module configured in “single crystal“ mode canhave the single-crystal feature turned off by means of a SW command. Hot start performance will be degraded(no time information at startup).Use the string in Table 1 to turn-off the single-crystal feature. This is recommended for low power applications,especially if time will be delivered by GSM or uC.eFuseStringturn-off single-crystal featureB5 62 06 41 09 00 01 01 92 81 E6 39 93 2B EE 30 31Table 1: String to turn off single-crystal feature1.3 Connecting poweru-blox MAX-8 / MAX-M8 positioning modules have up to three power supply pins: VCC, VCC IO, and V BCKP.VCC: Main supply voltageThe VCC pin provides the main supply voltage. During operation, the current drawn by the module can vary bysome orders of magnitude, especially if enabling low-power operation modes. For this reason, it is importantthat the supply circuitry be able to support the peak power for a short time (see the MAX-8 Data Sheet [1] andMAX-M8 Data Sheet [2] for specification).When switching from backup mode to normal operation or at start-up, u-blox MAX-8 / MAX-M8 modulesmust charge the internal capacitors in the core domain. In certain situations, this can result in a significantcurrent draw. For low-power applications using Power Save and backup modes, it is important that thepower supply or low ESR capacitors at the module input can deliver this current/charge.Use a proper GND concept. Do not use any resistors or coils in the power line.UBX-15030059 - R01Advance InformationHardware descriptionPage 6 of 32
MAX-8 / MAX-M8 - Hardware Integration Manual1.3.1 VCC IO: IO Supply VoltageVCC IO from the host system supplies the digital I/Os. The wide range of VCC IO allows seamless interfacing tostandard logic voltage levels independent of the VCC voltage level. In many applications, VCC IO is simplyconnected to the main supply voltage.Without a VCC IO supply, the system will remain in reset state.1.3.2 V BCKP: Backup supply voltageIf there is a power failure on the module supply (VCC IO), the real-time clock (RTC) and battery backed RAM(BBR) are supplied through the V BCKP pin. Thus orbit information and time can be mentained and will allow aHot or Warm start. If no backup battery is connected, the module performs a cold start at every power up if notaiding data are sent to the receiverAvoid high resistance on the V BCKP line: During the switch from main supply to backup supply, a shortcurrent adjustment peak can cause high voltage drop on the pin with possible malfunctions.If no backup supply voltage is available, connect the V BCKP pin to VCC IO.As long as power is supplied to the u-blox 8 / M8 modules through the VCC IO pin, the backup battery isdisconnected from the RTC and the BBR to avoid unnecessary battery drain (see Figure 1). In this case,VCC IO supplies power to the RTC and BBR.Figure 1: Backup battery and voltage (for exact pin orientation, see the MAX-8 Data Sheet [1] and MAX-M8 Data Sheet [2])Single Crystal feature on MAX-8C / MAX-M8COn MAX-8C / MAX-M8C, the reference frequency for the RTC clock will be internally derived from the mainclock frequency (26 MHz) when in Backup Mode (does not have an 32 kHz oscillator). This feature is called“single crystal” operation. In the event of a power failure, the backup battery at V BCKP will supply the 26 MHzcrystal oscillator, as needed to maintain the time. This makes MAX-8C / MAX-M8C a more cost efficient solutionat the expense of a higher backup current, as compared to other MAX-8 / MAX-M8 variants that use an ordinaryRTC crystal. Therefore, the capacity of the backup battery at V BCKP must be increased if Hardware BackupMode is needed (See the MAX-8 Data Sheet [1] and MAX-M8 Data Sheet [2] for specification).If the battery used cannot provide the increased current consumption for the needed time on MAX-8C / MAXM8C, the “single crystal” feature can be permanently disabled. Then the backup current will be same as onMAX-8 / MAX-M8 modules without “single crystal” feature. But the time information is not maitained duringoff time. So the customer either aides the time at every startup to the receiver or the Hot and Warmstartperformance will be degraded because of missing time information.Send this string to disable the “single crystal” feature: “B5 62 41 09 00 01 01 92 81 E6 39 93 2B EE 30 31”.This string has to be sent once in production and will permanenty turn off the single crystalfeature on MAX-8C / MAX-M8C. The Hot – and Warmstart performance will be degraded if timeinformation is not provided to the receiver at every startup.UBX-15030059 - R01Advance InformationHardware descriptionPage 7 of 32
MAX-8 / MAX-M8 - Hardware Integration Manual1.3.3 VCC RF: Output voltage RFThe VCC RF pin can be used to supply an active antenna or an external LNA. For more information, see section2.4.1.3.4 V ANT: Antenna supply (MAX-M8W)At V ANT pin an antenna supply voltage can be connected which will be provided at RF IN to supply an activeantenna. For more information see section 2.4.3.If not used, connect the V ANT pin to GND.1.4 Interfaces1.4.1 UARTu-blox MAX-8 / MAX-M8 positioning modules include a Universal Asynchronous Receiver Transmitter (UART)serial interface RXD/TXD that supports configurable baud rates. The UART output and input levels are 0 V toVCC IO. An interface based on RS232 standard levels ( /- 12 V) can be implemented using level shifters such asMaxim MAX3232. Hardware handshake signals and synchronous operation are not supported.1.4.2 Display Data Channel (DDC)2An I C compatible Display Data Channel (DDC) interface is available with u-blox MAX-8 / MAX-M8 modules forserial communication with an external host CPU. The interface only supports operation in slave mode (mastermode is not supported). The DDC protocol and electrical interface are fully compatible with the Fast-Mode of the2I C industry standard. DDC pins SDA and SCL have internal pull-up resistors to VCC IO.For more information about the DDC implementation, see the u-blox 8 / u-blox M8 Receiver DescriptionIncluding Protocol Specification [3]. For bandwidth information, see the MAX-8 Data Sheet [1] and MAX-M82Data Sheet [2]. For timing, parameters consult the I C-bus specification [6].The u-blox MAX-8 / MAX-M8 DDC interface supports serial communication with u-blox cellular modules.See the specification of the applicable cellular module to confirm compatibility.1.4.3 TX READYThe TX READY function is used to indicate when the receiver has data to transmit. A listener can wait on theTX READY signal instead of polling the DDC or SPI interfaces. The UBX-CFG-PRT message lets you configure thepolarity and the number of bytes in the buffer b
To determine which u-blox product best meets your needs, see the product selector tables on the u-blox website www.u-blox.com. 1.2 Configuration The configuration settings can be modified using UBX protocol configuration messages; see the u-blox 8 / u-blox M8 Receiver Description Includ
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Pulse width 0.(µs) 1 to 300.1 to 3000.1 to 30 Pulse Rate (KHz) 0 to 50 Duty cycle (%) 1 max. 12 max.1 max. 1 max. 1 max. 1 max. 1 max. RF rise and fall (ns) 30 max. Pulse off isolation (dB) 80 minimum Pulse input TTL Primary power voltage (Vac) Single phase 100-264 Single phase 100-264 Single phase 100-264 Single phase 100-264 Single phase
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