UNICORECOMM UM482 User Manual
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UNICORECOMM UM482 User Manual

Gps/bds/glonass/galileo all-constellation multi-frequency high precision rtk and heading module
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UM482
GPS/BDS/GLONASS/Galileo
All-constellation Multi-frequency
High Precision RTK and Heading
Module
I

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Summary of Contents for UNICORECOMM UM482

  • Page 1 UM482 GPS/BDS/GLONASS/Galileo All-constellation Multi-frequency High Precision RTK and Heading Module...
  • Page 2 Revision History Version Revision History Date Ver. 1.0 First release Aug. 2017 R3.1 Revise the description of RST_N 2019-08-26 configuration and the action execution time Add the related description to clarify the VCC restrictions R3.2 Chapter 2.1: delete the legacy 2019-10-14 parameter and add pin mechanical spec Chapter 2.2: add the working current...
  • Page 3 Foreword This <User Manual> offers you information in the features of the hardware, the installation, specification and use of Unicore UM482 product. For the generic version of this manual, please refer to different part of the manual according to your purchased product configuration, concerning CORS, RTK and Heading.

  • Page 4: Table Of Contents

    PECIFICATIONS ........................10 PERATION ONDITION ........................11 HYSICAL PECIFICATIONS 3 HARDWARE DESIGN ........11 ......................11 ESIGN IN ONSIDERATIONS UM482 R ......................12 EFERENCE ESIGN .............................. 13 PCB P ..........................15 ACKAGING ..........................15 ESET IGNAL 4 INSTALLATION AND CONFIGURATION ......16 ......................

  • Page 5: Overview

    By employing a single UC4C0(432 channel tracking) baseband chip and a single RF chip, using single-sided SMD packaging, UM482 can achieve very small size (30x40mm). It can simultaneously track GPS L1/L2 + BDS B1/B2 (B3)+ GLONASS L1/L2+Galileo E1/E5b+QZSS.

  • Page 6: Technical Specifications

    UM482 User Manual  20Hz data output rate  Adaptive recognition of RTCM input data format  On board MEMS integrated navigation  Support odometer input and external high-performance IMU interface* 1.2 Technical Specifications Table 1-1 Performance Specifications 432 channels, based on Time to First Fix ＜25s...

  • Page 7: Interfaces

    Table 1-2 Functional Ports 3x UART, 1xI2C, 1x SPI (LV-TTL) 1x1PPS（LV-TTL） 1x Event input Note: * represents optional configuration 1.3 Interfaces Nebulas-II UART RF In Filter ANT1_PWR Interface Event TCXO Chip QZSS SBAS RF In Filter MEMS Chip ANT2_PWR Figure 1-2 Block Diagram ...

  • Page 8: Hardware

    UM482 outputs 1 Pulse-per-second time strobe with corresponding time and positioning tag. The pulse width/polarity is configurable.  Event UM482 provides 1 Event Mark Input with adjustable pulse width and polarity.  Reset（RST_N）/Factory Default（FRESET_N） The reset signal RST_N is active low, no less than 20ms effective time.

  • Page 9: Pin Definition And Ins Coordinate System

    Figure 2-1 UM482 Mechanical Diagram 2.2 Pin Definition and INS Coordinate System (Top View） The UM482 has 2x30 pins depicted as below. The X, Y axis indicates the INS coordinate of the module.

  • Page 10: Pin Function

    UM482 User Manual Figure 2-2 UM482 Pin Diagram 2.3 Pin Function Table 2-2 Pin Descriptions Description Ground ANT1_IN GNSS antenna signal input (primary antenna)
  • Page 11 Description Ground Ground ANT1_IN GNSS antenna power supply (heading antenna) Ground ANT_NLOD Primary GNSS antenna open circuit indicator 1: normal 0: antenna is open circuit ANT_FFLG Primary GNSS antenna short circuit indicator 1: normal 0: antenna is short circuit Ground Ground SPEED odometer- pulse (reserved)
  • Page 12 UM482 User Manual Description longer than 5 seconds ERR_STAT Abnormal indicator, active-high. When the self-diagnosis of the module system fails, it outputs high level, alternatively outputs low level when the module completes the self- diagnosis. RTK_STAT RTK positioning indicator, active-high.

  • Page 13: Electrical Specifications

    Description Ground ANT2_FFLG Secondary GNSS antenna short circuit indicator 1: normal 0: antenna is short circuit ANT2_NLOD Secondary GNSS antenna open circuit indicator 1: normal 0: antenna is open circuit Ground ANT2_PWR Secondary GNSS antenna power supply Ground Ground ANT2_IN Secondary GNSS antenna signal (Heading antenna) Ground...

  • Page 14: Operation Condition

    UM482 User Manual Item Unit VCC Ripple (Rated Max.) Vrpp Voltage Input (pins other than -0.3 RXD1, RXD2, RXD3) Maximum ESD stress VESD(HBM) ±2000 2.5 Operation Condition Table 2-4 Operation Condition Item Min. Typical Max. Unit Condition Value Power Supply (VCC)

  • Page 15: Physical Specifications

    2.6 Physical Specifications Table 2-5 Physical Specifications Size 30×40×4 mm Temperature Working : -40℃～+85℃ Storage: -55℃～+95℃ Humidity 95% No condensation Vibration GJB150.16-2009，MIL-STD-810 Shock GJB150.18-2009，MIL-STD-810 3 Hardware Design 3.1 Design in Considerations  Supply reliable power to the VCC pin. Connect all the GND pins to ground ...

  • Page 16: Um482 Reference Design

     Antenna interface: Make sure the antenna impedance matching, and the circuit is short and smooth, try to avoid acute angle  Try to avoid circuits below UM482  This module is a temperature sensitive device, dramatic changes in temperature will result in reduced performance, keep it as far away from the high-power high-temperature air and heating devices as possible 3.2 UM482 Reference Design...

  • Page 17: Pins

    Figure 3-2 UM482 Reference Design 3.3 Pins Table 3-1 Pin Sequence Pin Name Description Integration Notes Stable, clear low ripple power supply, Voltage power 31，32 peak ripple power lower than 50mV Supply is preferred Power ANT1_PWR Antenna power 5, 46...
  • Page 18 UM482 User Manual Pin Name Description Integration Notes surface. 18， 25， 33， 34， 43， 47， 52， 55， 57， 58，60 ANT1_IN, Satellite Antenna 2, 59 50 Ω impedance matching ANT2_IN signal input COM1 COM1 output, leave unconnected if TXD1 Transmit Data...

  • Page 19: Pcb Packaging

    If the user reset the module via RST_N pin after power on, some configuration should be proceeded to make UM482 module work properly. The RST_N and power supply must meet the following timing sequence requirement. The RST_N should last more than 5ms to be effective.

  • Page 20: Installation And Configuration

    UM482 with Evaluation Kit (EVK). 4.2 Hardware Installation Figure 4-1 Typical Installation of UM482 Please inspect the shipping cartons for any signs of damage or mishandling before unpacking the UM482 package. Items as below are required to install the UM482 properly.
  • Page 21  PC or Laptop with serial ports (Windows XP/Win7 or later), with UPrecise installed Follow the steps below to install:  Step 1: Fix UM482 board on the EVK with the holes and pins accurately. Figure 4-2 Installation Instruction  Step 2: Choose the correct location for the antenna is critical for a high-quality installation.
  • Page 22 UM482 User Manual Figure 4-3 Connect the Antenna  Step 3: Connect the PC to the EVK serial port through serial cable;  Step 4: Connect a 12V adapter with the EVK power input, and switch on the EVK; Figure 4-4 Connect the Serial Port ...

  • Page 23: Power On

    4.3 Power On UM482 power supply is 3.3V DC，connect the corresponding serial ports and GNSS antenna before power up. After power-on, the receiver starts and can quickly establish communication. It also provides special testing tools for module testing. 4.4 Configuration and Output Unicore UPrecise software provides graphical interface to control and display the operation of the receiver.

  • Page 24: Operation Steps

    UM482 User Manual Figure 4-5 UPrecise Software 4.5 Operation Steps 1) Turn on the EVK. Click “file - > connect”. Set the baud rate: the default baud rate is 115200 bps Figure 4-6 Connect the Serial Port 2) Click the “receiver settings” button to configure the NMEA message output 3) Click “send”...

  • Page 25: Configuration Commands

    6) View and use various views of UPrecise and configure or input commands as required. 5 Configuration Commands UM482 supports abbreviated ASCII format. All commands are composed of a log heading and configuration parameters. Common instructions as shown in the following table:...
  • Page 26 UM482 User Manual Command Description Unmask (enable) the satellite systems for tracking. BDS, GPS, unmask BDS GLONASS can be enabled separately. By default, all satellite systems are enabled. Set the baud rate of com1 to 115200. Baud rates of com1、...

  • Page 27: Reference Station Configuration

    Command Description Output current heading information gphdt comx 1 Heading information includes: HDT、TRA 5.1 Reference Station Configuration The RTK base station is static with a fixed and known position. The common instructions for RTK base station configuration are: 1) If the precise coordination is known, the precise coordinate could be set as: Table 5-2 Base Station Mode Number Command Description...

  • Page 28: Moving Base Configurations

    5.3 RTK Rover Configuration RTK Rover station receives differential correction data sent from reference stations. UM482 can adaptively recognize RTCM data input interface and format. Common instructions for RTK Rover configurations are as follows: Table 5-4 Moving Base Station Mode...

  • Page 29: Heading Configuration

    Save configuration 5.4 Heading Configuration This command is used for dual-antenna receivers (UB482, UM482, UM442). The heading result is the angle from True North to the baseline of the ANT1 to ANT2 in a clockwise Figure 5- 1 Heading direction.

  • Page 30: Inertial Navigation

    GPHDT2 ONCHANGED SAVECONFIG 5.6 Inertial Navigation UB482, UM4B0, and UM482 have built-in inertial navigation devices. Please refer to the corresponding manual to set the installation angle. Refer to Figure 5- 2 Vehicle Coordinates (XYZ) for the boards’ inertial coordinate system, in which, the X, Y, Z axis are mutually perpendicular, and follow the right-hand rule.

  • Page 31: Antenna Detection

    Figure 5- 3 Module/Boards Inertial Coordinate System 6 Antenna Detection UM482 supports dual-antenna detection. The 2-bit detection signals are described as below: Table 6-1 2-bit Detection Signals ANT_NLOD ANT_FFLG Status Status Description Normal OPEN Antenna circuit is open SHORT Antenna circuit is short If the ANT_PWR is not powered properly or if the antenna is not fed by ANT_PWR, the detection results are invalid.
  • Page 32 UM482 User Manual Figure 7- 1 Update Interface In general, the upgrade time is within 5minutes. Note: Please use COM1 for firmware upgrade Figure 7- 2 Update Complete...

  • Page 33: Soldering Recommendation

    8 Soldering Recommendation Recommended welding thermal cycle curve is as follows: Figure 8- 1 Soldering Temperature  Temperature rising Stage Rising slope: Max. 3℃/s Rising temperature range：50℃-150℃  Preheating stage Preheating time: 60 – 120 s Preheating temperature range: 150 - 180℃ ...

  • Page 34: Packaging

    Because of the lead-free soldering temperatures are relatively low, if using this welding method, please give priority to other components on the Board. 9 Packaging There are 150pcs UM482 modules inside the package box. Table 9-1 Packaging Instructions Packaging Description...
  • Page 35 和芯星通科技（北京）有限公司 Unicore Communications, Inc. 北京市海淀区丰贤东路7号北斗星通大厦三层 F3, No.7, Fengxian East Road, Haidian, Beijing, P.R.China, 100094 www.unicorecomm.com Phone: 86-10-69939800 Fax: 86-10-69939888 info@unicorecomm.com www.unicorecomm.com...

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