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Summary of Contents for UNICORECOMM UM482
- Page 1 INSTALLATION AND OPERATION USER MANUAL WWW.UNICORECOMM.COM UM482 GPS/BDS/GLONASS/Galileo All-constellation Multi-frequency High Precision Positioning and Heading Module Copyright© 2009-2021, Unicore Communications, Inc. Data subject to change without notice.
- Page 2 Revision History Version Revision History Date Ver. 1.0 First release Aug. 2017 R3.1 Revise the description of RST_N configuration and the 2019-08-26 action execution time Add the related description to clarify the VCC restrictions R3.2 Chapter 2.1: delete the legacy parameter and add pin 2019-10-14 mechanical spec Chapter 2.2: add the working current info of No.17 pin...
- Page 3 Foreword This <User Manual> offers you information on the features of the hardware, the installation, specifications and use of the UNICORECOMM UM482 product. For the generic version of this manual, please refer to the appropriate part of this manual depending on your purchased product configuration - concerning CORS, RTK and Heading.
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Page 4: Table Of Contents
LECTRICAL PECIFICATIONS ......................8 PERATIONAL ONDITIONS ....................... 9 HYSICAL PECIFICATIONS 3 HARDWARE DESIGN ........9 ......................9 ESIGN IN ONSIDERATIONS UM482 R ......................10 EFERENCE ESIGN ............................11 PCB P ........................13 ACKAGING ..........................13 ESET IGNAL ....................14 XTERNAL... -
Page 5: Overview
By employing a single UC4C0 (432 channel tracking) baseband chip with internal RF front-end in a single-sided SMD package, UM482 can achieve very small size (30x40 mm). It can simultaneously track GPS L1/L2 + BDS B1I/B2I + GLONASS L1/L2+Galileo E1/E5b+L1/L2 QZSS. -
Page 6: Technical Specifications
UM482 User Manual May also support odometer input and external high-performance IMU interface* 1.2 Technical Specifications Table 1-1 Performance Specifications 432 channels, based on ＜25s Channels Cold Start NebulasII SoC chip GPS L1/L2 BDS B1I/B2I RTK Initialization ＜5s (typical) -
Page 7: Interfaces
The pulse width/polarity is configurable. Event UM482 provides a 1 Event Mark Input with adjustable pulse width and polarity. Reset (RST_N)/Factory Default (FRESET_N) The reset signal RST_N should be set active low for no less than 20ms effective time. -
Page 8: Hardware
FRESET_N pin to low for more than 5s to ensure a successful reset. 2 Hardware 2.1 Dimensions Table 2-1 Dimensions Symbol Value (mm) Tolerance (mm) 40.00 -0.2 +0.5 30.00 ±0.2 4.00 ±0.2 1.58 ±0.1 1.27 ±0.1 ±0.1 0.91 ±0.1 1.35 ±0.1 0.66 Figure 2-1 UM482 Mechanical Diagram... -
Page 9: Pin Definition (Top View)
2.2 Pin Definition (Top View) The UM482 has 2x30 pins, shown below. 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) Ground... - Page 10 UM482 User Manual Description Ground GNSS antenna power supply (for separate heading ANT1_PWR antennae) Ground Primary GNSS antenna open circuit indicator ANT_NLOD 1: normal 0: antenna is open circuit Primary GNSS antenna short circuit indicator ANT_FFLG 1: normal 0: antenna is short circuit...
- Page 11 Description SPI_MISO SPI data master input slave output SPI_MOSI SPI data master output slave input SPI_CLK SPI clock SPI_SS0 SPI chip select 0 SPI_SS1 SPI chip select 1 3.3V_VCC Power Power Supply (+3.3V) 3.3V_VCC Power Power Supply (+3.3V) Ground Ground TXD1 COM 1 transmit RXD1...
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Page 12: Electrical Specifications
UM482 User Manual 2.4 Electrical Specifications Table 2-3 Absolute Maximum Ratings Item Unit Power Supply (VCC) -0.3 Voltage Input -0.3 VCC+0.2 Primary GNSS Antenna Power ANT1_PWR -0.3 Supply Primary GNSS Antenna Signal Input ANT1_IN -0.3 ANT1_PWR Secondary GNSS Antenna Power ANT2_PWR -0.3... -
Page 13: Physical Specifications
Item Typical Unit Condition Power Supply Operating Temperature Topr °C Power Consumption NOTE: Since the product contains capacitors at the input, inrush current will occur during power-on. Evaluate in the actual environment in order to check the effect of the supply voltage drop due to the inrush current. -
Page 14: Um482 Reference Design
Antenna interface: Make sure the antenna impedance matches, and the cable is short without any kinks, try to avoid all acute angles Try to avoid designing in any circuits underneath UM482 This module is a temperature sensitive device, so dramatic changes in temperature will result in reduced performance. -
Page 15: Pins
Figure 3-2 UM482 Reference Design 3.3 Pins Table 3-1 Pin Sequence Pin Name Description Integration Notes Stable, clean, low ripple power Voltage power 31, 32 supply - peak ripple power lower Supply than 50mV is preferred Antenna ANT1_PWR power 5, 46... - Page 16 UM482 User Manual Pin Name Description Integration Notes ANT1_IN, Satellite Antenna 2, 59 50 Ω impedance matching ANT2_IN signal input COM1 COM1 output, leave TXD1 Transmit unconnected if not used Data COM1 COM1 input, leave unconnected RXD1 Receive Data if not used...
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Page 17: Pcb Packaging
If the user resets the module via RST_N pin after power on, some configuration setting should proceeded in order for the UM482 module to perform correctly. The RST_N and power supply must meet the following timing sequence requirement. The RST_N reset signal should last more than 5ms to be effective. -
Page 18: External Antenna Feed Design
UM482 User Manual 3.6 External Antenna Feed Design UM482 feeds the antenna signals to the required circuits internally, but in order to effectively prevent damage from lightning and surges, circuit protection should be installed externally to protect the module. High voltage and high-power protection chips should be used to feed the antenna from the outside of the module. -
Page 19: Installation And Configuration
4 Installation and Configuration 4.1 ESD Handling Precautions UM482 Module is an ESD sensitive device and special precautions when handling are required. Electrostatic discharge may cause damages to the device. All operations mentioned in this chapter should be carried out on an antistatic workbench, wearing an antistatic wrist strap and a using a conductive foam pad ... - Page 20 PC or laptop with serial ports (Windows 7 or above), with UPrecise installed Follow the steps below to install: Step 1: Fix UM482 board on the EVK with the holes and pins aligned accurately. Figure 4-2 Installation Instruction ...
- Page 21 Figure 4-3 Connect the Antenna Step 3: Connect the PC to the EVK serial port through the serial cable; Step 4: Connect a 12V adapter to the EVK power input, and switch on the EVK; Figure 4-4 Connect the Serial Port ...
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Page 22: Power On
UM482 User Manual 4.3 Power On The 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. -
Page 23: Operation Steps
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 24: Configuration Commands
UM482 User Manual 5 Configuration Commands UM482 supports abbreviated ASCII format. All commands are composed of a log heading and configuration parameters. Common instructions are shown in the following table: Table 5-1 Common Instructions Command Description Reset to factory settings. -
Page 25: Reference Station Configuration
Command Description rtcm1033 comx Set COMX, ICOMX, NCOMX to send differential message under base station mode. COMX could be either com1, com2, or com3. rtcm1006 comx rtcm1074 comx 1 rtcm1124 comx 1 rtcm1084 comx 1 rtcm1094 comx 1 NMEA0183 Output Message Output GGA in 1Hz. -
Page 26: Rover Station Configuration
UM482 can adaptively recognize RTCM data input interface and format. Frequently used instructions for the moving base station are as follows:... -
Page 27: 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 direction. The heading function is enabled by default settings. See Figure 5- 1 Heading Schematic for the schematic. -
Page 28: Heading2 Configuration
5.5 Heading2 Configuration The heading2 result is the angle from True North to the baseline of the base to rover in a clockwise direction. Dual-antenna heading receiver (UB482, UM482, UM442) supports heading2. The heading2 for the dual-antenna receiver is the angle from True North to the baseline of the Base to ANT1 in a clockwise direction. -
Page 29: Firmware Upgrade
If the ANT_PWR is not powered correctly or if the antenna is not fed by ANT_PWR, the detection results are invalid. 7 Firmware Upgrade Upgrading UM482 may be done using UPrecise software: Click “…” to browse the firmware update package, and click “Start” button to start the firmware upgrading process (don’t select “Reset” checkbox): Figure 7- 1 Update Interface In general, the upgrade time is within 5minutes. -
Page 30: Soldering Recommendation
UM482 User Manual Figure 7- 2 Update Complete 8 Soldering Recommendation Recommended thermal cycle curve is as follows: Figure 8- 1 Soldering Temperature... -
Page 31: Packaging
Since the lead soldering temperatures are relatively low, if using this soldering method, please give priority to other components on the Board. 9 Packaging There are 150 pcs UM482 modules inside the package box. Table 9-1 Packaging Instructions Packaging... - Page 32 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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