INSTALLATION AND OPERATION
USER MANUAL
WWW.UNICORECOMM.COM
UM620N
Automotive Grade Dual-frequency Multi-GNSS Positioning Module
Revision History
| Version | Revision History | Date |
| R1.0 | First release | Oct. 2022 |
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The information contained in this manual is provided “as is” and is believed to be true and correct at the time of its publication or revision. This manual does not represent, and in any case, shall not be construed as a commitments or warranty on the part of Unicore with respect to the fitness for a particular purpose/use, the accuracy, reliability
and correctness of the information contained herein.
Information, such as product specifications, descriptions, features and user guide in this manual, are subject to change by Unicore at any time without prior notice, which may
not be completely consistent with such information of the specific product you purchase.
Should you purchase our product and encounter any inconsistency, please contact us or our local authorized distributor for the most up-to-date version of this manual along
with any addenda or corrigenda.
Foreword
This document describes the information of the hardware, installation, specification and the use of Unicore UM620N modules.
Document Structure
- Product introduction
- Installation guide
- Technical specifications
- Package
- Clean
- Reflow soldering
Introduction
1.1 Overview
UM620N is a GNSS dual-frequency module designed for automotive navigation. It is based on the multi-system, dual-frequency and high-performance GNSS SoC –
UFirebird II (UC6580A), which is independently developed by Unicore Communications.
UM620N supports multi-system joint positioning and single system standalone positioning. It can output accurate positioning results even in complex scenarios.
The chip of UM620N conforms to the requirements of AEC-Q100, and the manufacturing process is in line with IATF 16949.
| Operating Temperature |
Grade | System | Interface | ||||||||||||||
| Model | |||||||||||||||||
| Ordering Code | o co+ ? 0 io .1- I |
o in c) r; 2 0 O 71- |
Professional | Automotive | 0 CL CD |
0 0 CO |
0 Cl) < Z o __I CD |
0 (1) E CD CD |
L) > < Z | CD CD NJ CI | U) < 02 U) |
H ea < D |
H CC < D |
0 `N_I_ | E. U) |
Data Update Rate |
|
| 1 | UM620N • |
• | • | • | • | • | • | • | • | • | • | • | • | 1 Hz/ 10 Hz* |
|||
| 10A2 | • | • | • | • | • | • | • | • | • | • | • | • | • | 1 Hz/ 10 Hz* |
|||
* The default data update rate is 1Hz, which can be configured to 10Hz (supported by specific firmware).
* NAVIC is supported by specific firmware.
1.2 Key Specifications
| Power | |
| Voltage | +2.7 V ~ 3.6 V DC |
| Power Consumption | 300 mW |
| RF Input | |
| Constellations | GPS/GLONASS/BDS/Galileo/QZSS/NAVIC (IRNSS) |
| Standing Wave Ratio | ≤ 2.5 |
| Input Impedance | 50 Ω |
| Antenna Gain | 15 dB ~ 30 dB |
| Physical Characteristics | |
| Dimensions | 16.0 mm * 12.2 mm * 2.4 mm |
| Input / Output Data Interface | |
| UART x 2 | LVTTL level Supported baud rate: 115200 ~ 460800 bps |
| 2 I C x 1 | Address: 7 bit Operating in slave mode Transfer rate: 400 Kbps |
| SPI x 1 | Alternate function of pin 18~21 Operating in slave mode Maximum transfer rate: 4 Mbps |
| GNSS Performance | |
| Frequencies (Configurable) |
GPS L1 C/A, L1C * , L5 GLONASS L1 BDS B1I, B1C * , B2a Galileo E1, E5a NAVIC * L5 QZSS L1, L5 SBAS |
| Time to First Fix (TTFF) |
Cold Start 30 s Hot Start 2 s Reacquisition 2 s |
UM620N User Manual
| Horizontal Positioning Accuracy | 1.5 m CEP (dual-frequency quad-constellation, open sky) |
| Velocity Accuracy (RMS) | 0.1 m/s |
| Sensitivity | GNSS |
| Tracking -165 dBm | |
| Acquisition -148 dBm | |
| Hot Start -158 dBm | |
| Reacquisition -160 dBm | |
| GNSS Data Update Rate | 1 Hz / 10 Hz* |
| 1 PPS Accuracy (RMS) | 20 ns |
| Data Format | NMEA 0183, Unicore Protocol |
* Items marked with an asterisk are supported by specific firmware.
UART
UM620N has two configurable UART ports. UART1 is the main serial port, which supports data transmission and firmware upgrade, and the signal input/output voltage level is LVTTL. The baud rate can be configured up to 460800 bps. Ensure that UART1 is connected to a PC or an external processor for firmware upgrade.
UART2 only supports data transmission and can’t be used for firmware upgrade.
1PPS
UM620N outputs 1PPS with adjustable pulse width and polarity.
1PPS is not for timing application.
nRESET
Active low, and the active time is required to last at least 10 ms.
Product Installation
2.1 Preparations
UM620N modules are Electrostatic Sensitive Devices (ESD) and must be installed with special precautions when handling. Please follow the instructions below before opening the anti-static plastic box.
- Follow the steps in section 2.2 in the correct order.
- Electrostatic discharge (ESD) may cause damage to the device. All operations mentioned in this chapter should be performed on an antistatic workbench, using an antistatic wristband and a conductive foam pad. If the antistatic workbench is not available, wear an antistatic wrist strap and connect the other end to a metal frame to play the anti-static role.
- Hold the edge of the module, and DO NOT touch any components of the module.
- Please check carefully whether the module is obviously loose or damaged. If there are any problems, please contact Unicore or the local dealer.
Figure 2-1 shows the typical installation of UM620N evaluation kit (EVK).
Please prepare the following items before installing UM620N.
- UM620N EVK (with AC Adapter)
- UM620N User Manual
- Unicore uSTAR software package
- Ancillary GNSS antenna
- USB cable and straight through serial cable
- PC or Laptop with serial ports (Windows 7 and above)
- Please keep the packing box and anti-static plastic box for storage and handling.
2.2 Hardware Installation
After the above preparations, please follow the steps below to install the module, which is only for satellite navigation test.
Step 1: Make sure to take full anti-static measures, such as wearing an anti-static wrist strap and grounding the workbench.
Step 2: Open the UM620N evaluation kit and take out the evaluation board.
Step 3: Use the GNSS antenna with appropriate gain and fix it in a non-blocking area;
use the appropriate cable to connect the antenna with UM620N evaluation board.
Step 4: Connect a PC to the EVK serial port through the USB cable or straight through serial cable.
Step 5: Open uSTAR software on the PC.
Step 6: Control the receiver through uSTAR to display constellations view, log messages, and receiver status, etc.
Technical Specifications
3.1 Electrical Specifications
Absolute Maximum Ratings
| Item | Min | Max | Unit | Description |
| Power Supply (VCC) | -0.5 | 3.6 | V | Main power supply |
| Backup Voltage (V_BCKP) | -0.5 | 3.6 | V | Backup power supply for RTC |
| Digital IO Voltage | -0.5 | 3.6 | V | Voltage of the digital signal pins |
| Antenna Input Power (RF_IN) | – | 3 | dBm | Maximum input power of antenna |
| Storage Temperature (TSTG) | -40 | 85 | ° C | Storage temperature for the module |
3.2 Operational Conditions
| Item | Symbol | Min | Typical | Max | Unit | Condition |
| Power Supply | VCC | 2.7 | 3.3 | 3.6 | V | |
| Ripple Voltage | V,,_,, | 50 | mV | |||
| Peak Current | I ccp | 134 | mA | VCC=3.0 V | ||
| Tracking Average Current | lAco | 90 | 100 | 116 | mA | VCC=3.0 V |
| Low Level Input Voltage | VI | 0 | 0.2*VCC | V | ||
| High Level Input Voltage | VIH | 0.7*VCC | VCC+0.2 | V | ||
| Low Level Output Voltage | VOL | 0 | 0.4 | V | lout=-2 mA | |
| High Level Output Voltage | VOR | VCC-0.4 | VCC | V | lout=2 mA | |
| Antenna Gain | GANT | 15 | 20 | 30 | dB |
3.3 Dimensions
| Symbol | Min (mm) | Typical (mm) | Max (mm) |
| A | 15.9 | 16 | 16.5 |
| B | 12.05 | 12.2 | 12.35 |
| C | 2.2 | 2.4 | 2.6 |
| D | 0.9 | 1 | 1.3 |
| E | 1 | 1.1 | 1.2 |
| F | 2.9 | 3 | 3.1 |
| G | 0.9 | 1 | 1.3 |
| H | 0.7 | 0.8 | 0.9 |
| K (Outer edge of the stamp hole) | 0.7 | 0.8 | 0.9 |
| N (Inner edge of the stamp hole) | 0.4 | 0.5 | 0.6 |
| M | 0.8 | 0.9 | 1 |
3.4 Pin Definition 
| Pin No. | Name | I/O | Electrical Level | Description |
| 1 | nRESET | I | LVTTL | Reset. Active low.Leave it floating if not in use. |
| 2 | DEL | I | — | Interface selection pin. If DEL is set low level, SPI is available. If DEL is set high or floating, UART and PC become available. |
| 3 | TIMEPULSE | 0 | LVTTL | Time pulse (1 PPS) |
| 4 | NC | — | — | Floating |
| 5 | RXD2 | I | LVTTL | UART 2 receiving data |
| 6 | TXD2 | 0 | LVTTL | UART 2 transmitting data |
| 7 | NC | — | — | Floating |
| 8 | nRESET | I | LVTTL | Reset. Low active. Leave it floating if not in use. |
| 9 | VCC_RF | 0 | Antenna feed output. It is recommended to use an external power supply rather than VCC_RF to feed the antenna. |
|
| 10 | GND | — | — | Ground |
| 11 | RF_IN | I | — | GNSS signal input |
| 12 | GND | — | — | Ground |
| 13 | GND | — | — | Ground |
| 14 | LNA_EN | O | — | Enable external LNA |
| 15 | NC | — | — | Floating |
| 16 | NC | — | — | Floating |
| 17 | NC | — | — | Floating |
| 18 | SDA / SPI CS_N |
— | — | I 2 C data (D_SEL=VCC or floating)/SPI chip select (D_SEL=GND) |
| 19 | SCL / SPICLK | – | — | I 2 C clock (D_SEL=VCC or floating)/SPI clock (D_SEL=GND) |
| 20 | TXD1/ SPI MISO |
O | LVTTL | SPI Master In Slave Out (D_SEL=GND)/ UART TXD signal (D_SEL=VCC or floating) |
| 21 | RXD1/ SPI MOSI |
I | LVTTL | SPI Master Out Slave In (D_SEL=GND)/ UART RXD signal (D_SEL=VCC or floating) |
| 22 | V_BCKP | I | 1.7V~3.6V | Backup voltage supply, applicable for hot start. If you do not use hot start, connect V_BCKP to VCC. Do NOT connect it to ground or leave it floating. |
| 23 | VCC | — | 2.7V~3.6V | Supply voltage |
| 24 | GND | — | — | Ground |
3.5 PCB Packaging 
When designing PCB solder mask, make sure that the area under UM620N is completely coated with solder mask.
Package
4.1 Label Description
4.2 Ordering Information
| Product Model | Ordering Code | Description |
| UM620N | 01 | Automotive grade dual-frequency navigation module, operating temperature: -40℃~+85℃, supporting firmware upgrade, 16.0 mm x 12.2 mm, 500 pieces/reel |
| 10A2 | Automotive grade dual-frequency navigation module, operating temperature: -40℃~+105℃, supporting firmware upgrade, 16.0 mm x 12.2 mm, 500 pieces/reel |
4.3 Package Description
The UM620N modules use carrier tape and reel (suitable for mainstream surface mount devices), packaged in vacuum-sealed aluminum foil antistatic bags, with a desiccant
inside to prevent moisture. When using reflow soldering process to solder the modules, please strictly comply with IPC standard to conduct temperature and humidity control. As packaging materials such as the carrier tape can only withstand the temperature of 55 degrees Celsius, modules shall be removed from the package during baking. 
| Item | Description |
| Number of Modules | 500 pcs/reel |
| Reel Size | Tray: 13″ External diameter: 330 mm Internal diameter: 100 mm Width: 24 mm Thickness: 2.0 mm |
| Carrier Tape | Space between (center-to-center distance): 20 mm |
UM620N modules are rated at MSL level 3. Please refer to the relevant IPC/JEDEC standards for baking requirements. Users may access to the website www.jedec.org to
get more information. The shelf life of UM620N modules packaged in a vacuum-sealed aluminum foil antistatic bags is one year.
Clean
DO NOT use alcohol or other organic solvents to clean the module, which may lead to soldering flux residues flooding into the shielding shell, causing mildew and other problems.
Reflow Soldering
In order to avoid the device falling off, the module should be placed on the top of the main board during soldering. Reflow soldering temperature curve is recommended
as shown in figure 6-1 below (M705-GRN360 is recommended for solder paste). Note: The module can only be soldered once.
Note: The apertures in the stencil need to meet the customer’s own design requirements and inspection specifications, and the thickness of the stencil should be above 0.15 mm. It is recommended to be 0.18 mm.
Copyright© 2009-2022, Unicore Communications, Inc.
Data subject to change without notice.
Unicore Communications, Inc.
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
Documents / Resources
 |
unicorecomm UM620N Automotive Grade Dual Frequency Multi GNSS Positioning Module [pdf] User Manual UM620N, Automotive Grade Dual Frequency Multi GNSS Positioning Module, UM620N Automotive Grade Dual Frequency Multi GNSS Positioning Module, Dual Frequency Multi GNSS Positioning Module, Multi GNSS Positioning Module, GNSS Positioning Module, Positioning Module, Module |
