unicore UM620N Automotive Grade Dual frequency Multi GNSS Positioning Module User Manual

unicore UM620N Automotive Grade Dual frequency Multi GNSS Positioning

Module

UM620N User Manual

Product Introduction

The UM620N is an automotive-grade dual-frequency multi-GNSS positioning module manufactured by Unicore Communication, Inc. It is designed to provide accurate and reliable positioning information for various automotive applications.

Key Features

• Dual-frequency (L1/L5) GNSS positioning
• Supports GPS/QZSS, GLONASS, Galileo, and BeiDou navigation systems
• Automotive grade design with high-temperature resistance
• Compact size for easy integration into devices
• Low power consumption

Installation Guide

Preparations

Before installation, please ensure that:

• You have the necessary tools and components for installation
• The power supply is disconnected to prevent any electrical damage to the module or other components
• You have read and understood the installation instructions provided in this manual

Hardware Installation

1. Identify a suitable location for the module that has a clear view of the sky.
2. Connect the power supply and other required components to the module as per the provided circuit schematic.
3. Securely mount the module in the identified location using screws or other suitable fasteners.
4. Perform a functional test to ensure proper operation of the module.

Clean

It is recommended to keep the module clean to ensure proper functioning. Use a clean, dry cloth to wipe the module’s surface.
Avoid using any solvents or chemicals that may damage the module’s surface or components.

Reflow Soldering

The UM620N module is compatible with reflow soldering. Please refer to the product datasheet for detailed specifications on reflow soldering.

Revision History

Legal right notice
This manual provides information and details on the products of Unicore Communication, Inc. (“Unicore”) referred to herein.
All rights, title and interest to this document and the information such as data, designs, layouts contained in this manual are fully reserved, including but not limited to the copyrights, patents, trademarks and other proprietary rights as relevant governing laws may grant, and such rights may evolve and be approved, registered or granted from the whole information aforesaid or any part(s) of it or any combination of those parts.
Unicore holds the trademarks of “和芯星通”, “UNICORECOMM” and other trade name,
trademark, icon, logo, brand name and/or service mark of Unicore products or their product serial referred to in this manual (collectively “Unicore Trademarks”).

This manual or any part of it, shall not be deemed as, either expressly, implied, by estoppel or any other form, the granting or transferring of Unicore rights and/or interests (including but not limited to the aforementioned trademark rights), in whole or in part.

Disclaimer
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

1. Product introduction
2. Installation guide
3. Technical specifications
4. Package
5. Clean
6. Reflow soldering

Introduction

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.

The default data update rate is 1Hz, which can be configured to 10Hz (supported by specific firmware).
NAVIC is supported by specific firmware.

Key Specifications

Items marked with an asterisk are supported by specific firmware.

Interfaces

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

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.

1. Follow the steps in section 2.2 in the correct order.
2. 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.
3. Hold the edge of the module, and DO NOT touch any components of the module.
4. 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.

Hardware Installation
After the above preparations, please follow the steps below to install the module, which is only for satellite navigation test.

1. Make sure to take full anti-static measures, such as wearing an anti-static wrist strap and grounding the workbench.
2. Open the UM620N evaluation kit and take out the evaluation board.
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.
4. Connect a PC to the EVK serial port through the USB cable or straight through serial cable.
5. Open uSTAR software on the PC.
6. Control the receiver through uSTAR to display constellations view, log messages, and receiver status, etc.

Technical Specifications

Electrical Specifications

Absolute Maximum Ratings

Operational Conditions

Dimensions

Pin Definition

1

|

nRESET

|

I

| Reset. Active low.

LVTTL

 |  |  | Leave it floating if not in use.

Interface selection pin.

2

|

DEL

|

I

|

—

| If DEL is set low level, SPI is available.
 |  |  |  | If DEL is set high or floating, UART and
 |  |  |  | I2C become available.
3| TIMEPULSE| O| LVTTL| Time pulse (1PPS)
4| NC| —| —| Floating
5| RXD2| I| LVTTL| UART 2 receiving data
6| TXD2| O| LVTTL| UART 2 transmitting data
7| NC| —| —| Floating
 |  |  |  | Reset. Low active.
8| nRESET| I| LVTTL
 |  |  |  | Leave it floating if not in use.

Antenna feed output.

9| VCC_RF| O| 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|

—

|

—

| I2C data (D_SEL=VCC or floating)/SPI
CS_N| chip select (D_SEL=GND)
19             SCL / SPI          — CLK|

—

| I2C clock (D_SEL=VCC or floating)/SPI clock (D_SEL=GND)
 |  | SPI Master In Slave Out (D_SEL=GND)/
20             MISO               O| LVTTL| UART TXD signal (D_SEL=VCC or
 |  | floating)
 |  | SPI Master Out Slave In (D_SEL=GND)/
21             MOSI               I| LVTTL| UART RXD signal (D_SEL=VCC or
 |  | floating)
 |  | Backup voltage supply, applicable for
22| V_BCKP| I| 1.7V~3.6V           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

PCB Packaging

When designing PCB solder mask, make sure that the area under UM620N is completely coated with solder mask.

Package

Label Description

Ordering Information

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.

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.

Product 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.

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

www.unicorecomm.com

WWW.UNICORECOMM.COM

Copyright© 2009-2023, Unicore Communications, Inc.
Data subject to change without notice.

References

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