Unicore UM220-IV NL GNSS Receiver Modules Board System User Manual

Unicore UM220-IV NL GNSS Receiver Modules Board System

Specifications:

UM220-IV NL Industry Grade Multi-GNSS Positioning Module

• Electrical Specifications: Updated size parameters
• Operation Condition: Update product label instruction, delete GLONASS frequency, add shelf life, revise MSL instructions, elaborate CEP description, update power supply VCC and V_BCKP, add note regarding hot start connection, and revise VSWR

Product Usage Instructions

1. Introduction

1.1 Overview: The UM220-IV NL is an industry-grade Multi-GNSS Positioning Module by Unicore Communication, Inc. designed for precise positioning applications.

1.2 Key Features: The module offers advanced features such as multi-GNSS support, high accuracy, and reliable performance.

1.3 Interface: Familiarize yourself with the module’s interface connections and pin definitions before installation.

2. Product Installation

2.1 Installation Preparation:

Prior to installation, ensure that you have reviewed the hardware requirements and have necessary tools ready.

2.2 Hardware Installation:

Follow the provided hardware installation guide to securely integrate the UM220-IV NL module into your system.

3. Technical Specifications

3.1 Electrical Specifications:

Refer to the updated size parameters for accurate electrical specifications of the module.

3.2 Operation Condition:

Follow the updated product label instructions, including connecting V_BCKP to VCC if hot start is not used, and adhere to the revised MSL instructions for optimal operation conditions.

Frequently Asked Questions

• Q: How do I update the firmware of the UM220-IV NL module?
  • A: To update the firmware, download the latest firmware version from the Unicore Communication website and follow the provided instructions for flashing the firmware onto the module.
• Q: What is the shelf life of the UM220-IV NL module?
  • A: The shelf life of the module is indicated in the updated product label instructions. It is recommended to adhere to this shelf life for optimal performance.

Revision History

Ver. 1.0.1 Alpha

release

| The Pin definition and performance parameters have

been updated.

| Jun.2018
Ver. 1.0.2 Beta

release

| Updated size parameters| Aug.2018
Ver. 1.0.3 Product

release

| Update product label instruction| May.2019
R1.1| 1.2: Delete the GLONASS frequency

6.2: Add shelf life

| Sep. 2019
R1.2| Chapter 6.2: revise the MSL instructions| Jan. 2020
R1.3| Add the footnote to elaborate CEP| Oct. 2020
R1.4| Add the description of SMT stencil| Jun. 2021
R1.5| Update power supply VCC and V_BCKP| Aug. 2021
R1.6| Add the Note in Section 4.3| Nov. 2021
R1.7| If hot start is not used, connect V_BCKP to VCC.

Revise the VSWR in section 1.2

| Nov. 2022

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 , “UNICORECOMM” and another trade name, trademarks, icon, logo, brand names 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 commitment 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 offers you information in the features of the hardware, the installation, specification and use of UNICORECOMM UM220-IV NL product. Reader it applies to This document is applied to the technicians who know GNSS Receiver to some extent but not to the general readers.

Structure of the file

This document includes the following:

• Introduction: Briefly explain the functions, performances and installation of the product
• Installation: Contains the list of the product package and the details of the product installation
• Technical Specification: Offering technical specifications of the product
• Hardware Specification: Offering all the information of the hardware interface of the product
• Mechanical Features: Offering UM220-IV NL dimensions, layout, and top views.

Introduction

Overview

Unicore UM220-IV NL is a multisystem GNSS module. Based on UNICORECOMM’s low- power GNSS SoC-UFirebird design, and the support of BDS B1+GPS L1 dual system joint positioning or single system joint positioning and the QZSS signal can be received. And support AGNSS. In the case of networking, the positioning speed is improved through UNICORECOMM assist data service. UM220-IV NL is compact in size and uses SMT pads to support fully automatic integration of standard discharge and reflow soldering, especially suitable for low-cost and low-power consumption fields.

Module

|

Model

|

PN

|

Standard

|

System

|

Interface

| Data updating

rate

---|---|---|---|---|---|---

Professional

|

Automotive

| GPS| BDS| GLONASS| QZSS| UART1| UART2|
UM220- IV NL| GB| 080101016200| ●|  | ●| ●|  | ●| ●| ●| 1Hz

Note: The model (GB) display in the lower left corner of the module

Key Features

Power

Voltage| +3.0~3.6 VDC
Power consumption1| 50mW
RF Input
Input VSWR| ≤2.5|
Input impedance| 50Ω|
Antenna gain| 15～30dB|
Physical Characters
Dimension| 16.012.22.4mm|
Weight| 0.8g|
Environment
Operating Temperature| -40˚C ~ +85˚C|
Storage Temperature| -45˚C ~ +90˚C|
RoHS| Accord|
Input/ Output Data Interface
UART| 2 UART, LVTTL. Baud rate 4800～115200bps|
GNSS Performance
Frequency| BDS B1：1561.098MHz

GPS L1：1575.42MHz

|

TTFF

| Cold Start：28s Hot Start：1s Reacquisition：1s

AGNSS2：4s

|
Positioning accuracy3| 2.0m (Dual system Horizontal, Open sky)

3.5m (Dual system vertical, Open sky)

|
Velocity accuracy (RMS)| 0.1m/s(Dual system Horizontal, Open sky)|

Sensitivity4

|  | GN| BDS| GPS
Tracking| -160dBm| -159dBm| -160dBm
Acquisition| -147dBm| -146dBm| -147dBm
Hot Start| -151dBm| -150dBm| -151dBm
Reacquisition| -158dBm| -157dBm| -158dBm
1PPS(RMS) 5| 20ns|
Data update rate| 1Hz|
Data Output6| NMEA 0183，Unicore Protocol|

1. Continuous positioning typical value
2. Timely input of assist data
3. CEP, 50%
4. When C/N0 is 41db
5. 1hour statistics, timing is not recommended.
6. User can be configured, refer to《Unicore NPL Protocol Specification Ver.3.1》 document or update version for details

Interface

UART

UM220-IV NL module COM1 is the primary serial port, which supports data transfer and firmware upgrade function. The signal input/output level is LVTTL. The default baud rate is 9600bps, and is adjustable, can be configured up to 115200bps. During design in, please ensure that COM1 is connected to a PC or an external processor for firmware upgrades. COM2 only supports data transmission, and cannot be used for firmware upgrade purpose, reserved for future use. 1PPS UM220-IV NL outputs 1PPS with adjustable pulse width and polarity

Product Installation

Installation Preparation

UM220-IV NL Modules are Electrostatic Sensitive Devices and require special precautions when handling：

•  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 shall be carried out in an antistatic workbench, using both wearing an antistatic wrist strap and a conductive foam pad. If antistatic workbench is not available, wear an antistatic wrist strap and connect the other end to a metal frame to play a role in anti-static
• Hold the edge of the module, not in direct contact with the components
• Please check carefully whether the module has obviously loose or damaged components.

If you have questions, please contact us or your local dealer.

Figure 2-1 shows the typical installation of UM220-IV NL EVK suites

Please check the contents of the package carefully after receiving the package of UM220-IV NL:

• UM220-IV NL EVK suite（with AC Adapter）
• UM220-IV NL User manual
• uSTAR application package
• Qualified antenna
• Antenna connection cable
• Direct serial cable
• PC or Laptop with serial ports (Windows 2000/xp/win7)

Please keep the box and anti-static plastic bags for storage and handling

Hardware Installation

After the above preparation is complete, follow the steps below to install:

• Step 1  Make sure to take full anti-static measures, such as anti-static wrist strap, grounding the workbench;
• Step 2：Open the UM220-IV NL evaluation kit;
• Step 3：Select the GNSS antenna with appropriate gain, fix it in the non-block area, using the appropriate cable to connect the antenna with UM220 EVK;
• Step 4：Connect the PC to the EVK serial port through direct serial cable;
• Step 5：Power the evaluation board and initialize the UM220-IV NL;
• Step 6：Open the star
• Step 7：Controlled the receiver through uSTAR to display constellations view, log messages, and receiver status.

Technical Specifications

Electrical Specifications

Absolute Maximum Rating

Operation Condition

mA

High-Level Output Voltage| Vout_high| Vcc–0.4|  |  | V| Iout = 8 mA
Antenna Gain| Gant| 15|  | 30| dB|
Noise Figure| Nftot|  | 2|  | dB|
Operating Temperature| Topr| -40|  | 85| ℃|

Dimensions

Pin Definition（Top View）

1

|

nRESET

|

I

|

LVTTL

| For reset, Low level active, if you do not use the pin, please leave it hanging
2| AADET_N| I| LVTTL| Antenna detection
3| TIMEPULSE| O| LVTTL| Time pulse(1PPS)
4| NC| I| LVTTL| reserve
5| GPIO2| I| LVTTL| Antenna detection
6| TXD2| O| LVTTL| UART 2-TX
7| RXD2| I| LVTTL| UART 2-RX
8| NC|  |  | reserve
9| VCC_RF| O| =VCC| Output voltage RF section
10| GND| —|  | Ground
11| RF_IN| I|  | GNSS signal input (BDS B1+GPS L1）
12| GND| —|  | Ground
13| GND| —|  | Ground
14| NC|  |  | reserve
15| NC|  |  | reserve
16| NC|  |  | reserve
17| NC|  |  | reserve
18| NC| I/O| LVTTL| reserve
19| NC| I/O| LVTTL| reserve
20| TXD1| O| LVTTL| UART 1-TX
21| RXD1| I| LVTTL| UART 1-RX
No| Name| I/O| Electrical level| Description
---|---|---|---|---

22

|

V_BCKP

|

I

|

1.65V~3.6V

| Backup voltage supply

If you do not use the hot start function, connect V_BCKP to VCC. Do NOT connect it to the ground or leave it floating.

23| VCC| —| 3.0V~3.6 V| Main power
24| GND| —|  | Ground

PCB Packaging

In the design of PCB solder, make sure the area the UM220-IV NL modules are fully covered with solder layer

Hardware Design
4.1 Design in Considerations
To make UM220-IV NL to work properly, you need to properly connect the following：

• Recommended in serial concatenated RX place 1 K Ω resistance, TX concatenated 33 Ω or 1 KΩ resistance, other need PIO concatenated 4.7 K resistor in the pin.
• Connect all the GND pins to the ground.
• Connect the RF_IN signal to the antenna, and the line will keep 50Ω impedance matching.
• Ensure COM1 is connected to a PC or an external processor, users can use this serial port to receive position data. COM1 is also necessary for firmware upgrades. In order to obtain good performance, special concern should be paid during the design：
• Power supply: Stable and low ripple power is necessary for good performance. Make sure the peak-to-peak voltage ripple does not exceed 50mV.
  • Using LDO to ensure the purity of the power supply
  • Try to place LDO close to the module in the layout
  • Widening the power circuit or use a copper pour surface to transmit the current
  • Avoid walking through high-power or high-inductance devices such as magnetic coil
• UART interfaces: Ensure that the signals and baud rate of main equipment match the UM220-IV NL module’s
• Antenna interface: Make sure the antenna impedance matches and the circuit is short and smooth, try to avoid an acute angle
• Antenna position: In order to ensure a good signal-to-noise ratio, the antenna is well isolated from the electromagnetic radiation source, especially the electromagnetic radiation in the frequency range of 1559 ~ 1607MHz
• Try to avoid circuits below UM220-IV NL
• 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.

Avoid Power Connection

Module input port (UM220-IV NL including RXD, GPIO) when the module is not powered on, if there is data input in the above port, it will form a series of power on the module VCC. When the series voltage is higher than 1.6v, it may cause the failure to start up when the module is powered on.

Solution：

When the module is not powered on, make sure that the IO port connected by the module is in a high-resistance state or a low level to avoid a power connection. Or in the serial concatenated 1KΩ resistor RX, TX concatenated 33Ω or 1K resistor, other need PIO concatenated 4.7KΩ resistor in the pin.

Antenna

If UM220-IV NL used the +3V active antenna, suggest use the VCC_RF pin output is recommended to power the antenna through feed inductance

Note: If the user has a high requirement for ESD (> ± 2000 V), the user should consider another method to feed the antenna rather than using the VCC_RF pin. In this case, it is recommended to choose a power supply chip with high ESD protection level. Gas discharge tube, varistor, TVS tube and other high-power protective devices may also be used in the power supply circuit to further protect the module from ESD damage or other Electrical Over-Stress (EOS). If the UM220-IV NL uses an active antenna other than +3V, the bias voltage required by the antenna V_BIAS is supplied to the antenna through a feed inductor

If UM220-IV NL uses a passive antenna, the antenna is directly connected to the RF_IN pin, while VCC_RF can be suspended. It should be noted that the use of passive antennas may cause a decrease in GNSS performance compared to active antennas

Serial Port

UM220-IV NL has two LVTTL serial port, for PC connection, please use an RS232 voltage level converter.

Disassembly

When it is necessary to remove the module, it is recommended to melt the soldering tin of the pins on both sides of the module with an electric soldering iron and remove the module with tweezers. Do not use other means to remove the module (such as hot air gun blowing module), may lead to module damage.

Package

Product Label Description

Package Description

The UM220-IV NL module is packaged in a vacuum-sealed aluminum foil anti- static bag with a desiccant and moisture-proof agent. When using the reflow welding process to weld modules, please strictly comply with IPC standard to conduct humidity control on modules. As packaging materials such as carrier belt can only withstand the temperature of 65 degrees Celsius, modules shall be removed from the packaging during baking. A small number of samples (usually by hand welding) are shipped in an electrostatic bag, since manual welding does not need to consider the problem of humidity, so no additional moisture protection.

Reel size

| workpiece tray: 13″

external diameter 330mm, internal diameter 100mm, wide 24mm, thickness 2.0mm

Carrier tape| Space between: 20mm

Check the humidity indicator card before soldering. The 30% indication is blue for normal conditions, as shown in figure 6-2. Bake modules firstly before soldering if the 30% indication turns pink, as shown in figure 6-3. The UM220-IV M modules are rated at MSL level 3, for more MSL information, please refer to www.jedec.org

The shelf life of UM220-IV NL is one year.

Clean

Do not use alcohol or other organic solvents to clean, it may lead to flux residues into the shielding shell, causing mildew and other problems

Reflow Soldering

In order to avoid device falling off, the module should be placed on the top of the main board during welding. Reflow soldering temperature curve is recommended as shown in figure 8-1 below (M705-GRN360 is recommended for solder paste).

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 0.15mm, and 0.18mm is recommended.

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

References

• Home | JEDEC
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