unicorecomm UM220-IV M0 Industry Grade Multi-GNSS User Manual

unicorecomm UM220-IV M0 Industry Grade Multi-GNSS

Product Information

The UM220-IV M0 is an industry-grade multi-GNSS positioning module designed for high-precision positioning and navigation applications. It supports multiple GNSS constellations, including GPS, GLONASS, Galileo, and Beidou. The module includes a built-in LNA and SAW filter for improved sensitivity and noise reduction, and it has a small form factor for easy integration into various applications.

Key Features

• Industry-grade multi-GNSS positioning module
• Supports multiple GNSS constellations: GPS, GLONASS, Galileo, and Beidou
• Built-in LNA and SAW filter for improved sensitivity and noise reduction
• Small form factor for easy integration into various applications
• Hardware version 2.3 released with updated parameters

Technical Specifications

Electrical Specifications:

• Power supply: 3.3V DC
• Power consumption: <100mA
• Output level: TTL level
• Baud rate: 9600bps (default), configurable up to 115200bps

Operation Condition:

• Operating temperature: -40°C to +85°C
• Storage temperature: -40°C to +105°C
• Humidity: 5% to 95% non-condensing

Dimensions:

• Module size: 16mm x 16mm x 6.3mm
• Antenna connector: U.FL

Pin Definition (Top View)

Product Usage Instructions

Product Installation

Installation Preparation:

1. Prepare a power supply of 3.3V DC
2. Prepare an antenna with a U.FL connector
3. Obtain the necessary cables and connectors for hardware installation

Hardware Installation:

1. Connect the power supply to the VCC and GND pins of the module
2. Connect the antenna to the ANT pin of the module
3. Connect the serial port of the module to the UART interface of the host device using appropriate cables and connectors

Disassembly

If disassembly is necessary, carefully remove the module from the host device, taking care not to damage any components or connections.

Package

The UM220-IV M0 module is typically shipped in a protective anti-static packaging to prevent damage during transport and storage.

Revision History

R2.2

| Update power supply VCC and V_BCKP;
Add different PN information and corresponding solutions to avoid string power|

Nov. 2021

R2.3| Add the Note in Section 4.3| Nov. 2021
R2.4| If hot start is not used, connect V_BCKP to VCC.
Revise the VSWR in section 1.2| Nov. 2022

Disclaimer
Information in this document is subject to change without notices and does not represent a commitment on the part of Unicore Communication, Inc. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose without the express written permission of a duly authorized representative of Unicore Communications, Inc. The information contained within this manual is believed to be true and correct at the time of publication.
© Copyright 2009-2022 Unicore Communications, Inc. All rights reserved.

Foreword
This document offers you information in the features of the hardware, the installation, specification and use of UNICORECOMM UM220-IV M0 product.

Readers 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 Document
This document includes the following:
Introduction: Briefly explaining the functions, performances and installing of the product
Installation: Containing the list of the product package and the details of product installation
Technical Specification: Offering technical specifications of the product
Hardware Specification: Offering all the information of hardware interface of the product Module disassembly introduction
Package: Provide packing instructions of UM220-IV M0 modules

Introduction

Overview
UNICORECOMM UM220-IV M0 is a dual-system GNSS module. It is designed on the basis of UNICORECOMM’s low power, multisystem, high performance SoC-UFirebird designed. It supports BDS B1+GPS L1 dual-system joint positioning and single system positioning. UM220-IV M0 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. The radio equipment is in compliance with Directive 2014/53/EU.

Model

|

PN

| Grade| System| Interface| Data Updating Rate
---|---|---|---|---|---
Industry| Automotive| GPS| BDS| GLONASS| UART1| UART2|
UM220-IV M0| 2310408000024| ●| | ●| ●| ●| ●| | 1Hz
UM220-IV M0| 2330322000028| ●| | ●| ●| | ●| | 1Hz

Key Features

Power

Voltage| +3.0~3.6 VDC
Power Consumption| 90mW
RF Input
Input VSWR| ≤2.5
Input Impedance| 50Ω
Antenna Gain| 15～30dB
Physical Characteristics
Dimension| 10.19.72.2mm
Environment
Operating Temperature| -40℃ ~ +85℃
Storage Temperature| -45℃ ~ +90℃
RoHS| Compliant
Input/output Data Interface
UART| 1 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 AGNSS1: 4s
Positioning Accuracy2| 2.0m (dual-system horizontal, open sky)
3.5m (dual-system vertical, open sky)
Velocity Accuracy (RMS)| 0.1m/s (dual-system, Open sky)

Sensitivity

| | BDS| GPS
---|---|---|---
Tracking| -161dBm| -161dBm
Acquisition| -146dBm| -147dBm
Hot start| -154dBm| -155dBm
Reacquisition| -157dBm| -158dBm
1PPS Accuracy (RMS)| 20ns| |
Data Updating Rate| 1Hz| |
Data Output| NMEA 0183, Unicore Protocol|

Interface

UART
UM220-IV M0 module supports data transfer and firmware upgrade; the signal input/output level is LVTTL. The default baud rate is 9600bps, which is adjustable, and can be configured up to 115200bps.

1PPS
UM220-IV M0 outputs 1PPS with adjustable pulse width and polarity.

Product Installation

UM220-IV M0 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 should be carried out on an antistatic workbench, wear an antistatic wrist strap and use a conductive foam pad. If an 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 M0 EVK suites.

Please check the contents of the package carefully after receiving the package of UM220-IV M0:

• UM220-IV M0 EVK suite（with AC Adapter）
• UM220-IV M0 User manual.
• uSTAR application package.
• Antenna.
• Antenna connection cable
• Direct serial cable

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

Hardware Installation
After the above preparations are complete, follow the steps below to install:

• Step 1：Make sure to take full anti-static measures, such as wearing an anti-static wrist strap, grounding the workbench;
• Step 2：Open the UM220-IV M0 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 to 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 M0;
• Step 6：Open the uSTAR
• Step 7：Controlled the receiver through uSTAR to display constellations view, log messages, and receiver status.

Technical Specifications

Absolute Maximum Ratings

Operation Condition

High Level Input

Voltage

| Vin_high| 1.2| | | V|
Low Level Output Voltage| Vout_low| | | 0.4| V| Iout=-8 mA
High Level Output

Voltage

| Vout_high| Vcc–0.4| | | V| Iout=8 mA
Antenna Gain| Gant| 15| | 30| dB|
Nosie Figure| Nftot| | 2| | dB|
Operation Temperature| Topr| -40| | 85| ℃|

Dimensions

Table 3-1: Dimensions

Pin Definition (Top View)

6

|

V_BCKP

|

I

|

1.65V~3.6V

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

floating.

7| VCC_IO| I| 3.0V~3.6V| GPIO power supply
8| VCC| I| 3.0V~3.6V| Main power
9| nRESET| I| LVTTL| For reset, Low level active, if you do not use the pin, please leave it hanging
10| GND| I| | Ground
11| RF_IN| I| | GNSS signal input (BDS B1+GPS L1）
12| GND| I| | Ground
13| NC| O| | Reserve
14| VCC_RF3| O| =VCC| Output voltage RF section
15| NC| I/O| | Reserve
16| NC| I/O| | Reserve

VCC_RF does not have short circuit detection function;

Hardware Design

Design in Considerations
To make UM220-IV M0 work normally, you need to properly connect the following:
The Module VCC has good monotonicity. If the VCC power off and then on, the power off time must be more than 10ms.

• Connect all the GND pins to 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.
  • Use LDO to ensure the purity of power supply
  • Try to place LDO close to the module in layout
  • Widen the power circuit or use copper pour surface to transmit current
  • Avoid walking through any high-power or high inductance devices such as a magnetic coil
• UART interfaces: Ensure that the signals and baud rate of main equipment match that of UM220-IV M0 module
• Antenna interface: Make sure the antenna impedance matches, and the cable is short without any kinks , try to avoid acute angles
• Antenna position: In order to ensure a good signal-to-noise ratio, the antenna should be well isolated from any electromagnetic radiation source, especially an electromagnetic radiation in the frequency range of 1559 ~ 1605MHz
• Try to avoid designing in any circuits underneath UM220-IV M0
• This module is a temperature sensitive device. Dramatic changes in temperature will result in reduced performance, so keep it away as far as possible from any high-power high-temperature air and heating devices.

Avoid String Power
The module input ports of UM220-IV M0 include: RXD and GPIO. When the module is not powered on, if there is data input in the above ports, it will form a series of power on the module VCC. When the series voltage is higher than 1.6V, it may cause a failure of starting up when the module is powered on.
Solution:
When the module is not powered on, make sure that the IO port connected to the module is in a high-resistance state or a low level to avoid string power. Another solution is to connect a 1KΩ resistor in series to the serial port RX, and connect a 33Ω or 1KΩ resistor in series to TX (There is no need to connect any resistor to the TX of the module with PN 2310408000024). It is also recommended to connect a 4.7KΩ resistor in series to the Pin of other necessary PIOs.

Antenna
If UM220-IV M0 uses a +3V active antenna, it is recommended to use the VCC_RF pin output to power the antenna through a feed inductor.

Note: If the user has a high requirement for ESD (> ± 2000 V), the user should consider other 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 M0 uses an active antenna other than +3V, the bias voltage V_BIAS required by the antenna is supplied to the antenna through a feed inductor.

Figure 4-2 UM220-IV M0 Active Antenna (Other than +3V) Solution
If UM220-IV M0 uses a passive antenna, and the antenna is directly connected to RF_IN pin, the 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 M0 has one LVTTL serial port, for PC connection, please use a 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 using a hot air gun to blow the module), may lead to module damage.

Package

Product Label Description

Package Description
The UM220-IV M0 modules are packaged in vacuum sealed aluminum foil anti- static bags with desiccant and moisture-proof agent. When using 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.

Reel Size

| Workpiece tray: 13″
External diameter 330mm, internal diameter 100mm, width 24mm, thickness 2.0mm
Carrier Tape| Space between: 20mm

Check the humidity indicator card before soldering. The 30% indication is blue under 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 M0 modules are rated at MSL level 3, for more MSL information, please refer to www.jedec.org.

Figure 6-2 the 30% indication is blue

The shelf life of UM220-IV M0 is one year.

Clean

Do not use alcohol or other organic solvents to clean, or it may lead to flux residues flooding 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 module can only be welded 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 0.15mm, 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

References

• Home | JEDEC
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