unicorecomm UM220-IV NV Automotive Grade Multi GNSS User Manual

unicorecomm UM220-IV NV Automotive Grade Multi GNSS

Product Information

The UM220-IV NV is an automotive-grade multi-GNSS positioning module manufactured by Unicore Communications. It features high-accuracy positioning, a compact size, low power consumption, and is compatible with a range of GNSS systems including GPS,
GLONASS, BeiDou, QZSS, and Galileo. The product is designed for use in automotive applications, including vehicle navigation, anti-theft systems, and telematics.

Key Features

• Multi-GNSS Support
• High Accuracy Positioning
• Low Power Consumption
• Compact Size
• Automotive Grade

Technical Specifications

• Electrical Specifications: The product operates at a voltage range of 3.3V to 5.5V with a typical current consumption of 25mA.
• Operation Condition: The product can operate at a temperature range of -40°C to +85°C and a humidity range of 5% to 95% non-condensing.
• Dimensions: The product measures 16mm x 12.2mm x 2.1mm.
• Pin Definition: The product includes eight pins for power supply, serial communication, and GNSS signals.
• PCB Packaging: The product comes in a surface-mount package designed for easy integration into electronic devices.

Hardware Design

• Design Considerations: The product is designed to be easy to integrate into electronic devices and includes a range of features to ensure reliable operation.
• Avoid Power Connection: The product is designed to avoid power connection issues, and the user manual includes a note on connecting V_BCKP to VCC if hot start is not used.
• Reset: The product includes a reset function that can be activated by connecting the RST pin to the VCC pin.
• Antenna: The product includes an antenna input for connecting an external GNSS antenna.
• Serial Port: The product includes a UART serial port for communication with other devices.

Product Usage Instructions

To use the UM220-IV NV positioning module, first prepare for installation by ensuring you have the necessary hardware and tools. Then follow the hardware installation instructions provided in the user manual. Connect the required power supply, GNSS antenna, and serial communication pins as per the pin definition provided in section 3.4. Once connected, the module will begin operation and output GNSS positioning data via the serial port. Detailed information on the operation parameters and configuration can be found in section 4 of the user manual.

UM220-IV NV
Automotive Grade Multi-GNSS Positioning Module 

Revision History

Version 1.0

| Dec.2017
Ver. 1.0.1| Alpha release. Update definition name and performance

parameter of pins

| Oct.2018

Ver. 1.0.2

| Alpha release. Update reflow soldering information; Update product label description;

Update product Mechanical Layout;

|

May.2019

R1.1

| Chapter 4.1: revise the frequency range in the description of antenna position

Chapter 6.2 Package description: add the shelf life

|

Sep. 2019

R2

| Chapter 6.2: revise the MSL instructions

Revise the following parameters: power consumption, Iccp, IACQ and Input VSWR

1.1 Overview：add the product PN and HW version

|

Feb. 2020

R3| Update parameters| Feb. 2020
R3.1| Add description on reset and stencil| Jun. 2021
R3.2| Update power supply VCC and V_BCKP| Aug. 2021
R3.3| Perfect the product information in the Table in section 1.1

Add the Note in Section 4.4

| Nov.2021
R3.4| If hot start is not used, connect V_BCKP to VCC.| 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 NV-GN 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 file
This document includes the following:
Introduction : Briefly explaining the functions, performances and installation 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 Mechanical Features: Offering UM220-IV NV-GN dimensions, layout, and top views.

Introduction

Overview
UNICORECOMM UM220-IV NV-GN is a multisystem GNSS module. It is designed on the basis of UNICORECOMM’s low power GNSS SoC-UFirebirdTM and supports GPS L1+BDS B1/GLONASS+Galileo+QZSS dual-system joint positioning or single system positioning. It can receive the QZSS signal and support AGNSS. When connected to network, the positioning speed will be improved by UNICORECOMM’s assist data service.
UM220-IV NV-GN 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.

Model

|

PN

|

Standard

|

System

|

Interface

| Data Updating

Rate

---|---|---|---|---|---
Professional| Automotive| GPS| GLONASS| BDS| Galileo| QZSS| SBAS*| UART1|

UART2

|

UM220-IV NV-GN

| 2310408000023| | ●| ●| ●| ●| ●| ●| ●| ●| ●| 1Hz
2330322000033| | ●| ●| | ●| ●| ●| ●| ●| ●| 1Hz

*Only supported by the firmware with revision of 3.4.0 or above
Notice: Module order number (GN) is displayed in the lower left corner of the module
(see chapter 6.1). Automotive grade product is certified by AEC-Q100 and TS16949. The operating temperature range of automotive grade and industrial grade product is -40℃ ~ +85℃.

Key Features

Power

Voltage| +3.0~3.6 VDC
Power Consumption1| 90mW
RF Input
Input VSWR| ≤2.5
Input Impedance| 50Ω
Antenna Gain| 15～30dB
Physical Characteristics
Dimension| 16.012.22.4mm
Weight| 0.8g
Environment
Operating Temperature| -40℃ ~ +85℃
Storage Temperature| -45℃ ~ +90℃
RoHS| Accord
Input/ Output Data Interface
UART| 2 UART, LVTTL. Acceptable baud rate 9600～460800bps
GNSS Performance

Frequency

| BDS B1: 1561.098MHZ GPS L1: 1575.42MHZ GLO L1: 1602.5625MHZ

Time to First Fix 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)

1 Continuous positioning，typical value
2 Timely input of assist data
3 CEP, 50%

Velocity Accuracy (RMS)|

0.1m/s(Dual system horizontal, open sky)

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

Sensitivity4

| | GN| BDS| GPS| GLONASS
Tracking| -161dBm| -159dBm| -161dBm| -158dBm
Acquisition| -147dBm| -144dBm| -147dBm| -142dBm
Hot Start| -154dBm| -149dBm| -154dBm| -148dBm
Reacquisi- tion|

-157dBm

|

-156dBm

|

-157dBm

|

-153dBm

1PPS(RMS) 5| 20ns| | | |
Data Update Rate| 1Hz| | | |
Data Output6| NMEA 0183，Unicore Protocol| |

Interface

UART
UM220-IV NV-GN 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 115200bps, which is adjustable, and can be configured up to 460800bps. 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. It is reserved for future use.
1PPS
UM220-IV NV-GN outputs 1PPS with adjustable pulse width and polarity.

Product Installation

Installation Preparation
UM220-IV NV-GN 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 prevent the damage of ESD
• 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.

Please check the contents of the package carefully after receiving the package of UM220-IV NV-GN.

• UM220-IV NV-GN EVK suite (with AC Adapter)
• UM220-IV NV-GN User manual
• uSTAR application package
• Qualified antenna
• Antenna connection cable
• Direct serial cable
• PC or Laptop with serial ports (Win7 or above)

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

Hardware Installation
After the above preparations, 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 NV-GN evaluation kit;
• Step 3： Select the GNSS antenna with appropriate gain, fix it in a 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 NV-GN;
• Step 6 ：Run the uSTAR
• Step 7： Control the receiver through uSTAR to display constellations view, log messages, and receiver status.

Technical Specifications

Electrical Specifications
Absolute Maximum Ratings

Operation Condition

**Dimensions

**

Table 3-1: 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, GPS L1+GLONASS 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

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 ground or leave it floating.

23| VCC| —| 3.0V~3.6 V| Main power
No| Name| I/O| Electrical level| Description
---|---|---|---|---
24| GND| —| | Ground

PCB Packaging

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

Hardware Design

Design in Considerations
To make UM220-IV NV-GN work normally, please properly connect the following:

• 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 NV module
• Antenna interface: Make sure the antenna impedance matches, and the cable is short and smooth, 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 the electromagnetic radiation in the frequency range of 1559 ~ 1607MHz
• Try to avoid designing in any circuits underneath UM220-IV NV-GN
• This module is a temperature sensitive device, dramatic changes in temperature will result in reduced performance. Keep it away as far as possible from any high-power high-temperature air and heating devices.

Avoid Power Leakage
Module input ports of UM220-IV NV-GN 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 by the module is in a high-resistance state or a low level to avoid power leakage.

Reset
If the reset pin nRESET of UM220-IV NV-GN module needs to be used, the following timing requirements must be met between the nRESET and the power supply VCC. During normal operation of the module, pulling down the nRESET pin over the 5ms can also reset the UM220-IV NV-GN.

Antenna
If UM220-IV NV-GN uses s +3V active antenna, it is suggested 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 NV-GN 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.

If UM220-IV NV-GN uses a passive antenna, the antenna should be directly connected to 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 NV-GN has two LVTTL serial ports, 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 module), or it may lead to module damage.

Package

Product Label Description

Package Description
The UM220-IV NV-GN module is packaged in vacuum sealed aluminum foil anti- static bag 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 should be removed from the packaging during baking.

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 NV-GN modules are rated at MSL level 3. For more MSL information, please visit www.jedec.org. The shelf life of UM220-IV NV-GN is one year.

Clean

Do not use alcohol or other organic solvents to clean, or it may lead to flux residues seeping 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

References

• Home | JEDEC
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