unicore UM220-IV NL Industry Grade Multi GNSS Positioning Module User Manual

unicore UM220-IV NL Industry Grade Multi GNSS Positioning Module

Revision History

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 notes in Section 4.4| Nov. 2021

R1.7

| If hot start is not used, connect V_BCKP to VCC. Revise the VSWR in section 1.2|

Nov. 2022

R1.8

| Optimize the description of antenna power supply; Add Chapter 4.3 Power Supply Requirements|

Apr. 2023

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, and 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, 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 commitment or warranty on the part of Unicore concerning 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 about 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 on the features of the hardware, the installation, specification and use of the 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 explaining the functions, performances and installation of the product Installation: Contains 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 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 low- power GNSS SoC-UFirebird design, and the support of BDS B1+GPS L1 dual system joint positioning or single system joint positioning 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 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) is displayed 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|  |

Interface

Figure 1-2 Structure Chart
CART
UM220-IV NL module COM1 is the primary serial port, which supports data transfer and firmware upgrade functions. The signal input/output level is LVTTL. The default baud rate varies according to the version of firmware, and the baud rate can be configured up to 115200bps7. During design, 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 upgrades When C/N0 is 41db 5 1-hour statistics, timing is not recommended. 6, 7 Can be configured by users, refer to UFirebird_Standard Positioning Products Protocol Specification for details purposes, 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 an antistatic wrist strap and 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 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 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 an 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 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 of the UM220-IV NL modules is fully covered with a solder layer

Hardware Design
Design in Considerations
To ensure that UM220-IV NL works properly, please pay attention to the following:

• Recommended to connect 1 KΩ resistance at RX serial ports, and 33 Ω or 1 KΩ resistance at TX serial ports; other necessary PIOs require 4.7 KΩ resistance connected in series at the pin.
• The resistance can be adjusted slightly according to the application to achieve a better effect.
• 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.

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 using 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 matching and the circuit is short and smooth, try to avoid an acute angle
• Antenna position: 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 temperature changes will result in reduced performance, keep it as far away from the high-power high-temperature air and heating devices as possible.

Avoid Power Leakage
When the module is not powered on, if there is data input at the input ports (including RXD and GPIO), it will cause power leakage on the VCC. When the leakage voltage is higher than 1.6 V, it may cause failure to start up when the module is powered on.

Solution
When the module is not powered on, make sure that the IO ports connected to the module are in a high-resistance state or a low level to avoid power leakage. You can also connect a 1KΩ resistor at the RX ports and a 33Ω or 1KΩ resistor at the TX ports, and connect a 4.7KΩ resistor at other necessary PIOs.

Power Supply Requirements
Main Supply (VCC)
The voltage range of VCC is 3.0 V ~ 3.6 V.

Notes

• The VCC initial level when power-on should be less than 0.4 V.
• The VCC ramp when power-on should be monotonic, without plateaus.
• The voltages of undershoot and ringing should be within 5% VCC.
• VCC power-on waveform: The time interval from 10% rising to 90% must be within 100 μs ~ 10 ms.
• Power-on time interval: The time interval between the power-off (VCC < 0.4 V) to the next power-on is recommended to be larger than 500 ms.

Backup Supply (V_BCKP)
If the hot start function is needed, users should supply backup power to the module. The voltage range of V_BCKP is 1.65 V ~ 3.6 V.
Notes

• The V_BCKP initial level when power-on should be less than 0.4 V.
• The V_BCKP ramp when power-on should be monotonic, without plateaus.
• The voltages of undershoot and ringing should be within 5% V_BCKP.
• V_BCKP power-on waveform: The time interval from 10% rising to 90% must be within 100 μs ~ 10 ms.
• Power-on time interval: The time interval between the power-off (V_BCKP < 0.4 V) to the next power-on is recommended to be larger than 500 ms.
• The V_BCKP pin cannot be floating or connected to the ground. When V_BCKP is not used, it should be connected to VCC or connected to backup power.

Antenna
If the UM220-IV NL uses an active antenna, the bias voltage V_BIAS is supplied to the antenna through a feed inductor. It’s recommended to use an independent power as V_BIAS to supply the antenna.

• If the antenna power supply and the module’s main supply VCC use the same power rail, the ESD, surge and overvoltage from the antenna will have an effect on the VCC, which may cause damage to the module.
• Therefore, it’s recommended to design an independent power rail for the antenna to reduce the possibility of damage to the module.
• If UM220-IV NL uses a passive antenna, the antenna can be directly connected to the RF_IN pin. It should be noted that the use of passive antennas may cause a decrease in GNSS performance compared to active antennas.

Reset

If the reset pin nRESET of the UM220-IV NL 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 5 ms can also reset the module.

Serial Port
UM220-IV NL has two LVTTL serial ports, 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 aluminium 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 standards to conduct humidity control on modules. As packaging materials such as carrier belts 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 first 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.

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
To avoid the device falling off, the module should be placed on the top of the main board during welding. A 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 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, China, 100094
www.unicorecomm.com
Phone: 86-10-69939800
Fax: 86-10-69939888
info@unicorecomm.com

References

• Home | JEDEC
• 和芯星通北斗导航芯片-北斗导航模块北斗高精度定位板卡国内外领先的芯片、OEM板卡和产品解决方案提供商
• 和芯星通北斗导航芯片-北斗导航模块北斗高精度定位板卡国内外领先的芯片、OEM板卡和产品解决方案提供商

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