User's Manual

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Table Of Contents

 2017 Microchip Technology Inc. Preliminary DS00000000A-page 1

LG8271/LG9271

General Features

• Supports LoRa

/LoraWAN™ Technology RF

Packets

• Up to eight receive and one transmit channel(s)

• UART (TTL) interface with built-in control protocol

• Compact form factor 90.0 mm x 30.0 mm

• mPCIe physical connector

• Environmentally friendly RoHS compliant

• Compliance:

- LG8271: Certified to R&TTE RF Standards

- LG9271: Certified to FCC Modular Transmit-

ter Standards

• Device Firmware Upgrade (DFU) over UART, see

“LoRa

Technology Gateway Module Software

Specifications”

Operational

• Single operating voltage: 3.0V to 3.6V (3.3V

nominal)

• Temperature range: -40 to +85 °C

• Supports LoRa Technology (12.5 kbps) and FSK

(EU only) (up to 300 kbps) modulations

• Integrated frequency matched RF front end, RF

transceiver, baseband processor, and MCU

Description

Microchip's LG8271/LG9271 Low-Power Long Range

(LoRa) Technology transceiver modules provide an

easy to use, low-power solution for long range wireless

data reception. Each module provides eight LoRa

Technology receive channels (125 kHz Bandwith

(BW)). In addition to the eight LoRa Technology

receive channels, the modules provide two additional

receive channels. The first is a LoRa Technology mod-

ulation receive channel capable of 125, 250 or 500 kHz

BW). The second provides an FSK/GFSK (EU only)

receive channel.

Beyond its receiver capability, the modules provide a

single flexibly transmit channel. This transmit channel

is capable of both LoRa Technology and FSK/GFSK

modulations at multiple bandwidths (LoRa Technology)

or baud rates (FSK/GFSK).

The multi-channel, flexible nature of these modules

makes them ideal for use in LoRa Technology gateway

applications.

The advanced command protocol available over the

UART interface provides complete control over the full

capabilities of RF subsystem in addition to packet

reception and transmission.

Applications

Applications deploying LoRa Technology where gate-

way devices are required include:

• Automated Meter Reading

• Home and Building Automation

• Wireless Alarm and Security Systems

• Industrial Monitoring and Control

• Machine to Machine (M2M)

• Internet of Things (IoT)

Low-Power Long Range (LoRa

) Technology Gateway

Module for US (LG9271) and EU (LG8271)

Summary of content (24 pages)

PAGE 1
LG8271/LG9271 Low-Power Long Range (LoRa®) Technology Gateway Module for US (LG9271) and EU (LG8271) General Features • Supports LoRa®/LoraWAN™ Technology RF Packets • Up to eight receive and one transmit channel(s) • UART (TTL) interface with built-in control protocol • Compact form factor 90.0 mm x 30.
PAGE 2
LG8271/LG9271 Table of Contents Device Overview ................................................................................................................................................................................... 3 General Specifications .......................................................................................................................................................................... 7 Typical Hardware Connections .........................................................
PAGE 3
LG8271/LG9271 1.0 DEVICE OVERVIEW The LG8271/LG9271 transceiver modules feature LoRa Technology RF modulation, which provides long range spread spectrum communication with high interference immunity. Each module supports eight (8) receive channels allowing it to receive up to eight LoRa Technology modulated packets simultaneously. By using LoRa Technology modulation technique, LG8271/LG9271 can achieve a receiver sensitivity of -146 dBm.
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LG8271/LG9271 FIGURE 1-3: BLOCK DIAGRAM Debug I/Q SPI PIC24FJ128GB204 LoRa Baseband Semtech SX1301 UART RFE SX1257 RF Switch, PA / LNA RFE, etc. I/Q RFE SX1257 24LC08B EEPROM Table 1-1 describes the pins of the module.
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LG8271/LG9271 TABLE 1-1: PIN DESCRIPTION (CONTINUED) Pin Symbol Type 29 GND Power 30 HOST_CLK Input Host I2C Clock 31 NC — Not Connected 32 HOS_SDA Input/Output HOST I2C Data 33 NC — Not Connected 34 GND Power Ground Supply Terminal 35 GND Power Ground Supply Terminal 36 USB_D- — 37 GND Power 38 USB_D+ — 39 VDD Power Positive Supply Terminal 40 GND Power Ground Supply Terminal 41 VDD Power Positive Supply Terminal 42 LED1 Output LED1 Output 43 GND P
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LG8271/LG9271 NOTES: DS00000000A-page 6 Preliminary  2017 Microchip Technology Inc.
PAGE 7
LG8271/LG9271 2.0 GENERAL SPECIFICATIONS Table 2-1 provide the general specifications for the module. Table 2-2 through Table 2-4 provide the electrical characteristics, RF receiver charactersitics, LoRa Technology data rate and sensitivity versus spreading factor. TABLE 2-1: GENERAL SPECIFICATION Specification Frequency Band - LG9271 Description 902.000 MHz to 928.000 MHz Frequency Band - LG8271 863.000 MHz to 870.
PAGE 8
LG8271/LG9271 TABLE 2-2: ELECTRICAL CHARACTERISTICS (CONTINUED) Parameter Min. Typ. Max. Units Input Leakage at +60°C (VSS
PAGE 9
LG8271/LG9271 Table 2-5 through Table 2-7 provide the current consumption, dimensions of the modules and the RF output power versus TX power settings. TABLE 2-5: CURRENT CONSUMPTION (3.3V) Current (Typical) mA Mode Current (Max.) mA RF Idle 75 100 RX Active 570 850 TX Active 570 900 TABLE 2-6: MODULE DIMENSIONS Parameter Value Dimensions 90.0 x 30.
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LG8271/LG9271 NOTES: DS00000000A-page 10 Preliminary  2017 Microchip Technology Inc.
PAGE 11
LG8271/LG9271 3.0 TYPICAL HARDWARE CONNECTIONS Figure 3-1 shows the typical hardware connections for the module. Interfacing to the module requires connecting to the signals provided on the mPCIe connector as listed in Table 1-1. Specific interface connection are discussed in this chapter. FIGURE 3-1: HARDWARE CONNECTIONS Antenna mPCIe Interface LGx271 Gateway Module 3.1 Host MCU INTERFACE TO HOST MCU 3.
PAGE 12
LG8271/LG9271 3.6 PCI_DETECT The LG8271/LG9271 modules have an input signal used to select the active host interface. The signal is sampled at module start up and the selected interface is initialized and configured. A LOW signal on this line at start up selects the SPI interface (unsupported). A HIGH signal on this line selects the UART interface. 3.7 LED OUTPUTS The LG8271/LG9271 modules have three buffered outputs that can sink sufficient current to activate off board LEDs.
PAGE 13
LG8271/LG9271 4.0 APPLICATION INFORMATION 4.1 Physical Dimensions Figure 4-1 and Figure 4-2 illustrate the physical dimensions of the LG8271/LG9271 modules. FIGURE 4-1: TOP AND BOTTOM VIEW  2017 Microchip Technology Inc.
PAGE 14
LG8271/LG9271 FIGURE 4-2: 4.2 TOP VIEW WITH SHIELD AND SIDE VIEW Approved Antennas Modular certification of the LG9271 module is performed with the external antenna type in Table 4-1. For specific regulatory requirements by country, refer to Section 5.0 “Regulatory Approval”. TABLE 4-1: TESTED EXTERNAL ANTENNA TYPES Type Gain (dBi) Sleeve Dipole 5 DS00000000A-page 14 Preliminary  2017 Microchip Technology Inc.
PAGE 15
LG8271/LG9271 5.0 5.1.2 REGULATORY APPROVAL This section outlines the regulatory information for the LG8271/LG9271 module for the following countries: From R&TTE Compliance Association document Technical Guidance Note 01: • Europe (LG8271) • United States (LG9271) 5.1 Provided the integrator installing an assessed radio module with an integral or specific antenna and installed in conformance with the radio module manufacturer's installation instructions requires no further evaluation under Article 3.
PAGE 16
LG8271/LG9271 5.2 5.2.1 United States The LG9271 module has received Federal Communications Commission (FCC) CFR47 Telecommunications, Part 15 Subpart C “Intentional Radiators” modular approval in accordance with Part 15.212 Modular Transmitter approval. Modular approval allows the end user to integrate the LG9271 module into a finished product without obtaining subsequent and separate FCC approvals for intentional radiation, provided no changes or modifications are made to the module circuitry.
PAGE 17
LG8271/LG9271 5.2.2 RF EXPOSURE All transmitters regulated by FCC must comply with RF exposure requirements. KDB 447498 General RF Exposure Guidance provides guidance in determining whether proposed or existing transmitting facilities, operations or devices comply with limits for human exposure to Radio Frequency (RF) fields adopted by the Federal Communications Commission (FCC). From the LG9271 FCC Grant: Output power listed is conducted.
PAGE 18
LG8271/LG9271 User manuals for transmitters equipped with detachable antennas shall also contain the following notice in a conspicuous location: This radio transmitter (identify the device by certification number, or model number if Category II) has been approved by Industry Canada to operate with the antenna types listed below with the maximum permissible gain and required antenna impedance for each antenna type indicated.
PAGE 19
LG8271/LG9271 APPENDIX A: REVISION HISTORY Revision A (March 2017) This is the initial released version of the document.  2017 Microchip Technology Inc.
PAGE 20
LG8271/LG9271 NOTES: DS00000000A-page 20 Preliminary  2017 Microchip Technology Inc.
PAGE 21
RN4678 THE MICROCHIP WEB SITE CUSTOMER SUPPORT Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers.
PAGE 22
LG8271/LG9271 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, for example, on pricing or delivery, refer to the factory or the listed sales office. I PART NO.
PAGE 23
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 24
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