Microchip Technology LG9271 Low-Power Long Range Technology Gateway Module User Manual LoRaGateway DS

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Document ID	3307639
Application ID	+4etoni0KWcLYlda4/GGyA==
Document Description	User Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	Yes
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	45.13kB (564170 bits)
Date Submitted	2017-03-08 00:00:00
Date Available	2017-09-01 00:00:00
Creation Date	2017-02-27 14:58:13
Producing Software	Acrobat Distiller 11.0 (Windows)
Document Lastmod	2017-02-27 15:01:06
Document Title	LoRaGateway_DS.book
Document Creator	FrameMaker 2015
Document Author:	M91355

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 30.0 mm
• mPCIe physical connector
• Environmentally friendly RoHS compliant
• Compliance:
- LG8271: Certified to R&TTE RF Standards
- LG9271: Certified to FCC Modular Transmitter Standards
• Device Firmware Upgrade (DFU) over UART, see
“LoRa® Technology Gateway Module Software
Specifications”
Operational
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 gateway 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)
• 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 modulation 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).
 2017 Microchip Technology Inc.
Preliminary
DS00000000A-page 1
LG8271/LG9271
Table of Contents
Device Overview ................................................................................................................................................................................... 3
General Specifications .......................................................................................................................................................................... 7
Typical Hardware Connections ............................................................................................................................................................11
Application Information ........................................................................................................................................................................ 13
Regulatory Approval ............................................................................................................................................................................ 15
Appendix A: Revision History .............................................................................................................................................................. 19
The Microchip Web Site ...................................................................................................................................................................... 21
Customer Change Notification Service ............................................................................................................................................... 21
Customer Support ............................................................................................................................................................................... 21
Product Identification System .............................................................................................................................................................. 22
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at docerrors@microchip.com. We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site; http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
using.
Customer Notification System
Register on our web site at www.microchip.com to receive the most current information on all of our products.
DS00000000A-page 2
Preliminary
 2017 Microchip Technology Inc.
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. When
combined with LoRa Technology transmission devices,
the LG8271/LG9271 can provide a system with
industry leading link budget, which makes it optimal for
applications requiring extended range and robustness.
The LG8271/LG9271 modules also contain an integrated output power amplifier (LNA) providing optimal
downlink signal levels.
FIGURE 1-2:
LoRa Technology modulation also provides significant
advantages in both blocking and selectivity compared
to the conventional modulation techniques, solving the
traditional design compromise between extended
range, interference immunity, and low-power
consumption.
The LG8271/LG9271 modules deliver exceptional RF
selectivity and their multi-channel performance make
them ideal for use in LoRa Technology gateway
applications.
Figure 1-1, Figure 1-2 and Figure 1-3 show the top and
bottom view, the pinout, and the block diagram of the
modules.
FIGURE 1-1:
TOP VIEW
PIN DIAGRAM
 2017 Microchip Technology Inc.
Preliminary
DS00000000A-page 3
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.
TABLE 1-1:
PIN DESCRIPTION
Pin
Symbol
Type
Description
NC
—
VDD
Power
Not Connected
HOST_INT
Output
Interrupt to the Host CPU
GND
Power
Ground Supply Terminal
PPS
Input
NC
—
Not Connected
NC
—
Not Connected
NC
—
Not Connected
Positive Supply Terminal
GPS PPS Input signal
GND
Power
10
NC
—
Ground Supply Terminal
Not Connected
11
NC
—
Not Connected
12
NC
—
Not Connected
13
NC
—
Not Connected
14
NC
—
Not Connected
15
GND
Power
16
NC
—
17
HOST_URX
Input
Module UART Receive
18
GND
Power
Ground Supply Terminal
19
HOST_UTX
Output
Module UART Transmit
20
RF_ENABLE
Input
21
GND
Power
22
RESET
Input
Reset Module
Not Connected
23
NC
—
24
VDD
Power
Ground Supply Terminal
Not Connected
RF Enable Input
Ground Supply Terminal
Positive Supply Terminal
25
NC
—
26
GND
Power
Ground Supply Terminal
27
GND
Power
Ground Supply Terminal
28
NC
—
DS00000000A-page 4
Preliminary
Not Connected
Not Connected
 2017 Microchip Technology Inc.
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
Power
Ground Supply Terminal
44
LED2
Output
LED2 Output
45
HOST_MISO
Ouput
Module SPI Slave Output
46
LED3
Output
LED3 Output
47
HOST_MISO
Input
48
PIC_DETECT
Input/Output
49
HOST_SS
Input
50
GND
Power
Ground Supply Terminal
51
HOST_SCK
Input
Module SPI Clock Input
52
VDD
Power
Positive Supply Terminal
 2017 Microchip Technology Inc.
Preliminary
Description
Ground Supply Terminal
Host USB DGround Supply Terminal
Host USB D+
Module SPI Slave Input
PCI Bus Detect Input.
Low = SPI Mode, High = mPCIe/UART
Module SPI Slave Select Input
DS00000000A-page 5
LG8271/LG9271
NOTES:
DS00000000A-page 6
Preliminary
 2017 Microchip Technology Inc.
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 870.000 MHz
Modulation Method
FSK (EU only), GFSK (EU only), and LoRa® Technology
modulation
Maximum Over-the-Air Data Rate
200 kbps (FSK);
21875 bps (LoRa Technology, see Table 2-4)(1)
RF Connection
On-board U.FL connector
Interface
UART (TTL)
Operation Range
Up to 15 km coverage at suburban; up to 5 km coverage at
urban area
RF TX Power - LG9271
Adjustable, < +18.5 dBm(2)
RF TX Power - LG8271
Adjustable, < +14.0 dBm(2)
Generated Conductive Harmonics Level
Below -70 dBm
Temperature (operating)
-40°C to +85°C
Temperature (storage)
-40°C to +115°C
Humidity
10% ~ 90% Non-condensing
Note 1:
2:
Depends on modulation and Expand Spreading Factor (SF)
TX power is adjustable. For more information, refer to the “LoRa® Technology Gateway Module Software
Specifications”
TABLE 2-2:
ELECTRICAL CHARACTERISTICS
Min.
Typ.
Max.
Units
Supply Voltage
Parameter
3.0
—
3.6
Voltage on any pin with respect to VSS (except
VDD)
-0.3
—
-VDD + 0.3
Voltage on VDD with respect to VSS
-0.3
—
3.9
Input Clamp Current (IIK) (VI < 0 or VI > VDD)
—
—
+/-20
mA
Output Camp Current (IOK) (VO < 0 or VO >
VDD)
—
—
+/-20
mA
GPIO sink/source current each
—
—
25/25
mA
Total GPIO sink/source current
—
—
200/185
mA
RAM Data Retention Voltage (in Sleep mode or
Reset state)
1.5
—
—
VDD Start Voltage to ensure internal Power-on
Reset signal
—
—
0.7
VDD Rise Rate to ensure internal Power-on
Reset signal
0.05
—
—
V/ms
Brown-out Reset Voltage
1.75
1.9
2.05
Logic Input Low Voltage
—
—
0.15 x VDD
Logic Input High Voltage
0.8 x VDD
—
—
0.1
50
nA
Input Leakage at <25°C (VSS
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Title                           : LoRaGateway_DS.book
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