Cattron IR LRM2 User manual

IR LRM2 Radio Module Introduction
Document p/n: 9S02-9027-A001 Rev.A
Product Development
IR LRM2 Radio Module
Document p/n: 9S02-9027-A001 Rev.A
CONFIDENTIALITY NOTICE
This correspondence and all information contained within are the exclusive, confidential and proprietary
property of Cattron North America Inc. it is not to be reproduced, nor is it or any portion of it to be used by
or disclosed to any other individual or legal entity, without the prior, written approval of Cattron North
America Inc. Furthermore, the information contained within this correspondence is also to be handled in
accordance with any and all confidentiality agreements between Cattron North America Inc. and the
receiver or user of this information.
.
©2020 Cattron North America Inc.

IR LRM2 Radio Module Introduction
Document p/n: 9S02-9027-A001 Rev.A
Revision History
Date
Revision
Description
Signature / Date
2020-03-10
A
Initial draft
Prepared
H. Lin
Verified
Approved
Prepared
Verified
Approved
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IR LRM2 Radio Module Introduction
Document p/n: 9S02-9027-A001 Rev.A
Table of Contents
1. INTRODUCTION ............................................................................................................................................1-4
1.1 PURPOSE..........................................................................................................................................................1-6
1.2 SCOPE..............................................................................................................................................................1-6
1.3 APPLICABILITY................................................................................................................................................1-6
1.4 DEFINITIONS,ACRONYMS ...............................................................................................................................1-6
1.4.1 Definitions ..............................................................................................................................................1-6
1.4.2 Acronyms................................................................................................................................................1-6
1.5 REFERENCES....................................................................................................................................................1-6
2. FEATURES SUMMARY.................................................................................................................................2-1
3. HOST INTERFACE DEFINITION................................................................................................................3-2
3.1 PINS ASSIGNMENT...........................................................................................................................................3-2
3.2 SIGNALS DESCRIPTION ....................................................................................................................................3-3
4. FUNCTIONAL DESCRIPTION.....................................................................................................................4-5
4.1 CONCEPTS OVERVIEW.....................................................................................................................................4-5
4.1.1 Block Diagram......................................................................................... Error! Bookmark not defined.
4.1.2 Data Communication Model & Definitions............................................................................................4-5
4.2 TELEGRAM TRANSMISSION..............................................................................................................................4-6
4.3 TELEGRAM RECEPTION ...................................................................................................................................4-6
5. IR LRM2 CONFIGURATION CONCEPT ...................................................................................................5-8
5.1 CONSOLE INTERFACE ......................................................................................................................................5-8
5.1.1 “Write” command...................................................................................................................................5-8
5.1.2 “Read” command....................................................................................................................................5-8
5.1.3 “Help” command ....................................................................................................................................5-8
5.2 STAND-ALONE TEST MODE.............................................................................................................................5-8

IR LRM2 Radio Module Introduction
Document p/n: 9S02-9027-A001 Rev.A
90275TRX module meets Part 15 of the FCC rules and regulations. Compliance with the labeling
requirements, FCC notices is required. In order to comply with FCC Certification requirements, the
Original Equipment Manufacturer (OEM) must fulfill the following requirements.
1. The system integrator must place an exterior label on the outside of the final product
housing the 90275 TRX Module. Thefigurebelow shows the contents that must be included
in this label.
2. 90275TRX modules may only be used with the antennas that have been tested and
approved for use with the module.
Labeling Requirements
The OEM must make sure that FCC labeling requirements are met. This includes a clearly visible
exterior label on the outside of the final product housing that displays the contents shown in
below.
WARNING: The 90275TRX modules have been tested by the FCC for use with other products without
further certification (as per FCC Section 2.1091). Changes or modifications to this device not
expressly approved by Cattron North America Inc. could void the user’s authority to operate the
equipment.
NOTICE: OEM’s must verify the final product complies with unintentional radiators (FCC Section
15.107 and 15.109) before providing a declaration of conformity for their final product to Part 15 of the
FCC Rules.
NOTICE: The 90275TRX modules have been certified for mobile and fixed radio applications. If the
module will be used for portable applications, the device must undergo SAR testing.
RF Exposure WARNING: This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with minimum distance 20
cm between the radiator and your body. This transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter.
NOTICE: The preceding statement must be included as a CAUTION statement in OEM product
manuals in order to alert users of FCC RF Exposure compliance.
90275TRX is designed for use in countless wireless applications requiring long range communications
with low energy consumption. To ensure that the final product complies with the all of the regulatory
requirements for the Modular Grant the following integration instructions should be followed.
90275TRX is limited to OEM installation ONLY. The OEM integrator is responsible for ensuring that
the end-user has no manual instructions to remove or install the module.

IR LRM2 Radio Module Introduction
Document p/n: 9S02-9027-A001 Rev.A
FCC Part 15.19 Warning Statement
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING
TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE
MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED
OPERATION.
FCC Part 15.21 Warning Statement
NOTE: THE GRANTEE IS NOT RESPONSIBLE FOR ANY CHANGES OR MODIFICATIONS NOT EXPRESSLY
APPROVED BY THE PARTY RESPONSIBLE FOR COMPLIANCE. SUCH MODIFICATIONS COULD VOID THE
USER’S AUTHORITY TO OPERATE THE EQUIPMENT.
FCC Part 15.105(b) Warning Statement- (ONLY Required for 15.109-JBP devices)
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in
a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
IC RSS-GEN, Sec 8.4 Warning Statement
ENGLISH:
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the
following two conditions: (1) this device may not cause interference, and (2) this device must accept any
interference, including interference that may cause undesired operation of the device.
FRENCH:
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de
brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.
Only the following authorized antennas or the antenna gain less than 2.0dBi may be used with the
equipment:
900MHz Splatch patch antenna (50 Ohm, -10dBi),
900MHz ¼ wave whip antenna (50 Ohm, 0dBi),
900MHz ½ wave whip Antenna FSP900/868 (50 Ohm, 2dBi);
2400MHz ½ wave dipole antenna (FW.24.SMA.M)

IR LRM2 Radio Module Introduction
Document p/n: 9S02-9027-A001 Rev.A
1. Introduction
1.1 Purpose
A new family of RF module, the LRM2 family, is being developed by Cattron North America Inc. This family is
employing Silicon Labs EFR32FG13 Flex Gecko SoC (System On Chip), which is including a high performance
Radio transceiver and a high performance Micro-Controller Unit.
1.2 Scope
This document describes the host interface signal definitions, timings, operation mode, available functionalities, and
provide details about its integration to Unity products. This document does not cover RF specifications or power
supply specifications.
1.3 Applicability
Applies to IR LRM2 family members, P/N 2PCA-9027-xxxx
1.4 Definitions, Acronyms
1.4.1 Definitions
1.4.2 Acronyms
IR LRM2
Radio Module
MCU
Machine Control Unit
SoC
System-On-Chip
OCU
Operator Control Unit
1.5 References
[1] “Schematic Drawing for LRM2”, Cattron P/N 9D02-9027-A001
[2] “Unity RF Telegrams Format”, Cattron P/N 9S01-7640-A101
[3] “LRM2 Radio Module –Configuration Registers Specifications”, Cattron P/N 9S02-8969-A002

IR LRM2 Radio Module Features Summary
Document p/n: 9S02-9027-A001 Rev.A
2. Features Summary
The IR LRM2 is designed to replace Remtron products with less cost and improved performance. Its host interface
is compatible with previous LRM(2PCA-7954-xxxx) series.
•Direct electrical compatibility to LRM (2PCA-7954-xxxx) interface
•On-board wireless SoC–The interface is controlled by an on-board Silicon Labs EFR32FG13 SoC. The
EFR32FG13 Flex Gecko SoC includes both a high-performance radio transceiver and a high performance, low
power Micro-Controller.
•Minimum buffers/Minimum Delay –IR LRM2 firmware is implemented to provide a “almost transparent”
operation; transmission and reception delays are kept to a minimum
•Support for different Modulation modes–The IR LRM2 family is designed to support multiple different RF
Modulations (2FSK and 4FSK), which is transparent to Host firmware.
These different aspects are covered in the rest of this document.

IR LRM2 Radio Module Host Interface Definition
Document p/n: 9S02-9027-A001 Rev.A
3. Host Interface Definition
3.1 Pins Assignment
Board to board connector Pin Details
J1
Pin number
Signal name
Pin number
Signal name
1
GND
2
GND
3
TDI-RF
4
nRESET-RF
5
MASTER-CTRL-US1-RX-M
6
RFIO-2-M
7
GND
8
MASTER-DATA-US0-TX-M
9
I2C0-SDA-RF
10
RFIO-3-M
11
I2C0-SCL-RF
12
TDO-RF
13
GND
14
MASTER-DATA-US0-RX-M
15
RFIO-1-M
16
TMS/SWDIO-RF
17
BOOT-EN/RFIO-0-M
18
TCK/SWDCLK-RF
19
GND
20
MASTER-CTRL-US1-TX-M
J5
Pin number
Signal name
Pin number
Signal name
1
GND
2
GND
3
nRESET-M
4
3.3V
5
nRESET-S
6
3.3V
7
BOOT-EN/RFIO-0-S
8
GND
9
SLAVE-DATA-US0-RX-S
10
REV_AN
11
SLAVE-CTRL-US1-RX-S
12
RFIO-1-S
13
SLAVE-DATA-US0-TX-S
14
ANT_SEL
15
SLAVE-CTRL-US1-TX-S
16
FWD_AN
17
READY
18
READY (For PA_EN)
19
GND
20
GND
Table 3.1 –Host Interface pins assignment

IR LRM2 Radio Module Host Interface Definition
Document p/n: 9S02-9027-A001 Rev.A
3.2 Signals Description
Net Name
General Description
TCK/SWDCLK-RF
GPIO (5V)
TMS/SWDIO-RF
GPIO (5V)
TDO-RF
GPIO (5V)
TDI-RF
GPIO (5V)
MASTER-DATA-US0-TX-M
GPIO (5V),UART_RX for Master data signals
MASTER-DATA-US0-RX-M
GPIO (5V), UART_TX for Master data signals
RFIO-2-M
GPIO (5V), RFIO-2_Master
RFIO-3-M
GPIO (5V), RFIO-3_Master
3.3V
Radio Power Supply
38.4MHz crystal Oscillator
High Frequency Crystal input, 38.4MHz crystal Oscillator
High Frequency Crystal output, 38.4MHz crystal Oscillator
nRESET-RF
Reset input, active low, nReset_Radio (Input from JTAG
connector)
Sub GHz RF Output
Sub GHz Differential RF output, positive path
Sub GHz Differential RF output, negative path
Sub GHz RF Input
Sub GHz Differential RF input, positive path
Sub GHz Differential RF input, negative path
GND
Radio Ground
GND
Power Amplifier (PA) voltage regulator VSS
GND
2.4 GHz Differential RF input/output, negative path
2G4RF_IOP
2.4 GHz Differential RF input/output, positive path
PAVDD
Power Amplifier (PA) voltage regulator VDD input
nRESET-M
nRESET_M (Reset output for Master controller)
nRESET-S
nRESET_S (Reset output for Slave controller)
BOOT-EN/RFIO-0-S
RFIO-0_Slave
SLAVE-DATA-US0-RX-S
UART_TX for slave data signals
SLAVE-DATA-US0-TX-S
UART_RX for slave data signals
SLAVE-CTRL-US1-RX-S
UART_TX for Slave control signals
SLAVE-CTRL-US1-TX-S
UART_RX for Slave control signals
TCXO_EN
GPIO for TCXO_EN
TX/nRX
GPIO (5V), TX/nRX (GPIO to enable RF switch#01 & 02)
READY
GPIO for GREEN LED.
Multiplexed with READY (GPIO output)
REV_AN
REV_AN
RFIO-1-S
RFIO-1_Slave
3.3V
Analog power supply
ANT_SEL
ANT_SEL (GPIO to enable RF switch#03 which will be located on
MCU board)
FWD_AN
GPIO for RED LED.
Multiplexed with FWD_AN (For power amplifier. It is not
required in our design. Just provision for cattron team)

IR LRM2 Radio Module Host Interface Definition
Document p/n: 9S02-9027-A001 Rev.A
GND
Voltage regulator VSS
NC
Kept it NC
3.3V
3.3V Supply
3.3V
3.3V Supply
GND with decoupling cap
Decouple output for on-chip voltage regulator
3.3V
3.3V Supply
BOOT-EN/RFIO-0-M
RFIO-1-M
RFIO-1_Master
I2C0-SCL-RF
I2C0_SCL
I2C0-SDA-RF
I2C0_SDA
MASTER-CTRL-US1-RX-M
UART_TX for Master control signals
MASTER-CTRL-US1-TX-M
UART_RX for Master control signals
Table 3.2 - Host Interface signals description

IR LRM2 Radio Module Functional Description
Document p/n: 9S02-9027-A001 Rev.A
4. Functional Description
4.1 Overview
4.1.1 IR LRM2 Radio
.
Figure 4.1 –IR LRM2 Design
The Silicon Labs ERF32FG13 SoC is located between the host interface and the RF interface, providing decoupling
between host and RF interface. The EFR32FG13 SoC has sufficient buffer space for one telegram.
As shown later, telegram processing is defined to minimize delays, so to provide a “transparent-like” behavior.
Sub-GHz will support different frequency bands to support different regions & supported frequency bands are
mentioned below:
•Propriety Sub-GHz protocol:
➢433MHz
➢460MHz
➢868MHz
➢915MHz
4.1.2 Data Communication Model & Definitions
The communication model defines some of the terminology used in the rest of this document.

IR LRM2 Radio Module Functional Description
Document p/n: 9S02-9027-A001 Rev.A
Host
LRM Radio Module
Host Data Buffer Tx/Rx
Transmit Telegram Frames
Receive Telegram Frames
RF packets
LRM Host Interface LRM RF Interface
Figure 4.2 - Data communication model
-The IR LRM2 Radio Module is used to communicate telegrams between hosts. In Unity context, hosts are
OCU and MCU CPU boards. The IR LRM2 has two interfaces: a Host Interface and a RF Interface.
-Transmit and Received Telegrams are relayed through the IR LRM2 Host Data Buffer. This buffer is
capable to hold only one telegram at a time. The purpose of this buffer is to relax host timings
requirements, and to allow decoupling between Host Interface and RF Interface data rates.
-Telegrams sent/received on the Host Interface and RF interface are encapsulated into frames to improve
synchronization.
-The IR LRM2 does not perform any processing on the telegrams content; it controls only the frames
overhead.
4.2 Telegram Transmission
Transmit frames have two fields:
-Telegram length (number of bytes). The length is used by the CPU to control the transmission process.
-Telegram (maximum 254 bytes). The content of the telegram is defined by the application. For Unity
application, this is the Unity Telegram beginning with the Scrambling byte, the TID and terminated with the
16bits CRC, as defined in ref [2].
Length
1 byte Telegram “Length” bytes
Figure 4.3 - Transmit Telegram frame format
4.3 Telegram Reception
Each RF packet received by the LRM2 is sent to the host interface, followed by its RSSI. Also, in order to ensure
receive telegram frame synchronization (i.e. unambiguous detection of the start of the frame), the frame is
encapsulated according to SLIP framing. SLIP framing is very simple to decode. It is described in section Error!
Reference source not found..
Receive frame fields are:
-SOF (Start-of-Frame character). This is part of SLIP encapsulation.
-Length of the Telegram field (number of bytes), not counting RSSI fields and any additional control characters
introduced for SLIP encapsulation.
-Telegram (maximum 254 bytes). The content of the telegram is defined by the application.

IR LRM2 Radio Module Functional Description
Document p/n: 9S02-9027-A001 Rev.A
-RSSI: Received signal strength for this frame. RSSI is an 8 bits integer value, expressed in dBm. Range;-128 to
+127 dBm.
Length
1 byte Telegram “Length” bytes RSSISOF
1 byte 1 byte
Figure 4.4 - Receive Telegram frame format

IR LRM2 Radio Module IR LRM2 Configuration Concept
Document p/n: 9S02-9027-A001 Rev.A
5. IR LRM2 Configuration Concept
All IR LRM2 configuration and status parameters are accessible through addressable registers.
-All parameters can be read and written only in CONFIG mode.
The definition of the configuration registers is given in reference [3]. This section addresses the basic description of
all these three methods.
5.1 Console Interface
The Sub-GHz serial interface configuration port is enabled by asserting !CONFIG signal; the serial interface is
automatically reconfigured in asynchronous mode, running at 38400bps, 8N1. All ASCII strings received are
interpreted as configuration commands. This mode is particularly useful for stand-alone testing, when the unit can
be controlled from a PC or by an operator/tester using a terminal emulation program.
5.1.1 “Write” command
wrCmd register value , where:
wrCmd = write command. “w”or “wr”can be used and are equivalent
register = register identification. Can use the register name or register address
value = value to be written, in decimal or hexadecimal format. Hexadecimal values are preceded by ‘0x’
5.1.2 “Read” command
rdCmd reg where:
rdCmd= read command. ror rd can be used and are equivalent
reg = register identification. Can use the register name or register address
5.1.3 “Help” command
helpCmd where:
helpCmd= help command. h, help or ?can be used and are equivalent.
The IR LRM2 responds with the list off all available configuration registers.
5.2 Stand-Alone Test Mode
The IR LRM2 can be operated in stand-alone mode for production/service tests. In this case, only a 3.3VDC supply
is needed, and a RS232/TTL transceiver (like Cattron FLASHBOX) to connect to a PC serial port.

IR LRM2 Radio Module IR LRM2 Configuration Concept
Document p/n: 9S02-9027-A001 Rev.A
21
LRM, host interface
26
RXD
TXD
25
!CONFIG
3V3
GND
27
22
RS232 - TTL transceiver
(ex: Cattron FLASHBOX)
3.3VDC
RS232
PC, running automated test
program, or ANSI terminal
emulation software
*Note: The LRM !RX_EN, !TX_EN and !RESET all have internal pull-ups, so they can be left unconnected.
Figure 5.1 - LRM2 connection for stand-alone operation
The IR LRM2 will support several built-in test modes to ease testing from a PC. For example
a. Sub-GHz Transmission Tests
- Generation of different type of carrier: unmodulated (CW), or modulated with “101010..” or pseudo-random
sequence
- Automatic generation of test RF frames with predefined content
b. Sub-GHz Reception Tests
- Measure PER (packet error rate) when receiving the predefined test RF frames
- Measure RF input level
c. Bluetooth Tests
- By using Silicon Labs application, “Wireless Gecko”, the Bluetooth channel, transmit power level, data speed
could be adjusted.