Cervis MRF450 Manuel utilisateur
2014 Cervis, Inc.
MRF450 User Manual
U077.0.2-MRF450
™
Module RF450
This document is the property of Cervis, Inc. and cannot be copied, modified, e-mailed, or reproduced
without the express prior written consent of Cervis, Inc.
Cervis, Inc. reserves the right to change this manual or edit, delete, or modify any information without prior
notification.
Operation of this module in Periodic Transmit mode requires a license.
FCC Statements
15.19 – Two Part Warning
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.
15.21 – Unauthorized Modification
NOTICE: The manufacturer is not responsible for any unauthorized modifications to this equipment made by the user. Such modifications could void the
user’s authority to operate the equipment.
15.27 – Special Accessories
This device is supplied with special accessories that include an RF adapter cable and antenna. These special accessories must be used with the device. It is
the responsibility of the user to use the needed special accessories supplied with the equipment.
15.105(b) – Note:
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Industry Canada Statements
RSS-GEN 7.1.2 – Transmitter Antenna / Antenne de L'émetteur
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the
transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent
isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou
inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il
faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à
l'établissement d'une communication satisfaisante.
This radio transmitter 7955A-MRF450 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. Antenna types not included in this list, having a gain greater than the maximum gain
indicated for that type, are strictly prohibited for use with this device.
Le présent émetteur radio 7955A-MRF450 a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés ci-dessous et ayant un
gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au
gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.
Approved Antenna List / Liste Antenne Approuvé
Manufacturer Part Number Gain Impedance
Nearson L324TR-440 0 dBi 50 Ohm
RSS-GEN 7.1.3 – Notice / Délai
This device complies with Industry Canada licence-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.
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.
User Manual
2014 Cervis, Inc. i
Table of Contents
Table of Contents.......................................................................................................................... i
List of Figures ............................................................................................................................... i
List of Tables................................................................................................................................. i
Cervis Inc. Safety Precautions ................................................................................................... 1
1.0Introduction.......................................................................................................................... 2
1.1Features............................................................................................................................. 2
1.2Dimensions (mils)/Locations........................................................................................... 3
1.3Pinout................................................................................................................................. 3
2.0Installation............................................................................................................................ 4
3.0Tune-up Procedure.............................................................................................................. 4
4.0Electrical Characteristics.................................................................................................... 5
4.1Power ................................................................................................................................. 5
4.2SPI Mode............................................................................................................................ 5
4.3UART Mode........................................................................................................................ 5
5.0RF Characteristics ............................................................................................................... 6
6.0Operational Modes............................................................................................................... 7
6.1Push-To-Transmit Mode................................................................................................... 7
6.2Periodic Transmit Mode................................................................................................... 7
7.0Communication Protocol .................................................................................................... 8
7.1SPI ...................................................................................................................................... 8
7.2UART.................................................................................................................................. 8
7.3Acknowledgement............................................................................................................ 9
8.0Messages............................................................................................................................ 10
8.1Get / Set Parameter......................................................................................................... 10
8.2Transmit........................................................................................................................... 12
8.3Receive ............................................................................................................................ 13
8.4Error................................................................................................................................. 14
List of Figures
Figure 1. MRF450 Front and Back................................................................................................2
Figure 2. Dimensions (mils)/Locations........................................................................................3
Figure 3. State Transitions vs. Current Consumption................................................................5
List of Tables
Table 1. P1, P2, and P3 Pinout......................................................................................................3
Table 2. Recommended Baud Rates and Associated Deviation...............................................6
Table 3. OTA Structure Format.....................................................................................................6
Table 4. Packet Format Diagram...................................................................................................8
Table 5. Message IDs and Structures ........................................................................................10
Table 6. Parameter ID Assignment and Data Lengths .............................................................10
Table 7. Configurable Parameters..............................................................................................10
Table 8. Transmit ID, Reply.........................................................................................................12
Module RF450
U077.0.2-MRF450
ii
Table 9. Receive Message Structure ......................................................................................... 13
Table 10. Error Message Structure ............................................................................................ 14
User Manual
2014 Cervis, Inc. iii
Notes and Observations
User Manual
Cervis Inc. Safety Precautions
Read and follow all instructions.
Failure to abide by Safety Precautions may result in equipment failure, loss of
authority to operate the equipment, and personal injury.
Use and maintain proper wiring. Follow equipment manufacturer instructions.
Improper, loose, and frayed wiring can cause system failure, equipment damage, and
intermittent operation.
Changes or modifications made to equipment not expressly approved by the
manufacturer will void the warranty.
Owner/operators of the equipment must abide by all applicable Federal, State, and
Local laws concerning installation and operation of the equipment. Failure to comply
could result in penalties and could void user authority to operate the equipment.
Make sure that the machinery and surrounding area is clear before operating. Do not
activate a remote control system until certain that it is safe to do so.
Turn off the module power before attempting any maintenance. This will prevent
accidental operation of the controlled machinery.
Do not allow liquid to enter the module enclosure. Do not use high pressure
equipment to clean the module.
Operate and store units only within the specified operation and storage temperatures
defined in the Specifications of this document.
Module RF450
U077.0.2-MRF450
2
1.0 Introduction
The MRF450 radio module is an RF modem. The module consists of a Silicon Labs RF
transceiver coupled with a 32-bit Atmel ARM processor. The module is intended to be
integrated into Cervis product, providing RF connectivity while hiding the complexity of RF
communications and link management.
The radio is designed to operate in the 450 – 470 MHz band with a maximum output power of
less than 15 dBm. The radio can operate on any center frequency in the band with a resolution
of 1 kHz. The center frequency is fixed for the duration of operation. The radio utilizes 2(G)FSK
modulation in a 12.5 kHz channel bandwidth.
1.1 Features
FCC Part 90.217 Certified 12 kbps Data Rate
12.5 kHz Selectable Channel SPI or UART Communications
450–470MHz Operation Simple Packet-Based Protocol
Up to 14dBm Output Power Status LEDs
Figure 1. MRF450 Front and Back
User Manual
2014 Cervis, Inc. 3
1.2 Dimensions (mils)/Locations
Figure 2. Dimensions (mils)/Locations
1.3 Pinout
Table 1. P1, P2, and P3 Pinout
P1
Pin Assignment I/0 P3
Pin
A
ssignment I/0
P1.1 +VDC 3.3V P1.1 +VDC 3.3V
P1.2 -VDC GND P1.2 TMS IN
P1.3 Enable IN, High P1.3 -VDC GND
P1.4 OC Flag OUT, Low P1.4 TCK IN
P1.5 SPI SCK IN P1.5 -VDC GND
P1.6 SPI SDI / UART RX IN P1.6 TDO OUT
P1.7 SPI SDO / UART TX OUT P1.7 NC NC
P1.8 SPI nSS IN, Low P1.8 TDI IN
P1.9 F0 IN/OUT P1.9 -VDC GND
P1.10 F1 / nRESET IN/OUT P1.10 nRESET IN, Low
P1
Pin Assignment I/0
P1.1 Debug RS232 TX OUT
P1.2 Debug RS232 RX IN
P1.3 REF GND
Module RF450
U077.0.2-MRF450
4
2.0 Installation
When integrating this module into a host, the user must provide all text in the “FCC Statements”
and “Industry Canada Statements” into the host device’s user manual (see Forward Material).
The text must not be modified in any way and presented in a conspicuous manner that the end
user can be reasonably expected to access.
The module is provided with an RF adapter cable and antenna. The RF adapter cable converts
MCX to RP-TNC plug. The connector on the antenna is an RP-TNC jack. Please see section
entitled “FCC Statements” for notice concerning these special accessories.
Install the RF adapter cable by plugging the MCX plug into the MCX jack on the module (RFE2).
Affix the RP-TNC end of the adapter cable to the housing of the host device utilizing the keyed
housing and locking nut. Finally, install the antenna onto the RP-TNC end of the adapter.
3.0 Tune-up Procedure
This module does not require any special tune-up procedure by the user. This module utilizes
advanced system-on-chip (SOC) technology. The SOC is tuned by the foundry at time of
manufacture and is not subject to change or adjustment. The module contains no adjustable
components.
Proper RF operation of the module is verified during the manufacturing process using suitable
equipment and methods. The manufacturer has performed a tuning process according to the
SOC design guidelines.
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