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PDF RFD21739 Data sheet ( Hoja de datos )
| Número de pieza | RFD21739 | |
| Descripción | Complete 2.4 GHz RF Transceiver Module | |
| Fabricantes | RF Digital | |
| Logotipo |  |
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© Copyright,
RF Digital Corp.
8/26/2010 11:56 PM
Patents Pending
RoHS
RFD21733
FCC APPROVED
13715 Alton Pkwy • Irvine • CA • 92618
Tel: 949.610.0008 • Fax: 949.610.0009
www.rfdigital.com • [email protected]
RFDP8
RFDANT RF Module
RFD21743 RFD21733
RFD21740 RFD21735
RFD21737
RFD21738
RFD21739
ETSI • CE Compliant
Complete 2.4 GHz RF Transceiver Module
with Built-In RFDP8 Application Protocol
Part Numbers RFD21733, RFD21735, RFD21737, RFD21738, RFD21739
Optional Configuration
RFD21733 FCC APPROVED
15mm x 15mm (0.600 inch x 0.600 inch)
RFD21733 / RFD21735 is a complete, READY-TO-USE wireless solution with it's
built-in user application interface (RFDP8). Includes RFID, ESN, Logic Switch
Transmitter / Receiver, 9600,N,8,1 Serial UART and many easy-to-use addressable
network modes. No development required at all, no RF layout, no code writing, all
features are built-in. Be up and running with a full wireless solution in minutes.
For use with
External Antenna
RFD21735
Applications
• Active RFID
• Long Range RFID
• Remote Control
• Light Controls
• Home Automation
• Alarm Security
• Keyless Entry
• Perimeter Monitoring
• PC Keyboard Security
• Wireless Keyboard
• Wireless Mouse
• TV Remote
• Home Stereo Remote
• Asset Tracking
• Wireless PTT
• Remote Switches
• Remote Terminals
• Wireless RS232 DB9
• Wireless RS485
• Temperature Control
• HV/AC
• Meter Reading
• Data Acquisition
• Inventory Control
• Keyfob Remotes
• Industrial Controls
• Vending Machines
1
1 page  
© Copyright,
RF Digital Corp.
8/26/2010 11:56 PM
Patents Pending
RoHS
RFD21733
FCC APPROVED
13715 Alton Pkwy • Irvine • CA • 92618
Tel: 949.610.0008 • Fax: 949.610.0009
www.rfdigital.com • [email protected]
RFDP8
RFDANT RF Module
RFD21743 RFD21733
RFD21740 RFD21735
RFD21737
RFD21738
RFD21739
ETSI • CE Compliant
RFD21733 / RFD21735 Application Configuration Examples
5
5 Page 
© Copyright,
RF Digital Corp.
8/26/2010 11:56 PM
Patents Pending
RoHS
RFD21733
FCC APPROVED
13715 Alton Pkwy • Irvine • CA • 92618
Tel: 949.610.0008 • Fax: 949.610.0009
www.rfdigital.com • [email protected]
RFDP8
RFDANT RF Module
RFD21743 RFD21733
RFD21740 RFD21735
RFD21737
RFD21738
RFD21739
ETSI • CE Compliant
noise which is common in nearly all environments today. It is especially effective and can easily coexist in heavy
WiFi environments, which very few technologies can do successfully without the need of excessive processing
power. The protocol strategically changes channels frequently to deliver its payload to the destination device
reliably, yet not too excessively as to demand too much internal processing power which allows it to run with a
very low current consumption profile and fast start up times allowing substantial flexibility with implementation.
The RFDP8 protocol reduces the amount of on-air traffic and unnecessary chatter due to its unique and highly
efficient design, which does not require bilateral registration and association as do many other technologies
today. The RFDP8 does not require ack-nacks to complete a packet delivery, it's unique technique of packet
delivery, recovery and correction allows it to work as a one-way link, hence drastically simplifying users'
applications which always results in more a robust wireless system. The RFDP8 protocol combined with RF
Digital's leading-edge RF Module hardware delivers a highly robust method of delivering user data from point to
point, point to multi-point or multi-point to multi-point, transmitter-receiver, transceiver, serial or switch on/off data
modes. The protocol is designed to work seamlessly with RF Digital's hardware modules, the combination results
in ultra long range at ultra low currents without concern for compliance approvals since modules such as the
RFD21733 come with FCC approval for USA and have passed CE - ETSI emission testing for European
requirements. The RFDP8 protocol adds several dB of range gain passively through it's advanced data recovery
technique which pulls valid data out of a noisy environment adding effective gain which results in more range,
delivering the net result, which is a very robust wireless system. All of this is built into the overhead of the RFDP8
protocol and RF Digital modules, so it's all done behind the scenes, allowing the user to focus on building their
application and simply putting data into the radio device as a wireless pipe and easily receiving it on the other
end.
Electronic Serial Number
Every RF Digital Module has its own 32-bit unique identifier (over 4 billion unique values), known as the Electronic
Serial Number, or ESN. This value is assigned at the factory and cannot be changed by the user.
The ESN is included in every packet that is transmitted, as part of the protocol overhead and is transparent to the
user.
The user does not ordinarily need to know what the ESN is. However, in certain cases it is helpful to know the
serial number, and so a mechanism has been provided to read out the ESN. This method is documented in the
UART section below.
Network Mode
The UART and the Receiver with logic output can be configured to accept data only from transmitters with which it
has been associated, i.e. in its network.
When in network mode, a module must “learn” the ESN of any module which it wishes to “hear." The LEARN
signal (listed in the UART and receiver sections below) is usually an input, pulled to GND through an external
resistor. When LEARN is driven high for at least 20ms and then allowed to return to GND, the module enters
learning mode.
While in learning mode, the LEARN signal is changed to an output and driven high. During this time, the module
will learn the ESN of the first module that sends any data; the data will be discarded, the ESN of the transmitting
module will be learned by the receiving module. The receiving module indicates that it has learned the ESN by
toggling the LEARN output on and off quickly three times.
After learning the transmitting modules ESN, or after 10 seconds pass, the module will exit learning mode by
driving LEARN low and then changing it back to an input.
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RFD21739.PDF ] | |
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