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RFD21733 Schematic ( PDF Datasheet ) - RF Digital

Teilenummer RFD21733
Beschreibung Complete 2.4 GHz RF Transceiver Module
Hersteller RF Digital
Logo RF Digital Logo 




Gesamt 55 Seiten
RFD21733 Datasheet, Funktion
© 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






RFD21733 Datasheet, Funktion
© 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]
Differences Between Eval Boards
RFDP8
RFDANT RF Module
RFD21743 RFD21733
RFD21740 RFD21735
RFD21737
RFD21738
RFD21739
ETSI • CE Compliant
RFD21737
The RFD21733 RF Module with
built-in chip antenna is soldered
onto the RFD21737 eval board.
The antenna is self contained
within the module.
This eval board is self-contained
and does not require an external
antenna.
RFD21738
The RFD21735 RF Module is
soldered onto the RFD21738 eval
board. There is a 1.2 inch wire
antenna soldered onto the
RFD21738 which connects to the
RFD21735 external antenna pin
through RF strip-line within the PCB
layers.
This eval board is self-contained
and does not require an external
antenna.
RFD21739
The RFD21735 RF Module is
soldered onto the RFD21738 eval
board. There is a FEMALE SMA
connector soldered onto the
RFD21738 which allows the user
to connect to an external 2.4 GHz
antenna of their choice. The
RFD21735 external antenna pin is
routed to the SMA connector
through strip-line within the PCB
layers. This eval board requires a
user supplied 2.4 GHz antenna
with a MALE SMA connector.
ANTENNA NOT INCLUDED
6

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RFD21733 pdf, datenblatt
© 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
The LEARN / STATUS pin is bidirectional, it is an input when in the LEARN state and an output when in the
STATUS state, so you must drive it using a series resistor, we recommend you not use any value smaller 1k ohm
to limit the amount of load current. There is an internal 47k pull down resistor, so if you use a value of 1k series
resistor that will easily be enough to drive it high against the internal 47k pull down resistor.
Modules can learn up to 60 unique ESN’s. ESN’s cannot be deleted individually. The list of learned ESN’s can
be completely cleared by holding the LEARN signal high for at least 10 seconds and then releasing it. The
module will erase its ESN list, and then drive the LEARN signal in a fast alternating high/low pattern for a few
seconds to indicate that the ESN list is now empty.
Once a module has learned the ESN of another module, it will accept any and all data from that module only and
not any other modules. Up to 60 unique transmitters can be taught to one receiver. If a module is configured to
any of the 3 Network modes and it has not learned any transmitters ESN, then it will not receive and output any
data, until it learns at least one transmitter.
This network feature can be used for peer-to-peer networks, point to multi-point networks, multi-point to multi-
point networks. The association can be between two units for simple functions like opening a garage door or with
many units to form complex networks with multiple nodes.
Modes
Mode 0 – Active RFID Transmitter
Pin # Pin Label
13 +V
10 GND
16 Mode Select 0
17 Mode Select 1
3 Mode Select 2
4 TX LED
5 IN1
6 IN2
7 IN3
Direction
Input
Input
Input
Input
Input
Output
Input
Input
Input
Function
+V Power
Ground
Tie to GND
Tie to GND
Tie to GND
Toggles high during transmission (1 blink every 2 seconds)
Active high switch input #1 (optional) if not used, pull to GND.
Active high switch input #2 (optional) if not used, pull to GND.
Active high switch input #3 (optional) if not used, pull to GND.
The Active RFID Transmitter transmits a packet with its ESN every 2 seconds when the three inputs are all at a
low logic level. If any of the three inputs go high, the module transmits the state of all three inputs every 15 ms,
until all three inputs are low. The logic inputs should be tied low if they are not used in the end application.
The module is active during transmit for 15ms, but remains in an ultra-low power mode for the rest of the 2
second interval. The average power over time is measured in microamps, such that a CR2032 battery should
provide about 60 days of continuous use.
During the 15ms transmission times the current consumption is about 15mA and during the roughly 2 seconds the
current is about 2uA.
If you determine that you need a different period of transmission other then the 2 seconds, a shorter period or a
longer period, then simply use Mode 1 shown below and use your own controller to pulse one of the 3 inputs at
the desired period and it will perform exactly the same function as the RFID transmitter Mode 0.
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