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RFDP8 Manual

1. o a AAA 1 3 Imput Switch Logic Transmitter O 0 1 IN3 I N2 N1 TXLED 2 Serial UART Transceiver 9600 N 8 1 0 1 TXDIN RXpouT tocc O x 3 Serial UART Transceiver 9600 N 8 1 0 1 1 TXDIN RXD OUT LOGICI O ESN LEARN Network 4 3 Output Switch Logic Receiver 500ms 1 o o OUT3 OUT2 OUT1 x J 5 3 Output Switch Logic Receiver 500ms 1 0 1 OUT3 OUT2 OUT1 ESNLEARN Network 6 3 Output Switch Logic Receiver 20ms 1 1 0 OUT3 OUT2 OUT1 X J 7 3 Output Switch Logic Receiver 20ms 1 1 1 OUT3 OUT2 OUT1 ESNLEARN Network Module RFD21733 RFD21735 Pin Number 3 17 16 7 6 5S L_RFDANT RFD21742 RFD21743 Pin Number 7 6 5 11 10 9 4 8 jj Free Applications Support Email your application questions to support rfdigital com 6 Copyright RF Digital Y REDPS amp RFDP8 nb ie iis DIG ITAL RF Module RFDANT RFD21733 RFD21742 RoHS CE ESTI E RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Choosing between RFD21733 Module or RFD21743 RFDANT The RFD21733 RF Module and the RFD21742 RFD21743 RFDANTs have the same electrical interface and ar
2. Copyright RF Digital REDPS REDPS DIGITAL rroa NN we eee RFD21733 RFD21742 RoHS CE ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Compliance Approved 2 4 GHz RF Transceiver Modules with Built In RFDP8 Application Protocol Complete Compliance Approved amp Certified READY TO USE 2 4 GHz wireless solution with built in RFDP8 interference tolerant user application protocol Includes RFID 32 Bit ESN Logic Switch Transmitter Receiver 9600 8N1 Serial UART Transceiver 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 wireless solution in minutes RFD21733 IC amp FCC APPROVED Optional Configuration CE ESTI TESTED amp COMPLIANT Easy to solder 0 050 Inch SMT pads Em CE ESTI For use with any External Antenna 15mm x 15mm 0 600 x 0 600 Inch KEYFOBs amp RFID IC FCC APPROVED CE ETSI Compliant Standard amp Custom CE ESTI TESTED amp COMPLIANT Complete RADIO INSIDE Antenna C CC db D RFD ANT ANNE REC LLL CoM Use any plastic or metal enclosure No Need for RF cables Only 3V GND Data 1 5mm 11pin Connector Fits onto any PCB SMT or Through Hole
3. Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Keep Out Area Example 1 When placing the module info a plastic enclosure it is highly recommended that you locate the module in the corner of the enclosure PCB so it will be as far away from your other components on the PCB and as close to free airspace as possible In addition you want to locate the module in a position in your product where it will have as much free airspace as possible near the antenna when in use For example if it will be placed against a wall it is preferred to locate the module so it will be in a location in your product where it will be on the side of the product where it will be further away from the wall rather then directly next to it so the RF signal can have as much free airspace to give you the best range performance possible Note If you plan on using a metal enclosure you can not locate the module inside of the enclosure or it will have very limited range for metal enclosures we recommend the RFD21743 which is specifically suited for that The electrical ground connection to t
4. the modules Potting Encapsulation and Conformal Coating Do NOT pot or conformal coat the RFD21733 or RFD21735 If you plan on encapsulating the RFD21733 or RFD21735 in a potting compound or conformal coating you must assure that the compound in liquid or solid form does not enter under the shield where there are sensitive RF components Some of the capacitive values are as low as half a picofarad and sensitive to contacting materials such as potting compounds There are potting compounds and conformal coatings which have very good dielectric constants and are suitable for 2 4 GHz potting applications however when you apply any of these they were accounted for in the circuit design and might reduce performance of the device or all together cause it not to function Applying any compound conformal coating or potting directly to the module voids any and all warranty and support service If your application requires 100 sealing of the module there is a way to do this very successfully without impacting the module performance Simply place the module on your PCB Place a plastic cover over the module like a hat make the cover large enough to cover the whole module Apply glue around the bottom perimeter of the cover where it sits on the PCB This allows the module to function in free airspace while there is a complete seal around it This information is only for reference and you should do your own testing with your application to fin
5. Mu run aa EE ohm pull down for about 1mS after reset or after power up Inside of Modules and RFDANTs 8 Mode Select2 inp A k pull down mounted on Eval Board 9 TX LED Status Learn Input Output 47k pull down mounted on Eval Board Free Schematic Layout and Application Design Reviews For free Application Schematic and Layout design reviews send color screen captures or PDFs of your schematic and layout to support rfdigital com RF Digital s Support and Application Engineers are ready to get your wireless application running today Why spend lots of time reading volumes of data Instead simply send your application questions to support rfdigital com and receive direct fast and personal answers focused on your specific project and needs We look forward to hearing from you Mode 0 Active RFID Transmitter Pin Pin 13 6 17 ModeSelectt impt TietoGND O o O T 3 ModeSelet2 input 8 4 IXLED jOutput Toggles high during transmission 1 blink every 2 seconds DU amp high switch input 1 optional if not used pull to GND 1 re PR Go high switch input 2 optional if not used pull to GND AAA high switch input 3 optional if not used pull to GND Free Applications Support Email your application questions to support rfdigital com 30 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL ev rroa O R A T I O N
6. Patents Pending RFD21733 RFD21742 RoHS CE e ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs The Active RFID Transmitter transmits a packet with its ESN every 2 seconds when the three inputs IN1 IN2 IN3 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 If you wish to have longer usage you can contact support rfdigital com for intervals greater then 2 seconds for example 20 seconds would estimate to about two years During the 15ms transmission times the current consumption is about 15mA and during the roughly 2 seconds the current is about 2uA The average current with a 2 second interval is about 120uA The average current with a 30 second interval is about 10uA and 60 second interval is about GuA Estimated runtime of many years can be achieved 30 second range due to the very low average current consum
7. Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDANT EXCELLENT ANTENNA PATTERNS M agg 30 29 28 Vertical Antenna Pattern Free Applications Support Email your application questions to support rfdigital com RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFDANT RFD21742 and RFD21743 high performance antenna patterns are easily achieved without any RF considerations or knowledge because the 11 pin cable and connector only carries power and data signals so NO RF cable loss at all RF Digital s Patent Pending RFDANT design is the only device in industry which can achieve this outstanding performance 11 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFD21772 amp RFD21773 Eval Boards for RFDANT RFD21772 RFD21773 Eval board with RFDANT 11 pin connector RFD21772 Eval Board for RFD21742 RFDANT When ordering part number RFD21772 you receive an RFDANT eval board pictured below AND you also receive an RFD2142 RFDANT For Eval board usage i
8. Patents Pending Free Applications Support Email your application questions to support rfdigital com 1 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified EF DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com KEYFOBs RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 The RFD21733 Module with its RFID interval factory set to 30 seconds is inside of a KEYFOB enclosure with a CR2032 battery The reference layout for this device is available through support rfdigital com if you want to build it yourself However if you wish to purchase the ready made KEYFOBs from RF Digital they are available part numbers shown below There are two modes of use one is in Active RFID mode were the KEYFOB automatically transmits its ESN once every 30 seconds The other mode of use is SWITCH transmitter which is available in 1 2 or 3 buttons The RFID versions also have 1 2 or 3 buttons so they serve as an automatic RFID transmitter and in addition have the switch buttons in one KEYFOB If you do not need the automatic Active RFID feature just use the Switch Button KEYFOBs RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21783 RFD21793 OF 3 Button Switch Keyfob 3 Button RFID Keyfob Pressing button 1 2 or 3 will cause the out
9. apply a high logic level to the LOGIC IO pin and it will start transmitting without the need for sending serial data into the TXD pin Once it is transmitting any mode 2 or mode 3 receiver s LOGIC IO pin will go high for the same duration of time This allows you to send switch data between two transceivers as well as serial data In some applications this is very useful since you can use this feature to have one master device turn on a slave device and wait for the slave device to be ready to communicate using the UART and then begin sending data to it rather than keeping it awake all the time Bi Directional LOGIC IO Operation In Mode 2 and Mode 3 UART mode includes an additional bi directional general purpose IO line The IO signal is generally an input and should be pulled to GND with an appropriately sized resistor for example 10k If the IO signal is driven high the module will transmit this information and any UART which receives the data will turn its IO signal into an output and drive it high This will continue until 20ms pass without receiving any new data or until the module receives a packet which indicates that the IO signal should be driven low and turned back to an input The state of the IO signal does not require any extra data in the radio stream and so is free in the packet overhead When the module is driving its IO signal high it will periodically change the pin to an input and check to see if it remains high before
10. I ELLE ECLLDO AN an rein YEY Shihan WS HELL wnt MERA MAA X 1 EXT Li RFEITTXl 21TAa2 21734 ANTENNA AREA MO COPPER OH ANY RFDEM 24732 20731 SOU NO COPPER ON ANY es LAYER IN THIS AREA LAYER IN THIS AREA Maam ma 17 7 CEJA I Is 3 Eg EE EES TE 3 E z E 3 RFD21723 33722 1 21721 Tex NO COPPER OM ANY LATER IH THIS AREA arona ANTENNA AREA mocoPPER ON ANY n LAYER IM THIBAREA 1 1 i Ge RFOHTIJ i ANT HTH J ET rh aroma RTI Al NHA AREA i NO CORPER ON ANT aromas TL HT A i CX uve Tus ance SR ANTENNA AREA WO COPPER ON ANY meen LAYER IN THIBAREA CEA 1 INCH LENGTH Free Applications Support Email your application questions to support rfdigital com 72 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 14 The gray area shows where to keep free from copper and components These are multi module configurations Typical layouts for diversity applications where you will use multiple receivers transmitte
11. NO Qe Modules 1 8 3 12 7 45 7 REF j 7 Tray Stack Height i 322 6 REF 90 modules per tray x 6 stack 540 modules Free Applications Support Email your application questions to support rfdigital com 94 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending Au Nd 13715 Alton Pk Irvi CA 92618 RFD21733 FCC IC eye vee eee RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFDP8 RFDP8 RF Module RFDANT RFD21733 RFD21742 RFD21735 RFD21743 322 6 REF 319 8x No Holes Vacuum Pickup Cell EHEHEBEHESEHEHEHESEHEHEHEE ZEE EE al nia ala aia a a ata AE TEE niaaa ala a a a a a a a a a a aia aia aia Chamfer Indicates Package PIN 1 Orientation aa E 34 3 25 4 DETAIL A SCALE 1 1 Free Applications Support Email your application questions to support rfdigital com 55 Copyright RF Digital DE DPS 7 10 2011 1 40 AM DIGITAI Ande Patents Pending ifs a RoHS CE ESTI RFD21735 SEE Um 13715 Alton Pkwy Irvine CA 92618 coo ee RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 Approved amp Certified Fast Answers support rfdigital com RFD21739 RFD21733 RFD21735 Tray Packaging 7 Trays total including 1 blank top tray 90 modules per tray x 6 stack 540 modules Top Tray used f
12. between UART and Switch Logic Receiver Transmitter The Logic Receiver and Transmitter modes are able to communicate with a module operating in one of the UART modes which opens up a wide range of possible applications involving PC s or embedded systems with serial communications capability Logic Transmitter to UART A Logic Transmitter whether RFID or not sends the state of its inputs as a single byte of data followed by its ESN as four bytes A Mode 2 or Mode 3 Module or RFDANT in Serial UART can receive this packet and output it as a binary stream to a PC serial port or an embedded microcontroller The format of the data is Free Applications Support Email your application questions to support rfdigital com 39 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL evo roar O R A T i O N eri RFD21733 RFD21742 Un Gn 13715 Alton Pkwy Irvine CA 92618 iieri MB dts RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Byte Bit7 Bit6 Bits Bit4 Bits Bit2 Bit1 Bito 1 Input 3 Input 2 Input 1 RFID RFID ESN Byte 1 ESN Byte 2 In the first byte bits 6 through 4 carry the state of the logic inputs with a 1 indicating the logic input on the transmitter is high and a O indicating it is low An RFID Transmitter will set both bits O and 4 to indicate that it is a periodic transm
13. changing it back to an output This causes a periodic dip in the signal 1ms every 12 16ms and so any circuitry which relies on a steady state output from the IO signal should include conditioning for example a retriggerable one shot with a hold time of 2ms to avoid adverse effects Note even if there is no data inputted into the TXD line and the TXD line is pulled high or low through a resistor and kept at a steady state simply applying a high on the LOGIC IO pin will cause that radio to start transmitting and stay transmitting as long as the LOGIC IO pin is kept high This is a huge advantage if you want to use it to reset a remote device for example or use it to turn on an external device located at the receiving radio all without the need of doing decoding of data on the receiving end to process the command signal Also another very powerful feature of this function is to use it to pass command signals to the receiving radio without needing to use escape codes hidden within the data stream which can always cause problems this LOGIC IO feature with the RFDP8 protocol completely resolves this long time industry problem with UART escape codes with wireless devices IMPORTANT NOTE LOGIC IO Pin This pin is BI DIRECTIONAL The LOGIC IO pin MUST be terminated when in mode 2 or 3 pulled to ground with a 47k resistor or it will float and cause the transmitter unintentionally All inputs must be terminated properly and this one is no exception If
14. data inputted into its TXD pin of its UART into packets which are transmitted over the air The firmware transmits a packet when it has buffered 12 bytes of data or 15ms after receiving a byte of data which ever comes first On the receiving end data will be outputted on the RXD pin of the UART at line speed with no pauses between the bytes other than the UART start and stop bits The RFDP8 protocol can run at full speed line rate meaning without any spaces at all Of course you can space out your bytes at any pace you like however as many bytes as you input into the TXD pin during each 15mS period will be collected into one packet and sent at one time to the receiving radio and outputted in one burst at full line rate The buffering and latency may cause problems with certain microcontrollers that can not tolerate serial data into their UART in a constant stream at 9600 8N1 One possible solution is to add a 16ms delay on the transmitting side which will cause each byte to be sent in its own packet by the module and therefore on the receiving end the bytes will be outputted at a pace of one byte every 16ms which will help your controller of choice handle the fast UART data As an example consider a scenario where one system is sending a byte of data every 8ms When module 1 receives the 1 byte on its UART the 15ms timer begins The ge byte arrives before 15ms elapses and so the first two bytes are sent in a single packet over the air to Modul
15. internal pull ups or pull downs on any other pins except for Mode Select 0 which has an internal 13k pull down temporarily applied when the device comes out of reset or after power up for about less then a millisecond All other pull downs or pull ups must be applied by you externally to the Module or RFDANT If you are using the RFD Eval Boards RFD21737 RFD21738 RFD21739 RFD21772 RFD21773 there are 47k pull downs on these Eval Boards see the Eval Board Schematic for reference on Pull Downs and which Pins they on Always send screen captures of your schematics and layouts to support rfdigital com for review Mode 2 9600 baud UART Serial Transceiver Pin Pin 2 18 w 1 10 END 5 16 Mode Select 0 17 Mode Select 3 Mode Select 2 4 Not Used Logic lO I O Bidirectional switch logic I O if not used then must be pulled to ground through a 47k resistor Also must have series a 6 RXD Output RX Data Out UART output of received data 9600 8N1 7 MXD Input X TX Data In UART input of data to transmit 9600 8N1 Free Applications Support Email your application questions to support rfdigital com 32 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 RF Module RFDANT a RFD21733 RFD21742 Un Gn 13715 Alton Pkwy Irvine CA 92618 iieri MB dts RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739
16. one inch length copper area is optional however does improve the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Solid blue areas are solder side ground plane which can be used for user electronics as well as the module These are all optional configurations and only for reference The two left examples are preferred but the two right ones will work as well but will not have as good of an antenna pattern RFD21733 21732 21731 e RPO21733 21732 21721 ANTENNA AREA ANTENNA AREA NO COPPER ON ANY NO COPPER ON ANY LAYER IN THS AREA I LAYER IN THIS AREA LI w RPO21733 21732 129791 ANTENNA AREA E NO COPPER ON ANY LAYER IM THIS AREA I Free Applications Support Email your application questions to 67 Copyright RF Digital 7 10 2011 1 40 AM DIGITAL R RFD21733 RoHS CE e ESTI RFD21735 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 Approved amp Certified Fast Answers support rfdigital com RFD21739 RFD21742 RFD21743 RFD21772 RFD21773 RFD21731 RFD21732 RFD21733 Layout Examples 9 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does improve the range if you can add it Parts can be p
17. represent OUT1 OUT2 OUT3 on the receiver all other bits must be zero Byte 2 5 is the specific receivers ESN After sending the 5 bytes wait at least 20 milliseconds before sending again Free Applications Support Email your application questions to support rfdigital com SERIAL UART TRANSMITTER UT SERIAL TXD IN MODE 2 or 3 V 9600 N 8 1 RFD21733 TU SERIAL TXDIN V MODE 2 so 9600 N 8 1 SERIAL UART AMT SERIAL RECEIVER RFD21733 OUT MODE 3 9600 N 8 1 SERIAL UART JT SERIAL NETWORK ind RECEIVER RFD21733 RXD OUT MODE 4 or 6 OUT1 RFD21733 2 4 GHz pr 3 OUTPUT LOGIC SWITCH RECEIVER MODE 5 or 7 E 3 OUTPUT ls LOGIC SWITCH 7 NETWORK RECEIVER V MODE 5 or 7 2 4 GHz RFD21733 our ll Ma stable L 3 OUTPUT LOGIC SWITCH E NETWORK RECEIVER When a transmission is received The RXD pin outputs 5 bytes Byte 1 bit 4 5 6 are the transmitter input states IN1 IN2 IN3 Bytes 2 5 are the 32 bit ESN of the switch transmitter When a transmission is received The RXD pin outputs 5 bytes Byte 1 bit 4 5 6 are the transmitter input states IN1 IN2 IN3 Bytes 2 5 are the 32 bit ESN of the switch transmitter The receiver will only respond to transmitters if it has learned their ESNs When a byte is received by the serial transmitter OUT1 OUT2 OUT3 follow the states in bit position 4 5 6 Depen
18. the RFD21734 and RFD21735 If you have any questions feel free to contact RF Digital Support anytime we re always here to help you RFD21733 21732 21731 ANTENNA AREA NO COPPER ON ANY LAYER IN THIS AREA Free Applications Support Email your application questions to support rfdigital com 58 Copyright RF Digital RFDPS8 RFDP8 Ed sar Re d D G AL RF Module RFDANT g cum cum em wee mmn RFD21733 RFD21742 RoHS CE ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples The following layout examples are for the RFD21731 RFD21732 and RFD21733 module which all have a built in chip antenna Later in this document there are examples for the RFD21734 and RFD21735 modules which are for use with external antennas RFD21731 RFD21732 RFD21733 Antenna Pattern This is a typical antenna pattern however does vary based on many factors including surrounding components and ground planes It is only provided as a reference The one inch copper plane shown helps maintain the balanced antenna pattern and when possible should be used if not possible its not required Antenna Pattern Free Applications Support Email your application questions to support rfdigital com 59
19. then a millisecond All other pull downs or pull ups must be applied by you externally to the Module or RFDANT If you are using the RFD Eval Boards RFD21737 RFD21738 RFD21739 RFD21772 RFD21773 there are 47k pull downs on these Eval Boards see the Eval Board Schematic for reference on Pull Downs and which Pins they on Always send screen captures of your schematics and layouts to support rfdigital com for review Table for Modules and RFDANTs ONLY RFD21733 RFD21735 RFD21742 RFD21743 Pin Z Pin Z 5 16 Mode Select 0 Input 13k ohm pull down for less then 1mS after reset or after power up Inside of Modules and RFDANTs 6 i7 Mode Select impu NONE 7 8 Mode Select mpi NONE 8 4 XLED Status Leam Input Output NONE o 5 INT OUTT LOGIC 10 Input Output NONE 10 6 IN2 OUT2 RXD Input Output NONE O Free Applications Support Email your application questions to support rfdigital com 29 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 Patents Pending D G TAL RF Module RFDANT pons CEs EST a Coe oes RFD21733 FCC IC 13715 Alton Pkwy e Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Table for Eval Boards ONLY RFD21737 RFD21738 RFD21739 RFD21772 RFD21773 EVAL Pin Label Pull Up or Pull Down BOARD Pt ND
20. this is not a production solution its just a quick and dirty way to get a 5V logic circuit to work with a 5V logic circuit for prototyping Of course once you have hooked this up and if it does not work for you do measure the logic levels using a scope on both 5V and 3V nodes to make sure they are actually at sufficient levels to meet the minimums for logic levels for the specific device Note if you do not have a high Z input on the 5V side this will not work At first chance when possible use a proper level shifter capable of sinking and sourcing current and able to do fast switching as this circuit is very limited with its scope of value and use The Eval Boards have a 47k pull down resistor mounted on the above six referenced pins so if you are using an Eval Board then all you need is the series 22K resistor don t add an additional 47k resistor or it will not work but if you are using the RF Module or the RFDANT WITHOUT the Eval Board then you will need to add the 47k resistors 3V LOGIC RF Module or RFDANT IN OUT 47k When using the Module or RFDANT itself you add both resistors for 3V to 5V Free Applications Support Email your application questions to support rfdigital com RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs 21 Copyright RF Digital RFDP8 RFDP8 nd ba ii D G I T A a RF Module RFDANT RoHS CE ESn PH cod RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92
21. when pressing the LEARN button Reset Pin The RESET pin on all part numbers of RF Modules and RFDANT are active low and have an internal 3 3k ohm pull up resistor So at 3V you will need to source at least 1mA to be able to pull it low to cause a reset You can leave the reset pin open you do not need to connect it The only reason you would need to connect the reset pin is if you needed a way to reset the Module or RFDANT while in your circuit A common cause to require this is if you wanted to change modes while powered up and therefore you need to assert a reset to cause the 3 mode pins to be re read to change modes Note keeping reset low all the time will draw about 1mA of current so if you plan on conserving current you will want to bring it low only briefly to cause the reset and then let it go high again using its internal 3 3k ohm pull up Layout Trace Routing and VIAs When doing your layout for the RFD21733 and RFD21735 avoid placing routs under the module if at all possible Having traces under the module as long as they are fully covered by soldermask is typically fine however placing VIAs under the module is not at all recommended since soldermask covering VIAs are typically not fully plugged and protected Therefore if there is any exposes soldermask under the module near an area were your board has an exposed via there is a chance of a short There is a slim chance of this ever happening however if possible make effort to avoi
22. you do not plan on using it tie it to ground using any resistor between 10k to 47k Note this is a BI DIRECTIONAL pin so do not directly connect to an output or to ground you must use a pull down resistor Also when in use with a microcontroller pin you should consider using a series 1k resistor as well between the LOGIC IO pin and your controller pin since that will prevent any possible conflicts that might happen if you chose to drive the pin when it was an output by mistake which can be a very common occurrence In addition if you plan on connecting the LOGIC IO Pin to a pushbutton switch then you must have a series current limiting resistor in the order of about 1k so when you press the button and drive the pin high you can never have more then about a 1mA load on the pin just in case it happened to turn into an output at anytime since it is bi directional Of course the 47k pull down would still be required as well to make sure the input is not floating Free Applications Support Email your application questions to support rfdigital com 34 RFDP8 RFDP8 DIGITAL ev rroa O R A T I O N RFD21733 RFD21742 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE ESTI Un Gn 13715 Alton Pkwy Irvine CA 92618 Se ide dus RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs End to End Latency The RFDP8 firmware buffers
23. 008 www RFdigital com Fast Answers support rfdigital com DECLARATION OF CONFORMITY June 29 2010 RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RF Digital declares that part numbers RFD21731 RFD21732 RFD21733 RFD21734 RFD21735 RFD21741 RFD21742 RFD21743 comply with ETSI EN 300 440 2 power requirements as called out in the R amp TTE V1 2 1 Directive RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs Technical documents for the above mentioned part numbers are held at RF Digital Corporation 13715 Alton Pkwy Irvine CA 92618 Free Applications Support Email your application questions to support rfdigital com 52 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified EF DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com Washing The RFD21733 and RFD21735 are NOT washable RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs Use no clean flux leaded or lead free If you attempt to wash the modules water will enter beneath inside the RF shield and get trapped which may cause device failure or damage once powered on There is no way to make sure all water has been removed before powering the module so do NOT wash
24. 21738 RFD21773 KEYFOBs The RFD21733 stays in 2 uA deep sleep until any combination of the 3 buttons are pressed then it will transmit the state of all 3 inputs With every transmission it also sends its unique 32 BIT ESN Electronic Serial Number LOGIC SWITCH V IN RFD21733 IN2 3 INPUT TRANSMITTER T The RFD21733 stays in 2 uA deep sleep until any combination of the 3 buttons are pressed then it will transmit the state of all 3 inputs With every transmission it also sends its unique 32 BIT ESN Electronic Serial Number MODE 1 V IN RFD21733 IN2 3 INPUT LOGIC SWITCH s TRANSMITTER MODE 2 or 3 Apply a single byte into the V TXD pin to control the states of the switch receiver Bit position 4 5 6 represent OUT1 OUT2 OUTS on the 9600 N 8 1 receiver all other bits must be zero The receivers SERIAL UART RFD21733 outputs states can not be I MILI TXD IN updated any faster then once every 20 milliseconds SERIAL TRANSMITTER Apply a single byte into the moon aes V TXD pin to control the states of the switch receiver Bit position 4 5 6 represent OUT OUT2 OUTS on the 9600 N 8 1 receiver all other bits must SERIAL UART RFD21733 be zero After sending the single byte wait at least 20 milliseconds before sending again TRANSMITTER To address a specific switch receiver apply 5 bytes into the TXD pin Byte 1 bit position 4 5 6
25. 6 or 7 receive modes or in mode 2 or 3 Serial UART modes you will draw 17mA since the receiver is 100 on all the time If you need an internal duty cycle set please contact support rfdigital com for any custom timing you require However if you wish to have control over this yourself since the RFDP8 Modules and RFDANTs are very fast waking 3mS you can easily use a P FET or PNP transistor and just simply remove power from the whole module and then draw ZERO current until you need the module If you need help doing this feel free to contact support rfdigital com anytime The length of an RFDP8 Standard packet is about 12mS so if you use a receiver duty cycle of 10 that will be on for 30mS and off for 270mS which will give you a latency of about 300mS and result in a 90 power savings yielding a 1 7mA average current consumption Doing a 1 duty cycle would bring the average current consumption to 170uA and latency to 3 seconds Custom configurations to fit your application are available simply email support rfdigital com Pull Ups and Pull Downs for RF Modules RFDANTs and Eval Boards The Reset Pin has a 3 3k Pull Up internal to the Module and RFDANT The Factory Pin has a 3 3k Pull Down internal to the Module and RFDANT There are no internal pull ups or pull downs on any other pins except for Mode Select 0 which has an internal 13k pull down temporarily applied when the device comes out of reset or after power up for about less
26. 618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Eval Board Example with internal 47k resistor 5V 3V LOGIC AL 22k RS232 Level Shifter Interface When using Eval Boards you only need to add the 22k series resistor for 3V to 5V To connect to an RS232 port 9600 8N1 you must use a level shifter to shift the voltage levels from RS232 levels to 3V or 3 3V logic There are many ICs which can perform that task all in one chip For example the MAX232 MAX202 or the ICL3321 If you want to connect to a PC you can use this method or you can use a USB port and connect through a virtual communication port shown in the next section You can use this same interface when connecting to the Eval Boards Very important make sure you pull down the Logic IO signal to ground through a 47k resistor if it is not in use note it is bi directional so you must use a pull down 3V MODE2 T3V DB9 RS232 Connector RS232 RS232 3V Logic Levels Levels Level Shifter IC FTDI USB Virtual Communication Interface FTDI manufactures a 3 3V Logic Serial Interface cable which plugs into a USB port and shows up as a COMM port on your PC through which you can connect to PC terminal programs like Hyper Terminal RealTerm and others You can purchase the FTDI cable from Digikey com or other distributors The manufactu
27. 8 duis dca RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 Approved amp Certified Fast Answers support rfdigital com RFD21739 FCC NOTICE RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs Relating to Model Number RFDANT RFD Stock Code RFD21743 LABELING REQUIREMENT FOR USA FCC CERTIFICATION This device has a modular approval from the FCC You must place the following label outside on your product in an obvious location Permanently attached label in a conspicuous location with the following statement This device contains FCC ID UYI RFDANT RF module that 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 NOTES 1 The FCC does not specify the size of the label or the lettering thereon The only requirement is that the text be legible 2 f the entire label can not be placed on the unit due to space constraint e g Pacemaker only contains an FCC ID UYI RFDANT may be displayed on the unit In such cases the compliance statement will have to be included in the instruction to the user FERR It is the users responsibility to determine if their device requires additional approvals Free Applications Support Email your application questions to support rfdi
28. 9 Industrial Controls Remote Control Wireless Mouse Wireless RS485 Vending Machines Light Controls TV Remote Temperature Control Pan Tilt Zoom Control Home Automation Home Stereo Remote HV AC Camera Flash Control Alarm Security Asset Tracking Meter Reading Biometrics Keyless Entry Wireless PTT Data Acquisition Seismic Monitoring Perimeter Monitoring Remote Switches Inventory Control M2M amp many more KEYFOB RFID 350 MODULE FOOT E RANGE RFD21733 RFDANT RFD21743 RFD21742 KEYFOB RFID Free Applications Support Email your application questions to support rfdigital com 4 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified EF DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com PINOUTs RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs There are 11 total active signal pins including power and ground for both MODULEs and RFDANTs The MODULEs have 7 additional ground pins Also the MODULES have one extra pin for a total of 19 pins this is pin 11 which applies only to the RFD21735 which is for external antenna however the RFD21733 pin 11 is a no connect since it has a built in antenn
29. After the mode selection test which is done just once at start up lasts just microseconds It is done like this to allow you to have an optional external switch to select between mode 0 and mode 1 without drawing extra current through an external pull down resistor which would statically be there all the time If you will be directly connecting Mode Select 0 directly to V or to GND that is fine However if you will be adding a pull up note you will be working against a 10k to 16k internal pull down at the time the pin is read so take that into account since it will form a voltage divider and maybe not provide the expected level and cause the module to go into the wrong mode So for Mode Select 0 we recommend using a 1k or smaller resistor for a pull up to make sure you get 90 V for a logic high we often use 220 ohms or just tie it directly to V If you will add a pull down note that it will be in parallel with the internal 13k typical pull down for microseconds duration after reset or power up The Mode Select 0 can be left open if you leave it open it will register as a LOW However if you will know what mode you want in advance and will not be switching it then we always recommend direct tie to V or GND Wake Up Time The Modules and RFDANTS wake up very fast After a reset or after power on 3mS later they are ready to transmit or receive Output Drive Current source and sink The Module and RFDANT output pins and IO pins when
30. C 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs TYPICAL RANGE Range results need to be tested for every application and scenario RF Digital s range tests are done line of sight and outdoors in a typical city street setting You should use these typical range test results as a point of reference until you can conduct your own range tests in your own test environment If you have any questions always feel free to contact RF Digital Support at support rfdigital com La FOOT z MODULE 500 MODULE RFD21743 RFD21742 RFD21733 Meters RFDANT RFDANT N 600 N RFD21743 Meters RFD21743 RFD21742 RFD21742 Free Applications Support Email your application questions to support rfdigital com 3 Copyright RF Digital 9 RFDPS RFDP8 Hesiod ue ia D G TAL RF Module RFDANT eae ce a Canes A mmn RFD21733 RFD21742 RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs TYPICAL APPLICATIONS Active RFID PC Keyboard Security Remote Terminals Keyfob Remotes Long Range RFID Wireless Keyboard Wireless RS232 DB
31. C Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Mode 1 Input Logic Transmitter t dc cd c RR Pin Pin e 7 Mode Select 1 mut Mewen a 4 TTX LED Output Toggles high during transmission 1 Bink every 15 miliseconds 9 5 IM Input Active high switch input 1 optional if not used pull to GND ao 6 IN jnput Active high switch input 2 optional not used pulto GND When all three switch inputs are low the module does not transmit but remains in an ultra low power state consuming only 2uA When any of the three switch inputs go high the module transmits the state of all three inputs As long as any of the three inputs remain high the module continues to transmit the state of all three inputs every 15ms while transmitting it will draw about 15mA You can also tie any of the three inputs to V and then connect a switch between V of the module and your supply then once you apply V to the module it will instantly transmit as fast as possible This method can be used to consume zero current when not in use such as in the case of garage door openers or keyfobs and can be used for many years without consuming any current at all The Reset Pin has a 3 3k Pull Up internal to the Module and RFDANT The Factory Pin has a 3 3k Pull Down internal to the Module and RFDANT There are no
32. D21773 KEYFOBs CHD 22 Free Applications Support Email your application questions to support rfdigital com 44 RFDP8 RFDP8 Copyright RF Digital ee 7 10 2011 1 40 AM D I G TAI fics ennai o R A T oO N Patents Pending RFD21733 RFD21742 RoHS CE ESTI Un a eE 13715 Alton Pkwy Irvine CA 92618 Se ide dus RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs IC Only applies to modules which show IC 6992A 24 on the shield Modules which do not show IC 6992A 24 on the shield are NOT certified for use in Canada RFD21733 modules with date codes before 1120 20 week of 2011 are not Industry Canada approved IC NOTICE Relating to Model Number R24 RFD Stock Code RFD21733 The unit should have a permanently attached label in a conspicuous location with the following statement Contains IC 6992A 24 NOTES 1 Industry Canada does not specify the size of the label or the lettering thereon The only requirement is that the text be legible Free Applications Support Email your application questions to support rfdigital com 45 Copyright RF Digital RFDPS8 RFDP8 DIGITAL kme roar O XJ RFD21733 RFD21742 RoHS CE ESTI Apis s GA ETS RFD21735 RFD21743 RFD21733 FCC IC ton Pkwy Irvine CA RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RF
33. EW on back of board Learn Status TX LED Pin 12 Eval Board RF Module RFD21737 RFD21733 shown RFD21738 RFD21735 RFD21739 RFD21735 a p Y 12 Pin o 4 y 22400 inch OUT1 54mm pitch Logic 10 Out OUT t en s d Pin Header cx LED IN DET Logic IO In Button Pin 1 Mode Slect 2 Mode Slect 0 Mode Slect 1 OPTIONAL Insert CR2032 Battery With Plus Side Up Slide in this direction CR2032 Battery Holder Pin 1 BOTTOM VIEW YO Pin 12 gt Free Applications Support Email your application questions to support rfdigital com 18 O Copyright RF Digital E DEDPS RFDP8 Pd Sie iit Fr D G I T AL RF Module RFDANT pons GEEST See ed RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFDP8 Mode Selector Switch for all 5 Eval Boards The 8 different modes of the RFDP8 Application Protocol are selected using the 3 position dip switch S5 shown in the examples below The 3 inputs have resistor pull downs to ground so when the switch is in its OFF open position there is a low 0 on the input When the switch is in its ON closed position it connects the input to V which produces a high 1 The proper way to read binary is MSB on the left and LSB on the right Switch manufacturers lab
34. F Digital in writing promptly on discovery of the deficiency with reasonable detail within the Warranty Period 2 Customer must return the RF Devices to RF Digital promptly upon receipt of an RMA from RF Digital at Customer s risk and expense and 3 RF Digital confirms the claimed Free Applications Support Email your application questions to support rfdigital com 75 Copyright RF Digital RFDPS8 7 10 2011 1 40 AM DI GI Al Patents Pending Dm RoHS CE ESTI Pr RFD21735 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21733 FCC IC RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 Approved amp Certified Fast Answers support rfdigital com RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs deficiency is present If all of these conditions are met RF Digital at its sole option will either replace or repair the RF Device or credit Customer s account for the amount the Customer paid to RF Digital for the RF Device End of document Free Applications Support Email your application questions to support rfdigital com 76
35. FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs You will need to use the RESET pin this pin normally is not connected for nearly all applications except for reading back the ESN or possibly using it to have the mode pins re read and change modes without power cycling The reset signal does not have to be used instead of using reset you can use power the module off and then back on The reset is a cleaner way of doing it If you are using the RFD21737 RFD21738 RFD21739 RFD21772 RFD21773 eval boards the reset signal is available on pin 5 of the 12 pin connector Internal to the RFD21733 RFD21735 RFD21742 RFD21743 there is a 3 3K pull up resistor on the reset signal so when you are not using it you can just leave it open To activate ESN read back 1 Place the module in a reset state by holding the RESET signal low 2 Hold the LEARN signal high On the Eval board you can press and hold the LEARN button 3 Release the RESET signal 4 Wait 250ms If the LEARN signal goes low at any time during this 250ms interval the module immediately exits ESN read back mode Release the LEARN signal Send the string READ ESN all capitals one space between the two words at 9600 8N1 into the module on the TXD Input signal If this string is not received within 1 second the module exits ESN read back mode DO The module will respond with the E
36. JA SHD 1 L e i pm NO COPPER QN ANY bU lx A LAYER IN THIS AREA xs gt i You can fill t cage van ap d A e RFOZ nT i RFD2 MT 2 RED 1733 Free Applications Support Email your application questions to support rfdigital com 74 Copyright RF Digital 555 nFDP2 Hist Re ed D I G T AL RF Module RFDANT S c g mm um ua umm RFD21733 RFD21742 O CE ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Important Notice RF Digital reserves the right to make corrections modifications and or improvements to the product and or its specifications at any time without notice RF Digital assumes no liability for the user s product and or applications RF Digital products are not authorized for use in safety critical applications including but not limited to life support applications RF Digital assumes no liability for parts or their application beyond replacement or refunding the original purchase price All trademarks and trade names belong to their respective owners Information provided in this document is for reference only The user must conduct testing and prototyping on their own for their own application This document only provides an example of a possible use for the parts shown i
37. KEYFOBs Mode 3 9600 baud UART Serial Transceiver Network M Label Pin Pin L2 19 AV input V Power L 1 16 ND input Ground 5 16 Mode Select 0 Input Tieto V 6 17 Mode Select 1 Input Tieto V 7 3 Mode Select 2 Input Tie to GND Learn Status I O Pulse high through a 220 ohm series resistor to enter learn mode LED Learn Status Output Must be pulled to ground through a 47k resistor and must have series a resistor Logic IO Bidirectional switch logic I O if not used then must be pulled to ground through a 47k resistor Also must have a series IMPORTANT NOTE The RXD pin is DATA OUTPUT The data that the radio receives will come out of this pin The TXD pin is DATA INPUT Drive this pin with the data that you want the radio to send This applies to both UART modes Mode 2 and Mode 3 There are two conventions in industry when referring to TXD and RXD pins The TXD stands for Transmit Data and the RXD stands for Receive Data The conventions conflict when it comes to determining from which prospective are the labels referenced For example TXD in modes industry devices indicates data being transmitted out from that pin indicating that pin is an output The same goes for RXD meaning data being transmitted into that pin from an outside device indicating that pin is an input That is correct for most non communication devices in industry HOWEVER this device when functioning in its UART mode fu
38. Notes Parameter Minimum _ Typical Maximum VDD Supply voltage 1 1 19 30v 36V SuplyRseTime ws 50mS Operating Temperature 4YC 85Cc_ pi Input High Voltage 1 o VDDxO7 VDD ipuLowVotgeg VSS VDDx03 Output High Voltage 05m VDD 0 7V VDD OutputLowVoltage Q05mA vss 03V i Internal CPU Controlled Pull Ups 11kohm 13kohm 16kohm Power pTime ReadytoTransmt ___3mS Power UpTime ReadytoReceve mS AfterReset ReadytoTransmt 3mS AfterRest ReadytoReceve mS Note RFDP8 MO Pin The RFDP8 Modules and RFDANTs have 3 pins used to set the mode the device will go into after reset or power up These pins are called M2 M1 and MO MO pin is the low order pin At power up or when the module comes out of reset it will internally apply a 13k pull down on this pin just for an instant to check if itis high or not After the mode selection test which is done just once at start up lasts just microseconds This is done like this to allow you to have an optional external switch to select between mode 0 and mode 1 without drawing extra current through an external pull down resistor which would statically be there all the time Power Consumption Conditions VDD 3 0V TA 25 C Logic Transmitter Parameter Minimum Typ
39. R Once every 2 seconds depending on the configured mode OUT1 will output a level high signal for a duration of 20 or 500 milliseconds The idle state is low The receiver will only respond to transmitters if it has learned their ESNs Once every 2 seconds the RXD pin will output 5 bytes Byte 1 will have bit 4 and bit 1 set and bytes 2 5 are the 32 bit ESN of the RFID transmitter Once every 2 seconds the RXD pin will output 5 bytes Byte 1 will have bit 4 and bit 1 set and bytes 2 5 are the 32 bit ESN of the RFID transmitter The receiver will only respond to transmitters if it has learned their ESNs OUT1 OUT2 or OUT3 follow output any transmission received by the transmitter switch states IN1 IN2 or IN3 Depending on the configured mode there is a 20 or 500 millisecond hang time OUT1 OUT2 or OUT3 follow output any transmission received by the transmitter switch states IN1 IN2 or IN3 Depending on the configured mode there is a 20 or 500 millisecond hang time The receiver will only respond to transmitters if it has learned their ESNs 15 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFD21739 RFDP8 RFDP8 RF Module RFDANT RFD21733 RFD21742 RFD21735 RFD21743 RFD21737 RFD21772 RFD
40. RFD21743 and RFD21742 Most common applications are typically with burst data less then 24 bytes per burst so the difference between the RFD21743 and RFD21742 is negligible nevertheless the choice is still available for you and they are pin for pin compatible Once you test an RFDANT you will be truly amazed with its performance RFD21743 RFDANT Plugs into your PCB using its 8 inch long cable RFD21742 RFDANT Plugs into your PCB using its 8 inch long cable Free Applications Support Email your application questions to support rfdigital com Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com Revolutionary RFDANT Advantages RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs The RFD21743 and RFD21743 RFDANT are full 2 4 GHz radio transceivers including the RFDP8 protocol completely built into an antenna form factor allowing the entire radio transceiver to be outside your product where only the power and signal cable will extend into your product enclosure to then be connected to your PCB with a simple 1 5mm SMT or THROUGH HOLE connector The RFD21742 and RFD21743 is functionally identical to the RFD21733 module and the
41. RFD21772 and RFD21733 Eval Boards work just like the RFD21737 Eval Board except it has an 11 pin 1 5mm connector on it so the RFD21742 or RFD21743 RFDANT can plug into it The RFD21772 is the Eval board for the RFD21742 and the RFD21773 is the Eval board for the RFD21743 The RFD21772 and RFD21773 each include one RFDANT You need a pair for a complete system The RFD21742 and RFD21743 RFDANTS have been range tested at 2 000 feet which is 4x the range of the RFD21733 which is at 500 feet No special PCB layout is needed for the RFD21742 or RFD21743 RFDANT simply just put a connector on your PCB and you are done All this substantial range increase is achieved all without any increase in current or battery consumption The RFDANT is RF Digital s Patent Pending Radio Inside Antenna product which is a complete radio transceiver and antenna mounted inside of an antenna enclosure suitable for mounting to virtually any type of end product regardless if the enclosure is plastic metal glass really any material The entire radio transceiver is mounted inside the antenna enclosure so there is no loss of RF power to the antenna from the module and results in the most effective power transfer ratio possible providing lowest power consumption possible to achieve a specific range The radio being inside of the antenna and outside the enclosure allows for more room inside the enclosure for the designers application electronics Minimal interferen
42. SN and a firmware identifier on the RXD Output signal at 9600 8N1 and then exit ESN read back mode An example of the output is 314CE686 RFDP8 v1 2 11 18 08 08 45 16 The ESN is 8 characters representing a 32 bit number in hexadecimal format A colon separates the ESN from the Firmware ID The Firmware ID is 32 bytes long The output is terminated with a carriage return line feed pair When the module exits ESN read back mode or if the LEARN signal is not high when the module exists reset the module will enter regular operation in Mode 2 or 3 according to the mode select signals IMPORTANT NOTE Mode 3 and ESN Read Back If at all possible do your ESN read backs in Mode 2 and not Mode 3 The reason for this is that in Mode 3 if you happen to do this manually by hand using an Eval board once the radio outputs the ESN string it will enter normal usage mode meaning it will directly enter into LEARN mode when you release the LEARN pin and then spend 10 seconds waiting for a packet to be received so it can learn its ESN You can prevent this by using a controller to time this activity or you can simply do it in Mode 2 and not have the concern If you have any questions always feel free to email support rfdigital com Watch a video demonstrating how to do the ESN Read Back using HyperTerminal and an Eval Board http www rfdigital com targetpage item amp filteron RFD 76021 Free Applications Support Email your application questions t
43. TTTTLETITTI EE GND TOM VIEW y GND POWER ON Tie to V FACTORY must be open RESET optional MO do not connect use S5 dipswitch M1 do not connect use S5 dipswitch M2 do not connect use S5 dipswitch 10 INT OUT1 LOGICIO 11 IN2 OUT2 RXD 12 N3 OUT3 TXD J rw Wh There is an internal 3 3 Volt LDO on the eval boards At the pin 2 V input pin you can supply 2 1VDC minimum and a maximum of 3 6VDC When your supplied voltage is between 3 4V and 3 6V the internal regulator is in regulation and the internal supply to all parts will be 3 3V and all signals on pins 9 12 will be at 3 3V logic When 2 1V to 3 4V is supplied the internal 3 3V regulator is of regulation and tracks the input voltage minus about 100mv overhead If you supply 2 5V your logic will be at 2 4V and if you supply 2 1V your logic will be at 2 0V The internal 3 3V regulator accept up to a 5V supply input but at 5V supply your logic levels on pins 9 12 will be at 3 3V So you will need to use 3 3V to 5V logic level shifters to run properly at 5V or you will cause damage to the module When using a 5V supply a very quick 5V level shifter method just for testing which works in some cases would be to use a 22K resistor in series between the eval boards 3 3V logic and your 5V logic on pin 9 12 and this is just enough to switch the logic levels in both directions for a quick and dirty level shifter There are NO 47k pull d
44. a RFD21733 RFD21735 MODULES GND OPTIONAL OPTIONAL GND GND OPTIONAL OPTIONAL GND J MODE SELECT 2 MODE SELECT 1 LEARN TX LED STATUS MODE SELECT 0 IN1 OUT1 LOGIC IO Do Not Connect f IN2 OUT2 RXD OUT OPTIONAL RESET RFD21733 RFD21735 There are a total of 8 ground pins you only need just one ground pin for an electrical connection to make the module function The additional ground IN3 OUTS TXD IN 1 9V to 3 6V GND OPTIONAL GND pins are for convenience and also performance with layout configurations The pin 12 10 and 9 are recommended to always be connected since EXT ANT RFD21735 GND GND BUILT IN ANTENNA RFD21733 function RFD21742 RFD21743 RFDANTs RFDANT 11 Pin Connector LEARN TX LED STATUS INT OUT1 LOGIC IO UART OUT IN2 OUT2 RXD UART IN IN OUT3 TXD J O O amp ND Free Applications Support Email your application questions to support rfdigital com they help provide some ground area for the module as well as on the opposing side of the antenna However just one single ground out any of the 8 GND pins are adequate for proper The black wire ground is pin 1 the red wire V Is pin 2 and so on See pinout on left side Copyright RF Digital Z RFDPS REDPS DIGITAL rroa Omm u A RFD21733 RFD21742 cel 13715 Alton Pkwy Irvine CA 92618 d read RFD21733 FCC IC Ey
45. as well as the module These are all optional configurations and only for reference RFDHTM 212 2 724 ANTENNA AREA i 11 NO COPPER ON ANY mia RFD21733 21732 21731 SON Le RFD21733 21T32 21731 3 Fipan Rd ANTENNA AREA lt x 1 INCH LENGTH ANTENNA AREA NEED KO COPPER OW ANY A e Sigl LAYER IH THIS AREA JM LAYER M THIS AREA I RFD21733 TE 121731 H LM or Lx ANTENMA AREA 1 E gage teal 21731 KG COPPER OM AHY n HO COPPER ON ANY a L ODATERM THIS AREA 15 LAYER IH TMISAREA CER REHIA Hna S HA AR su F AX i dna j ANTEN EA T RFDMTANIMTIS 134731 i i NO COPPER ON ANT AHTEHHA AREA T LAYER IN THIS AREA HO COPPER DN ANY LAYER IH THIS AREA nE wo ene AN mrO1133 21732 217213 E ANTENNA AREA i NO COPPER ON ANY LAYER IN THIS AREA 1 INCH LENGTH RFDIITH 21732 24731 pex eS 1INCHLENGTH LAYER IN THIS AREA Free Applications Support Email your application questions to support rfdigital com 66 Copyright RF Digital 7 10 2011 1 40 AM DIGITAL R RFD21733 RoHS CE ESTI RFD21735 RFD21733 FCC IC 13715 Alton Pkwy e Irvine CA 92618 RFD21737 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 Approved amp Certified Fast Answers support rfdigital com RFD21739 RFD21742 RFD21743 RFD21772 RFD21773 RFD21731 RFD21732 RFD21733 Layout Examples 8 The gray area shows where to keep free from copper and components The
46. bL ee RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs FEATURES e Runs on a single coin cell for years WiFi interference tolerant Heavy 2 4 GHz noise and interference tolerant Motor noise and interference tolerant Very low cost No external parts required No RF layout required Easy and ready to use hand held eval and application boards available Ultra small 15mm x 15mm footprint RFD21733 RFD21735 Fully contained truly finished ready to use module CE ETSI IC amp FCC Certified and Approved Typical range 500 feet 150 meters RFD21733 MODULE Typical range 2 000 feet 600 meters RFD21742 and RFD21743 RFDANTS Worldwide 2 4GHz ISM band operation User configurable without need for any programming e 2uA Ultra low power modes Only 14mA current consumption at Odbm TX and 17mA at RX 16 bit CRC data accuracy verification built in 32 bit unique factory ESN in every module 4 billion combination security Flexible network modes including broadcast and individual addressing Optional version available for use with external antenna RFD21735 Switch on off logic remote control without the need for an external controller Switch nodes individually addressable without the need for an external controller Wide supply range 1 9V to 3 6V Built i
47. cally 3V and the RFD21733 and it will automatically transmit once every 2 seconds as an RFID transmitter With every transmission it also sends its unique 32 BIT ESN Electronic Serial Number The RFD21733 stays in 2 uA deep sleep until any combination of the 3 buttons are pressed then it will transmit the state of all 3 inputs With every transmission it also sends it s unique 32 BIT ESN Electronic Serial Number The RFD21733 stays in 2 uA deep sleep until any combination of the 3 buttons are pressed then it will transmit the state of all 3 inputs With every transmission it also sends its unique 32 BIT ESN Electronic Serial Number Free Applications Support Email your application questions to support rfdigital com MODE 0 ACTIVE RFID TRANSMITTER MODE 0 ACTIVE RFID TRANSMITTER MODE 0 ACTIVE RFID TRANSMITTER MODE 1 3 INPUT LOGIC SWITCH TRANSMITTER MODE 1 3 INPUT LOGIC SWITCH TRANSMITTER RFD21733 RFD21733 V IN1 RFD21733 IN2 V IN1 RFD21733 IN2 2 4 GHz RF LEARN LEARN RFD21733 RFD21733 RXD OUT RFD21733 RFD21733 wd RFID LOGIC SWITCH NETWORK OUTPUT ouT1H MODE 2 SERIAL RFID RECEIVER MODE 3 9600 N 8 1 SERIAL UART Y SERIAL NETWORK RFID RECEIVER MODE 4 or 6 3 OUTPUT LOGIC SWITCH RECEIVER MODE 5 or 7 OUT1 3 OUTPUT LOGIC SWITCH NETWORK RECEIVE
48. ce Information The RFD21733 is IC and FCC Modular Approved and Certified therefore for use of the RFD21733 module in your product does not require further IC or FCC testing Detail instructions and IC and FCC notices shown later in this data sheet Any modifications made to the RFD21733 will void the IC and FCC Approval and Certification The RFD21733 has an integrated on board chip antenna You simply include the RFD21733 in your product and follow the IC and FCC notices and information below and place the appropriate label on your product to indicate that it includes an IC and FCC approved module and no further testing would be required for the module The RFD21735 is NOT IC or FCC Approved However it is exactly the same as the RFD21733 except it does not have an internal antenna and is built to allow a user to apply their own antenna of choice Any type of 2 4 GHz antenna may be used Once you include the RFD21735 into your product and your chosen antenna is connected then your whole product is tested by an approved IC or FCC compliance laboratory and you receive your own grant for your whole product which includes the RFD21735 This procedure is somewhat costly and time consuming and therefore the RFD21733 is the primary choice by many engineers The RFD21735 is typically used if you must have an external antenna however we always recommend first looking at the RFD21743 which already has an FCC Approval and is in the form of an external antenna T
49. ce with the internal electronics of the enclosure results in better range and performance of the wireless system The actual effective antenna is pushed away from the enclosure which reduces the effect of holding the enclosure therefore improving the performance range and predictability of the users wireless system Logic level signals are communicated through an unshielded cable not coax to the RFDANT which can be run for long distances without any loss to the performance of the wireless transceiver By the antenna and module being fully outside allows for easy retrofit of nearly any product due to it not consuming any internal space inside the enclosure drill a hole and screw it in add a nut inside to secure it and wire the logic level signals to your electronics Mount on metal or plastic enclosures with no worry about ground effects Stable Antenna Pattern providing substantial well distributed passive gain for transmit and receive results longer repeatable range from your wireless system For free Schematic and Layout design reviews send color screen captures or PDFs of your schematic and layout to support rfdigital com RF Digital s Support and Application Engineers are ready to help you get your wireless application running to today Just send your application questions to support rfdigital com and receive direct fast and accurate answers We look forward to helping you Free Applications Support Email your applica
50. d having VIAs under the Modules Dual Placement Layouts for Modules and RFDANTs When ever possible it is always recommended when you do your layout for the RFD21733 or RFD21735 to also place a footprint for one of the 11 pin RFDANT connectors This gives you the option to do testing by not placing the RFD21733 or RFD21735 module on some of your PCBs and just placing the RFDANT 11 pin connector and plugging an RFDANT into your board If your board does not have room for this then of course this is not in any way required its just a recommendation to give you as much optional choices as possible The RFDANT has about 4x the range of the RFD21733 so if you happen to need the extra range it would always be available with a simple connector interface Free Applications Support Email your application questions to support rfdigital com 27 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL ev rroa O R A T I O N Patents Pending RFD21733 RFD21742 RoHS CE e ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Using CR2032 Batteries The CR2032 battery is very commonly used for power The peak current draw for the Modules and RFDANTs are at about 17mA and the background current is 2uA depending on the mode setting of course Qui
51. d the best suitable fit for your own design Reflow Profile Use standard lead free or leaded reflow profile for the RFD21733 and RFD21735 Your CM Contract Manufacturer should profile this module along with your PCB and all other parts on it through their reflow oven to properly set a profile suitable for all the parts on the board combined USE CAUTION If you are building a double sided placement board place this device last so it will not be subjected to being reflowed upside down As with building any RF devices you should always build a small quantity through your production process test and verify then increase your quantities to make sure the process is not harmful to the performance of your RF system This is true with any RF system including use of these modules Free Applications Support Email your application questions to support rfdigital com 53 Copyright RF Digital RFDP8 7 10 2011 1 40 AM Patents Pending deci RoHS CE ESTI RFD21735 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 Approved amp Certified Fast Answers support rfdigital com RFD21739 RFD21733 RFD21735 Tray Packaging Chomfer Indicates Package PIN 1 Orientation RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs DETAIL B SCALE 1 1 DETAIL A SCALE 2 1 Module PIN3 1 Orientation Top fray used for i cover only with
52. digital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs INDUSTRY CANADA INFORMATION Relating to Model Number R24 RFD Stock Code RFD21733 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 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 Conform ment a la r glementation d Industrie Canada le pr sent metteur radio peut fonctionner avec une antenne d un type et d un gain maximal ou inf rieur approuv pour l metteur par Industrie Canada Dans le but de r duire les risques de brouillage radio lectrique l intention des autres utilisateurs il faut choisir le type d antenne et son gain de sorte que la puissance isotrope rayonn e quivalente p i r e ne d passe pas l intensit n cessaire l tablissement d une communication satisfaisante Le pr sent appareil est conforme aux CNR d I
53. ding on the configured mode there is a 20 or 500 millisecond hang time When a byte is received by the serial transmitter OUT1 OUT2 OUTS follow the states in bit position 4 5 6 Depending on the configured mode there is a 20 or 500 millisecond hang time The receiver will only respond to transmitters if it has learned their ESNs When 5 bytes are received in a row from a serial transmitter OUT1 OUT2 OUTS follow the states in Byte1 bit position 4 5 6 Depending on the configured mode there is a 20 or 500 millisecond hang time The receiver will only respond if byte 2 5 contains it s ESN 16 Copyright RF Digital 7 10 2011 1 40 AM F DIGITA RFD21733 RFD21742 po CE 13715 Alton Pkwy Irvine CA 92618 See IAS RFD21733 FCC IC GE RO C UIN Ne RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified The 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 The 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 Free Applications Support Email your ap
54. e 2 Module 2 will transmit the bytes on its UART with no delay between them Module 1 receives the third byte on its UART and re starts the 15ms timer As with the 2 byte the 4 byte arrives before 15ms elapses and so the 3 and 4 bytes are also sent in a single packet over the air as illustrated in the following timing diagram Module 1 TX in 16 24 31ms RF Wee ee AA AMA mI NE RX out Module 2 Wake up time after power up and saving power After the module is powered on 3mS later it is ready to receive or transmit So if you want to consume zero current when you don t need to use the radio you can simply use an external FET or PNP transistor and turn the device fully off when you don t need it and only turn it on when you want to send or receive data If you require any of this to be done automatically and internally to the Module or RFDANT contact support rfdigital com ESN Read back In certain applications it is helpful to know the ESN of a module There is a provision in both UART modes to read back the ESN when the module comes out of reset ESN read back is not available in any of the other modes Free Applications Support Email your application questions to support rfdigital com 35 RFDP8 RFDP8 DIGITAL evo roar O R A T i O N RFD21733 RFD21742 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE ESTI E a 13715 Alton Pkwy Irvine CA 92618 Se ide dus RFD21743
55. e both embedded with the Patent Pending RFDP8 interference immunity protocol They are pin for pin electrically compatible Except for the different form factor cost and range they are basically the same The RFDANTs have an 8 inch long 1 5mm 11pin connector termination for its interface to your electronics were the RFD21733 module has a 19 pin SMT interface and solders to your PCB Only 11 out of the 19 pins are used for electrical interface The RFD21733 is only 15mm square and has a range of about 500 feet The RFD21733 module is about one quarter the cost of the RFDANT So why would you use the RFDANT There are many reasons The RFDANT is hermetically fully potted and over molded has an industrial rugged enclosure and the full radio system and processing is all built into the Antenna structure itself The RFDANTs mounting does not require a PCB at all simply just drill a hole into your enclosure and feed the 8 inch cable through and apply a nut and your RFDANT is mounted and ready for use The RFDANT does not have impacts from proximity effects from near by metal enclosures and objects The RFDANT has a perfect antenna pattern which provides extraordinary consistent repeatable performance The RFDANT s Revolutionary Patent Pending design enables it to reach distances of 2 000 feet while still being an Ultra Low Power device This huge range is reached without any power amplifiers at all it s unique design is responsible for it reaching thes
56. e great distances without any extra battery drain or extra power The RFDANT makes it easy for you to satisfy GREEN directives due to its unique design and ultra high performance The RFDANT fits in the palm of your hand and looks like an Antenna but of course it is much more since it is the whole radio and processing system in one unit There are no RF cables at all simply connect V GND and a few logic signal wires based on your application and you are done There is no need for PCB layout either You can directly connect to the 11 pin 8 inch cable extending out of the bottom of the RFDANT The RFD21733 is an ideal partner with the RFD21743 or RFD21742 RFDANTs They can communicate with each other using the RFDP8 protocol with switch logic IO or Serial UART You can mix and match them as well with using RFD21733 on one end of your system and an RFDANT on the other The RFD21733 is a perfect fit when you need ultra small size and ultra low cost and the RFDANT is an ideal solution when you need ultra long range and do not want to place any parts onto your PCB Even if you will not be using the RFDANT for your application it is still highly recommended to place the 11 pin connector footprint on your PCB for the RFD21733 so you can have the option to simply plug in the RFDANT for testing during your proto phases or if you happen to have a customer come to you and ask for more range you can simply give it to them by not soldering the RFD21733 and
57. e programmed and tested at the factory The programmed module is therefore immediately ready for use upon delivery Free Applications Support Email your application questions to support rfdigital com 24 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RFDP8 RFDP8 DIGITAL ev rroa O R A T I O N RFD21733 RFD21742 RoHS CE ESTI Un Gn 13715 Alton Pkwy Irvine CA 92618 Se ide dus RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs The RFDP8 firmware use the 3 mode select inputs to select the operating mode These inputs are sampled when the module powers on Some of the operating modes have additional options which are described in the section for that mode The RFDP8 firmware cannot be modified by the user For applications that require alternative functionality contact RF Digital for information about custom firmware to fit your specific requirements RFDP8 Interference Immunity Algorithm RF Digital s RFDP8 proprietary patent pending frequency agility protocol operates in the internationally accepted 2 4 GHz band The RFDP8 s leading edge advanced algorithm is not burdened by a heavy weight stack as is BlueTooth ZigBee WLAN and other protocols which are well suited for cross manufacturer interoperability The RFDP8 protocol is highly robust and effective where there is a need to penetrate through a high saturation
58. el the switches from left to right and furthermore they commonly start with 1 rather then 0 So careful attention needs to be given to identify the switch positions The binary is read from MSB to LSB rather than LSB to MSB as shown in the examples below To remove all doubt only follow the examples shown below Mode 0 Mode 1 Mode 2 Mode 3 Active RFID 3 Input Serial UART Serial UART Transmitter Switch Logic Transceiver Transceiver Transmitter 9600 8N1 9600 8N1 Network E 219 CE i an Se hi 2 g ww 3 Output Switch 3 Output Switch 3 Output Switch 3 Output Switch Logic Receiver Logic Receiver Logic Receiver Logic Receiver 500ms Hang Time 500ms Hang Time 20ms Hang Time 20ms Hang Time Network Network EM a P ampan o gt o Free Applications Support Email your application questions to support rfdigital com 19 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFDP8 RFDP8 RF Module RFDANT RFD21733 RFD21742 RFD21735 RFD21743 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 Tel 949 610 0008 www RFdigital com RED21738 RFD21773 Fast Answers support rfdigital com RFD21739 KEYFOBs gt 12 IN3 OUT3 TXD gt 11 IN2 OUT2 RXD gt 10 IN1 OUT1 LOGIC IO M2 do not connect use S5 dipswitch M1 do not connect use S5 dipswitch MO do not connect use S5 dipswitch RESET optional FACTORY must be open POW EP O N Ti o te gt V ECTES
59. gital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL ev rroa O R A T I O N a RFD21733 RFD21742 Un Gn 13715 Alton Pkwy Irvine CA 92618 iieri MB dts RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs 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 The LEARN STATUS pin is bidirectional it is an input when in the LEARN state and an out
60. gital com 49 O Copyright RF Digital 555 nFDP2 Hist Re d D G T AL RF Module RFDANT dpi g mm um ua umm RFD21733 RFD21742 O CE ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs SAMPLE FCC STATEMENT TO BE INCLUDED IN USER S MANUAL Relating to Model Number RFDANT RFD Stock Code RFD21743 INSTRUCTION TO THE USER if device contains a digital device 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 eq
61. gital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 5 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does improve the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Plastic Enclosure Plastic Enclosure Plastic Enclosure Free Applications Support Email your application questions to support rfdigital com 64 Copyright RF Digital RFDPS8 RFDP8 ee ea D G I T A a RF Module RFDANT CES ES a RFD21733 RFD21742 RED21733 ECC IC 13715 Alton Pkwy Irvine CA 92618 Eco RA RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 6 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does improve the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again
62. he RFD21743 is FCC Modular Approved and Certified therefore for use of the RFD21743 module in your product does not require further FCC testing Detail instructions and FCC notices shown later in this data sheet Any modifications made to the RFD21743 will void the FCC Approval and Certification The RFD21743 has an integrated antenna You simply include the RFD21743 in your product and follow the FCC notices and information below and place the appropriate label on your product to indicate that it includes an FCC approved module and no further testing would be required for the module The RFDANT RFD21743 is a great alternative to needing to get your own FCC approval with the RFD21735 combined with your own antenna The RFD21743 has an excellent antenna pattern which provides about 4 times more range than a RFD21733 and does not require mounting to your PCB since it has its own antenna enclosure More details about it below in this data sheet It should be considered before starting your design with an RFD21735 and your own external antenna since it accomplishes the same task without the need for further compliance approvals CE ETSI Compliance Information The RFD21733 RFD21735 RFD21742 and RFD21743 are CE ETSI Tested See declaration of conformity later in this document RFDP8 Firmware RF Digital offers firmware for the RFD21733 RFD21735 RFD21742 RFD21743 which meet many common user requirements The firmware and a unique identifier are pr
63. he module is to be made with a thin trace so the one inch ground plane off to the side can be effective Plastic Enclosure RF Signals in this area If you place anything such as components wires metal parts of any type in this area it will block the RF signals and drastically limit your range Leave this area open Free Applications Support Email your application questions to support rfdigital com 60 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 2 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does improve the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Also the signal connections to the module can be made on either layer The electrical ground connection to the module is to be made with a thin trace so the one inch ground plane off to the side can be effective RF Signals in th
64. ical Maximum Ultra low power mode background Switch Logic Transmitter 2UA UART or Switch Logic Transmitter Receiver Parameter Minimum Typical Maximum Listening Receiving mA Transmitting mA Free Applications Support Email your application questions to support rfdigital com 42 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified EF DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com Overall Dimensions Top View TOP VIEW SHIELD AREA RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 Free Applications Support Email your application questions to support rfdigital com RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs 43 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified EF DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com PCB Layout 8 182 j 0 038 H TOP VIEW I amp E 9 ANTENNA AREA NO COPPER RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 PAD 0 132 Pel RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RF
65. in a row and then you must wait a minimum of 24 byte lengths which is about 24mS before you send up to another 24 bytes For example you can also send 12 bytes wait 12mS and then send 12 bytes again effectively yielding a 50 duty cycle Note this is only a transmit limitation with the RFDANT it is not related to receive so if you have a RFD21733 sending 100 duty cycle at full speed you can receive that with either RFDANT and it will be fine But when you go to transmit if you are using the RFD21743 you will need to use a maximum of a 50 duty cycle for the USA and FCC However when using the RFD21742 which is for Europe and the CE ETSI markets there is no duty cycle limitation That is the reason there are two part numbers for the RFDANT the RFD21743 is 50 UART duty cycle for FCC and the RFD21742 is CE and ETSI with 100 duty cycle So if you plan on selling into the USA market place then use the RFD21743 if you are Europe ONLY then you can use the RFD21742 Also of course you can use the RFD21743 for USA and Europe If you are sending in switch mode using the RFD21742 it will send a new packet every 16mS and the hang time for a switch receiver in mode 6 or 7 is 50mS Where with the RFD21743 it will send a new packet every 24mS to work within the 50 duty cycle limit for FCC and IC If you require Canada IC Approval for the RFD21743 please contact sales rfdigital com The impact with switch mode is hardly even noticed between the
66. in an output mode should not be expected to drive higher then 0 5mA each This is done by design to keep as much high current sources from flowing through the Module or RFDANT The amount of source and sink current available at the pins are actually quite a bit more therefore they are seen in applications were they can directly drive LEDs with a series resistor of about 220 ohm and the LED still comes on at a couple milliamps but we don t recommend that for production For prototyping that is fine since its quick and simple to hookup but for production we prefer to use a driver like a transistor or FET to Free Applications Support Email your application questions to support rfdigital com 28 Copyright RF Digital RFDP8 RFDP8 Esk a D G T A a RF Module RFDANT Sere g umu u mrm RFD21733 RFD21742 O CE ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs switch as much current as you like to drive your external devices such as high brightness LEDs Note you must always use a series current limiting resistor when connecting an LED to a pin of course The outputs are active high and therefore you can use an NPN transistor or an N channel FET to switch the ground lead of an LED easily Power Saving When in mode 4 5
67. individual addressing of receivers in Network Mode the UART can send a particular receiver s ESN after the byte for the logic state In this case the receiver will only accept the packet if the ESN in the data portion matches the receiver s own ESN If the receiver is actively learning ESN s it will learn only the ESN from the packet header the ESN in the data portion will not be learned Free Schematic Layout and Application Design Reviews For free Application Schematic and Layout design reviews send color screen captures or PDFs of your schematic and layout to support rfdigital com RF Digital s Support and Application Engineers are ready to get your wireless application running today Why spend lots of time reading volumes of data Instead simply send your application questions to support rfdigital com and receive direct fast and personal answers focused on your specific project and needs We look forward to hearing from you Free Applications Support Email your application questions to support rfdigital com 41 Copyright RF Digital RFDP8 RFDP8 Esk a D G AL RF Module RFDANT RoHS CE ES Oo R A T I o N RFD21733 RFD21742 RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Electrical Characteristics Operating Conditions
68. instead plugging in the RFD21742 or RFD21743 RFDANT If you have further questions about the trade offs between the Modules and the RFDANTS always feel free to contact support rfdigital com were you will find very quick and helpful answers to your questions RFD21733 Module RFD21742 or RFD21743 RFDANT Solders to your PCB with its SMT pads Plugs into your PCB using its 8 inch long cable Free Applications Support Email your application questions to support rfdigital com 7 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified EF DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs Differences between RFD21742 and RFD21743 RFDANTs The RFD21742 and RFD21743 are 100 identical hardware the only difference between the two is firmware loaded at the RF Digital factory The RFD21742 is in compliance with CE ETSI emission requirements and is not for FCC The RFD21743 is in compliance with CE ETSI emission requirements and is FCC Certified and Approved The high performance of the RFDANT for FCC requires it to work in a 50 duty cycle mode which means that when you are running it in its 9600 8N1 UART mode you can send up to 24 bytes
69. is area Plastic Enclosure LI RFD21733 21732 21731 ANTI NNAAREA l s MOCOPPERONANY epee LAYER IN THIS AREA If you place anything such as components wires metal parts of any type in this area it will block the RF signals and drastically limit your range Leave this area open Free Applications Support Email your application questions to support rfdigital com 61 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 3 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does improve the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Plastic Enclosure RF Signals in this area If you place anything such as components wires metal parts of any type in this area it will block the RF signals and drastically limit your range Leave this area open Free Applications Support Email your ap
70. ission from an RFID Transmitter and is set to 1 if this is the case For example if an RFID Transmitter with ESN 314CE686 sent a packet on its 2 second interval a UART would receive the bytes 11 31 4C E6 86 in binary format If input 1 on that same RFID transmitter were pulled high the UART would receive the bytes 10 31 4C E6 86 in binary format since bit O is clear the receiver can tell that this was not a periodic transmission Most ESN s will contain at least one unprintable character and so this data will not be suitable for displaying directly in a terminal package such as HyperTerminal but a PC based program or an embedded system such as the BASIC Stamp can collect the data and display it in a more friendly fashion There is a very useful tool on the web called RealTerm it is a HyperTerminal like software which can be put into binary mode and with it you can easily view the individual bytes sent from a serial transmitter to a UART receiver The ESN which the UART receives is the same one that is in the packet header If the UART is in Network Mode and has not learned the ESN it will never receive the packet and there will be no output on the serial port Serial UART to Logic Receiver A UART can also send data to a logic receiver which will decode the data and assert its outputs as though it received a packet from a logic transmitter The data format is very similar to the one described in the previous section The differe
71. laced all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Solid blue areas are solder side ground plane which can be used for user electronics as well as the module These are all optional configurations and only for reference The two left examples are preferred but the two right ones Will work as well but will not have as good of an antenna pattern nr021713 217342 21724 e ANTENNA AREA EX NO COPPER ON ANY LATER MH THIS AREA 1 NO COPPER ON ANY xcd ere 2 732 0724734 AL RFD21733 21742 21731 DEEP COPPER NO COPPER ON ANY LAYER IN THIS AREA LAYER IM THIS AREA OMANY Free Applications Support Email your application questions to RFD2iT33 21732 21701 1 NTEN IM LAYER IN THES AREA IUE 68 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 10 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does imp
72. m copper and components These shown are not good layout locations for the module since they take up most of your board area it is best to locate the module similar to the examples shown in other areas of this document where you have more board space for your parts These examples are shown as what NOT to do If you place parts in the gray area it will result in very bad range performance NO PARTS OR COPPER NO PARTS OR COPPER RF021733 21732 24721 ANTENNA AREA NO COPPER ON ANY LAYER IN THIS AREA NO PARTS OR COPPER NO PARTS OR COPPER Free Applications Support Email your application questions to support rfdigital com 70 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL evo roar O R A T i O N eri RFD21733 RFD21742 Un Gn 13715 Alton Pkwy Irvine CA 92618 iieri MB dts RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 12 The gray area shows where to keep free from copper and components These shown are not good layout locations for the module since they take up most of your board area it is best to locate the module similar to the examples shown in other areas of this document where you have more board space for your parts These examples are shown as what NOT to do If you place parts in the gray area it will
73. me Bidirectional serial transceiver normally sits in receive mode receiving and outputting serial bytes out of the RXD pin as they come TUUU LEARN RXD OUT in When user sends data 9600 N 8 1 aoar D ooa 9600 N 8 1 in When user sends data into TXD pin it automatically SERIAL UART RE SERIAL UART _ into TXD pin it automatically switches to transmit The Ill switches to transmit The receiver will only respond to AUT Saree UT receiver will only respond to transmitters if it has learned SERIAL SERIAL a transmitters if it has their ESNs NETWORK s NETWORK learned their ESNs TRANSCEIVER TRANSCEIVER MODE 2 V V MODE 3 Bi directional serial transceiver normally sits in receive mode receiving and outputting serial bytes out of UUU the RXD pin as they come Bi directional serial transceiver normally sits in receive mode receiving and outputting serial bytes outof U LILI RxD OUT the RXD pin as they come 9600 N 8 1 2 4 GH in When user sends data SERIAL UART RFD21733 9600 N 8 1 in When user sends data into TXD pin it automatically RP UT SERIAL UART into TXD pin it automatically switches to transmit AEN TXD IN RXD OUT NUL switches to transmit The receiver will only respond to SERIAL transmitters if it has learned SERIAL NETWORK their ESNs TRANSCEIVER TRANSCEIVER MODE 4 or 6 In this mode simply apply V V Once every 2 sec
74. n high performance internal miniature antenna RFD21733 Peer to Peer Ad Hoc networks and configurations Point to Multi Point networks and configurations Multi Point to Multi Point networks and configurations Selective addressing of any module by using factory built in ESN Fast turn around minimal latency 20 millisecond Patent pending RFDP8 interference tolerant protocol Full application protocol runs transparent to the user Easy to use simple to design in Stores up to 60 ESNs Electronic Serial Numbers for network modes Many to one data modes ideal for multi point data acquisition Unlimited number of module nodes can communicate to each other CUSTOM Modules RF Digital s RFDP8 application firmware loaded into the MODULEs or RFDANTs can be customized to fit application specific requirements RF Digital can design and manufacture fully custom modules to fit your needs If you do not find what you re looking for feel free to contact RF Digital with your requirements Email support rfdigital com FAST Support For free RF layout design reviews send color screen captures of your layout to support rfdigital com you will save time and money before you fab your boards Our FAST RESPONSE Support Team welcomes your questions RFDP8 Application Protocol Mode Selector Chart RFDP8 Standard Mode Chart RF Digital Corp 07 05 11 10 07 PM 2 1 0 Mode Description
75. n this design and requires actual testing to confirm its accuracy or validity or proper application There is NO suggestion that the devices shown in this document should be used for the implied application There is no guarantee or warranty of suitability for any specific application The information disclosed in this document is AS IS By using any information contained in this document you are assuming all risks and liability associated therewith RF Digital reserves the right to make corrections modifications changes and or improvements to specifications or details at any time without notice or obligation RF Digital assumes no liability for the user s product and or applications RF Digital products are not authorized for use in safety critical applications including but not limited to life support applications RF Digital assumes no liability for parts or their application beyond replacement or refunding the original purchase price paid to RF Digital Limited Product Warranty RF Digital warrants that RF Devices manufactured by RF Digital are free from defects in material and workmanship for Ninty 90 Days from date of delivery RF Devices covered by this warranty and returned to RF Digital within the Ninety Day Warranty Period will be eligible for replacement repair or credit limited to the amount RF Digital was paid for the RF Device To obtain a remedy under this Warranty the following conditions must be met 1 Customer must notify R
76. nces matter only when the receiver is in Network Mode The UART must follow a packet with at least 15ms of no data so that all bytes as described below are sent as a single packet Note that a UART can send a single zero byte all bits clear to force a receiver to turn off its outputs immediately regardless of hang time Format 1 Byte Bit7 Bit6 Bits Bit4 Bits Bit2 Bit Bito Pt output Output 2 Output When the receiver is not in Network Mode the receiver will accept any packet it receives and so this is the preferred format Free Applications Support Email your application questions to support rfdigital com 40 RFDP8 RFDP8 DIGITAL ensue rroa O R A T i O N Patents Pending RFD21733 RFD21742 RoHS CE e ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Copyright RF Digital 7 10 2011 1 40 AM A receiver in Network Mode will use the UART s ESN from the packet header to determine if it should accept the packet This allows one UART to send the same data to multiple receivers provided that each receiver has learned the UART s ESN Format 2 Byte Bi7 Bite Bits Bit4 Bis Biz Biti Biko Pt Output3 Output2 Ouputt LL 2 ESN Byte 1 EX To allow
77. nctions as a communications device A Wireless Pipe therefore the pin functions are reversed since they are from the radios prospective which is used in the RF communications field In the RF communications field TXD means data to be transmitted indicating the TXD pin is an input The same goes for RXD from the radio prospective which indicates that pin is an output which is responsible for outputting the data the radio has received Both references are right its just a matter of knowing which one to use If you are ever in doubt about the direction of data signals it is always recommended to place a 1k series resistor on the TXD pin and RXD pins in between the radio and your device so there is never any chance of a possible conflict while you are prototyping causing device damage Mode 2 and Mode 3 are both 9600 baud half duplex UART modes suitable for connection to a microcontroller or a level translator such as a MAX202 then to an RS 232 port RF transmission takes priority over RF reception so that a module will not receive anything over the air if it is given a full speed stream of serial data on its TXD input pin Only when you stop sending data there will be a chance for you to receive data The UART is configured for 9600 baud 8 data bits 1 stop bit and no parity Because the module does not perform any parity checking on the data stream it is possible to use 7 data bits with even or odd parity instead of 8 data bits with no pa
78. nd below to identify the colors objects and their meanings in this document 0 031 to 0 062 PCB BOTTOM COPPER NO COPPER or COMPONENTS VIA BETVVEEN TOP AND BOTTOM Free Applications Support Email your application questions to support rfdigital com 57 Copyright RF Digital RFDPS8 RFDP8 Ed sar Re d D I G T A a RF Module REDANT GE ES mer eme RFD21733 RFD21742 8 RFD21735 RFD21743 RFD21733 FCC IC i Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Example Pinout This Layout Examples document only references pins that are common to all RFD21731 2 3 4 5 modules and matter to the layout which are ground and external antenna connections where applicable To keep the file size of this document small some of the larger images are outputted in lower resolutions for full details on pinouts refer to the data sheet for the appropriate part number which can all be found at http www rfdigital com Pins labels 3 4 5 6 7 14 15 16 17 change based on which part number module is being used however that does not matter for this document because the same layout rules apply to the RFD21731 RFD21732 RFD21733 RFD21734 and RFD21735 modules Majority of this document addresses the RFD21731 RFD21732 RFD21733 and the end of this document addresses
79. ndustrie Canada applicables aux appareils radio exempts de licence L exploitation est autoris e aux deux conditions suivantes 1 l appareil ne doit pas produire de brouillage et 2 l utilisateur de l appareil doit accepter tout brouillage radio lectrique subi m me si le brouillage est susceptible d en compromettre le fonctionnement Free Applications Support Email your application questions to support rfdigital com 46 O Copyright RF Digital EDP RFDPS Pd Nds Fr D G T AL RF Module RFDANT ROHS CE 2EST O EN RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs FCC NOTICE Relating to Model Number R24 RFD Stock Code RFD21733 The unit should have a permanently attached label in a conspicuous location with the following statement Contains FCC ID UYI24 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 NOTES 1 The FCC does not specify the size of the label or the lettering thereon The only requirement is that the text be legible 2 f the entire label can not be placed on the unit due to
80. nstructions see sections below RFD21773 Eval Board for RFD21743 RFDANT RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21772 RFD21773 Eval board with RFDANT cable plugged into the 11 pin connector When ordering part number RFD21773 you receive an RFDANT eval board pictured below AND you also receive an RFD2143 RFDANT For Eval board usage instructions see sections below Free Applications Support Email your application questions to support rfdigital com 12 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified EF DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21773 RFD21743 RFDANT Dimensions Flexible RFDANT cable does not have any shielding due to its revolutionary design and therefore does not need it The 11 conductor cable is flexible and can easily confirm to fit your enclosure Simply drill hole into your enclosure insert the RFDANT and you have instant excellent range performance L1 3 9 100 REF 7 518 4 3 8 X 32UNF THREAD 8 0MM FLAT INTERNAL TOOTH LOCK WASHER 3 8 X 32UNF NUT 11 POSITION 1 5MM PIN HOUSING E 5 5 Free Applications Support Email yo
81. o support rfdigital com 36 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC DIGITAL 13715 Alton Pkwy Irvine CA 92618 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs Approved amp Certified Fast Answers support rfdigital com RFD21739 Mode 4 Switch Receiver with Logic Output 500ms hang time Mode 5 Switch Receiver with Logic Output 500ms hang time Network Meme pre pa Pin Pin Z 6 i7 ModeSelectt mput Meta BND 7 3 Mode Select 2 Input Tie to V Tie 0 o O 4 Learn Status I O Pulse high through a 220 ohm series resistor to enter learn S A T pas LED Learn Status Output Must be pulled to ground through a 47k resistor and must have series a resistor 9 5 pum Output _fActive high switch output 1 500 millisecond hangtime 10 6 QUT2 Output ctivehigh switch output 2 500 millisecond hang time 11 7 JOUT3 Output Active high switch output 3 500 millisecond hang time Mode 6 Switch Receiver with Logic Output 20ms hang time Pin Pin F2 13 w ro ob L 5 16 Mode Select e 17 Mode Select L 7 3 Mode Select 2 8 4 Not Used Output Leave open not used o e our L6 our OUTS Free Applications Support Email your application questions to support rfdigital com 37 C
82. oard If you place ground plane or any traces under the gray area marked no copper then you will not have the option to use the RFD21731 RFD21732 RFD21733 which are the on board chip antenna versions of the RFD21734 RFD21735 So itis your choice if you choose to flood copper under that area or not There is no benefit to flood copper in that area If you choose to make a dual mode layout to handle both module options with chip antenna or without which is what we recommend then also advise with the layout configurations above for proper application We highly recommend that you look at the RFD21743 and RFD21742 before starting a design with the RFD21734 or RFD21735 The RFD21742 and RFD21743 are RF Digital s Patent Pending RFDANTs which are complete RF Modules setup for external use and already in an antenna form factor allowing you to simply plug it into any product instantly without needing any layouts RF connectors or coax cables They offer exceptional range about 4x that of the RFD21733 Save time money and no need for additional compliance approvals since the RFD21743 is FCC Approved and Certified RFD21733 ia 732 iM A EA e I gs EU HO COPPER ON ANY ETT L J LAYER IM THES AREA n fil pia caper i in yeu know you ML REDI1733 21732 1 21721 ANTE NO COPPER ON ANT LAYER IN THIS AREA th ver ue th RPC RFD2 1132 RFO41733 IMS FEDERE d will e AFGAAT 1 RED 1132 RFD21723 REDT33 21732 21733j
83. of RF noise which is common in nearly all environments today lt 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 its 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 cur
84. ombinations on the receiver s outputs The term Hang Time means the period the output will stay high after it has been turned on It will stay on for the duration of the hang time waiting on another packet to be received if no other packet is received it will go low after the hang time period If a packet is received within the hang time period it will continue to stay high again for that period of the hang time setting either 20mS or 500mS If repetitive packages are received within the hang time window then the output which was high will continue to stay high as long as that same input is kept high at the transmitting radio or Serial transmitter which sent the packet Hang time is a trade off between off time latency and resiliency to packet loss With all RF systems sometimes a packet will be lost especially as the distance between the transmitter and the receiver grows If an output is connected to a relay driver packet loss will result in chattering on the relay which will not have good results The 500ms hang time is perfect for applications like a keyless entry system or a garage door opener For faster switching to the all off state the 20ms hang time is preferred Since a transmitter sends new data every 15ms the time delay to turn off all outputs is only 5ms more than to update the outputs to a different state where at least one of them is still driven high Free Applications Support Email your application questions to suppor
85. onds 1 9 to 3 6 VDC typically 3V depending on the configured and the RFD21733 and it ue mode OUT1 will output a will automatically transmit level high sna for a once every 2 seconds as an duration of 20 or 500 RFID transmitter With every ge RFD21733 i m LOGIC milliseconds The idle state transmission it also sends TRANSMITTER RF SWITCH is low its unique 32 BIT ESN OUTPUT RECEIVER Electronic Serial Number Free Applications Support Email your application questions to support rfdigital com 14 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFD21739 RFDP8 RFDP8 RF Module RFDANT RFD21733 RFD21742 RFD21735 RFD21743 RFD21737 RFD21772 RFD21738 RFD21773 KEYFOBs In this mode simply apply 1 9 to 3 6 VDC typically 3V and the RFD21733 and it will automatically transmit once every 2 seconds as an RFID transmitter With every transmission it also sends it s unique 32 BIT ESN Electronic Serial Number In this mode simply apply 1 9 to 3 6 VDC typically 3V and the RFD21733 and it will automatically transmit once every 2 seconds as an RFID transmitter Vvith every transmission it also sends it s unique 32 BIT ESN Electronic Serial Number In this mode simply apply 1 9 to 3 6 VDC typi
86. only if possible E Os SS os RFDITT33 21732 21733 lt ANTENNA AREA NO COPPER ON ANY LAYER IM THIS AREA ual ez i a cd ES ug RFDHT353 217232 21723 A ANTENNA AREA E NO COPPER ON ANT 2 LAYER THIS AREA aroma mr mia NO COPPER ONANY LAYER IN THIS AREA NO COPPER OM ANY ni LAYER IN THIS AREA RFDIHTI3 210732 21733 Am NO COPPER ON ANY ES LAVER IN THIS AREA means yee ANTENNA AREA 08 E NO COPPER ON ANY Tn LAYER IN THIB AREA S Free Applications Support Email your application questions to support rfdigital com 65 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 Patents Pending D G TAL RF Module RFDANT pons CEs EST Coe od RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 7 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does improve the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Solid blue areas are solder side ground plane which can be used for user electronics
87. opyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL evo roar O R A T i O N egi RFD21733 RFD21742 Un GLA 13715 Alton Pkwy Irvine CA 92618 iieri MB dts RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Mode 7 Switch Receiver with Logic Output 20ms hang time Network en pem Pin Pin 6 17 ModeSeect nut et O OoOO 7 3 Mode Select2 Input Tie to V Teto V 0000 00000 4 Learn Status I O Pulse high through a 220 ohm series resistor to enter learn mode EI IP E Learn Status Output Must be pulled to ground through a 47k resistor and must have series a resistor 9 5 O A i ctive high switch output 3 20 millisecond hang time Fast Switch Latency The RF Modules and RFDANTS with their patent pending RFDP8 interference tolerant protocol have fast response times When using a Mode 0 or 1 transmitter and a Mode 4 5 6 or 7 receiver from the time the transmitter switch input goes high the receiver output will go high as fast as 5 milliseconds later It might take as long as 12mS but most of the time it is closer to the 5mS time frame In Mode 4 Mode 5 Mode 6 and Mode 7 the Module or RFDANT is always in switch receiving mode The receiver drives its outputs to match the values received in a packet from a transmitter This allows up to 8 possible 2 c
88. or cover only with NO Modules Free Applications Support Email your application questions to support rfdigital com RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs 56 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL ensue rroa O R A T i O N Patents Pending RFD21733 RFD21742 RoHS CE e ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Surface Mounted RF Module Layout Examples For Part Numbers RFD21731 RFD21732 RFD21733 RFD21734 RFD21735 Free Schematic Layout and Application Design Reviews For free Application Schematic and Layout design reviews send color screen captures or PDFs of your schematic and layout to support rfdigital com RF Digital s Support and Application Engineers are ready to get your wireless application running today Why spend lots of time reading volumes of data Instead simply send your application questions to support rfdigital com and receive direct fast and personal answers focused on your specific project and needs We look forward to hearing from you RFD21733 FCC IC Approved Built In Antenna For use with External Antenna uc c Do 3 35 y d a i P Wi j La E 21731 21732 21733 21734 21735 Please use the lege
89. own resistors on the Modules or RFDANTs so you must add your own pull downs or pull ups accordingly Free Applications Support Email your application questions to support rfdigital com 20 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified RFDP8 DIGITAL neu R O R A T i O N RFD21733 13715 Alton Pkwy Irvine CA 92618 Bo Tel 949 610 0008 www RFdigital com RFD21738 Fast Answers support rfdigital com RFD21739 RF Modules and RFDANTS run on 3V Logic Levels 1 9V to 3 6V The RFD21733 RFD21735 RFD21742 and RFD21743 all run on a supply of 1 9V to 3 6V They have an internal voltage regulator which is set to 1 8V and it is an LDO so you only need about 100mV of overhead to keep it in regulation Most circuits which will interface with these devices will be 3V or 3 3V typical so we will use those voltages for reference in this section If your circuit runs on 2 5V 3V or 3 3V then no problem you can directly apply supply voltage of 2 5V 3V or 3 3V to the Module or RFDANT and all your logic signals will be at 2 5V 3V or 3 3V for a direct interface with your hardware However if your circuit is running at a higher voltage such as 5V then you need to use a level shifter IC or a circuit which will translate the Module or RFDANT signals from 3V to 5V for your circuit and also the 5V from your circuit to the 3V for the Module or RFDANT Of course you
90. plication questions to Fast Answers support rfdigital com RFD21739 The 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 MALE ANTENNA NOT INCLUDED 17 RFDP8 RFDP8 Copyright RF Digital eS 7 10 2011 1 40 AM D I G T Al ls eed oO R A T o N Patents Pending RFD21733 RFD21742 RoHS CE ESTI uc ni 13715 Alton Pkwy Irvine CA 92618 Se ide dus RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Eval Board Top and Bottom Labeled Views All 5 Eval Boards including the RFDANT boards can be powered from their on board CR2032 3V battery or through the 12 pin 0 100 inch 2 54mm pitch header which can plug into directly into standard solderless breadboards or connect to mating a 0 100 inch 2 54mm mating socket The Eval Boards can work as stand alone or can be wired to your application The RFDANT Eval Boards have an RFDANT 11 pin connector instead of a Module Board Antenna Connection RFD21737 No Antenna because the module has a built in antenna shown RFD21738 Wire Antenna RFD21739 SMA Connector Power Switch ESN Le i Button CR2032 V battery TOP VI
91. plication questions to support rfdigital com 62 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 4 The gray area shows where to keep free from copper and components The one inch length copper area is optional however does improve the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Plastic Enclosure Plastic Enclosure ah RFD241733 E ee ANTE Tt XEM NocoPPERONAMY rel LAYER IM THIS AREA Plastic Enclosure E GHO GO EN RFO21733 21732 1 24 734 I TET ANTENNA AREA 1 DD m M GHOD IN THES AREA COPPER ON ANY LAYER Free Applications Support Email your application questions to support rfdigital com 63 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdi
92. ption If you determine that you need a different period of transmission other than 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 O If longer periods of use are required a larger battery can be used to allow it to run up to years of time without replacing the battery or contact RF Digital to inquire about a custom time setting which will reduce the transmission interval thus reducing the average power consumption The Mode 0 is effectively Mode 1 except in addition to Mode 1 features the module will internally cause input 1 to transmit on its own every 2 seconds So Mode 0 can be looked at like it is a dual mode it is functioning as an RFID transmitter as well at the same time it is available to use as a 3 input switch transmitter If you use a Mode 2 or Mode 3 receiver with a Serial UART output you can easily detect the difference between transmissions which were caused by the RFID interval automatically or by the user pressing a button to cause IN1 IN2 or IN3 to go high which causes an immediate transmission regardless of RFID interval Note if you connect a series resistor and an LED to the LED output pin that will draw extra current during the 15mS transmission time it is good to have it there for testing but take that into consideration when yo
93. put 1 2 or 3 on the RFD21733 Module or RFD21743 RFD21732 RFDANT to go high for the duration the button is pressed when in one of the 4 switch modes If in Serial UART mode then you will Rotatable Buttons receive 1 byte representing which button is pressed or if RFID transmission and 4 more bytes indicating the 32 bit unique ESN of the KEYFOB RFD21782 RFD21792 LI 2 Button Switch Keyfob 2 Button RFID Keyfob Pressing button 1 or 3 will cause the output 1 or 3 on the RFD21733 Module or RFD21743 RFD21732 RFDANT to go high for the duration the button is pressed when in one of the 4 switch modes If in Serial UART mode then you will receive 1 byte Rotatable Buttons bit unique ESN of the KEYFOB RFD21781 RFD21791 e representing which button is pressed or if RFID transmission and 4 more bytes indicating the 32 Pressing button 2 will cause the output 2 on the RFD21733 Module or RFD21743 RFD21732 RFDANT to go high for the duration the button is pressed when in one of the 4 switch modes If in Serial UART mode then you will receive 1 byte representing which button is pressed or if RFID transmission and 4 more bytes indicating the 32 bit unique ESN of the KEYFOB Free Applications Support Email your application questions to support rfdigital com O Copyright RF Digital E oe RFDP8 nd ba ii DIG ITAL RF Module RFDANT RFD21733 RFD21742 RoHS CE ESTI E RFD21735 RFD21743 RFD21733 FCC I
94. put 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 on the Eval Boards ONLY 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 If you are not using an Eval Board and you are using the RF Module or RFDANT on its own then you will need to add the 47k resistor yourself 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 therefore it will not 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 func
95. rents without concern for compliance approvals since modules such as the RFD21733 come with IC and FCC Approval and Certification 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 Free Applications Support Email your application questions to support rfdigital com 25 Copyright RF Di
96. rer part number is TTL 232R 3V3 and the Digikey Part Number is 768 1016 ND picture shown below For international orders if you want to save on shipping you can ask for this item to be packed in with your order to RF Digital Free Applications Support Email your application questions to support rfdigital com 22 RFDP8 RFDP8 Copyright RF Digital eS 7 10 2011 1 40 AM D G T Al ui roads oO R A T o N Patents Pending RFD21733 RFD21742 RoHS CE ESTI Un Gn 13715 Alton Pkwy Irvine CA 92618 Se ide dus RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs When using the FTDI USB Interface Cable TTL 232R 3V3 the connections to the RFD21737 RFD21738 RFD21739 RFD21772 RFD21773 Eval Boards are very simple You only need 4 wires and the Eval Board is also powered from the USB port through the cable The 3V3 part of the part number for the cable means that the logic levels of the cable are 3 3V IMPORTANT The RED wire supplies 5V and can ONLY be connected to the Eval Boards since the Eval Boards have an on board 3 3V regulator You can NOT connect 5V to the Module or RFDANT directly This is ONLY intended for the Eval Board The 4 wires you need from the cable are RED is 5V BLACK is GROUND YELLOW is TXD Data Input to the PC USB Port ORANGE is RXD Data Output from the PC USB Port FTDI Cable to RFD Eval Board
97. result in very bad range performance E M UT REDATTA SANTE HTA ij ANTEWHA AREA LE NO COPPER OM ANY LAYER IH THIS AREA NO PARTS OR COPPER NO PARTS OR COPPER E TET RFD21T33 121732 TiT31 dd ANTENNA AREA dier MO COPPER CH AMY Y LAYER IN THIS AREA Ronm amaran NS ANTENNA AREA ai NO COPPER CHANT LAYER IN THIS AREA NO PARTS OR COPPER NO PARTS OR COPPER B ye ERI nton E T Free Applications Support Email your application questions to support rfdigital com 71 Copyright RF Digital RFDPS8 RFDP8 ee ea D G I I AL RF Module REDANT g O A Mmmo RFD21733 RFD21742 oed 13715 Alton Pkwy Irvine CA 92618 rires els RFD21733 FCC IC GE RO C UIN e RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 13 The gray area shows where to keep free from copper and components These are multi module configurations Typical layouts for diversity applications where you will use multiple receivers transmitters or transceivers all on the same board to limit multipath impacts and increase effective communication range or provide a very solid coverage area with limited dead zones The distances shown are not optimal however just provided as reference Min LU OWES ON Viiv ALAN pera PEELE
98. rity When in UART mode the radio device remains in an active state with the radio enabled in receive mode If you are only using the module as a receiver you must terminate the TXD line with about a 47k pull up resistor to V so you do not leave a floating input which may cause unintentional transmissions by the module detecting Free Applications Support Email your application questions to support rfdigital com 33 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL ev rroa O R A T I O N Patents Pending RFD21733 RFD21742 RoHS CE e ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs anything other then a solid logic level on the TXD pin Note you can also pull it to ground using a 47k resistor to terminate it if you require but most applications will want to terminate by a pull up resistor if the pin is unused The Eval boards pull it to ground using a 47K resistor because the Eval boards are setup to work in 8 different modes if you are just using UART only you will want to pull it high rather then low There is a general purpose IO line in mode 2 and mode 3 which is called LOGIC IO This is a powerful feature which allows you to not only send serial data back and forth using the TXD and RXD but in addition you can
99. rove the range if you can add it Parts can be placed all over the rest of the board however if possible keep about a half inch distance from the one inch length ground area to the right of the module again only if possible Solid blue areas are solder side ground plane which can be used for user electronics as well as the module These are all optional configurations and only for reference The space in the ground plane helps provide some RF discontinuity for the module to have he best antenna pattern possible in this configuration the optimal space to have is greater then 1 2 inches but some space is better then no space BEST HE J FONT ara 1 INCH LENGTH RFO21733 21732 21731 1 ANTENNA AREA x ND COPPER ON ANY LAYER IN THIS AREA 1 GOOD RFC TA 21712 1 207321 ANTENNA AREA j NO COPPER ON ANY LAYER IM THIS AREA 1 Free Applications Support Email your application questions to support rfdigital com 69 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21731 RFD21732 RFD21733 Layout Examples 11 The gray area shows where to keep free fro
100. rs or transceivers all on the same board to limit multipath impacts and increase effective communication range or provide a very solid coverage area with limited dead zones The distances shown are not optimal however just provided as reference PA Hr y RF021733 21732 21723 ANTENNA AREA i 5 NO COPPER ON ANY LAYER IN THIS AREA I S VEY VNNELNY ETE ET 1 INCH LEN 3734 1 1 INCH LEN FAM Free Applications Support Email your application questions to support rfdigital com EN 37 EN FAR 1 INCH L RFD21722 1 21722 1 ANTE L m Le T S 73 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0008 www RFdigital com Fast Answers support rfdigital com F DIGITAL RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs RFD21734 and RFD21735 Layout Examples 15 The gray area shows where to keep free from copper and components The RFD21734 and RFD21735 require the use of an external antenna and therefore the most common connector used for this is an SMA and the examples below show a typical SMA connector footprint interface PCB thickness is 0 031 inch to 0 062 inch double sided The blue color shows ground plane under the module on the solder side of the b
101. s RED connect to RFD Eval Board Pin 2 and Pin 3 Pin 2 is power on Short pin 2 and pin 3 BLACK connect to RFD Eval Board Pin 1 YELLOW connect to RFD Eval Board Pin 11 which is the RXD Data Output of the Eval Board ORANGE connect to RFD Eval Board Pin 12 which is the TXD Data Input of the Eval Board FTDI TTL 232R 3V3 USB Cable FTDI TTL 232R 3V3 USB Cable wired to RFD Eval Board Free Applications Support Email your application questions to support rfdigital com 23 Copyright RF Digital 7 10 2011 1 40 AM RFDP8 RFDP8 DIGITAL ensue rroa O R A T i O N Patents Pending RFD21733 RFD21742 RoHS CE e ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs Free Schematic Layout and Application Design Reviews For free Application Schematic and Layout design reviews send color screen captures or PDFs of your schematic and layout to support rfdigital com RF Digital s Support and Application Engineers are ready to get your wireless application running today Why spend lots of time reading volumes of data Instead simply send your application questions to support rfdigital com and receive direct fast and personal answers focused on your specific project and needs We look forward to hearing from you FCC Complian
102. ses 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 In order to maintain compliance with FCC regulations shielded cables must be used with this equipment Operation with non approved equipment or unshielded cables is likely to result in interference to radio and TV reception The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the user s authority to operate this equipment Free Applications Support Email your application questions to support rfdigital com 48 Copyright RF Digital F DE DP 7 10 2011 1 40 AM DIGITAI Patents Pending Dm RoHS CE ESTI RFD21735 RED21733 FCC IC 13715 Alton Pkwy Irvine CA 9261
103. space constraint only FCC ID may be displayed on the unit In such cases the compliance statement will have to be included in the user s manual NOTE Device must be smaller than a man s palm If the unit also interfaces with phone line it requires additional information on the label refer to part 68 information Free Applications Support Email your application questions to support rfdigital com 47 O Copyright RF Digital A RFDP8 RFDP8 DIGITAL kme roar wee M RFD21733 RFD21742 RoHS CE ESTI RFD21735 RFD21743 RFD21733 FCC IC 13715 Alton Pkwy e Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs SAMPLE FCC STATEMENT TO BE INCLUDED IN USER S MANUAL Relating to Model Number R24 RFD Stock Code RFD21733 INSTRUCTION TO THE USER if device DOES NOT contain a digital device The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate this equipment INSTRUCTION TO THE USER if device contains a digital device 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 u
104. t rfdigital com 38 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE ESTI RFD21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 RFD21743 FCC Tel 949 610 0008 www RFdigital com Approved amp Certified Fast Answers support rfdigital com RFDP8 RF Module RFD21733 RFD21735 RFD21737 RFD21738 RFD21739 RFDP8 RFDANT RFD21742 RFD21743 RFD21772 RFD21773 KEYFOBs The following timing diagrams show the operation of a logic transmitter and a logic receiver with the different hang time options In the first diagram the logic transmitter s inputs are all asserted and then sequentially de asserted There is a small delay between the transmitter input going high and the corresponding output on the receiver going high due to the time required to transmit over the air Note that when the last input on the transmitter is de asserted there is a 500ms delay before the receiver de asserts its last output Input 3 Input 2 Input 1 Time Output 3 Output 2 Output 1 The second diagram shows the same operation at the transmitter but with the receiver configured with a 20ms hang time Note that shortly after the last input is de asserted the receiver updates its output state to turn off all outputs Input 3 Input Z2 Input 1 Time Output 3 Output 2 Output 1 NURSES NENNEN PE oaa PPP PA NM O 100 200 300 400ms di EE CE FEM RARES MAPA NEN par EPA Communication
105. te often capacitors are used in parallel with the CR2032 to help limit the amount of peak current the CR2032 is exposed to so as to help it have a longer run time since the CR2032 does not handle peak current very well over long durations of time We recommend if you choose to place bypass capacitors tied to the CR2032 for this purpose then do testing to compare if they really provide you a benefit or not Quite often the leakage current of the capacitors are so high that they will have negative impact on the battery runtime rather then provide an advantage At least if you have the room place the pads but before you place the caps for production do testing to make sure they are really helping and not reducing your runtime Mode Pins The mode pins are read just once right after the Module or RFDANT comes out of reset or upon power up If you change them and want them to be read again then do a reset or power down and up again Mode Select 0 Mode Select 1 and Modes Select 2 are three binary inputs which are to be terminated either high or low they must not be left open at any time Mode Select 2 and 1 are open and high Z inputs so you can use a 47k resistor to pull them up or down or you can connect directly to V or GND The Mode Select 0 has an internal 13k internal switched pull down At power up or when the module comes out of reset it will internally apply a 13k pull down on this pin just for an instant to check if it is high or not
106. tion questions to support rfdigital com Copyright RF Digital 7 10 2011 1 40 AM DIGITAI R Le R A T I oO N RoHS CE ESTI RFD21733 RFD21742 RFD21735 RFD21743 RFD21733 FCC IC cdo Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 HIGH ZER GAIN LOS LOS No RF ai E Ultra Long e p Ultra Long Knoledge g EF o Range edge p Eo __ Range N Ng space inside ous EN A 0 j XCELL INT XCELL NT ANTE bh IM Wu ANTENNA WWW REDIGITAL COM WWW RFDIGBITAL COM Mating connectors for the 11 pin RFDANT can be found at Digikey in the USA at http www digikey com or at any other JST distributor They are standard connectors and you may use other manufacturers 1 Top Entry Through Hole Type 11 pos a Digikey P N 455 1666 ND b Manufacturer P N B11B ZR Side Entry Through Hole Type 11 pos Digikey P N 455 1678 ND Manufacturer P N S11B ZR Top Entry SMT Type 11 pos Digikey P N 455 1690 2 ND Manufacturer P N B11B ZR SM4 TF Side Entry SMT Type 11 pos Digikey P N 455 1701 2 ND Manufacturer P N S11B ZR SM4 TF Free Applications Support Email your application questions to 10 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified 13715 Alton Pkwy
107. tions like opening a garage door or with many units to form complex networks with multiple nodes Network Mode LEARN Pin Application Circuit Here is an example of how to wire up the LEARN pin to use NETWORK MODE This same example of the LEARN STATUS pin connection applies for Mode 3 Mode 5 and Mode 7 the only thing that changes are the mode settings of course This also applies to the RFDANT An optional buffer for the LED output is recommended for production designs Simply replace the LED with a FET to drive the LED for high drive currents Free Applications Support Email your application questions to support rfdigital com 26 Copyright RF Digital RFDP8 RFDP8 A 120 AN RF Module RFDANT Patents Pending RFD21733 RFD21742 R RoHS CE ESTI 19745 An ae CA RFD21735 RFD21743 RFD21733 FCC IC 5 Alton Pkwy Irvine CA 92618 RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs D1 LED R1 R2 1 220 OHM 220 OHM O O D 3 V STATUS LEARN R3 47 K RFD21733 U2 Mode 7 RFD21733 Top View GND M Mode Select GND 3 lt M1 gt 3V LEARN TX LED STATUS MO 43V IN1 OUT1 LOGIC IO FACTORY IN2 OUT2 RXD IN2 OUT2 TXD gt 3V GND If possible use a 470 ohm resistor or larger to allow for highest logic level on the LEARN input as possible due to the resistive divider that forms
108. u go to production for your battery runtime If you would like to use all or any one of the three switch inputs as button inputs then simply place a pull down resistor around 47k or smaller on the inputs which you will be connecting to a pushbutton so when you press the pushbutton the input will go high and when you release it the input will be pulled to ground by the 47k resistor The Reset Pin has a 3 3k Pull Up internal to the Module and RFDANT The Factory Pin has a 3 3k Pull Down internal to the Module and RFDANT There are no internal pull ups or pull downs on any other pins except for Mode Select 0 which has an internal 13k pull down temporarily applied when the device comes out of reset or after power up for about less then a millisecond All other pull downs or pull ups must be applied by you externally to the Module or RFDANT If you are using the RFD Eval Boards RFD21737 RFD21738 RFD21739 RFD21772 RFD21773 there are 47k pull downs on these Eval Boards see the Eval Board Schematic for reference on Pull Downs and which Pins they on Always send screen captures of your schematics and layouts to support rfdigital com for review Free Applications Support Email your application questions to support rfdigital com 31 Copyright RF Digital RFDP8 RFDP8 Ed sir Re ed D I G T A a RF Module RFDANT RoHS CE ES Oo R A T I o N RFD21733 RFD21742 RED21733 FCC IC 13715 Alton Pkwy Irvine CA 92618 Eco RA RFD21743 FC
109. uipment 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 The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the user s authority to operate this equipment Free Applications Support Email your application questions to support rfdigital com 50 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending Au d 13715 Alton Pk Irvi CA 92618 RFD21733 FCC IC tod Addi coa RFD21737 RFD21772 RFD21743 FCC Tel 949 610 0008 www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs AAA RFDP8 RFDP8 D i G I I AL RF Module RFDANT R P Oo R A T i o N RFD21733 RFD21742 RFD21735 RFD21743 RoHS Declaration Of Conformity RF Digital declares that part numbers RFD21731 RFD21732 RFD21733 e RFD21734 e RFD21735 RFD21736 RFD21737 RFD21738 RFD21739 RFD21741 RFD21742 RFD21743 e RFD21764 RFD21772 RFD21773 are manufactured with RoHS materials Free Applications Support Email your application questions to support rfdigital com 51 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RoHS CE e ESTI RFD21733 FCC IC RFD21743 FCC Approved amp Certified F DIGITAL 13715 Alton Pkwy Irvine CA 92618 Tel 949 610 0
110. ur application questions to support rfdigital com 13 Copyright RF Digital 7 10 2011 1 40 AM Patents Pending RFD21733 RFD21742 RoHS CE ESTI uc ni 13715 Alton Pkwy Irvine CA 92618 Se ide dus RFD21743 FCC Tel 949 610 0008 o www RFdigital com RFD21738 RFD21773 Approved amp Certified Fast Answers support rfdigital com RFD21739 KEYFOBs DIGITAL co RFD21733 RFD21735 RFD21742 RFD21743 Usage Examples D GG tan MODULE or RFDANT Unlimited number of nodes and configurations with and without network mode O O 0 0 O 0O RFD21733 RFD21735 RFD21742 RFD21743 Applications MODE 2 MODE 2 Bidirectional serial V V Bidirectional serial transceiver normally sits in transceiver normally sits in receive mode receiving and receive mode receiving and outputting serial bytes out of I WIL RxD our TXD IN I ALII outputting serial bytes out of we the RXD pin as they come the RXD pin as they come ra in When user sends data seen ier RFD21733 QG RFo21733 SEE in When user sends data into TXD pin it automatically ps RF teta into TXD pin it automatically switches to transmit FULL TXD IN RxD OUT gt NUI switches to transmit SERIAL i SERIAL TRANSCEIVER TRANSCEIVER MODE 3 V iy MODE 3 Bidirectional serial transceiver normally sits in receive mode receiving and outputting serial bytes out of TXD IN ULL the RXD pin as they co
111. will also need a regulator to drop from 5V down to 3V for the Module or RFDANT Simple 5V to 3V Logic Level Shifter for prototyping ONLY If you want a quick an dirty temporary solution to interface the 3V RF Module or RFDANT to your 5V logic circuit then you can use a simple resistive divider to get your prototype up and running quickly with just a couple resistors First you must supply a regulated 3V or 3 3V to the RF Module or RFDANT using a voltage regulator Now regarding the logic signals you can connect a 47k pull down resistor to the logic lines on the following 6 signals Mode Select 1 Mode Select 2 Learn Status INT OUT 1 LOGIC IO IN2 OUT2 RXD IN3 OUT3 TXD The RESET has an internal 3 3K pull up and does not apply to this option and the Mode Select 0 at power up has an internally switched 13k resistor and also does not apply to this option After connecting the 47k pull down resistor on the Module or RFDANT pins then use a 22k series resistor to connect the six Module or RFDANT logic pins mentioned above to your 5V device That will create a 2 3 voltage divider from your 5V device to the 3V RF Module or RFDANT when the 5V device is driving 3V device When the 3V device is driving the 5V device there is no divider in that direction only a 22k series resistor into a high Z input on the 5V side so the 5V side will see the full 3V logic and that is in most cases just enough to cause a logic high for a 5V logic input Note

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