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rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D ? highly secure protocol ? rf encoder & decoder ic?s ? simple to us e ? stand alone operation ? achieves maximum range from rf modules ? 1 ? 4 switch options (15 states) ? decoder serial output ? led indication of transmission ? directly compatible with keeloq decoder ? easy learn feature of transmitters ? sleep mode ? up to 48 transmitters can be learned description the rf solutions rf600e, & RF600D are easy to use encoder and decoder i/c?s. they have been designed to achieve the maximum possible range from any radio / infra red trans mitter rec e iver s e t. unlike other encoder /decoder devices the rf600e/600d provide an unprecedented level of security which prevents copying or grabbing whist also obtaining optimum range from the transmitter and receiver. the devices are very easy to use and can be inserted directly into a circuit. the RF600D has an easy learn feature enabling it to learn up to 7 unique rf600e encoder devices in standalone mode or up to 48 encoder devices when used in conjunction with an external eeprom. these devices enable a simple but secure remote telemetry application whilst obtaining the maximum range from the radio set. ? optimum range: ? am up to 100m ? fm up to 200m ? ir up to 20m ? compatible with rf solutions sys t ems ty pical applications ? general purpose remote control ? automotive alarm systems ? gate and garage openers ? electronic door locks ? identity tokens ? burglar alarm systems encoder ? 2.0-6.6v operation r f 6 00d r f 600e 1 2 3 4 8 7 6 5 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 ? automatic battery level monitor ? ?manchester? modulation ? 8 pin dip/soic package decoder ? 18 pin dip/soic package ? 4 digital outputs (15 states) ? asynchronous serial interface ? 4.5v ? 5.5v operation ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 1
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D transmitter encoder rf600e operational description the rf600e is a simple device to use. as shown in the typical application circuits, it requires only the addition of input switches and rf circuitry for use as the transmitter in the end application. transmission is automatic without user intervention. the rf600e will wake up upon detecting a switch closur e and then delay approximately 6.5 ms for switch debounce. the encrypted or hopping code portion of the transmission will change every time a button is pressed, even if the same button is pushed again. achiev ing optimum range range is dependant on many factors including 1. rf power output 2. receiver sensitivity 3. antenna efficiency 4. local environmental conditions and any local interference 5. data type which is being transmitted. whilst items 1-4 are dependant on the system hardware design, item ?5? is equally important and often overlooked. given that there is a legal maximum power output wh ich can be transmitted, and a limit on the sensitivity of the receiver (usually constr ained by cost), and that the antenna can never achieve 0db loss (100% efficiency), then the data type is an important aspect of the design. the rf600e/d chipset use a fully balanced manches ter encoded data protocol designed for optimum use of the radio transmission path. the data format automatically includes a pre-ambl e, synchronisation header, followed by the encrypted and fixed code data then a crc check. the actual packet size is 67 bits. each transmission is followed by a guard period before another transmission can begin. the data encryption provides up to four billion changi ng code combinations and includes the function bits (based on which buttons were activated) along with other data and synchronizati on information that the decoder uses. manchester encoding the data enables the superhetrodyne receiver ?data slic er? to maintain efficiency for the duration of the data packet, (un like many other encoder/decoder system s) which results in reduced bit errors and therefore ensures maximum range. low battery indication the rf600e reads the battery stat us (voltage) on each operation. if the voltage is detected as being below 3.8 volts (typical) then a flag bit is transmi tted to the decoder where it is made available. custom versions custom versions of the rf600e / d chipset are ava ilable, programmed with a unique ?manufacturers key? which means that the transmitter and receiver will respond only to other devices with the same unique manufacturers key. this provides a bespoke remote chipset for oe m applications. please contact our sales department for further information. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 2
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D pin descriptions name pin number descrip tio n s 0 1 sw itch input 0 s 1 2 sw itch input 1 s 2 3 sw itch input 2 s 3 4 sw itch input 3 v s s 5 ground reference connection o p 6 data output l e d 7 cathode connection for directly driving led during transmission v c c 8 positive supply voltage connection s0-3 these are the switch inputs which when operated wake up the rf600e and cause transmission. they may be switched directly to vcc. transmission occu rs for the duration of the switch operation. vcc / vss the power supply needs to be a stable regulated voltage wi th <10mv ripple. note that in idle mode the transmitter current drain is typically only 100na. op data output, this is a standard cmos / ttl output that may be connected directly to the data input pin of the rf module. in the event that this represents a load to vcc t hen a buffer stage between the data output and the rf module will be required. led a direct led drive with internal current limit of typically 1 ma operates when the rf600e is transmitting. ty pical application circuit diagram for fm radio modules 8 7 6 5 r f 600e le d do gn d vc c 2 3 4 1 s1 s2 s3 s0 sw 1 se r i a l d a t a out p ut vc c sw 2 sw 3 sw 4 t r an sm i t le d 2k 2 10 k p u l l up re s i s t o r bc 8 4 8 r f t r an sm i t te r not that a circuit constructed using am radio m odules does not need to have transistor bc848, resistor 10k or 2k2 pull up resistor fitted. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 3
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D receiv e r decoder RF600D operational description the RF600D is simple to use. as shown in the typi cal application circuits, in the stand alone operation the RF600D has the capability to learn up to 7 unique rf 600e transmitters. with the addition of an eeprom memory device this is increased to 48 rf600e encoders. the RF600D requires only the addition of the following components 1. a ?learn? sw itch which is used in the process of lear ning a transmitter/encoder to the decoder and also to initiate erasure of encoder information. 2. an led which indicates the status of the learn proc ess, the erase process and also data reception status. 3. an option link resistor which allows configuration for am or fm data reception. (data mark selection). 4. an option link resistor which allows selection of 4 mo mentary or 4 latched outputs. this input may simply be tied to vcc or gnd to fix the output operation. the RF600D may operate with an external 96c76 eeprom device as additional memory to store identity information of transmitter/encoders. data stored with in the eeprom is encrypted to maintain security. each RF600D+eeprom combination can l earn up to 48 unique transmitter/encoders. the RF600D is connected directly to the data output of a radio receiver module and upon detection of a valid data packet it will decode the keeloq encrypt ed data stream. when an address match occurs the RF600D asserts its 4 digital outputs. these will match the state of the rf600e enc oder?s 4 digital inputs at the time of transmission. an additional output, which shows the status of the encoder battery, is also asserted. the digital outputs may be configured as latching or momentary action. (latch = the output will change state on each successive transmit of the encoder. mom entary = the output will only operate for as long as the rf600e encoder is transmitting). eeprom storage when the RF600D is used in its internal eeprom mode it can learn the identity of up to 7 transmitters. if required, an external 96c76 eeprom can be connected as shown below and this will be automatically detected by the device and will allow the decoder to learn the identity of up to 48 transmitters. serial data output the RF600D has a serial data output. this outputs t he serial number, button and battery status of the transmitter encoder (rf600e) it has succe ssfully received. it also gives an indication of which inputs of the encoder have been activated and the stat us of the encoder battery. this data may be fed directly to a microcontroller or rs232 type driver circuit which ma y then be fed directly to a pc serial port. (an rs232 serial data output is provided on sa123 & rfeval2). serial data is output continually whilst data is being re ceived from the rf600e transmitter. i.e. this output is valid regardless of whether the rf600e encoder has been learnt to the RF600D decoder or not. if the user requires the serial number of pre-learnt rf600e encoders only, then t he serial output should be configured only to output data when one of the digita l outputs from the RF600D is asserted. (digital outputs from the rf600e will only activate when a rf600e encoder has been pre-learnt.) the data received by RF600D (from the rf600e encoder) is checked for correct manchester coding (it is not keeloq decrypted) and the following dat a is output from the sd1 pin. ? the 7 digit keeloq serial number. ? the keeloq button data and transmitter battery state. ? a carriage return character and a line feed character. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 4
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D serial data form a t serial data is sent as a stream of ascii characters at 9.6k baud. t he character format is 8 data bits with 1 stop bit, no parity. a serial data string is output every time a valid tr ansmitter packet is received. due to the nature of the keeloq packet there will be a min gap betw een each serial data string of 150msec. 10 characters are sent with the following format; o u t p ut f r om s d 1 pi n 7 6 5 4 3 2 1 a ( a) $ 0 d $ 0 a li n e f e ed (l a s t c h arac t e r ) c a rr i a g e re t u rn t r a n s m i t ter button i n fo r m a t i o n w i th b a tt e r y s t atus t r a n s m i t ter s e r i al nu m ber 1 0 by t e s of da t a tr ans m i tt e d the transmitter serial number : is made up of 7 ascii characte rs from the following group: 0 1 2 3 4 5 6 7 8 9 a b c d e f. the most significant seri al number digit is transmi tted first. this provides a total of 28million possible serial numbers. the keeloq button status is transmitted as an ascii c haracter in the range a to o or if the low battery bit is asserted (encoder battery is low) then in t he range a to o. keeloq data bits s0, s1, s2 and s3 then make up the ascii byte least significant bits d0, d1, d2 and d3. if a single encoder button is pressed, say s0, then c haracter a will be sent (or if low battery, a). if encoder button s1 is pressed then b (or b) will be sent. if s0 and s1 are both pressed simultaneously then character c (or c) will be sent. if all keeloq encoder buttons are simultaneously pre ssed then character o (or o) will be sent. examination of the ascii bit patterns shows that this allows single or multiple encoder button presses to be decoded by the ascii receiving device. examples of serial data output: for a three button keyfob with serial number 2345678, the serial data output when encoder transmission is decoded would be as follows: if s1 is pressed: 2345678a (2345678a if the batte ry voltage in the transmitter is low) if s2 is pressed: 2345678b (2345678b if the batte ry voltage in the transmitter is low) if s1 and s2 are pressed together: 2345678c (2345678c if the battery voltage in the transmitter is low) if s4 is pressed: 2345678h (2345678h if the batte ry voltage in the transmitter is low) ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 5
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D pin descriptions pin number name input / output? descrip tio n 1 op3 out data output 3 (s2) 2 op4 out data output 4 (s3) 3 lb out low battery, goes low when low battery valid 4 vcc in positive supply voltage connection 5 vss in connect to gnd 6 ecs out connects to eeprom ?cs? pin 7 eclk out connects to eeprom ?clk? pin. also sets data mark. 8 edat in / out connects to eeprom ?data? pin 9 in in rf / ir data input 10 lrn in learn / erase switch input & status led drive 11 sd1 out serial data output 12 lkin in option link input for momentary or latched outputs 13 sleep in high = run, low = sleep mode 14 vcc in positive supply voltage connection 15 unused n / a n o c o n n e c t i o n 16 unused n / a n o c o n n e c t i o n 17 op1 out data output 1 (s0) 18 op2 out data output 2 (s1) vcc / vss the power supply needs to be a stable regulated voltage with <10mv ripple op1-4 digital data outputs 1-4. these outputs are assert ed low when the relevant inputs (s0 ? s3) on the rf600e are asserted. (see latch/unl atch information under ?lkin?). lb the rf600e automatically measures the battery volt age each time it is operated (see rf600e data). this information is transmitted to the RF600D and if a low ba ttery condition exists then the low battery output is taken low. this indication is latched until data from a decoder with a good battery is received at which time the output indication is cleared. (output goes high). ecs / eclk / edat these connections are for interface to the eeprom, wh ich is used to store the identity of the encoders taught to the system. eclk am / fm selection note that the eclk output to the eeprom is also us ed for data mark selection. the data mark input sets the input of the RF600D to be compatible with am or fm radio modulation. when the ecs control line is low (i.e. when the eeprom is not selected) the eclk line is made an input and a check is made for the presence of a pull-down or pull-up resistor. if the data mark selection is pull-down then the rf 600d will be set to receive sync low am data. if the data mark selection is pull-up then the RF600D will be set to receive sync high fm and ir data. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 6
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D in this is the data input to the decoder, it may be connected directly to the rf receiv er module or ir receiver module. lrn this input is used to set the decoder module to ?lear n mode? and for the ?erase function? and is also used to drive the status led. learn mode : is achieved by pulling this input to gnd briefly erase mode : is achieved by pulling this input to gnd fo r >8 seconds. this causes the eeprom to be erased of all pre-learnt rf600e encoders. learn operation using momentary push sw itch (as application circuit) 1. press briefly and release the learn switch 2. the status led will illuminate while the sw itch is pressed and remain on when released. 3. operate the transmitter encoder once, status led on the decoder will extinguish 4. operate the transmitter encoder a second time, status led on the decoder will flash 5. after the status led has st opped flashing the transmitter has been successfully taught to the decoder 6. this transmitter will now operate the system up to 7 unique encoders may be learnt to each rf 600d. this can be extended to 48 encoders with the us e of the 93c76 eeprom. erase operation using momentary push sw itch (as application circuit) to completely erase all transmitter data, press and hold the learn switch on the decoder for 8 seconds. the status led will illuminate continuously whilst the switch is held down and then flash while the decoder erases all memory. it may take seve ral seconds until the erase function is complete. after the status led is extinguished all the encoder identities ar e erased from the decoders eeprom memory. sd1 outputs serial ascii data after each valid transmitter si gnal. (see previous section for more information) lkin this high impedance input is used to set the di gital outputs to momentary or latched actions lkin status digital outputs function h i g h l a t c h i n g l o w m o m e n t a r y momentary : output is only asserted for the duration of the valid transmit signal. latching : output state is changed on each valid transmitted signal. nb the outputs s0 ? s3 can only be operated afte r a rf600e encoder has been learnt to the RF600D decoder. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 7
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D sleep holding this pin high will causes the device to run norma lly. holding this pin low will causes the device to enter a sleep mode where the current drain will be 1 a (typically). taking the pin high will cause the device to run normally. grounding the learn/led pin (10) will cause the device to wake from sleep and service either a learn or erase request: on completion of the functi on the device will re-enter sleep mode. note that while in sleep mode the s0 ? s4 and low battery outputs will held high. notes to obtain minimal current consumption sleep/run applications will require close attention to exte rnal circuitry in order to minimise the sleep current and allow a typical circuit draw of 1 a at +5 volts (with/without optional external eeprom). with reference to the application schem atic, the following should be noted; 1. fit an additional 2.2m ? resistor from pin 10 to +5 volts. 2. fit an additional 2.2m ? resistor from pin 3 to +5 volts. 3. connect controlling drive to pin 13: high for run and low for sleep. 4. the s0 ? s4 and low battery outputs are not a sserted during sleep and will have to be sampled by the controlling micro controller during run mode. 5. the s0 ? s4 and low battery led?s are not requi red as part of the circuit and can be omitted of required. 6. incoming data mark selection on pin 7 must be by a resistor (typically 22k) to either +5 or ground and not by a direct connection. 7. the rf/ir data input (pin 9) must be at a valid logi c level at all times. in sleep mode, if this input is allowed to float then significant device current may flow. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 8
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D RF600D application circuit ? stand alone operation 5 7 9 4 3 r f 600d 17 14 13 12 11 10 2 1 18 op 3 op 4 gn d ec l k in op 1 vc c s l eep lk i n sd 1 lr n op 2 lb vc c 1k ? 1k ? le a r n sw i t c h op t i o n link se r i a l d a ta out p ut vc c o/ p 1 o/p 2 o/p 3 o/p 4 t r a n s m i tte r lo w b a t t e r y st a t u s le d 22 k ? fm / i r am 22 k ? fi t o n e r e si st o r o n l y l m rf re c e i v e r 15 k ? vc c this circuit prov ides a complete decoding solution capable of learning up to 7 unique encoders ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 9
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D RF600D application circuit ? with external eeprom 5 7 9 4 3 r f 60 0d 17 14 13 12 11 10 2 1 18 op 3 op 4 gn d ec l k op 1 vc c s l eep lk i n sd 1 lr n op2 lb vc c 1k ? 1k ? l ear n sw i t c h op t i on link se r i a l d a t a ou t put vc c o/ p 1 o/p 2 o/p 3 o/ p 4 t r an smi t t e r low b a t t e r y st a t u s le d 22k ? fm / i r am 22k ? fi t o n e r esi st o r o n l y l m rf r e c e i v e r 15k ? vc c 8 ee pr o m 93c 7 6 vcc 2 3 4 1 clk di do cs 5 gn d ec s 6 ed a t 8 vc c in this circuit prov ides a complete decoding solution capable of learning up to 48 unique encoders a complete ?ready to operate? board us ing this circuit is available pleas e see sa123 later in this datasheet ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 10
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D technical specifications: absolute maximum ratings item rating units supply voltage -0.3 to 6.9 v input voltage -0.3 to vdd + 0.3 v output voltage -0.3 to vdd+ 0.3 v max output current 25 ma storage temperature -55 to + 125 c (note) lead soldering temp 300 c (note) esd rating 4000 v note : stresses above those listed under ?absolute maximum ratings? may cause permanent damage to the device. rf600e transmitter encoder electrical ch aracteristics m i n t y pic a l ma x u n i t operating current(avg) vdd = 2 - 3v vdd = 3 - 6.6v 0.3 0.7 1.2 1.6 ma standby current 0 . 1 1 . 0 a high level input voltage 0.55v dd v dd +0.3 v low level input voltage 0.3 0.15v dd v high level output voltage 0.7v dd v low level output voltage 0.08v dd v led sink current 0.15 1 . 0 4 . 0 m a RF600D receiv e r decoder electrical ch aracteristics m i n t y pic a l ma x u n i t operating current(avg) vdd = 3v vdd = 5v 1 . 8 3 . 3 m a standby current 1 . 8 3 . 3 a high level input voltage .45 vdd v d d v low level input voltage vss . 2 v s s v high level output voltage vdd-0.7 v low level output voltage 0 . 6 v output pin current rating 1 . 0 m a led sink current 2 m a momentary output min t i me of operation 3 5 0 m s rf600e / 600d sy stem characteristics electrical ch aracteristics m i n t y pic a l ma x u n i t t i me from rf600e input operation to RF600D output asserted 1 3 5 2 1 0 m s t i me from rf600e input released to RF600D output released 1 4 0 2 1 0 3 0 0 m s ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 11
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D ordering information part number description package rf600e encoder ic 8pin pdip rf600e-so encoder ic 8pin so-8 RF600Dr6 decoder ic 18pin pdip RF600Dr6-so decoder ic 18pin so-8 RF600D8r6 decoder ic serial output only 8pin pdip RF600D-so8r6 decoder ic serial output only 8pin so-8 RF600Dp8 / RF600Ds8 the decoder is available as a miniature 8 pin vers ion option providing a serial data output only. these devices are designed for small space applicat ions requiring a low cost solution. sd nc v dd in r f 60 0d 8 r f 60 0d 8 p i n v e rs i o n 8 7 6 5 md nc v ss 2 3 4 1 nc pin descriptions pin number name input / output? descrip tio n 1 vcc in positive supply voltage connection 2 sd out serial data output 3 nc - n o c o n n e c t i o n 4 in in rf / ir data input 5 nc - n o c o n n e c t i o n 6 ms input mark select for fm / ir connect to vcc for am connect to gnd 7 nc - n o c o n n e c t i o n 8 vss in connect to gnd ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 12
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 13
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 14
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 15
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D r. f. solutions ltd., unit 21, cliffe industrial estate, lewes, e sussex, bn8 6jl, england tel +44 (0)1273 898 000 fax +44 (0)1273 480 661 email sales@rfsolutions.co.uk http://www.rfsolutions.co.uk r f solutions is a m e m ber of the low power radio association. all trademarks acknow ledged and remain the property of the respected ow ners. inf o r m ati on contai ned i n thi s document i s bel i e v ed to be accur a te, how ev er no r e pr esentati o n or w a r r a nty i s g i v en and r . f. sol u tio n s l t d . a ssu m e s n o lia b ility w i th re sp e c t to th e a ccu ra cy o f su ch i n f o r m ati on. u s e of r . f. sol u ti ons as cr i t i c al components i n l i f e suppor t sy stems i s not author i sed ex cept w i th ex pr ess w r i tten appr o v a l f r om r . f.sol u ti ons ltd. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 16
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D rfeval evaluation kit ? remote telemetry evaluation ? am and fm & ir technology ? digital and rs232 serial data outputs ? hardware evaluation platform ? range testing ? target environment testing ? antenna evaluation ? uses rf600 encoder/decoder (keeloq) the rfeval2 / 3 are hardware development platforms designed to assist the engineer with the design of a remote telemetry application. this kit provides several projects. ea ch project utilises an ?off the shelf? transmitter encoder incorporating the rf600e. the rf eval receiver board use s the RF600D to perform rf / ir reception and decoding providing a variety of outputs. our aim with this evaluation kit is to assist the engi neer in achieving a remote telemetry application with; 1. optimum range (we expect you to achieve) a. am project upto 80m b. fm project upto 150m 2. design of simple integrated receiver decoder 3. minimal hardware costs for the receiver decoder rf eval2 contents list: i t e m p a r t n o d e s c r i p t i o n qty 1 am-110c3-433 pocket keyfob transmitter433mhz, 3 switch 1 2 1 0 2 c 4 - 4 3 3 f transmitter/encoder 433. 92mhz, hand held, 4 switch 1 3 sa123 rfeval2 receiver decoder assembly 1 4 am-hrr3-433 receiver 'hybrid' module am 433mhz, sil 1 5 am-rrs3-433 receiver 'hybrid' module super het, am 433mhz, sil 1 6 am-hirk-433 rx/decoder am superhet 433mhz sil hybrid5v keeloq 1 7 fm-rrfq1-433 fm receiver 433.92mhz 1 8 flexi-m4-433 ? wave antenna 1 9 p h c - m 4 - 4 3 3 helical a n t e n n a 1 1 0 b a t t - p p 3 pp3 b a t t e r y 1 all components required to complete the following projects are supplied. p r o j e c t t r a n s m i t t e r receiv e r o u t p u t s r a n g e 1 a m - 1 1 0 c 3 - 4 3 3 a m - h i r k b - 4 3 3 d i g i t a l 1 0 0 m 2 am-110c3-433 am-hrr3-433 digital & rs232 40m 2 am-110c3-433 am-rrs3-433 digital & rs232 100m 4 102c4-433f fm-rrfq1-433 digital & rs232 150m rfeval3 consists a receiver decoder board only with the RF600D, this requires the relevant rf receiver module and antenna to generate a complete receiver decoder (this is an RF600D design) contents list: i t e m p a r t n o d e s c r i p t i o n qty 1 sa123 telemetry receiver decoder board 1 2 b a t t - p p 3 pp3 b a t t e r y 1 ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 17
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D description the rfeval2 kit uses the rf600 chip set to impl ement the highly secure keeloq protocol and allows the user to experiment with this code hopping syst em. the kit is supplied primarily as a hardware development platform which obviates the need to cons truct hand-wired prototype boards which are rarely successful in creating a valid environment for the dev elopment of radio systems. the following projects can be undertaken with the kit and will allow the user to compare the performance of various transmitter/receiver combinations. 1. three button am fob / hirk-433 receiver decoder module. 2. three button am fob / am-rrs3-433 receiv er, RF600D decoder. serial and parallel outputs. 3. four button fm encoder with / fm-rtfq1- 433 / RF600D decoder. serial and parallel outputs. the rfeval2 evaluation board contains seven main areas of circuitry. the board allows the user to connect one of 3 am/fm receiver modules, or an ir receiver device, to an RF600D decoder subsystem. the output of the subsystem is connected to 5 led? s which are used to display the data outputs of the radio or ir transmitter encoder (which is used to actuate the system). a serial output at rs232 levels is also generated. it is also possible to experiment with an hirk radio receiver/decoder module and this has its own set of led?s to show t he status of its outputs. a number of points on the circuit are brought out to test points to allow access to signals to assist in an understanding of how the various parts of the evaluation board function. the following shows the principal components in each of the circuit areas will serve to assist in understanding the potential of the eval uation board as a development tool. rf input area consisting of one of four receiver modules. fm rrfq1. (m3) am hrr3 / rrs3 (m4) rf600 decoder subsystem. RF600D decoder chip. (u1) eeprom memory 96c76. (u2) learn switch. (sw1) learn led. (led1) alternately the RF600D8 decoder can be fitted in pl ace of the RF600D device. this decoder outputs a serial data stream for any keeloq decoder from which it receives data without the requirement to first learn the identity of the encoder. digital output area. RF600D output data led?s: (led2 ? led5) RF600D low battery led: (led6) infra red input. opto schmitt detector/demodulator is436. (u3) serial data output area. max232a ttl ? rs232 level converter. (u4) 9 way ?d? connector. (j1) ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 18
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D hirk decoder area. am-hirk-433 receiver/decoder module. (m5) learn switch. (sw2) learn led. (led7) data led?s. (led8, 9, 10) power supply area. 5 volt regulator. ( u 5 ) supply indicator (led11) the radio keyfob is a standard r. f. solutions am-110c3-433 keyfob which contains an rf600e encoder chip and also an am radio transmitter circuit. three pus h buttons allow the user to send commands to the rfeval2 board where the signals will be received and decoded. the rfeval2 board is supplied with a circuit diagr am and also a parts list and can be used for a wide range of development tasks including the following. remote switching - software and hardware sy stems can be simply prototyped and tested. range and environment testing - these initial stages of project design can be carried out and valuable results obtained without the expens e of pcb design and procurement. solve the great am/fm question - the low cost of am modules must be balanced with their lower performance when compared to fm and accurate compar isons of performance can be carried out with this board. aerial test - the transmitter board has provision for both am and fm modules and can be fitted with helical stub and 1/4 wave whip aerials, thus allowing m odule and aerial performance to be tested and optimised. rf input circuit. the rf input stage of the rfeval2 board can be implem ented using either a radio receiver module or alternately using the composite hybr id receiver / decoder hirk module. the can accept up to 3 radio modules and each modul e has an associated pair of option links. one of these couples the +5 volt supply to the module and t he other allows for the connection of the ?data out? signal to the decoder ic. the need for a +5 volt opt ion link may not be immediately apparent but most radio receivers are in practice tr ansmitters as well and radiate from t heir local oscillator stage. if these signals are picked up by a nearby rece iver then they may well cause dist ortion of incoming ?real? signals or in extreme cases my completely prevent operation of the receiver. the four modules which may be fitted to the board are as follows. fm-rrfq1 fm module (m3) which receives signals from a compatible fm transmitter module such as the fm-rtfq1. operation is possible at data rates up to 4.8kbps and at distances up to 250 metres over open ground. am-hrr3 am module (m4) which receives signals from a compatible am transmitter module such as the am-rt4 or am-rt5. these modules will operate at up to 4 kbps and over a range of up to 500 metres. the super-regenerative circuit used, results in a low cost device with adequate performance for many short range applications. note that this module posit ion will accept rrs3 modules which utilise a superhet circuit to give improved perform ance and range over the hrr3 devices. irrespective of how many modules are fitted, it w ill be necessary to connect the +5 volt and data lines of one module using the link options filed on the pcb. it is important that only one pair of links be made at ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 19
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D any one time to prevent inter-module interference and al so to prevent damage to the ?data out? signal pins on the modules. the following table gives the link option fitment for each module. module reference links to make r5. (m2) lk3, 4 rrfq1. (m3) lk5, 6 hrr3 (m4) lk7, 8 rf600 decoder circuit. the rf600 decoder stage of the rfeval2 board is im plemented using the RF600D chip. this device offers a complete ?system on a chip? solution to radio data reception, keeloq decoding and non volatile memory handling. examination of the circuit diagram and layout reveals that u1 , the RF600D device, is an 18 pin part which can be either in a dil or a surf ace mount package. the associated 4 mhz resonator (x1) provides a timing reference for the RF600D. a 93c76 eeprom memory provides 512x16 bits of non volatile memory which is used to store data on t he encoders (up to 50) which have been ?learned? by the system. also in this circuit area can be seen a ?l earn? switch (sw1) and an led (led1) and these parts are used to control and indicate progress of both encoder learning and also data erasure. option link fields are provided for a number of functions: opt1 allows the selection of radio data or ir data. opt2 allows the selection of latch or momentary mode for the data outputs. opt3 allows the selection of input data sync pulse ?mark?. note that where space is tight, a serial only version of the decoder - the rf600e is available in an 8 pin dil/so package. this device does not decode the keeloq stream but after verifying that the data packet is a true manchester encoded packet, extracts the encoder serial num ber and button status and outputs this as serial data. in applications where the high security level of keeloq encoding is not required, this device provides a simple solution to the problem of reading and verifying data from the noisy data output of a radio module. radio or ir data selection. the RF600D chip can decode signals from either the r adio modules or the ir receiver device and option field opt1 allows the selection of the desired input. input make opt1 link radio data rf ir data ir output function. the RF600D chip has 4 data outputs and these can oper ate as either all latched or all momentary. output mode make opt2 link latch all latch momentary all mom ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 20
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D input data mark. the data stream received by the RF600D chip may be in verted as it passes through the radio or ir path. when the bit stream is generated by the keeloq chip a 4 element sync pattern is inserted to allow the RF600D chip to detect the end of the ?01? run-in part of the stream and the start of the data. at the output terminal of the keeloq chip this 4 element sync pattern consists of 4 elements of data ?0? and if the radio or ir data path does not invert the data then we would s ee this 4 element pattern in the data stream at the input terminal of the RF600D chip. in this case we would say that the ?mark? of the incoming data is ?ve (low). if however the data path inve rts the data stream then we would see 4 elements of data ?1? and we would say that the data ?mark? is +ve (high). in order for the RF600D chip to be able to decode the in coming bit stream it has to know the mark of the incoming data and this is set on pin 8 of the device. this pin is normally used as an output to drive the clock line of the eeprom but when the eeprom is not se lected (cs is held low) then the state of this pin is not recognised by the device. if we now change th is pin on the RF600D to an input we can read the logic level of the pin and use this to set the incoming data mark. the mark setting is done on option link opt3 according to the following table. data mark data type make link +ve fm and ir +ve / fm -v e am -v e / am learn and erase. the learn switch serves to place the RF600D subsyste m into either learn mode or erase mode. the learn mode is used to initiate the process whereby t he subsystem learns the keeloq parameters of a new encoder device and places these into the eeprom . the erase mode is used to wipe all encoder parameters from the eeprom. to actuate the learn mode the learn-1 switch shoul d be briefly operated at which point the adjacent led will light up. a button on the encoder to be learned s hould now be operated briefly, causing the led on the evaluation board to extinguish. now re-operate t he same button on the encoder and the led on the evaluation board will flash on and off for several seconds indicating that the learn process is complete. up to 50 encoders can be learned by one decoder and if addi tional attempts are made to learn new encoders then each new learn process will over write the oldest learned data block. erasure of all learnt data can be carried out by pre ssing and holding down the learn-1 switch for at least 8 seconds. the led will be on when the button is down and will then flash when the switch is released, indicating that the eeprom is being erased. when the led is extinguished, all eeprom data will have been erased. serial data output as mentioned above, the RF600D subs ystem produces a serial data output which can be fed into another microcontroller or rs232 driver. the configuration of this output is fully documented earlier in this datasheet (sa123) digital output circuit. the data outputs from the RF600D chip consist of the following signals: 1. data outputs mirroring the 4 sw itch inputs on the rf600e chip. 2. the low battery flag from the rf600e chip. the data outputs from the RF600D are connected to four led?s such that switch inputs s0 ? s3 on the encoder have their state mirrored on led?s led2 ? led5. thus when encoder input s0 is taken high, led 2 will come on and the others will remain off. no te that the data outputs are made available on j5. the low battery output from the RF600D is connected to led 6 such that if the encoder battery level falls below 3.5 volts (typical) then the led will come on. this indication is true only for the duration of the transmission. note that the low batte ry output is made available on j5. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 21
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D infra red input circuit. the infra red (ir) input stage consists solely of the is436 ir detector device. this part is constructed in a 3 pin package with integral lens and acts as a detec tor and demodulator with schm itt trigger data slicer. if an ir encoder is activated and pointed at the detecto r then the output waveform will be of +ve mark and can be coupled to the RF600D subsystem by setting the i nput selector opt1, to ir and the mark selector opt3, to fm. serial data output circuit. the RF600D subsystem produces a serial data output at logic level which can be fed into another microcontroller or alternately it may be desirable to pass the data into a device which will accept rs232 level data. the serial data output circuit area consis ts of a max232a ttl ? rs232 level converter (u4) which converts the logic level serial data output from the RF600D into an rs232 level data stream. the data is output on the 9 way ?d? connector (j1) with data on pin 2 and ground reference on pin 5. note that the dsr line (pin 6 on j1) is held at rs232 high le vel and may be used to enable the receiving device. hirk decoder circuit. the hirk decoder system offers the designer a ?s ingle component? solution to am data reception and decoding. in many ways the features and operation of the decoder system are almost identical to those offered by the radio-module-plus-RF600D system de scribed above. indeed, operati on of the learn switch (learn-2) and associated led7 are identical to thos e of the RF600D subsystem.. the 3 data outputs on the hirk module are connected to led 8, 9 and 10 and t hese show the states of data inputs s0 ? s2 on the encoder rf600e chip. for a full description of t he function and application of this module please see datasheet ds097. pow e r supply circuit. the power supply for the board allows the use of an on-board pp3 battery plugged into connector j10. alternately an 8 ? 12 volt dc power source may be c onnected to j1 or a standard r. f. solutions power supply (as used with ?icepic? product) may be plugged into socket j5. note that only one power source should be connected at any one time. the dc input supply is regulated by the 78l08, 5 volt regulator (u5) and a power on indicator (led11) is provided to show the presence of the 5 volt supply. keeloq parameters. the RF600D and rf600e devices utilise the microc hip keeloq coding system to guarantee secure transfer of the data between the encoder and the dec oder. the coding parameters which are applied to the keeloq structure is as follows: modulation format: manchester coded baud rate: 400 us, short time out manufacturers code: r. f. solutions. long guard time: enabled. auto shut off timer: enabled. ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 22
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D ty pical application sa 1 2 3 rx d e c o d e r t x l o w b a tt e r y 4 d i g o / p ' s u p to 4 8 t r a n s m i t te r s configuring the outputs to operate w i th transmitter encoders the principle of operation is as previously described in the operation of the RF600D. note that the on board RF600D will only operate t he digital outputs of ?pre-learnt? transmitter encoders. upto 48 unique transmitters may be learn t. the serial output will be valid whenever a transmitter encoder is operated within range of the rf / ir receiver as long as the transmitter encoder has a matching manufacturers key. (f or a unique manufacturers key please contact our sales department) no ?pre-learning? of the transmitte r encoder is required for the serial data output. therefore if a serial output is required from a pre-learnt transmitter encoder the digital and serial outputs must be logically gated toget her (using a simple logic gate). using hy perterminal to v i ew the serial data the data can be viewed using any pc running windows hy perterminal using the following configuration. (assume com 1 is the port being used:) to start hyperterminal go to :- start > programs > accessories > communications > hyperterminal. selec t hypertrm.exe enter a name and select an icon. the ?connect to? dialog box should now be open. selec t ? d irect to com1? in the ?connect using? field and select ok. in the com1 properties dialog box set t he fields with the following parameters: bits per second: 9600 data bits: 8 parity: none stop bits: 1 flow control: none ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 23
rf / ir encoder / decoder chipset rf600e rf evaluation boards, RF600D selec t ok. hyperterminal is now configured correctly for use with the rf600e/RF600D chip set. application example : leisure centre access control a leisure centre uses an electric gate access c ontrol to its members. each leisure centre member is provided with a keyfob and when enteri ng the centre, uses the keyfob to open the gate. the sa123 is contained within the gatehouse and prov ides the serial data output of each keyfob accessing the system. this data is used by the leisure centre to provide information as to which member is entering the centre and at what time of day. technical specifications dimensions 174 x 106mm electrical characteristics min ty pical max units supply voltage 11.0 12.0 16 v supply current 25 ma time from encoder switch depress ed to decoder output 100 msecs time from encoder switch releas e to decoder output 300 msecs ordering information part number description rfeval2-315r1 evaluation kit including all components to operate 315mhz rfeval2-433r2 evaluation kit including all components to operate 433mhz rfeval3-r1 evaluation kit pcb assemvbly only (incl udes all circuitry except rf modules, antenna) psu12v1ain power supply unit 110-240vac input, 12v 1a output ** range stated is optimum, direct line of sight. in worst conditions this c an be reduced by over 50% ds600-9 sept ?04 ?2004 reg. no. 227 4001, england page 24

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