RF600D

RF / IR Encoder / Decoder Chipset RF Evaluation Boards,              Highly Secure Protocol RF Encoder & Decoder IC’s Simple to Use 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 Compatible with RF Solutions Systems Typical Applications       General Purpose Remote Control Automotive alarm systems Gate and garage openers Electronic door locks Identity tokens Burglar alarm systems Encoder     RF600E RF600D 2.0-6.6V operation Automatic Battery Level Monitor 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 transmitter receiver set. 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. ‘Manchester’ modulation 1 8 pin DIP/SOIC package 8 2 7 RF600E Decoder     3 6 4 5 18 pin DIP/SOIC package 4 Digital Outputs (15 States) Asynchronous serial interface 4.5V – 5.5V operation 1 18 2 17 3 16 4 15 5 DS600-12 Oct 12 ©2004 Reg. No. 227 4001, ENGLAND RF600D 14 6 13 7 12 8 11 9 10 Page 1 RF / IR Encoder / Decoder Chipset RF Evaluation Boards, RF600E 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 closure 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. Achieving 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 which can be transmitted, and a limit on the sensitivity of the receiver (usually constrained 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 Manchester encoded data protocol designed for optimum use of the radio transmission path. The data format automatically includes a pre-amble, 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 changing code combinations and includes the function bits (based on which buttons were activated) along with other data and synchronization information that the decoder uses. Manchester encoding the data enables the superhetrodyne receiver ‘data slicer’ to maintain efficiency for the duration of the data packet, (unlike many other encoder/decoder systems) which results in reduced bit errors and therefore ensures maximum range. Low Battery Indication The RF600E reads the battery status (voltage) on each operation. If the voltage is detected as being below 3.8 volts (typical) then a flag bit is transmitted to the decoder where it is made available. Custom Versions Custom versions of the RF600E / D chipset are available, 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 OEM applications. Please contact our sales department for further information. DS600-12 Oct 12 ©2004 Reg. No. 227 4001, ENGLAND Page 2 RF / IR Encoder / Decoder Chipset RF Evaluation Boards, RF600E RF600D Pin Descriptions Name Pin Number S0 S1 S2 S3 Vss OP 1 2 3 4 5 6 LED 7 Vcc 8 Description Switch input 0 Switch input 1 Switch input 2 Switch input 3 Ground reference connection Data output Cathode connection for directly driving LED during transmission 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 occurs for the duration of the switch operation. Vcc / Vss The power supply needs to be a stable regulated voltage with