This document introduces the RF600 Encoder/Decoder chipset for remote wireless systems using KEELOQ encryption. The RF600E encoder chip is used in wireless transmitters to encrypt and transmit data, while the RF600D decoder chip receives and decrypts the encoded signals. The chips support various modulation schemes and have features like learn/erase modes and serial data output for integration into wireless access control, tracking, and remote keyless entry applications.

1. RF Encoder / Decoder Chipset Source: RF Solution

2. Introduction Purpose This training module introduces the basic operation of RF600 Encoder / Decoder chipset. Outline KEELOQ ® Encryption RF600E Encoder RF600D Decoder Basic Operations Content 15 pages Duration 10 Minutes

3. KEELOQ ® Encryption The Microchip KEELOQ provides both access and security to wireless system. KEELOQ is based on an encryption algorithm that create a unique transmission on every use. KEELOQ applications: Remote keyless entry Electronic Door Locks & Access Control Employee Identification Highway toll collection Keyboard locks ... K EE L OQ CODE HOPPING

4. Overview of RF600 Encoder / Decoder Key Features Highly Secure KEELOQ 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 Optimum Range: AM up to 100m FM up to 200m IR up to 20m

5. Transmitter Encoder RF600E 2.0V - 6.6V operation Automatic battery level monitor ‘ Manchester’ modulation Low battery indications 8 pin DIP/SOIC package

6. RF600E Typical Application Circuit

7. Receiver Decoder RF600D 4.5V – 5.5V operation 4 digital outputs Asynchronous serial interface Up to 48 Transmitters can be Learned 18 pin DIP/SOIC package

8. RF600D Stand Alone Operation Application Circuit

9. RF600D Operation with an EEPROM Application Circuits

10. RF600E Data Output The RF600E uses a fully balance Manchester encoded data protocol. The data format includes a pre-amble, synchronization header, followed by the encrypted and fixed code data then a CRC check. The data packet size is 67 bit.

11. RF600D Serial Data Outputs The serial data received by RF600D from the RF600E encoder is checked for correct Manchester coding. Serial Data is sent as a stream of ASCII characters at 9.6K baud. The serial output data from RF600D consists of: 7 digit KEELOQ serial number KEELOQ button data and transmitter battery state A carriage return character and a line feed character Serial Data Format

12. KEELOQ Button Status ASCII Character S3 S2 S1 S0 KEELOQ Button KEELOQ Button with Low battery 0 0 0 1 A a 0 0 1 0 B b 0 0 1 1 C c 0 1 0 0 D d 0 1 0 1 E e 0 1 1 0 F f 0 1 1 1 G g 1 0 0 0 H h 1 0 0 1 I i 1 0 1 0 J j 1 0 1 1 K k 1 1 0 0 L l 1 1 0 1 M m 1 1 1 0 N n 1 1 1 1 O o

13. RF600D Learn / Erase Mode Learn Mode : is achieved by pulling this input to GND briefly. Erase Mode : is achieved by pulling this input to GND for more than 8 seconds. This causes the EEPROM to be erased of all pre-learnt RF600E encoders.

14. RF600 Evaluation Boards RFEVAL Key Features 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)

15. Additional Resource For ordering the RF600D/E devices, please click the part list or Call our sales hotline For additional inquires contact our technical service hotline For more product information go to http://www.rfsolutions.co.uk/acatalog/RF_Telemetry_Encryption_Chipset.html Newark Farnell