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MCU-based hopping encoder

Posted: 16 Apr 2009     Print Version  Bookmark and Share

Keywords:microcontroller  KEELOQ Hopping Encoder  PIC16F636 

This application note by Microchip describes the design of a microcontroller-based KEELOQ Hopping Encoder. This encoder is implemented on PIC16F636 microcontroller. A description of the encoding process, the encoding hardware and description of the software modules are included within this application note. The software was designed to emulate an HCS365 dual encoder. As it is, this design can be used to implement a secure system transmitter that will have the flexibility to be designed into various types of KEELOQ receiver/ decoders.

The software used in this implementation makes use of the PIC16F636 internal encryption engine to generate the hopping codes required for transmission.

View the PDF document for more information.

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