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KEELOQ with XTEA microcontroller-based code hopping encoder

Posted: 06 Aug 2009 ?? ?Print Version ?Bookmark and Share

Keywords:KEELOQ? encoder? encryption? microcontroller?

This document describes the design of a microcontroller-based KEELOQ Hopping Encoder using the XTEA encryption algorithm. This encoder is implemented on the Microchip 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.

View the PDF document for more information.

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