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TB043

Download Application Note
Title
Title
KEELOQ® CRC Verification Routines
Name
Name
TB043
Date
Date
06/24/2015
Product Categories
Product Categories
8-bit MCU
Description
Description
All of the KEELOQ® Encoders share the same standard code word format composed of a basic set of 65 bits of information. Although, the Advanced Encoders (e.g. HCS360, HCS361) supplement that set with extra bits of information along with a pair of CRC bits (Cyclic Redundancy Check). This Technical Brief presents a routine in PICmicro ® microcontroller (MCU) assembly language that implements the CRC polynomial as used by Advanced KEELOQ Encoders and allows a KEELOQ receiver to verify the received code word.