资料介绍
ll of the KEEL OQ 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 K EELOQ Encoders and allows a K EEL OQ
receiver to verify the received code word. TB043
KEELOQ CRC Verification Routines
Author: Lucio Di Jasio
PICmicro MCU IMPLEMENTATION
Microchip Technology Inc. The CRC calculation would be ideally done on the fly
by the same routine that is receiving the data from the
OVERVIEW radio input. Therefore, it would compute a new CRC
value as every data bit gets shifted in. After receiving
All of the KEELOQ Encoders share t
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