资料介绍
All K EEL OQ Encoders use a common code word format.
They all pack the bits of information in the same num-
ber and position in the transmission sequence. While
all the encoders offer a basic Pulse-Width Modulation
(PWM) method to produce a signal that is suitable for
radio transmission, many Advanced K EELOQ Encoders
(HCS360 and higher) offer alternative methods. One
such alternative method is Manchester encoding. This
Technical Brief shows PIC
®
microcontrollers (MCUs)
assembly routines to receive Manchester encoded
transmissions. TB045
KEELOQ Manchester Encoding Receive Routines
A Manchester encoded signal contains frequent level
Authors: Lucio Di Jasio transitions which allow the receiver to extract the clock
Microchip Technology Inc. signal easily and reliably. The penalty for introducing
frequent transitions, is that the Manchester coded sig-
nal consumes more bandwidth than the original signal
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