megacode
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megacode [2014/12/28 19:23] – fix syntax kingkevin | megacode [2014/12/28 19:48] – restructure kingkevin | ||
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The [[http:// | The [[http:// | ||
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- | ===== transmitter ===== | ||
In [[https:// | In [[https:// | ||
+ | |||
+ | In [[https:// | ||
+ | |||
+ | ===== transmitter ===== | ||
==== ACT-34B ==== | ==== ACT-34B ==== | ||
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The PICkit2 programmer does support the PIC12F family because it's flash based. | The PICkit2 programmer does support the PIC12F family because it's flash based. | ||
But code and data protection were. | But code and data protection were. | ||
+ | |||
===== receiver ===== | ===== receiver ===== | ||
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- | In [[https:// | ||
==== MDR ==== | ==== MDR ==== | ||
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But code protection is probably used. | But code protection is probably used. | ||
This chip can also come as One Time Programmable, | This chip can also come as One Time Programmable, | ||
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+ | ===== protocol ===== | ||
+ | |||
+ | The MegaCode protocol is partially specified in the [[https:// | ||
+ | |||
+ | It uses Amplitude Modulation (AM) on 318MHz. | ||
+ | There are two levels: on and off. | ||
+ | The transmission uses 24 bit frames and 1 blank cell. | ||
+ | Each is 6 ms long. | ||
+ | Within each bit frame a 1 ms pulse is send. | ||
+ | The pulse is either in the first or second half within the bit frame (after 2 or 5 ms). | ||
+ | This defines if the bit is a 0 or 1. | ||
+ | The first bit frame is used as sync frame and is always a 1. | ||
+ | It is followed by 20 system code bits and 3 data bits. |
megacode.txt · Last modified: 2024/01/07 17:49 by 127.0.0.1