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HCS362 Datasheet(PDF) 9 Page - Microchip Technology |
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HCS362 Datasheet(HTML) 9 Page - Microchip Technology |
9 / 46 page © 2011 Microchip Technology Inc. DS40189E-page 9 HCS362 3.1 Transmission Modulation Format The HCS362 transmission is made up of several code words. Each code word starts with a preamble and a header, followed by the data (see Figure 3-1 and Figure 3-2). The code words are separated by a Guard Time that can be set to 0 ms, 6.4 ms, 25.6 ms or 76.8 ms with the Guard Time Select (GUARD[0..1]) configuration option. All other timing specifications for the modulation formats are based on a basic timing element (TE). This Timing Element can be set to 100 μs, 200 μs, 400 μs or 800 μs with the Baud Rate Select (BSEL[0..1]) configuration option. The Header Time can be set to 3TE or 10 TE with the Header Select (HEADER) Con- figuration option. There are two different modulation formats available on the HCS362 that can be set according to the Modula- tion Select (MOD) configuration option: • Pulse Width Modulation (PWM) • Manchester Encoding The various formats are shown in Figure 3-3 and Figure 3-4. FIGURE 3-2: CODE WORD TRANSMISSION SEQUENCE FIGURE 3-3: TRANSMISSION FORMAT (PWM) FIGURE 3-4: TRANSMISSION FORMAT (MANCHESTER) Header Encrypt Fixed Guard 1 CODE WORD Preamble Encrypt Preamble Header LOGIC "1" Guard Time 31 TE Encrypted Portion Fixed Code Portion LOGIC "0" Preamble 3-10 Header TE TE TE TE 1 16 TBP Guard Preamble Header Encrypted Fixed Code 1 2 START bit STOP bit Time Portion Portion 16 bit 0 bit 1 bit 2 LOGIC "0" LOGIC "1" TE TE TBP |
Similar Part No. - HCS362_11 |
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Similar Description - HCS362_11 |
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