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HCS412T Datenblatt(PDF) 33 Page - Microchip Technology |
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HCS412T Datenblatt(HTML) 33 Page - Microchip Technology |
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33 / 44 page ![]() © 2002 Microchip Technology Inc. Preliminary DS41099C-page 33 HCS412 FIGURE 6-3: SYNCHRONIZATION WINDOW FIGURE 6-4: BASIC OPERATION OF RECEIVER (DECODER) Note: Circled numbers indicate sequence of events. Blocked Entire Window rotates to eliminate use of previously used codes Single Operation Window Window (32K Codes) (16 Codes) Double Operation (resynchronization) Window (32K Codes) Stored Synchronization Counter Value Button Press Information EEPROM Array Manufacturer Code 32 Bits of Encrypted Data Serial Number Received Information Decrypted Synchronization Counter Check for Match Sync Counter Serial Number KEELOQ Decryption Algorithm 1 3 4 Check for Match 2 Perform Function Indicated by button press 5 Crypt Key |
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