Transcription of CRC Generating and Checking - Microchip Technology
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CRC Generating and Checking - Microchip Technology
2000 Microchip Technology 1AN730 INTRODUCTIONThis application note describes the Cyclic RedundancyCheck (CRC) theory and implementation. The CRCcheck is used to detect errors in a message. Two imple-mentations are shown: Table driven CRC calculation Loop driven CRC calculationThis application describes the implementation of theCRC-16 polynomial. However, there are several for-mats for the implementation of CRC such asCRC-CCITT, CRC-32 or other is a common method for detecting errors in trans-mitted messages or stored data.
DS00730A-page 4 Preliminary 2000 Microchip Technology Inc. LOOP DRIVEN CRC IMPLEMENTATION This section describes the loop driven CRC implemen-tation. This implementation is derived from the hard-ware implementation shown in Figure 1. The program for the loop driven CRC generation and CRC checking is shown in Appendix A. CRC Generation
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