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ID: 5230
Case Type: faq
Category: Device Programming
Related To: ispVM Embedded
Family: MachXO2

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Deployment Tool: Why are the fields between '65' and '5F' different when having SVF file and generates .vme file twice?

The 0x65 is the FILE_CRC command (used for CRC-protected to prevent corrupted or modified VME file). The FILE_CRC should be followed by 2 bytes of the CRC value which includes the sum CRC of all the bytes in the rest of the file. Eventhough the data are exactly the same; the difference of the CREATION DATE between 2 files could cause the CRC value are not the same.