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CRC guides
Practical explanations of CRC concepts, parameter conventions, verification methods, and implementation details.
CRC guides
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Fundamentals
2 guidesParameters
4 guidesCRC parameters
CRC polynomial explained
Understand polynomial notation, implicit top bits, normal form, and reflected form.
7 min read
CRC parameters
CRC initial value (Init)
See how the starting register value changes CRC results and why many standards use all zeros or all ones.
5 min read
CRC parameters
CRC reflection: RefIn and RefOut
Understand reflected input, reflected output, bit order, and the most common implementation mistakes.
7 min read
CRC parameters
CRC final XOR (XorOut)
Learn when the final XOR is applied and why raw register values may differ from published CRC values.
4 min read
Verification
2 guidesCRC verification
CRC check value and “123456789”
Use the standard check string to verify an implementation and distinguish complete CRC models.
5 min read
CRC verification
CRC residue explained
Understand the residue constant and how complete codewords can be checked without separating data and CRC.
6 min read