ECC/CRC error detection and correction system
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United States of America Patent
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Jun 25, 1991
Grant Date -
N/A
app pub date -
Oct 14, 1988
filing date -
Oct 14, 1988
priority date (Note) -
Expired
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Abstract
Occurrence of uncorrectable errors in a stored sector of data which includes a data block, an error checking and correcting (ECC) block and an error detecting (CRC) block is detected. ECC logic is connected to a data bus and responsive to the ECC block in the sector, for generating an error polynomial identifying a location and a value for correctable errors in the sector. CRC logic is connected to the data bus and responsive to the CRC block in the sector for generating a syndrome identifying detected errors in the data block. An evaluation logic circuit is included that is coupled to the ECC logic and the CRC logic and responsive to the error polynomial and the syndrome for generating an uncorrectable error signal if the detected errors do not match the correctable errors. The error checking and correcting code is a Reed-Solomon code as in the X3B11 standard. Likewise the CRC code is a Reed-Solomon code as in the X3B11 standard. The evaluation logic implements a reverse CRC generation polynomial having a plurality of terms in the same order as the error polynomial. Detection logic receives the plurality of terms of the error polynomial, generates an estimated CRC syndrome based on the reverse CRC generation polynomial, and generates the uncorrectable error signal if the estimated CRC syndrome is not equal to the generated CRC syndrome.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- ADVANCED MICRO DEVICES, INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Leung, Ho-Ming | San Francisco, CA | 26 | 386 |
Pak, Edward T | Fremont, CA | 10 | 176 |
Yu, Chung-Li | San Jose, CA | 6 | 233 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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