Intel CONTROLLERS 413808 Manuale Utente Scaricare il pdf (Pagina 522)

Read 32-bit data and 7-bit ECC

Compute the syndrome by passing the 32-bit data through the G-Matrix and XORing the

7-bit result with the 7-bit ECC

if the syndrome <> 0 {ECC Error}

Look up in H-matrix to determine error type

if error is correctable {single bit}

if single-bit error correction is enabled

Correct data

Send corrected data to internal bus

if single bit error reporting is enabled

Interrupt core for software scrubbing

else {uncorrectable}

if the read cycle is not part of a RMW cycle {read}

Target-Abort the Internal Bus read transaction.

else {write requiring RMW}

Merge the new data portion with the read data from memory

Generate the new ECC with the G-matrix

Write new data and ECC

if multi-bit error reporting is enabled

Interrupt the core for uncorrectable error

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Intel CONTROLLERS 413808 Manuale Utente Pagina 522