Soft error correction technique and system for odd weight row er

Details Soft error correction technique and system for odd weight row er Soft error correction technique and system for odd weight row er

1995-06-07

1997-07-01

Nguyen, Hoa T.

Excavating

G11C 2900

Patent

active

056445830

ABSTRACT:
A soft error correction technique and system for an odd weight row error correction code comprising a memory for storing a data word and its associated check bits and a control circuit for reading and inverting the data word and the check bit stored in memory. The system also comprises an inversion circuit for selectively reinverting the check bits. In a specific implementation, the check bit inversion circuit includes a plurality of Exclusive Or gates. A first input of each Exclusive Or gate is connected to receive the check bit from memory and a second input is connected to receive a control bit from a central processing unit via a software accessible control register. The inverted data word and the selectively reinverted check bit are input to an odd weight row error correcting circuit to correct a detected bit error. A method for correcting data errors for an odd weight row error correction system is also provided. The method consists of storing a data word and its associated check bits; reading and inverting the stored data word and check bit; providing a control word; selectively reinverting the stored check bit; and correcting errors in the inverted stored data word using an odd weight row error correction code.

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