Method and apparatus for confirming Hamming error correcting code check bit

Abstract

The invention discloses a method and device for determining Hamming error correcting code check bit comprising counting transmitted data quantity, comparing counting result with integral multiple of set Hamming error correcting code information bit length; when transmitted data quantity attains to integral multiple of set Hamming error correcting code information bit length, obtaining encoding result after Hamming error correcting code for all already transmitted data; executing exclusive OR operation for the coding result with Hamming error correcting code check bit corresponding to previously determined set Hamming error correcting code information bit length, determining Hamming error correcting code check bit of this time corresponding to set Hamming error correcting code information bit length. In the invention data transmission is not needed to be interrupted, and it is not needed to determining Hamming error correcting code check bit position by resetting in data transmission, data transmission efficiency is promoted and data transmission control is more simple.

Description

technical field [0001] The invention relates to data transmission, in particular to a method for determining the check bit of a Hamming error correction code and a device for determining the check bit of a Hamming error correction code for performing error correction processing on transmitted data. Background technique [0002] At present, the read and write access of storage bodies such as NAND flash memory mostly takes a sector as a basic unit, and the size of a sector is 512 bytes (byte). During data transmission, each sector is protected by an independent error correction code. Therefore, in the design of memory bank controllers such as NAND flash memory, the error correction code circuit is a necessary part of the controller, and the Hamming error correction code circuit is a common type of error correction code circuit. [0003] figure 1 It is a schematic diagram of the traditional Hamming error-correcting code encoding. Taking the input data volume of 256 bytes as a...

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Problems solved by technology

Although this asynchronous design method does not need to interrupt the data transmission, it is difficult to generate the reset signal due to the high timing requirements of the reset signal, and the asynchronous design is not conducive to the synthesis and timing analysis of the circuit by synthesis and timing analysis tools.

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