Memory storage device, memory controller and data writing method

Abstract

The invention discloses a memory storage device, a memory controller and a data writing method. The memory storage device is coupled to a host computer system; and the memory storage device comprises an error check and correction circuit and a reproducible nonvolatile memory chip. The method comprises a step of judging whether written data belong to a specific type when the written data are to be written into the reproducible nonvolatile memory chip, and also comprises the steps of generating at least one first type error check and correction code according with the first length by the error check and correction circuit according to the written data if the written data belong to the specific type, and generating at least one second type error check and correction code according with the second length by the error check and correction circuit according to the written data if the written data do not belong to the specific type, wherein the first length is larger than the second length.

Description

technical field [0001] The invention relates to a data writing method, in particular to a data writing method for strengthening the protection of specific data, a memory storage device and a memory controller for implementing the method. Background technique [0002] Rewritable non-volatile memory (rewritable non-volatile memory) has the characteristics of data non-volatility, power saving, small size and no mechanical structure, so it is widely used in various electronic devices. The rewritable non-volatile memory has multiple physical blocks, and each physical block has multiple physical pages. Wherein, the physical block is the smallest unit of data erasing, and the physical page is the smallest unit of data writing. The memory management circuit in the storage device converts the logical access address to be accessed by the host system into the corresponding logical page, and then accesses the physical page corresponding to the logical page. [0003] Since the data sto...

AI Technical Summary

Problems solved by technology

However, for data that is of high importance and will seriously affect the operation of the system when it is damaged, it is often impossible to reduce the risk of the system being completely unusable due to the lack of a more powerful error checking and correction mechanism.

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