Method for protecting the safety of storing data in flash memory storing device

Abstract

The present invention discloses a method for protecting the safety of storing data in a flash memory storing device, which comprises the following steps: a controlling bus and a data order bus of a flash memory controller are connected with a 0 chip and a 1 chip at the same time; 8 bits in a 16-bit data bus are connected with the 0 chip, and the rest 8 bits are connected with a 1 chip of the same storing unit; and a data repeating unit is in the flash memory controller. When a data managing table is written, the 0 chip and the 1 chip receive orders at the same time, a data repeating and logic unit is started, and the data managing table can be written in the 0 chip and the 1 chip at the same time. When the data managing table is read out, if the reading is failure, another chip in the same storing unit is used for reading. The method for protecting the safety of storing data in a flash memory storing device reduces the damage rate of the data managing table, protects the safety of stored data, and can provide the reliability of the flash memory controller.

Description

technical field [0001] The invention relates to the field of semiconductor storage, more specifically, a method for protecting data security in a flash memory storage device, which can significantly improve the reliability of a solid state disk based on flash memory. Background technique [0002] Flash memory is more and more widely used in various fields because of its high density, large capacity, low time-consuming read and write operations, and non-volatility. Compared with mechanical disks, the advantage of flash solid-state disks is that they Its superior shock resistance, faster random access speed (10 megabytes per second), lower power consumption, and larger operating temperature range. However, some defects in the flash memory chip itself limit the application of this type of memory. One, because the monolithic density of flash memory chips (usually only a few thousand megabytes) is still far less than that of mechanical disks (usually hundreds of thousands of meg...

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Problems solved by technology

[0015] The flash memory management methods provided by Chinese patent 200710072980.6 can ensure that the flash memory data management table is correctly written into the flash memory, but if the flash memory data management table is damaged after writing and cannot be read correctly, these patents fail to provide a way to

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