A kind of eeprom storage device and its data storage method

Abstract

The present invention proposes an EEPROM memory chip, comprising: a first storage unit for storing a first type of data, wherein the first type of data is data saved when the EEPROM memory chip was powered off last time; The second storage unit is used to store the second type of data, wherein the second type of data is the address of the first storage unit; the third storage unit is used to store the third type of data, wherein the third type of data is the current address of the second storage unit address; and a read control unit, which is used to find the second type of data in the second storage unit according to the third type of data after the EEPROM memory chip is powered on, and find the second type of data in the first storage unit according to the second type of data. A class of data. The EEPROM storage chip proposed by the invention can realize power-off protection, make full use of the storage space, and prolong the service life of the storage chip. The present invention also proposes a data storage method based on the above-mentioned EEPROM memory chip.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to an EEPROM storage device and a data storage method thereof. Background technique [0002] With the rapid increase of information, storage technology is becoming more and more important. In the existing storage technology, the data storage method of non-volatile memory in embedded system is widely used. This method is to divide it into more than one segment according to the physical structure in the memory, and give each segment The unique number, and then divide each segment into more than one logical block, and give the effective logical block a unique number in the segment, and the erasure of the segment in the memory is carried out alternately in a cycle, and the erasure times of each segment in the memory are Similarly, the uniform wear and power failure protection of the memory is realized. The above method has two modules, one for storing data and the other for stori...

AI Technical Summary

Problems solved by technology

However, for some specific chips that contain an EEPROM (Electrically Erasable Programmable Read-Only Memory) structure inside, it needs to be erased before writing when storing data, and there is no blank segment in the memory, so it cannot When the blank segment is found at power-on, the data stored at the last power-off cannot be found

For example: Freescale's EEPROM, there is no blank segment in the EEPROM, if you want to mark the blank segment, you have to write the mark bit into the EEPROM, which consumes twice the erasing times of the memory and shortens the service life of the chip

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