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Method, device and apparatus for processing data recording of NOR type flash memory

A data recording and flash memory technology, applied in the field of data recording in NOR flash memory, can solve the problems of inflexible processing methods, inability to dynamically allocate space, waste of storage space, etc., to enhance stability, reduce block erase operations, The effect of prolonging the service life

Inactive Publication Date: 2008-01-09
HAIER BEIJING IC DESIGN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing method is not flexible and cannot dynamically allocate space, resulting in a waste of storage space

Method used

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  • Method, device and apparatus for processing data recording of NOR type flash memory
  • Method, device and apparatus for processing data recording of NOR type flash memory
  • Method, device and apparatus for processing data recording of NOR type flash memory

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Embodiment Construction

[0042] The basic idea of ​​the present invention is that each data record contains a record sequence number, and the data record is converted by a predetermined byte conversion rule, and a terminator is written at the end of the converted data record written into the NOR flash memory; When a specific data record is updated, only the corresponding data record can be modified, thereby reducing the number of block erases.

[0043] Before describing the method of the present invention, the predetermined byte conversion rule applied to the present invention is described first.

[0044]In the predetermined byte conversion rule, the 0x00 byte is regarded as an invalid byte, and the 0xff byte is regarded as an unwritten byte. Byte conversion rules convert bytes in data records to representations other than 0x00 bytes and 0xff bytes. In the implementation scheme of a kind of byte conversion rule, select 0xfe byte as escape character, 0xff byte, 0x00 byte and 0xfe byte are respectively...

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PUM

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Abstract

In the invention each piece of data record includes record sequence number and record content. The method includes steps: based on prearranged regulation of byte conversion to convert data record; the regulation of byte conversion is in use for converting bytes in data record to denotation without 0x00 byte and 0xff byte; the converted data records are written to not written area in NOR type flash memory, and terminal symbol is written to end of data record; all bytes of former data records, which have same record sequence numbers in NOR type flash memory, are modified to 0x00. The invention can raise speed for writing to NOR type flash memory, and reduce number of time for erasing NOR type flash memory so as to prolong service life of NOR type flash memory.

Description

technical field [0001] The present invention relates to NOR flash memory (FLASH), in particular to a method, device and equipment for processing data records in NOR flash memory Background technique [0002] Non-volatile storage media are included in many devices, such as embedded devices, to store data after the device is powered off for use after the device is restarted. Non-volatile storage media include EPROM, EEPROM, NAND flash memory, NOR flash memory, and the like. Among them, the NOR flash memory is widely used in practical applications. [0003] NOR-type flash memory has the function of executing on-chip, so that the program stored in it can be directly executed in the flash memory without having to read the program code into the system RAM for execution. NOR flash memory can be used not only to store programs, but also to store data. Usually, programs and data are stored in different areas. [0004] A NOR-type flash memory chip usually includes multiple blocks,...

Claims

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Application Information

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IPC IPC(8): G06F12/06
Inventor 史岩张凤生
Owner HAIER BEIJING IC DESIGN
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