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Nor Flash storage management method of small memory single-chip microcomputer

A technology for storage management and single-chip microcomputer, which is applied in the field of data processing and can solve the problems of shortening the service life of NORFlash and increasing security risks.

Active Publication Date: 2021-02-02
AITIWEIER ELECTRONICS TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a storage management method for NOR Flash of a small-memory single-chip microcomputer, aiming to solve the problems of reduced NOR Flash service life and increased safety hazards due to repeated erasing and writing in the existing NOR Flash storage process

Method used

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  • Nor Flash storage management method of small memory single-chip microcomputer
  • Nor Flash storage management method of small memory single-chip microcomputer

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Experimental program
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Embodiment

[0110] The storage management method of the NOR Flash of the small-memory single-chip microcomputer described in the present embodiment, integrated NOR Flash chip on the small-memory single-chip microcomputer, described NOR Flash chip comprises storage module and execution program module, by building sector mapping table, execution program module realizes in Storage management for writing data, reading data, and space equalization loss on the storage module; specifically:

[0111] 1) Initialization management

[0112] Initialize the NOR Flash chip and build the sector mapping table;

[0113] 2) Write data management:

[0114] Input the target logical address, call the target physical address corresponding to the target logical address through the sector mapping table, write the target data to be written and the data stored in the target physical address into the new physical address, and simultaneously write the target logical address The mapping relationship between the add...

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Abstract

The invention discloses a NOR Flash storage management method of a small-memory single-chip microcomputer, and relates to the field of data processing. The NOR Flash chip is integrated on the small memory microcontroller. The NOR Flash chip includes a storage module and an execution program module. By building a sector mapping table, the execution program module realizes the storage of writing data, reading data, and space equalization loss on the storage module. manage. The method of the present invention improves the security of data storage and increases the difficulty of cracking the data content of NOR Flash; the original data can be restored to ensure the reliability of data access; the service life of NOR Flash is extended due to the function of equalizing loss; the upper layer The program directly reads and writes NOR Flash without considering the erase operation of NOR Flash; the writing speed is faster than directly operating NOR Flash.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a storage management method of a NOR Flash of a small-memory single-chip microcomputer. Background technique [0002] Embedded systems need to save some non-volatile data. The embedded system in the POS machine is no exception, especially the sensitive data such as the POS key, not only requires non-volatile, but also requires high security. With the rise and popularity of Android, smart POS machines using Android system came into being. The Android system is mainly used in consumer goods such as smart phones and tablet computers, so when the Android system is used in POS machines, the security of the Android system is questioned by people in the industry. [0003] In order to eliminate doubts, the smart POS machine using the Android system is equipped with two CPUs, one is a high-performance CPU, which is used to run the Android system. The other is a low-end security CPU, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
CPCG06F3/0614G06F3/062G06F3/0644G06F3/0679G06F21/79
Inventor 廖泽才
Owner AITIWEIER ELECTRONICS TECH BEIJING