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Storage management method of NOR Flash of small-internal-memory single-chip microcomputer

A technology of storage management and single-chip microcomputer, which is applied in the field of data processing, and can solve the problems of reduced service life of NORFlash and increased safety hazards, etc.

Active Publication Date: 2018-07-24
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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  • Storage management method of NOR Flash of small-internal-memory single-chip microcomputer

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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 storage management method of the NOR Flash of a small-internal-memory single-chip microcomputer and relates to the field of data processing. The method is characterized in that a NOR Flash chip which comprises a storage module and an executing program module is integrated onto the small-internal-memory single-chip microcomputer, and executing program module achieves datawriting and data reading on a storage module and spatial-loss-balancing storage management by building a sector mapping table. The method has the advantages that data storage safety is increased, andthe difficulty for cracking NOR Flash data content is increased; original data can be recovered, and data access reliability is guaranteed; the service life of the NOR Flash is prolonged by the loss balancing function; an upper program can directly read and write the NOR Flash and does not need to consider the erase operation of the NOR Flash; writing speed is higher than direct NOR Flash operation.

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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IPC IPC(8): G06F3/06
CPCG06F3/0614G06F3/062G06F3/0644G06F3/0679G06F21/79
Inventor 廖泽才
Owner AITIWEIER ELECTRONICS TECH BEIJING
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