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Erase power-down data protection method and system based on NOR Flash chip

A data protection and chip technology, applied in electrical digital data processing, memory system, input/output process of data processing, etc., can solve the problems of incorrect modification of data in other areas, affecting user experience, parsing errors, etc., to reduce Granularity effect

Pending Publication Date: 2022-01-07
广州芯之联科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3) When Flash receives commands and address data under this abnormal working voltage, it may internally analyze errors, thus causing data in other areas to be incorrectly modified
In this situation where the system is damaged and cannot be started, the device can only be repaired, which greatly affects the user experience

Method used

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  • Erase power-down data protection method and system based on NOR Flash chip
  • Erase power-down data protection method and system based on NOR Flash chip
  • Erase power-down data protection method and system based on NOR Flash chip

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Embodiment Construction

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0044] In the description of the present invention, the meaning of several means one or more, and the meaning of multiple means two or more than two. Greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number . If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number...

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Abstract

The invention discloses an erase power-down data protection method and system based on a NOR Flash chip. The method comprises the following steps: acquiring equipment configuration information and sub-region boundary information of a Flash chip, storing the equipment configuration information and the sub-region boundary information in an equipment linked list node of the Flash chip, configuring Flash chip into an independent block protection mode in a power-down volatile mode, and releasing protection states of all regions of the Flash chip; receiving an erasing / writing request, pre-locking all regions, starting full protection, obtaining a to-be-operated sub-region through region analysis according to the erasing / writing request, sequentially unlocking each block or sector of the to-be-operated sub-region, and executing erasing / writing operation according to the locking and unlocking protection granularity of the to-be-operated sub-region; after the erasing operation is completed, releasing the protection states of all the regions, and feeding back state information of the erasing operation. According to the method, the granularity of the protection area can be reduced as much as possible under the condition that the erasing expectation of a user is not changed, and maximization of the protection area is achieved.

Description

technical field [0001] The invention relates to the technical field of flash chip erasing and writing power-down data protection, in particular to a NORFlash chip-based erasing and writing power-down data protection method and system. Background technique [0002] Flash memory, also known as flash memory, is a rewritable memory, which is divided into NOR Flash and NAND Flash. Because NOR Flash supports XIP (eXecute In Place), that is, the code can be executed directly on NOR Flash without copying to memory, so it has a high cost performance and is widely installed in IoT embedded devices. [0003] For embedded devices without batteries, random power loss can easily occur. For example, when modifying system files, there will be operations of erasing and writing Flash. If the device is powered off at this time, in addition to the data in the area to be erased and written not meeting expectations, there will also be a probability that other areas of the Flash (especially the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C16/16G06F12/0877G06F12/06G06F3/06
CPCG11C16/16G06F3/0652G06F3/0679G06F12/0877G06F12/0646
Inventor 吴奔雷梁毅宏夏锋李俊杰
Owner 广州芯之联科技有限公司
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