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Data protection method, memory control circuit unit and memory storage device

A storage device and data protection technology, which is applied in the data protection of rewritable non-volatile memory modules, memory control circuit units and memory storage devices, can solve problems such as data reading errors, and ensure reliability and accuracy sexual effect

Active Publication Date: 2020-02-07
PHISON ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this, how to avoid data reading errors caused by the unstable state of the rewritable non-volatile memory module is a topic of concern to those skilled in the art

Method used

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  • Data protection method, memory control circuit unit and memory storage device
  • Data protection method, memory control circuit unit and memory storage device
  • Data protection method, memory control circuit unit and memory storage device

Examples

Experimental program
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Embodiment Construction

[0098] Generally speaking, a memory storage device (also called a memory storage system) includes a rewritable non-volatile memory module and a controller (also called a control circuit unit). Typically memory storage devices are used with a host system such that the host system can write data to or read data from the memory storage device.

[0099] figure 1 is a schematic diagram of a host system, a memory storage device, and an input / output (I / O) device according to an exemplary embodiment, and figure 2 It is a schematic diagram showing a host system, a memory storage device and an input / output (I / O) device according to another exemplary embodiment.

[0100] Please refer to figure 1 and figure 2 The host system 11 generally includes a processor 111 , a random access memory (random access memory, RAM) 112 , a read only memory (read only memory, ROM) 113 and a data transmission interface 114 . The processor 111 , random access memory 112 , ROM 113 and data transmission i...

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Abstract

The invention provides a data protection method, a memory control circuit unit and a memory storage device. The method comprises the step that during initialization operation of the memory storage device which is enabled, data is read from a first entity programmed unit of a first entity erasure unit repeatedly, wherein the first entity programmed unit is an entity programmed unit programmed at last before the memory storage device is powered off. The method also comprises the step that if the number of erroneous bits of the data read every time is not greater than an erroneous bit number threshold value and the first entity programmed unit reading number is greater than a predetermined number, a logic-entity mapping table is updated according to the first entity programmed unit. Therefore, the situation that uncorrectable data is read from unstable entity programmed units can be avoided.

Description

technical field [0001] The invention relates to a data protection method, in particular to a data protection method of a rewritable non-volatile memory module, a memory control circuit unit and a memory storage device. Background technique [0002] Digital cameras, mobile phones, and MP3 players have grown rapidly in recent years, making consumers' demand for storage media also increase rapidly. Since the rewritable non-volatile memory module (for example, flash memory) has the characteristics of data non-volatility, power saving, small size, and no mechanical structure, it is very suitable for being built into various portable devices such as the above examples. in multimedia devices. [0003] Generally, when data is programmed into the rewritable nonvolatile memory module, if the memory storage device is powered off at the end of the programming, the rewritable nonvolatile memory module will be in an unstable state. When the memory storage device is enabled, due to the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C16/26G11C16/10G11C16/34
CPCG11C16/10G11C16/26G11C16/3459
Inventor 杨凯翔
Owner PHISON ELECTRONICS