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Memory management method, memory control circuit unit and memory storage device

A technology of memory management and control circuit, which is applied in the field of memory management of memory control circuit unit and memory storage device, rewritable non-volatile memory module, and can solve the problem that the rewritable non-volatile memory cannot be fully utilized effectively Module service life and other issues

Active Publication Date: 2018-02-02
PHISON ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the past, the number of times of writing or erasing was used as a reference for wear leveling, and it did not consider whether the physical erasing unit whose usage times reached the limit value guaranteed by the manufacturer could continue to be used. Once the usage times reached the limit value , the physical erasing unit is marked as a bad physical erasing unit and is no longer used, resulting in the failure to effectively utilize the service life of the rewritable non-volatile memory module

Method used

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  • Memory management method, memory control circuit unit and memory storage device
  • Memory management method, memory control circuit unit and memory storage device
  • Memory management method, memory control circuit unit and memory storage device

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Embodiment Construction

[0093] figure 1 It is a schematic diagram of a host system and a memory storage device according to an exemplary embodiment.

[0094] Please refer to figure 1 , the host system 1000 generally includes a computer 1100 and an input / output (input / output, I / O) device 1106 . The computer 1100 includes a microprocessor 1102 , a random access memory (random access memory, RAM) 1104 , a system bus 1108 and a data transmission interface 1110 . figure 2 It is a schematic diagram of a computer, an input / output device and a memory storage device shown according to an exemplary embodiment of the present invention, and the input / output device 1106 includes such as figure 2 mouse 1202, keyboard 1204, monitor 1206 and printer 1208. It is important to understand that figure 2 The devices shown are not limited to the input / output device 1106, which may also include other devices.

[0095] In the embodiment of the present invention, the memory storage device 100 is electrically connected...

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Abstract

The present invention provides a memory management method, a memory control circuit unit and a memory storage device. The method includes judging whether the usage count of the rewritable non-volatile memory module is greater than the usage count threshold; according to the judging result, selecting the erasing count or the maximum number of error bits according to each physical erasing unit in the idle area, set by Sorting the physical erasing units in the spare area from small to large to form a plurality of sorted physical erasing units; and extracting a first physical erasing unit from the free area according to the sorted physical erasing units to write data. Based on this, the method can effectively prolong the service life of the rewritable non-volatile memory module.

Description

technical field [0001] The present invention relates to a memory management method, and in particular to a memory management method for a rewritable non-volatile memory module, a memory control circuit unit and a memory storage device. Background technique [0002] The rapid growth of digital cameras, mobile phones, and MP3 players has led to a rapid increase in consumer demand for storage media. Since the rewritable non-volatile memory module (rewritable non-volatile memory) has the characteristics of data non-volatility, power saving, small size, no mechanical structure, and fast read and write speed, it is most suitable for portable electronic products. For example a notebook computer. A solid state drive is a memory storage device that uses flash memory as a storage medium. Therefore, the flash memory industry has become a very popular part of the electronics industry in recent years. [0003] Wear Leveling is a technique used to manage rewritable non-volatile memory ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/02G06F3/06G11C29/42
Inventor 朱健华
Owner PHISON ELECTRONICS