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Non-volatile memory device and empty page detection method thereof

A non-volatile, detection method technology, applied in static memory, instruments, etc., can solve problems such as inability to apply flash memory devices, correct judgment, etc.

Active Publication Date: 2020-05-29
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is conceivable that the above-mentioned existing empty page detection method cannot be applied to a flash memory device with a scrambler, because the existing empty page detection method cannot correctly judge whether the target memory page is empty based on the content of the read target memory page Page

Method used

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  • Non-volatile memory device and empty page detection method thereof
  • Non-volatile memory device and empty page detection method thereof
  • Non-volatile memory device and empty page detection method thereof

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Embodiment Construction

[0031] The term "coupled (or connected)" as used throughout the present specification (including claims) may refer to any direct or indirect connection means. For example, if it is described that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through other devices or certain A connection means indirectly connected to the second device. In addition, wherever possible, elements / components / steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Elements / components / steps using the same symbols or using the same terms in different embodiments can refer to related descriptions.

[0032] figure 1 It is a schematic circuit block diagram of a non-volatile memory device 100 according to an embodiment of the present invention. According to design requirements, the non-...

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Abstract

A non-volatile memory device and its empty page detection method. The non-volatile memory device includes non-volatile memory and a controller. The controller reads the contents of the memory page of the non-volatile memory. The controller performs low-density parity check (LDPC) decoding on at least one codeword of the storage page to obtain a decoded codeword and a check result vector. When the LDPC decoding of the codeword is successful, the controller determines that the storage page is not an empty page. When LDPC decoding of a codeword fails, the controller counts the number of bits that are 1 (or 0) in the check result vector. Based on the number of bits that are 1 (or 0) in the check result vector, the controller determines whether the storage page is a free page.

Description

technical field [0001] The present invention relates to a non-volatile memory, and in particular to a non-volatile memory device and an empty page detection method thereof. Background technique [0002] Compared with a traditional hard disk device, a solid-state hard disk (SolidState Drive, SSD) configured with a flash memory (FLASH memory) has characteristics such as fast read / write performance and low power consumption. A solid-state drive is a commonly used data storage device. During the operation of the SSD, the system (firmware and hardware) of the SSD needs to maintain a lot of updated management information, such as address mapping information, flash memory conditions information and other information. The flash memory condition information includes programming / erasing count, valid page count and other condition information. This updated management information can disappear in the event of an unexpected power outage. When the system is powered on again, the system...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C29/42G11C29/52
CPCG11C29/42G11C29/52
Inventor 戴颖煜朱江力
Owner VIA TECH INC