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Entity storage comparison table generating device and method

A technology for generating devices and comparison tables, which is applied to memory systems, memory architecture access/allocation, memory address/allocation/relocation, etc., and can solve problems such as increasing data waiting time, consuming a lot of time, and being unable to store entity storage comparison tables, etc. , to achieve the effect of reducing the waiting time

Active Publication Date: 2019-12-31
SILICON MOTION INC (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limited space of the data buffer in the NAND flash storage device, it is impossible to store a complete physical storage comparison table for quick lookup, only a part of it can be stored
When the logical position in the read command sent by the main device cannot hit the part of the physical storage comparison table in the data buffer area, the NAND flash memory storage device must spend a lot of time reading the appropriate part of the physical storage comparison table from the flash storage unit, increasing the number of main devices. The waiting time for obtaining data (latency)

Method used

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  • Entity storage comparison table generating device and method
  • Entity storage comparison table generating device and method
  • Entity storage comparison table generating device and method

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Embodiment Construction

[0058] Embodiments of the present invention will be described below in conjunction with related drawings. In these drawings, the same reference numerals represent the same or similar components or method flows.

[0059] It must be understood that words such as "comprising" and "comprising" used in this specification are used to indicate the existence of specific technical features, values, method steps, operation processes, components and / or components, but do not exclude possible Plus more technical features, values, method steps, job processes, components, components, or any combination of the above.

[0060] Words such as "first", "second", and "third" used in the present invention are used to modify the components in the claims, and are not used to indicate that there is a priority order, a prior relationship, or that a component is prior relative to another component, or the chronological order in which method steps are performed, is only used to distinguish components w...

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Abstract

The embodiment of the invention provides an entity storage comparison table generating device. The device comprises a direct memory access controller, an expansion circuit and a controller; the directmemory access controller reads first physical location information corresponding to the logical location in the physical storage comparison table from the data buffer. The expansion circuit expands the first entity position information into second entity position information expressed by more bytes, so that the second entity position information conforms to the output format of the flash memory standard specification, and the waiting time for outputting the entity storage comparison table to the main device is shortened. The controller transmits the second physical location information to themaster device.

Description

technical field [0001] The invention relates to a storage device, in particular to a device and method for generating an entity storage comparison table. Background technique [0002] Flash storage devices are generally classified into NOR flash storage devices and NAND flash storage devices. The NOR flash storage device is a random access device. The host device (host) can provide any address to access the NOR flash storage device on the address pin, and obtain the data stored at the address from the data pin of the NOR flash storage device in time. on the data. In contrast, NAND flash storage devices do not have random access, but sequential access. The NAND flash storage device cannot access any random address like the NOR flash storage device. Instead, the master device needs to write the value of the sequence of bytes (bytes) into the NAND flash storage device to define the request command (command). Type (eg, read, write, erase, etc.), and the address used on this c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/1009
CPCG06F12/1009G06F13/28G06F2212/7201G06F12/0246G06F2212/1024G06F12/10G06F2213/28G06F2212/1044
Inventor 林峻苇
Owner SILICON MOTION INC (CN)