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Method and system for providing orientation bank refresh for volatile memories

A volatile memory and memory system technology, applied in static memory, digital memory information, information storage, etc., can solve the problems of non-accessible, frequent refresh rate memory, performance degradation, etc.

Active Publication Date: 2010-01-27
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using a higher refresh rate has its disadvantages
For example, an increased refresh rate means that the memory is not accessible more often, which results in lower performance

Method used

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  • Method and system for providing orientation bank refresh for volatile memories
  • Method and system for providing orientation bank refresh for volatile memories

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Embodiment Construction

[0021] The detailed description, set forth below in conjunction with the accompanying drawings, is intended to illustrate various embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The detailed description includes specific details in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts of the present invention.

[0022] Various embodiments of a memory system will now be described. In one embodiment, a directed refresh method that increases data availability of a memory during refresh operations is provided. figure 1 A layout 100 that can be used to implement this directional refresh method is shown. as in figure 1 As shown in , the dir...

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Abstract

A memory system is provided. The memory system includes a volatile memory having a number of banks and a memory controller configured to control the volatile memory to engage in an auto-refresh mode or a self-refresh mode. The memory controller is further configured to direct the volatile memory to perform an auto-refresh operation on a target bank. The remaining banks are available for access while the auto-refresh operation is being performed on the target bank.

Description

[0001] Related applications [0002] This application claims priority based on US Provisional Application Serial No. 60 / 575,334, filed May 27,2004. technical field [0003] The present invention relates generally to memory devices, and more particularly to methods and systems for providing directed bank refresh for volatile memory. Background technique [0004] Volatile memory is a storage medium that is usually structured as several arrays (or banks). Each bank is further arranged into a matrix of "memory cells" in the form of rows and columns, where each column is further divided by the input / output (I / O) width of the memory. The location in memory is uniquely specified by bank, row, and column. Data can be retrieved from memory using a memory controller by specifying the bank, row and column location of the data. For example, for a quad-bank 128Mb memory with a 16-bit external data bus, a possible logical address mapping includes a 9-bit column address, a 2-bit bank a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C11/406
Inventor 佩里·维尔曼·小雷马克吕斯罗伯特·迈克尔·沃克
Owner QUALCOMM INC