Refurbishing method and device of random memorizer

A technology of random access memory and refresh times, which is applied in the direction of static memory, digital memory information, information storage, etc., can solve the problems of affecting access efficiency, affecting access efficiency, and reducing access reliability, so as to improve efficiency and reliability, reduce Refresh times, the effect of increasing the refresh times

Inactive Publication Date: 2007-05-30
WUXI ZGMICRO ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In the second method, although the refresh time is evenly distributed, the access to the memory is usually uneven in practical applications, so the second method does not fully consider the access intensity. If within a period of time, If the access intensity is high, the refresh at this time will still affect the efficiency of access and reduce the reliability of access
[0005] It can be seen that the existing refreshing technology will affect the access efficiency and reduce the reliability of the access

Method used

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  • Refurbishing method and device of random memorizer
  • Refurbishing method and device of random memorizer

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Embodiment Construction

[0044]The basic idea of ​​the present invention is: set the mapping relationship between the access intensity and the refresh interval and the number of refresh times; calculate the access intensity, determine the refresh interval and the refresh number according to the calculated access intensity and the set mapping relationship, and The refresh interval and the refresh times control the random access memory to refresh until the specified number of refreshes required by the refresh is completed within the specified time of the refresh requirement.

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0046] Random access memory generally has refresh requirements, that is, it is required to complete a specified number of refreshes within a specified time, for example, it is required to complete N tim...

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Abstract

The invention discloses a refresh method for random memorizer that it previously sets the mapping relation of the access intensity, refresh interval and refresh times. It includes: A. calculating the access intensity, determining the refresh interval and refresh times according to the access intensity and said mapping relation, controlling the refresh of random memorizer according to the refresh interval and refresh times; B. executing the step A repeatedly until complete the defined refresh times in the defined time. Additionally, a refresh device for random memorizer is disclosed. The refresh method and device provided by the invention can and improve the access efficiency and reliability.

Description

technical field [0001] The invention relates to a random access memory, in particular to a method and device for refreshing the random access memory. Background technique [0002] Random access memory is an important part of the capacity data processing circuit. With the development of data processing technology, higher and higher requirements are put forward for the capacity and performance of random access memory. Taking synchronous dynamic random access memory (SDRAM) as an example, SDRAM has large capacity, fast read and write speed, supports burst read and write, and is relatively cheap, so it has been widely used. Especially the current mobile handheld devices, such as mobile phones, MP4, etc., rely more on SDRAM. [0003] Random access memory is a volatile memory, so each address must be refreshed within a certain period, otherwise the data stored in these addresses may be lost. When refreshing, the refreshing device of the SDRAM sends a refreshing command to the SD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C11/406
Inventor 张怡浩
Owner WUXI ZGMICRO ELECTRONICS CO LTD
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