Information processing system

Abstract

An information processing system includes a dynamic random access memory, a processor for information processing in cooperation with the dynamic access memory, and a built-in diagnosis module including a longevity evaluation device, the longevity evaluation device comprising, a timer for measuring an elapsed time after data is entered into a memory device, a read controller for reading the data from the memory device when the elapsed time reaches a predetermined time, and an evaluator for evaluating a longevity of the memory device based on an existence of an error in the data read by the read controller and the elapsed time.

Description

technical field [0001] An aspect of the embodiments discussed herein relates to information handling systems. Background technique [0002] DRAM (Dynamic Random Access Memory) is a volatile memory and has a structure that stores information in capacitors of memory cells. Therefore, after a period of time after data is written to the cell, the charge will leak and the information will be lost. Therefore, data written therein is refreshed at a fixed time. [0003] For example, the guaranteed data retention time for a 512Mbit DDR SDRAM is generally 64ms, and in order to retain data, it is necessary to perform a refresh operation for 32768 rows (ROW) within 64ms. [0004] Furthermore, semiconductor devices such as DRAMs have a limited lifetime to carry current and their functional characteristics degrade as the current carrying time increases. Eventually, semiconductor devices will become unable to meet guaranteed standard values ​​and reach the end of their lifetime. [000...

AI Technical Summary

Problems solved by technology

[0004] Furthermore, semiconductor devices such as DRAMs have a limited lifetime to carry current and their functional characteristics degrade as the current carrying time increases

Eventually, semiconductor devices will become unable to meet guaranteed standard values ​​and reach the end of their lifetime

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