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电子学报  2013 

基于哈希表的高效存储器内建自修复方法

DOI: 10.3969/j.issn.0372-2112.2013.07.020, PP. 1371-1377

Keywords: 内建自修复,哈希表,内建冗余分析,内建自测试

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Abstract:

现有存储器内建自修复方法要么遍历式地址比较效率低,要么并行地址比较功耗高,都不适用于大故障数存储器.对此,本文提出一种高效的存储器内建自修复方法,该方法对占故障主体的单元故障地址以哈希表形式进行存储,以利用哈希表的快速搜索特性提升地址比较效率.本文方法修复后的存储器在1个时钟周期内即可完成地址比较,修复后存储器性能不受任何影响,与目前广泛采用的基于CAM的方法处于同一水平,但功耗方面却具有明显优势.计算机模拟实验表明,对于512×512×8bits的存储器在同等冗余开销的情况下本文方法修复率相对于ESP方法平均提高了32.25%.

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