{"id":1350,"date":"2012-04-07T16:57:27","date_gmt":"2012-04-07T08:57:27","guid":{"rendered":"http:\/\/blog.dword1511.info\/?p=1350"},"modified":"2012-04-07T16:57:57","modified_gmt":"2012-04-07T08:57:57","slug":"%e4%b9%9f%e8%b0%88%e8%b0%88%e4%b8%aa%e4%ba%ba%e5%af%b9-tlc-nand-%e7%9a%84%e7%9c%8b%e6%b3%95%e5%90%a7","status":"publish","type":"post","link":"http:\/\/blog.dword1511.info\/?p=1350","title":{"rendered":"\u4e5f\u8c08\u8c08\u4e2a\u4eba\u5bf9 TLC NAND \u7684\u770b\u6cd5\u5427"},"content":{"rendered":"<h2><span style=\"color: #cc0000;\">TLC \u7684\u52a3\u52bf\uff1a<\/span><\/h2>\n<h3>\u53ef\u9760\u6027<\/h3>\n<p>\u6211\u624b\u4e0a\u6709\u4e00\u7247 8GB \u7684 Intel JS29F64G08AATE1 TLC \u95ea\u5b58\uff0c\u653e\u5728\u5b89\u56fd SC708 \u4e0a\u91cf\u4ea7\u7684\u65f6\u5019\u53d1\u73b0 ECC \u5fc5\u987b\u5f00\u5230 4 \u4ee5\u4e0a\u624d\u80fd\u6210\u529f\uff0c\u5426\u5219\u5fc5\u7136\u6d4b\u51fa\u6765 100% \u90fd\u662f\u574f\u5757\u3002\u800c MLC \u95ea\u5b58\u5373\u4f7f\u662f\u9ed1\u7247 ECC \u8bbe\u4e3a 0 \u4e5f\u6ca1\u6709\u592a\u5927\u95ee\u9898\uff0c\u53ea\u662f\u5bb9\u91cf\u4f1a\u7f29\u6c34\u3002<\/p>\n<p>\u5e76\u4e14\u8fd9\u5feb\u95ea\u5b58\u5728\u4f7f\u7528\u4e00\u6bb5\u65f6\u95f4\u540e\u518d\u6b21\u4f4e\u683c\uff0c\u867d\u7136\u574f\u5feb\u6ca1\u6709\u589e\u52a0\uff0c\u4f46\u662f\u8bfb\u53d6\u4ece 22MB\/s \u6389\u5230\u4e86 8MB\/s \u3002<\/p>\n<p>\u867d\u7136\u6709\u5907\u4efd\u7684\u597d\u4e60\u60ef\uff0c\u4f46\u662f\u6211\u8fd8\u662f\u89c9\u5f97\u4e22\u6587\u4ef6\u662f\u4e00\u4ef6\u5f88\u4e0d\u723d\u5f88\u9ebb\u70e6\u7684\u4e8b\u60c5\u3002\u800c\u4e14\u5173\u952e\u7684\u65f6\u5019\u5f88\u5bb9\u6613\u574f\u4e8b\u3002<\/p>\n<h3><!--more-->\u4e3b\u63a7\u652f\u6301<\/h3>\n<p>\u73b0\u5728\u80fd\u89c1\u5230\u7684 TLC \u9897\u7c92\u4e5f\u4e0d\u7b97\u592a\u591a\uff0c\u4f46\u662f\u7adf\u7136\u6ca1\u6709\u4e00\u79cd\u5e38\u89c1\u7684\u63a7\u5236\u5668\u80fd\u652f\u6301\u8fd9\u5176\u4e2d\u7684 80% \u3002\u6211\u624b\u4e0a\u8fd9\u5757 AATE \u4e4b\u6240\u4ee5\u653e\u5728 SC708 \u4e0a\u4e5f\u662f\u51fa\u4e8e\u65e0\u5948\uff0cUP19 \u4e0d\u652f\u6301\uff08\u652f\u6301\u5217\u8868\u90a3\u4e00\u884c\u5168\u662f\u6a2a\u6760\uff0c\u6211\u4e5f\u710a\u4e0a\u53bb\u8bd5\u8fc7\uff0c\u4e0d\u884c\uff09\uff0cSM3257 \u4e5f\u4e0d\u652f\u6301\u3002\u4ee5\u524d\u4e5f\u6709\u4e00\u7247 SDTNPNAHEM-004G \uff0c\u56e0\u4e3a\u5b9e\u5728\u6ca1\u6709\u4e3b\u7a7a\u652f\u6301\u6254\u6389\u4e86\uff08\u552f\u4e00\u652f\u6301\u5b83\u7684\u9664\u4e86 SanDisk \u81ea\u5bb6\u7684\u63a7\u5236\u5668\u4f3c\u4e4e\u5c31\u53ea\u6709 SM3257EN \u4e86\uff0c\u8fd9\u73a9\u610f\u4e0d\u597d\u4e70\u5230\uff0cSM3257 != SM3257EN\uff09\u3002<\/p>\n<h3>\u5bff\u547d<\/h3>\n<p>\u5728\u8fd9\u91cc\u8c08\u4e24\u4e2a\u95ee\u9898\uff0cendurance \u8ddf data retention \u3002\u524d\u8005\u544a\u8bc9\u6211\u4eec\u4e00\u5757\u95ea\u5b58\u80fd\u88ab\u64e6\u5199\u591a\u5c11\u6b21\uff0c\u540e\u8005\u544a\u8bc9\u6211\u4eec\u95ea\u5b58\u4e2d\u7684\u5185\u5bb9\u5728\u7ecf\u8fc7\u591a\u957f\u65f6\u95f4\u540e\u4f1a\u56e0\u4e3a\u6d6e\u6805\u7ba1\u6f0f\u7535\u7b49\u56e0\u7d20\u800c\u4e22\u5931\uff08\u6709\u7684\u65f6\u5019\u751a\u81f3\u662f\u8bfb\u53d6\u90fd\u4f1a\u5bfc\u81f4\u6d6e\u6805\u7ba1\u7684\u6d6e\u6805\u7535\u8377\u53d1\u751f\u53d8\u5316\uff0c\u6709\u4e9b\u5382\u5546\u7684\u6570\u636e\u8868\u63d0\u5230\u4e86\u8fd9\u70b9\uff09\u3002<\/p>\n<p>\u5bf9\u4e8e MLC \uff0c\u6570\u636e\u8868\u4e2d\u4e00\u822c\u90fd\u4f1a\u6709 endurance \u8ddf retention \u7684\u6570\u636e\uff0cendurance \u5e38\u89c1\u7684\u6709 3K\/5K\/10K \uff0cretention \u4e00\u822c\u90fd\u662f 10 \u5e74\u3002<\/p>\n<p>\u800c\u5bf9 TLC \u6765\u8bb2\uff0c\u5728\u5c11\u4e4b\u53c8\u5c11\u7684\u80fd\u5f04\u5230\u7684\u6570\u636e\u8868\u4e2d\uff0c\u8fd9\u4e24\u4e2a\u6570\u636e\u90fd\u6ca1\u6709\u786e\u5207\u7684\u88ab\u6307\u51fa\u3002\u5173\u4e8e endurance \uff0cmydigit \u4e0a\u6709\u4e9b\u575b\u53cb\u505a\u4e86\u6d4b\u8bd5\u8ba4\u4e3a\u6709\u51e0\u5343\u6b21\u5de6\u53f3\uff0c\u4f46\u662f\u770b\u4e86\u4ed6\u4eec\u7684\u6d4b\u8bd5\u65b9\u6cd5\u4e4b\u540e\u6211\u53d1\u73b0\u4ed6\u4eec\u4f3c\u4e4e\u628a\u63a7\u5236\u5668\u7684\u529f\u52b3\u667e\u4e00\u8fb9\u4e86\u3002\u6700\u4e25\u8c28\u7684\u6d4b\u8bd5\u65b9\u6cd5\u662f\u91cf\u4ea7\u65f6\u5c3d\u91cf\u51cf\u5c11\u4fdd\u7559\u533a\u5757\uff08\u6709\u7684\u65f6\u5019\u4fdd\u7559\u533a\u5757\u53ef\u591a\u8fbe\u51e0\u767e\u5146\uff0c\u5bf9\u5927\u5bb9\u91cf\u4e14\u5f80\u5f80\u5e26\u6709\u989d\u5916\u5757\u7684 TLC \u6765\u8bb2\u5c24\u5176\u662f\u8fd9\u6837\uff0c\u62ff\u4e00\u4e24\u4e2a\u5757\u6765\u6d4b\u8bd5\u7684\u65f6\u5019 worn-out leveling \u5f88\u5bb9\u6613\u5c31\u53d1\u6325\u4f5c\u7528\u4e86\uff09\uff0c\u7136\u540e\u5168\u76d8\u64e6\u5199\u6d4b\u8bd5\u3002\u81f3\u4e8e retention \u65b9\u9762\uff0c\u8fd9\u4e2a\u662f\u9700\u8981\u65f6\u95f4\u3001\u8010\u5fc3\u8ddf\u597d\u8bb0\u6027\u7684\uff08\u76d8\u5b50\u4e22\u89d2\u843d\u91cc\u7ed3\u679c\u627e\u4e0d\u5230\u4e86\u5c31\u5e9f\u4e86\uff09\uff0c\u5e76\u4e14\u4f3c\u4e4e\u4e5f\u6ca1\u4eba\u5728\u95ea\u5b58\u91cc\u9762\u957f\u671f\u4fdd\u5b58\u8d44\u6599\uff0c\u6240\u4ee5\u8fd9\u70b9\u6682\u4e0d\u8ba8\u8bba\u3002\u4e0d\u8fc7\uff0c\u8981\u5728\u4e00\u4e2a cell \u91cc\u9762\u5206\u51fa 16 \u4e2a level \u7684 TLC \u5728 retention \u65b9\u9762\u80af\u5b9a\u5f97\u4e0b\u66f4\u591a\u7684\u529f\u592b\u3002<\/p>\n<h3>\u901f\u5ea6<\/h3>\n<p>\u6709\u7684\u65f6\u5019 TLC \u7684\u8bfb\u53d6\u8fd8\u662f\u5f88\u4e0d\u9519\u7684\uff0c\u4f46\u662f\u5199\u5165\u786e\u5b9e\u662f\u786c\u4f24\u3002\u6709\u4e9b\u4eba\u53d1\u73b0 TLC \u7684\u76d8\u5b50\u5199\u5165\u53ef\u4ee5\u8fbe\u5230 10MB\/s \u4ee5\u4e0a\uff0c\u4f46\u662f\u4ed6\u4eec\u6ca1\u53d1\u73b0\u81ea\u5df1\u624b\u4e0a\u7684\u76d8\u5b50\u662f 2CE \u6216\u8005 4CE \u7684\uff08\u7ba1\u82af\u8ddf plane \u7684\u6570\u76ee\u5c31\u4e0d\u5f97\u800c\u77e5\u4e86\uff09\u3002Interleave \u5bf9\u8bfb\u53d6\u6ca1\u591a\u5927\u5e2e\u52a9\uff0c\u4f46\u662f\u5bf9\u4e8e\u5199\u5165\uff08\u5c24\u5176\u662f TLC \u8fd9\u6837 page \u7f16\u7a0b\u65f6\u95f4\u957f\u8fbe\u6570\u6beb\u79d2\u7684\uff09\u5e2e\u52a9\u975e\u5e38\u5927\uff0c\u751a\u81f3\u53ef\u4ee5\u63a5\u8fd1\u591a\u901a\u9053\u90a3\u6837\u6210\u500d\u589e\u52a0\u7684\u6548\u679c\u3002\u53e6\u5916\u7531\u4e8e TLC \u5bf9\u4e8e ECC \u7684\u4f9d\u8d56\u589e\u52a0\u4e86\u63d0\u9ad8\u901f\u5ea6\u5bf9\u4e3b\u63a7\u786c\u4ef6 ECC \u5f15\u64ce\u7684\u8981\u6c42\uff08\u5f53\u7136\uff0c\u8fd8\u6709\u8017\u7535\u91cf\u7684\u95ee\u9898\uff0c\u4f46\u662f\u8fd9\u4e2a\u592a\u9e21\u808b\u4e86\uff0c\u4e0d\u8ba8\u8bba\uff09\uff0c\u4f7f\u5f97\u901f\u5ea6\u96be\u4ee5\u5f97\u5230\u63d0\u5347\u3002<\/p>\n<h3>\u73b0\u5728\u4e0d\u6210\u719f\uff0c\u524d\u666f\u5374\u53c8\u4e0d\u660e\u4e86<\/h3>\n<p>\u5f88\u96be\u8bf4\u4ee5\u540e TLC \u4f1a\u600e\u6837\uff0c\u4f46\u662f\u76ee\u524d\u6765\u8bf4\u60c5\u51b5\u4e0d\u662f\u5f88\u4e50\u89c2\u3002TLC \u5176\u5b9e\u4e5f\u4e0d\u7b97\u6700\u8fd1\u4e24\u5e74\u7684\u6280\u672f\u4e86\uff0c\u4f46\u662f\u5b83\u7684\u6210\u957f\u5b9e\u5728\u4e0d\u600e\u4e48\u5feb\uff0c\u4e0d\u50cf\u5f53\u65f6 MLC \u7684\u51fa\u73b0\u76f4\u63a5\u5bfc\u81f4\u5404\u79cd\u5b58\u50a8\u8bbe\u5907\u8ddf PMP \u4ef7\u683c\u8df3\u6c34\u5e76\u5927\u4f17\u5316\uff0c\u540c\u65f6\u5b58\u50a8\u5668\u7684\u901f\u5ea6\u548c\u5bb9\u91cf\u4e00\u8def\u98d9\u5347\u3002SLC \u5230 MLC \u662f 1bit\/cell \u5230 2bit\/cell \u7684\u53d8\u5316\uff0c\u5bc6\u5ea6\u76f4\u63a5\u589e\u52a0\u4e00\u500d\uff0c\u8fd8\u662f\u5f88\u5212\u7b97\u7684\u3002\u4f46\u662f MLC \u5230 TLC \u7684\u5bc6\u5ea6\u589e\u52a0\u5374\u53ea\u6709 50% \uff0c\u4e0d\u662f\u90a3\u4e48\u7684\u660e\u663e\u3002\u53e6\u5916\uff0c\u968f\u7740\u5236\u7a0b\u8fdb\u4e00\u6b65\u964d\u4f4e\uff0cMLC \u3001TLC \u7684\u53ef\u9760\u6027\u8ddf\u6027\u80fd\u90fd\u5c06\u53d7\u5230\u66f4\u4e25\u5cfb\u7684\u8003\u9a8c\uff0c\u540c\u65f6\u4ef7\u683c\u7ade\u4e89\u4e5f\u5c06\u4f1a\u66f4\u6fc0\u70c8\uff0cTLC \u90a3\u5e76\u4e0d\u662f\u5f88\u660e\u663e\u7684\u4ef7\u683c\u4f18\u52bf\u4f1a\u4e0d\u4f1a\u53d8\u5f97\u66f4\u4e0d\u660e\u663e\u5462\uff1f<\/p>\n<p>\u53e6\u5916\uff0cQLC NAND \u5bf9\u95ea\u5b58\u5e02\u573a\u4e5f\u5df2\u7ecf\u864e\u89c6\u7708\u7708\u4e86\u3002TLC \u7684 3bit \u51d1\u6210\u4e00\u4e2a 8bit \u7684\u5b57\u8282\u662f\u5f88\u522b\u626d\u7684\uff08\u8fd9\u610f\u5473\u7740\u4f60\u9700\u8981\u66f4\u590d\u6742\u7684\u7ec4\u7ec7\u65b9\u5f0f\u6216\u8005\u4e00\u4e9b dirty trick \uff09\uff0cQLC \u6210\u719f\u4ee5\u540e\u8ddf TLC \u5b70\u4f18\u5b70\u52a3\u8fd8\u5f88\u96be\u8bb2\u3002<\/p>\n<h2><span style=\"color: #008000;\">TLC \u7684\u4f18\u52bf\uff1a<\/span><\/h2>\n<h3>\u5bb9\u91cf\u5f88\u5bb9\u6613\u505a\u4e0a\u53bb<\/h3>\n<p>\u4e00\u822c\u5927\u5bb6\u4e70\u5230\u7684 TLC \u90fd\u662f 8G \u4ee5\u4e0a\u7684\uff0c4G \u8ddf 2G \u6bd4\u8f83\u5c11\u89c1\u3002\u8fd9\u662f\u56e0\u4e3a TLC \u7684 3bit\/cell \u7684\u7ed3\u6784\u660e\u663e\u80fd\u6bd4 MLC \u63d0\u4f9b\u66f4\u9ad8\u7684\u5bc6\u5ea6\uff08\u867d\u7136\u4e0d\u50cf MLC \u5bf9 SLC \u90a3\u6837\u660e\u663e\uff09\u3002\u4e0d\u8fc7\uff0c\u7531\u4e8e\u901f\u5ea6\u8f83\u6162\uff0c\u867d\u7136\u6709\u5bb9\u91cf\u4f46\u662f\u62ff\u6765\u62f7\u8d1d\u5927\u6587\u4ef6\u5374\u663e\u5f97\u5f88\u8270\u96be\u3002<\/p>\n<h3>\u4fbf\u5b9c<\/h3>\n<p>TLC \u6bd4 MLC \u4fbf\u5b9c\u662f\u4e8b\u5b9e\uff0c\u4f46\u662f\u540c\u6837\u4e0d\u5982 SLC \u8ddf MLC \u4e4b\u95f4\u7684\u5dee\u8ddd\u90a3\u6837\u660e\u663e\u3002\u5728\u6210\u54c1\u5b58\u50a8\u5668\u4e2d\u8fd9\u70b9\u4f18\u52bf\u5c31\u66f4\u4e0d\u660e\u663e\u4e86\uff0c\u56e0\u4e3a TLC \u9700\u8981\u66f4\u590d\u6742\u7684\u63a7\u5236\u5668\u548c\u7b97\u6cd5\u6765\u4fdd\u8bc1\u5bff\u547d\u8ddf\u901f\u5ea6\u3002<\/p>\n<h2><span style=\"color: #ffcc00;\">\u603b\u7ed3\uff1a<\/span><\/h2>\n<p>TLC \u56fa\u7136\u4e0d\u662f\u4e00\u65e0\u662f\u5904\uff0c\u4f46\u662f\u5b83\u7684\u4f18\u52bf\u76f8\u6bd4\u4e8e\u5b83\u7684\u95ee\u9898\u6765\u8bf4\u5e76\u4e0d\u660e\u663e\uff08\u751a\u81f3\u6709\u70b9\u5f97\u4e0d\u507f\u5931\uff09\uff0c\u800c\u4e14\u8fd8\u8981\u53d7\u5230 QLC \u7684\u7ade\u4e89\uff0c\u5b83\u80fd\u5728\u5e02\u573a\u4e0a\u5b58\u5728\u591a\u957f\u65f6\u95f4\u662f\u4e2a\u7591\u95ee\u3002<\/p>\n<p>MLC \u5219\u662f\u5728\u5404\u4e2a\u65b9\u9762\u53d6\u5f97\u4e86\u826f\u597d\u7684\u5e73\u8861\uff0c\u4ef7\u683c\u53ea\u6709 SLC \u4e00\u534a\u4e0d\u5230\uff08\u8fd9\u8fd8\u4ec5\u4ec5\u662f\u5728\u5c0f\u5bb9\u91cf\u95ea\u5b58\u4e0a\uff09\uff0c\u5bc6\u5ea6\u662f SLC \u4e24\u500d\uff0c\u540c\u65f6\u6027\u80fd\u5c24\u5176\u662f\u53ef\u9760\u6027\u5374\u672a\u727a\u7272\u592a\u591a\u5e76\u4e14\u90fd\u591f\u7528\u3002MLC \u5bf9\u95ea\u5b58\u7684\u666e\u53ca\u505a\u51fa\u4e86\u5de8\u5927\u7684\u8d21\u732e\uff0c\u4f46\u662f TLC 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href=\"http:\/\/blog.dword1511.info\/?p=1350\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u4e5f\u8c08\u8c08\u4e2a\u4eba\u5bf9 TLC NAND \u7684\u770b\u6cd5\u5427<\/span> <span 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