{"id":15679,"date":"2023-12-28T11:26:24","date_gmt":"2023-12-28T03:26:24","guid":{"rendered":"http:\/\/www.szryc.com\/?p=15679"},"modified":"2023-12-28T11:26:24","modified_gmt":"2023-12-28T03:26:24","slug":"%e8%8a%af%e7%89%87%e8%ae%be%e8%ae%a1%e6%b5%8b%e8%af%95%e4%b8%adscan%e5%92%8cbist%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=15679","title":{"rendered":"\u82af\u7247\u8bbe\u8ba1\u6d4b\u8bd5\u4e2dscan\u548cbist\u7684\u533a\u522b"},"content":{"rendered":"<p>Scan\uff08\u626b\u63cf\u6d4b\u8bd5\uff09\u548cBIST\uff08\u5185\u5efa\u81ea\u6d4b\u8bd5\uff09\u90fd\u662f\u7528\u4e8e\u82af\u7247\u6d4b\u8bd5\u7684\u6280\u672f\uff0c\u4f46\u5b83\u4eec\u5728\u5b9e\u73b0\u65b9\u5f0f\u548c\u5e94\u7528\u573a\u666f\u4e0a\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<p>**Scan\uff08\u626b\u63cf\u6d4b\u8bd5\uff09**\uff1a<br \/>\n\u626b\u63cf\u6d4b\u8bd5\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6570\u5b57\u96c6\u6210\u7535\u8def\u6d4b\u8bd5\u6280\u672f\u3002\u5728\u8bbe\u8ba1\u9636\u6bb5\uff0c\u5de5\u7a0b\u5e08\u4f1a\u5728\u82af\u7247\u4e2d\u6dfb\u52a0\u989d\u5916\u7684\u786c\u4ef6\uff08\u626b\u63cf\u94fe\uff09\uff0c\u4ee5\u4fbf\u5728\u6d4b\u8bd5\u9636\u6bb5\u5c06\u6d4b\u8bd5\u6570\u636e\u8f93\u5165\u5230\u82af\u7247\u5185\u90e8\u7684\u7279\u5b9a\u4f4d\u7f6e\uff0c\u5e76\u4ece\u7279\u5b9a\u4f4d\u7f6e\u8bfb\u53d6\u6d4b\u8bd5\u7ed3\u679c\u3002\u626b\u63cf\u6d4b\u8bd5\u4e3b\u8981\u7528\u4e8e\u751f\u4ea7\u9636\u6bb5\u7684\u6d4b\u8bd5\uff0c\u4ee5\u68c0\u6d4b\u51fa\u53ef\u80fd\u7684\u5236\u9020\u7f3a\u9677\u3002\u5b83\u53ef\u4ee5\u63d0\u4f9b\u5f88\u9ad8\u7684\u6545\u969c\u8986\u76d6\u7387\uff0c\u4f46\u662f\u9700\u8981\u5916\u90e8\u7684\u6d4b\u8bd5\u8bbe\u5907\u548c\u590d\u6742\u7684\u6d4b\u8bd5\u5411\u91cf\u751f\u6210\u3002<\/p>\n<p>**BIST\uff08\u5185\u5efa\u81ea\u6d4b\u8bd5\uff09**\uff1a<br \/>\nBIST\u662f\u4e00\u79cd\u5c06\u6d4b\u8bd5\u903b\u8f91\u76f4\u63a5\u96c6\u6210\u5230\u88ab\u6d4b\u8bd5\u7cfb\u7edf\u4e2d\u7684\u65b9\u6cd5\uff0c\u4f7f\u7cfb\u7edf\u80fd\u591f\u8fdb\u884c\u81ea\u6211\u6d4b\u8bd5\u3002BIST\u901a\u5e38\u5305\u62ec\u4e00\u4e2a\u6d4b\u8bd5\u6a21\u5f0f\u751f\u6210\u5668\u548c\u4e00\u4e2a\u6d4b\u8bd5\u54cd\u5e94\u5206\u6790\u5668\u3002\u5728\u6d4b\u8bd5\u9636\u6bb5\uff0c\u6d4b\u8bd5\u6a21\u5f0f\u751f\u6210\u5668\u4f1a\u81ea\u52a8\u4ea7\u751f\u6d4b\u8bd5\u5411\u91cf\uff0c\u6d4b\u8bd5\u54cd\u5e94\u5206\u6790\u5668\u4f1a\u6536\u96c6\u5e76\u5206\u6790\u6d4b\u8bd5\u7ed3\u679c\u3002BIST\u53ef\u4ee5\u5728\u7cfb\u7edf\u7684\u751f\u547d\u5468\u671f\u4e2d\u7684\u4efb\u4f55\u65f6\u95f4\u8fdb\u884c\u6d4b\u8bd5\uff0c\u5305\u62ec\u751f\u4ea7\u6d4b\u8bd5\u3001\u7cfb\u7edf\u542f\u52a8\u65f6\u7684\u81ea\u6211\u6d4b\u8bd5\uff0c\u751a\u81f3\u7cfb\u7edf\u8fd0\u884c\u65f6\u7684\u5728\u7ebf\u6d4b\u8bd5\u3002BIST\u7684\u4f18\u70b9\u662f\u53ef\u4ee5\u8fdb\u884c\u5728\u7cfb\u7edf\u7ea7\u522b\u7684\u6d4b\u8bd5\uff0c\u65e0\u9700\u5916\u90e8\u7684\u6d4b\u8bd5\u8bbe\u5907\uff0c\u4f46\u53ef\u80fd\u4f1a\u589e\u52a0\u8bbe\u8ba1\u7684\u590d\u6742\u6027\u548c\u786c\u4ef6\u5f00\u9500\u3002<\/p>\n<p><strong>Scan Design -- \u626b\u63cf\u8def\u5f84\u8bbe\u8ba1<\/strong><\/p>\n<p>Scan \u6280\u672f\u6700\u521d\u7531Kobayashi\u7b49\u4eba\u63d0\u51fa\u6765\u7684\uff0c\u5b83\u7684\u4f18\u70b9\u662f\u57fa\u672c\u539f\u7406\u662f\u65f6\u5e8f\u7535\u8def\u53ef\u4ee5\u6a21\u578b\u5316\u4e3a\u4e00\u4e2a\u7ec4\u5408\u7535\u8def\u7f51\u7edc\u3002<\/p>\n<p><strong>Scan design\u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u80fd\u591f\u63d0\u9ad8\u53ef\u63a7\u6027\u548c\u53ef\u89c2\u6d4b\u6027\u3002<\/strong><\/p>\n<p>\u901a\u8fc7\u5728\u903b\u8f91A\u548c\u903b\u8f91B\u4e4b\u95f4\u63d2\u5165\u4e00\u4e9b\u989d\u5916\u7684\u786c\u4ef6\u7535\u8def\uff0c\u4fbf\u53ef\u89c2\u6d4b&amp;\u63a7\u5236\u903b\u8f91A\u4f20\u9012\u5230\u903b\u8f91B\u7684\u503c\u3002[1]<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15681\" title=\"wKgaomUjwBOASctxAAL8IKVmw20678\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBOASctxAAL8IKVmw20678.png\" alt=\"wKgaomUjwBOASctxAAL8IKVmw20678\" width=\"597\" height=\"421\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBOASctxAAL8IKVmw20678.png?v=1703733941 597w, http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBOASctxAAL8IKVmw20678-300x212.png?v=1703733941 300w\" sizes=\"(max-width: 597px) 100vw, 597px\" \/><\/p>\n<p>scan \u5206\u4e3a\u4e24\u6b65\uff1a<\/p>\n<p><strong>1. Scan repl<u>ac<\/u>ement<\/strong><\/p>\n<p>\u628a\u666e\u901a\u7684DFF\uff0c\u66ff\u6362\u6210\u5e26Scan DFF\uff0c\u4e0b\u56fe\u662f\u4e00\u4e2amux-D\u7684DFF\uff0c\u53ef\u4ee5\u770b\u5230\u591a\u4e86\u4e00\u4e2aSI\uff0cSE\uff0c\u548c\u4e00\u4e2amux\u3002<\/p>\n<p>\u5176SE\u7aef\u503c\u4e3a0\u65f6\uff0c\u7535\u8def\u5de5\u4f5c\u5728\u6b63\u5e38\u529f\u80fd\u72b6\u6001\u5e76\u80fd\u628aD\u7aef\u7684\u503c\u9501\u5b58\u4e0b\u6765\uff1b\u5f53SE\u4e3a1\u65f6\uff0c\u7535\u8def\u5de5\u4f5c\u5728\u6240\u8c13scan mode\u5e76\u9501\u5b58SI\u7684\u503c\u3002<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15682\" title=\"wKgaomUjwBSAUacJAADyM9ExvfE942\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAUacJAADyM9ExvfE942.png\" alt=\"wKgaomUjwBSAUacJAADyM9ExvfE942\" width=\"712\" height=\"293\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAUacJAADyM9ExvfE942.png?v=1703733941 712w, http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAUacJAADyM9ExvfE942-300x123.png?v=1703733941 300w\" sizes=\"(max-width: 712px) 100vw, 712px\" \/><\/p>\n<p>\u5e38\u89c1\u7684scan cell\u6709\u4e09\u79cd\uff1a<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15683\" title=\"wKgaomUjwBSAGqF_AAOLPUiEOC0684\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAGqF_AAOLPUiEOC0684.png\" alt=\"wKgaomUjwBSAGqF_AAOLPUiEOC0684\" width=\"597\" height=\"442\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAGqF_AAOLPUiEOC0684.png?v=1703733941 597w, http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAGqF_AAOLPUiEOC0684-300x222.png?v=1703733941 300w\" sizes=\"(max-width: 597px) 100vw, 597px\" \/><\/p>\n<p><strong>2. Scan stitching<\/strong><\/p>\n<p>Scan stitching \u662f\u628a\u4e0a\u4e00\u6b65\u4e2d\u5f97\u5230\u7684Scan DFF\u7684Q\u548cSI\u8fde\u63a5\u5728\u4e00\u8d77\u5f62\u6210scan chain\u3002\u5728\u82af\u7247\u7684\u9876\u5c42\u6709\u5168\u5c40\u7684SE<u>\u4fe1\u53f7<\/u>\uff0c\u4ee5\u53cascan chain\u7684\u8f93\u5165\u8f93\u51fa\u4fe1\u53f7\uff1aSI \u548c SO\u3002\u901a\u8fc7scan chain\u7684\u8fde\u7eed\u52a8\u4f5c\uff0c\u5c31\u53ef\u4ee5\u628a\u95ee\u9898\u4ece\u5bf9\u590d\u6742\u65f6\u5e8f\u7535\u8def\u7684\u6d4b\u8bd5\u8f6c\u5316\u6210\u6d4b\u8bd5\u7ec4\u5408\u7535\u8def\u3002<\/p>\n<p>\u5b9e\u9645\u5728\u8bbe\u8ba1\u4e2d\uff0c\u8fd9\u4e24\u6b65\u90fd\u662f\u7531<u>EDA\u5de5\u5177<\/u>\u5b8c\u6210\u7684\u3002<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15685\" title=\"wKgaomUjwBSAZ66EAAF1Cmaw8jk821\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAZ66EAAF1Cmaw8jk821.png\" alt=\"wKgaomUjwBSAZ66EAAF1Cmaw8jk821\" width=\"718\" height=\"209\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAZ66EAAF1Cmaw8jk821.png?v=1703733942 718w, http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAZ66EAAF1Cmaw8jk821-300x87.png?v=1703733942 300w\" sizes=\"(max-width: 718px) 100vw, 718px\" \/><\/p>\n<p>\u4e0a\u9762\u7684\u4e24\u5e45\u56fe\u90fd\u53ea\u6709\u65f6\u5e8f\u5355\u5143\uff0c\u6211\u4eec\u518d\u628a\u7ec4\u5408\u903b\u8f91\u653e\u8fdb\u6765\u3002<\/p>\n<p><strong>Bef<u>or<\/u>e scan<\/strong><\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15684\" title=\"wKgaomUjwBSAAF01AAF56OT2qRc612\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAAF01AAF56OT2qRc612.png\" alt=\"wKgaomUjwBSAAF01AAF56OT2qRc612\" width=\"619\" height=\"211\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAAF01AAF56OT2qRc612.png?v=1703733941 619w, http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAAF01AAF56OT2qRc612-300x102.png?v=1703733941 300w\" sizes=\"(max-width: 619px) 100vw, 619px\" \/><\/p>\n<p><strong>Af<u>te<\/u>r scan insertion<\/strong><\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15686\" title=\"wKgaomUjwBSAAyyVAANAISgCLOg728\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAAyyVAANAISgCLOg728.png\" alt=\"wKgaomUjwBSAAyyVAANAISgCLOg728\" width=\"720\" height=\"346\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAAyyVAANAISgCLOg728.png?v=1703733943 720w, http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBSAAyyVAANAISgCLOg728-300x144.png?v=1703733943 300w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>Scan test \u7684\u6b65\u9aa4\uff1a<\/p>\n<p>1.\u628aScan-En\u8bbe\u62100\uff0c\u6b64\u65f6\u7535\u8def\u5de5\u4f5c\u5728\u6b63\u5e38\u72b6\u6001\uff08function mode)\u4e0b, scan insertion\u5bf9\u7535\u8def\u7684\u6b63\u5e38\u529f\u80fd\u6ca1\u6709\u5f71\u54cd\u3002<\/p>\n<p>2.\u628aScan-En\u8bbe\u62101\uff0c\u7136\u540e\u628aenable clock\u6765\u9a71\u52a8\u5bc4\u5b58\u5668\uff0c\u5728Scan-In\u7aef\u8f93\u5165\u6d4b\u8bd5\u6570\u636e\uff0c\u7136\u540e\u5728\u8f93\u51fa\u7aefScan-Out\u89c2\u6d4b\uff0c\u7528\u6b64\u79cd\u65b9\u6cd5\u4fbf\u53ef\u4ee5\u6d4b\u8bd5Flip-Flop.<\/p>\n<p>3.\u6d4b\u8bd5\u7ec4\u5408\u903b\u8f91\u7684\u65f6\u5019\uff0c\u628aScan-En\u8bbe\u62101\uff0c\u7136\u540eenable clock\u6765\u9a71\u52a8\u5bc4\u5b58\u5668\uff0c\u5728Scan-In\u7aef\u8f93\u5165\u6d4b\u8bd5\u6570\u636e\uff0c\u4e24\u4e2a<u>\u65f6\u949f<\/u>\u5468\u671f\u540e\uff0c\u6570\u636e\u4fbf\u4f1a\u9001\u5230\u7ec4\u5408\u903b\u8f91\u7684\u8f93\u5165\u7aef\u3002<\/p>\n<p>4.\u7136\u540e\u628aScan-En\u8bbe\u62100\uff0c\u65f6\u949f\u6253\u4e00\u62cd\uff0c\u7ecf\u8fc7\u7ec4\u5408\u903b\u8f91\u7684\u8f93\u51fa\u503c\u4fbf\u4f1a\u9001\u5230\u53f3\u4fa7\u7684<u>\u5bc4\u5b58\u5668<\/u>\u4e2d\u3002<\/p>\n<p>5.\u518d\u628aScan-En\u8bbe\u62101\uff0c\u6b64\u65f6scan chain \u5de5\u4f5c\u5728shift mode\uff0c\u6b64\u65f6\u4fbf\u53ef\u4ee5\u628a\u7ec4\u5408\u903b\u8f91\u7684\u8f93\u51fa\u503cshift\u51fa\u6765\uff0c\u548c\u671f\u671b\u503c\u8fdb\u884c\u6bd4\u8f83\u3002<\/p>\n<p>\u7ecf\u8fc7\u8fd9\u6837\u4e00\u4e2a\u5468\u671f\uff0c\u56fe\u4e2d\u7684\u7ec4\u5408\u903b\u8f91\u548c\u65f6\u5e8f\u903b\u8f91\u4fbf\u90fd\u88ab\u6d4b\u8bd5\u5230\u4e86\u3002<\/p>\n<p><strong>BIST -- \u5185\u5efa\u81ea\u6d4b\u8bd5<\/strong><\/p>\n<p>\u5185\u5efa\u81ea\u6d4b\u8bd5(BIST)\u8bbe\u8ba1\u6280\u672f\u901a\u8fc7\u5728\u82af\u7247\u7684\u8bbe\u8ba1\u4e2d\u52a0\u5165\u4e00\u4e9b\u989d\u5916\u7684\u81ea\u6d4b\u8bd5\u7535\u8def\uff0c\u6d4b\u8bd5\u65f6\u53ea\u9700\u8981\u4ece\u5916\u90e8\u65bd\u52a0\u5fc5\u8981\u7684\u63a7\u5236\u4fe1\u53f7\uff0c\u901a\u8fc7\u8fd0\u884c\u5185\u5efa\u7684\u81ea\u6d4b\u8bd5\u786c\u4ef6\u548c\u8f6f\u4ef6\uff0c\u68c0\u67e5\u88ab\u6d4b\u7535\u8def\u7684\u7f3a\u9677\u6216\u6545\u969c\u3002\u548c\u626b\u63cf\u8bbe\u8ba1\u4e0d\u540c\u7684\u662f\uff0c\u5185\u5efa\u81ea\u6d4b\u8bd5\u7684\u6d4b\u8bd5\u5411\u91cf\u4e00\u822c\u662f\u5185\u90e8\u751f\u6210\u7684\uff0c\u800c\u4e0d\u662f\u5916\u90e8\u8f93\u5165\u7684\u3002\u5185\u5efa\u81ea\u6d4b\u8bd5\u53ef\u4ee5\u7b80\u5316\u6d4b\u8bd5\u6b65\u9aa4\uff0c\u800c\u4e14\u65e0\u9700\u6602\u8d35\u7684\u6d4b\u8bd5\u4eea\u5668\u548c\u8bbe\u5907(\u5982ATE\u8bbe\u5907)\uff0c\u4f46\u5b83\u589e\u52a0\u4e86\u82af\u7247\u8bbe\u8ba1\u7684\u590d\u6742\u6027\u3002<\/p>\n<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15687\" title=\"wKgaomUjwBWAS49-AAEsqJehvQ8613\" src=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBWAS49-AAEsqJehvQ8613.png\" alt=\"wKgaomUjwBWAS49-AAEsqJehvQ8613\" width=\"720\" height=\"388\" srcset=\"http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBWAS49-AAEsqJehvQ8613.png?v=1703733943 720w, http:\/\/www.szryc.com\/wp-content\/uploads\/2023\/12\/wKgaomUjwBWAS49-AAEsqJehvQ8613-300x162.png?v=1703733943 300w\" sizes=\"(max-width: 720px) 100vw, 720px\" 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