{"id":30,"date":"2010-12-09T13:02:37","date_gmt":"2010-12-09T05:02:37","guid":{"rendered":"http:\/\/www.microwolf.net\/?p=30"},"modified":"2010-12-09T13:02:37","modified_gmt":"2010-12-09T05:02:37","slug":"e1%e5%b8%a7%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"http:\/\/www.microwolf.net\/?p=30","title":{"rendered":"E1\u5e27\u7ed3\u6784"},"content":{"rendered":"<table border=\"0\" width=\"100%\">\n<tr>\n<td width=\"100%\">E1\u5e27\u7ed3\u6784<\/p>\n<p>\n      E1\u5e27\u7ed3\u6784 E1\u6709\u6210\u5e27,\u6210\u590d\u5e27\u4e0e\u4e0d\u6210\u5e27\u4e09\u79cd\u65b9\u5f0f,\u5728\u6210\u5e27\u7684E1\u4e2d\u7b2c0\u65f6\u9699\u7528\u4e8e\u4f20\u8f93\u5e27\u540c\u6b65\u6570\u636e,\u5176\u4f5931\u4e2a\u65f6\u9699\u53ef\u4ee5\u7528\u4e8e\u4f20\u8f93\u6709\u6548\u6570\u636e;\u5728\u6210\u590d\u5e27\u7684E1\u4e2d,\u9664\u4e86\u7b2c0\u65f6\u9699\u5916,\u7b2c16\u65f6\u9699\u662f\u7528\u4e8e\u4f20\u8f93\u4fe1\u4ee4\u7684,\u53ea\u6709\u7b2c1\u523015,\u7b2c17\u5230\u7b2c31\u517130\u4e2a\u65f6\u9699\u53ef\u7528\u4e8e\u4f20\u8f93\u6709\u6548\u6570\u636e;\u800c\u5728\u4e0d\u6210\u5e27\u7684E1\u4e2d,\u6240\u670932\u4e2a\u65f6\u9699\u90fd\u53ef\u7528\u4e8e\u4f20\u8f93\u6709\u6548\u6570\u636e. PCM30\/31\u6307\u7684\u662f30\u548c31\u65f6\u9699\uff0cCRC\u6307\u7684\u662f\u5faa\u73af\u5197\u4f59\u6821\u9a8c\u7801\uff01 2M\u7684\u5e27\u7ed3\u6784\u67095\u79cd\uff0c\u7b2c\u4e00\u79cd\u662f\u975e\u5e27\u7ed3\u6784\uff0c\u7b2c\u4e8c\u79cd\u662fPCM30\uff0c\u7b2c\u4e09\u79cd\u662fPCM31\uff0c\u7b2c\u56db\u79cd\u662fPCM30 CRC\uff0c\u7b2c\u4e94\u79cd\u662fPCM31 CRC\u3002 <\/p>\n<p>      \uff081\uff09    \u975e\u5e27\u7ed3\u6784\u30022M\u7684\u975e\u5e27\u7ed3\u6784\u4e3b\u8981\u4f20\u9001\u7684\u662f\u6570\u636e\uff0c\u5176\u7279\u70b9\u662f\u6bcf\u4e00\u5e27\u53ea\u67091\u4e2a0\u65f6\u9699\uff0c\u5176\u4f5931\u4e2a\u65f6\u9699\u4e0d\u505a\u533a\u5206\u3002<\/p>\n<p>      \uff082\uff09    PCM30\u3002\u4e3a\u4ec0\u4e48\u4f1a\u6709PCM30\u548cPCM31\u7684\u533a\u5206\u5462\uff1f PCM30\u6700\u5927\u53ef\u4f20\u900130\u4e2a\u4fe1\u9053\u7684\u4fe1\u606f\uff0cPCM31\u6700\u5927\u53ef\u4f20\u900131\u4e2a\u4fe1\u9053\u7684\u4fe1\u606f\u3002PCM30\u4e00\u822c\u662f\u7528\u4e8e\u4f7f\u75281\u53f7\u4fe1\u4ee4\uff08\u968f\u8def\u4fe1\u4ee4\uff09\u7684\u8bdd\u52a1\u4e1a\u52a1\u3002\u4e3b\u8981\u7279\u70b9\u662f\u7b2c16\u65f6\u9699\u4f20\u90011\u53f7\u4fe1\u4ee4\u548c\u590d\u5e27\u4fe1\u53f7\u53ca\u590d\u5e27\u544a\u8b66\uff0c\u4e00\u4e2a\u590d\u5e27\u5305\u542b16\u4e2a\u5b50\u5e27\u3002<\/p>\n<p>      \uff083\uff09    PCM31\u3002PCM31\u4e00\u822c\u7528\u4e8e7\u53f7\u4fe1\u4ee4\u7535\u8def\uff08\u5373\u5171\u8def\u4fe1\u4ee4\uff09\uff0c\u5176\u7279\u70b9\u662f31\u4e2a\u65f6\u9699\u5747\u53ef\u7528\u4e8e\u4e1a\u52a1\u4fe1\u606f\u3002PCM31\u6ca1\u6709\u590d\u5e27\uff0c\u76ee\u524d\u4f7f\u7528\u76842M\u7535\u8def\u7edd\u5927\u591a\u6570\u90fd\u662f\u6b64\u7c7b\u578b\u7535\u8def\uff0c\u53e6\u5916\uff0cDDN\u7535\u8def\u4e5f\u662f\u91c7\u7528\u8be5\u7c7b\u578b\u5e27\u7ed3\u6784\u7684\u7535\u8def\u3002<\/p>\n<p>      \uff084\uff09    PCM30 CRC\u3002\u6b64\u7c7b\u5e27\u7ed3\u6784\u4e0ePCM30\u7684\u4e0d\u540c\u5728\u4e8e\u591a\u4e86CRC\u5b57\u8282\u3002<\/p>\n<p>      \uff085\uff09    PCM31 CRC\u3002\u540c\u6837\uff0c\u4e0ePCM31\u76f8\u6bd4\uff0c\u591a\u4e86CRC\u5b57\u8282\u3002\u76ee\u524d\u6211\u516c\u53f8\u4f7f\u7528\u76842M\u7535\u8def\u4e2d\uff0c\u5747\u6ca1\u6709\u52a0CRC\uff0c\u6b64\u7c7b\u7535\u8def\u4e00\u822c\u7528\u4e8e\u4e13\u7f51\uff0c\u7528\u4e8e\u5bf9\u7535\u8def\u8d28\u91cf\u8981\u6c42\u8f83\u9ad8\u7684\u7f51\u7edc\u3002<\/p>\n<p>      \u901a\u4fe1\u7535\u8def\u4e00\u822c\u5206\u4e3a2\u7ebf\u7535\u8def\u548c4\u7ebf\u7535\u8def\u30022\u7ebf\u7535\u8def\u4e00\u822c\u7528\u5728\u63a5\u5165\u7528\u6237\u65f6\uff0c\u770b\u5230\u5bb6\u91cc\u7684\u7535\u8bdd\u673a\u53ea\u67092\u6839\u7ebf\u5427\uff1f\u53d1\u8bdd\u548c\u6536\u8bdd\u90fd\u57281\u5bf9\u7ebf\uff082\u6839\uff09\u4e0a\u4f20\u9001\u7684\u3002<\/p>\n<p>      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