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USB\u7684\u5168\u79f0\u662fUniversal Serial Bus\uff0c\u6700\u591a\u53ef\u8fde\u63a5127\u53f0\u5916\u8bbe\uff0c\u7531\u4e8eUSB\u652f\u6301\u70ed\u63d2\u62d4\uff0c\u5373\u63d2\u5373\u7528\u7684\u4f18\u70b9\uff0c\u6240\u4ee5USB\u63a5\u53e3\u5df2\u7ecf\u6210\u4e3a\u626b\u63cf\u4eea\u7684\u6807\u51c6\u63a5\u53e3\u3002USB\u6709\u4e24\u4e2a\u89c4\u8303\uff0c\u5373USB1.1\u548cUSB2.0\u3002<\/p>\n
USB1.1\u662f\u76ee\u524d\u8f83\u4e3a\u666e\u904d\u7684USB\u89c4\u8303\uff0c\u5176\u9ad8\u901f\u65b9\u5f0f\u7684\u4f20\u8f93\u901f\u7387\u4e3a12Mbps\uff0c\u4f4e\u901f\u65b9\u5f0f\u7684\u4f20\u8f93\u901f\u7387\u4e3a1.5Mbps\u3002\u6ce8\u610f\uff1a\u8fd9\u91cc\u7684b\u662fBit\u7684\u610f\u601d\uff0c1MB\/s\uff08\u5146\u5b57\u8282\/\u79d2\uff09=8MBPS\uff08\u5146\u4f4d\/\u79d2\uff09\uff0c12Mbps=1.5MB\/s\u3002\u76ee\u524d\uff0c\u5bb6\u7528\u4f4e\u7aef\u626b\u63cf\u4eea\u4e3b\u8981\u4e3aUSB\u63a5\u53e3\u7c7b\u578b\u3002<\/p>\n
USB2.0\u89c4\u8303\u662f\u7531USB1.1\u89c4\u8303\u6f14\u53d8\u800c\u6765\u7684\u3002\u5b83\u7684\u4f20\u8f93\u901f\u7387\u8fbe\u5230\u4e86480Mbps\uff0c\u6298\u7b97\u4e3aMB\u4e3a60MB\/s\uff0c\u8db3\u4ee5\u6ee1\u8db3\u5927\u591a\u6570\u5916\u8bbe\u7684\u901f\u7387\u8981\u6c42\u3002USB 2.0\u4e2d\u7684\u201c\u589e\u5f3a\u4e3b\u673a\u63a7\u5236\u5668\u63a5\u53e3\u201d\uff08EHCI\uff09\u5b9a\u4e49\u4e86\u4e00\u4e2a\u4e0eUSB 1.1\u76f8\u517c\u5bb9\u7684\u67b6\u6784\u3002\u5b83\u53ef\u4ee5\u7528USB 2.0\u7684\u9a71\u52a8\u7a0b\u5e8f\u9a71\u52a8USB 1.1\u8bbe\u5907\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6240\u6709\u652f\u6301USB 1.1\u7684\u8bbe\u5907\u90fd\u53ef\u4ee5\u76f4\u63a5\u5728USB 2.0\u7684\u63a5\u53e3\u4e0a\u4f7f\u7528\u800c\u4e0d\u5fc5\u62c5\u5fc3\u517c\u5bb9\u6027\u95ee\u9898\uff0c\u800c\u4e14\u50cfUSB \u7ebf\u3001\u63d2\u5934\u7b49\u7b49\u9644\u4ef6\u4e5f\u90fd\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u3002<\/p>\n
\u73b0\u5728\u4e3b\u673a\u5747\u5e26\u6709USB\u63a5\u53e3\uff0c\u56e0\u6b64USB\u5149\u50a8\u5e94\u7528\u6781\u5176\u65b9\u4fbf\uff0c\u4f5c\u4e3a\u5916\u7f6e\u5f0f\u5149\u50a8\u8bbe\u5907\u7684\u63a5\u53e3\uff0c\u5e94\u7528\u76f8\u5f53\u7075\u6d3b\uff0c\u800c\u4e14\u4e0d\u5fc5\u518d\u4e3a\u63a5\u53e3\u589e\u52a0\u989d\u5916\u7684\u8bbe\u5907\uff0c\u51cf\u5c11\u6295\u5165\u3002<\/p>\n
——————————————————<\/p>\n
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