{"id":544,"date":"2011-01-20T11:55:21","date_gmt":"2011-01-20T03:55:21","guid":{"rendered":"http:\/\/kaoru.tech\/?p=544"},"modified":"2011-01-20T15:09:16","modified_gmt":"2011-01-20T07:09:16","slug":"usb-specification","status":"publish","type":"post","link":"http:\/\/kaoru.tech:7000\/wordpress\/?p=544","title":{"rendered":"USB Specification"},"content":{"rendered":"<p>USB\u5206\u4e3a3\u79cd\u901f\u5ea6<\/p>\n<ul>\n<li>\u4f4e\u901f(low-speed) 1.5Mb\/s <\/li>\n<li>\u5168\u901f(full-speed) 12Mb\/s <\/li>\n<\/ul>\n<h1>\u6570\u636e\u6d41\u7c7b\u578b<\/h1>\n<h2>\u63a7\u5236\u4f20\u8f93(Control Transfers)<\/h2>\n<p>\u5f53\u8bbe\u5907\u7b2c\u4e00\u6b21\u63d2\u5165\u65f6\uff0cUSB\u7cfb\u7edf\u8f6f\u4ef6\u4f7f\u7528\u63a7\u5236\u6570\u636e\u914d\u7f6e\u8bbe\u5907\u3002\u5176\u4ed6\u9a71\u52a8\u7a0b\u5e8f\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528\u63a7\u5236\u4f20\u8f93\u5b9e\u73b0\u7279\u6b8a\u5b9e\u73b0\u3002\u6570\u636e\u4f20\u9012\u662f\u4e0d\u4f1a\u4e22\u5931\u7684\u3002<\/p>\n<h2>\u5927\u5757\u6570\u636e\u4f20\u8f93(Bulk Data Transfers)<\/h2>\n<p>\u5757\u6570\u636e\u901a\u5e38\u5305\u542b\u5927\u91cf\u7684\u6570\u636e\uff0c\u6bd4\u5982\u7528\u4e8e\u6253\u5370\u673a\u6216\u8005\u626b\u63cf\u4eea\u3002\u5757\u6570\u636e\u662f\u8fde\u7eed\u7684\u3002\u5728\u786c\u4ef6\u5c42\u4f7f\u7528\u9519\u8bef\u68c0\u6d4b\u548c\u5bfc\u5165\u6709\u9650\u7684\u91cd\u8bd5\u518c\u6570\u6765\u4fdd\u8bc1\u6570\u636e\u4ea4\u4e92\u7684\u53ef\u9760\u6027\u3002\u540c\u65f6\uff0c\u6839\u636e\u5176\u4ed6\u603b\u7ebf\u7684\u6d3b\u52a8\u6027\uff0c\u5757\u6570\u636e\u9700\u8981\u5360\u7528\u5927\u91cf\u7684\u5e26\u5bbd\u3002<\/p>\n<h2>\u4e2d\u65ad\u6570\u636e\u4f20\u8f93(Interrupt Data Transfers)<\/h2>\n<p>\u65e0\u8bba\u4f20\u8f93\u5230\u6216\u8005\u6765\u81ea\u4e00\u4e2a\u8bbe\u5907\u7684\u5fae\u5c0f\u7684\u3001\u6709\u9650\u5ef6\u65f6\u7684\u4f20\u8f93\u79f0\u4e3a\u4e2d\u65ad\u6570\u636e\u3002\u8fd9\u4e9b\u6570\u636e\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u95f4\u51c6\u5907\u4f20\u8f93\u5e76\u4e14\u5b83\u7531USB\u4ee5\u4e0d\u4f4e\u4e8e\u8bbe\u5907\u5b9a\u4e49\u7684\u901f\u5ea6\u4f20\u9001\u3002<\/p>\n<p>\u4e2d\u65ad\u6570\u636e\u901a\u5e38\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u5b57\u8282\u7684\u4e8b\u4ef6\u901a\u77e5\uff0c\u7279\u6027\u6216\u8005\u5750\u6807\u3002\u4e00\u4e2a\u4e2d\u65ad\u6570\u636e\u7684\u4f8b\u5b50\u662f\u6765\u81ea\u4e00\u4e2a\u5b9a\u4f4d\u8bbe\u5907\u7684\u5750\u6807\u3002\u5c3d\u7ba1\u6ca1\u6709\u660e\u786e\u7684\u65f6\u95f4\u901f\u7387\uff0cUSB\u5fc5\u987b\u652f\u6301\u4ea4\u4e92\u6570\u636e\u6709\u5e94\u7b54\u65f6\u95f4\u754c\u9650\u3002<\/p>\n<h2>\u7b49\u65f6\u6570\u636e\u4f20\u8f93(Isochronous Data Transfers)<\/h2>\n<p>\u7b49\u65f6\u6570\u636e\u5728\u4ea7\u751f\uff0c\u4f20\u8f93\u548c\u6d88\u8d39\u4e2d\u662f\u8fde\u7eed\u7684\u548c\u5b9e\u65f6\u7684\u3002\u7b49\u65f6\u6570\u636e\u5fc5\u987b\u4ee5\u63a5\u6536\u7684\u901f\u7387\u4f20\u9012\u4ee5\u4fdd\u8bc1\u65f6\u95f4\u3002\u53e6\u5916\u5bf9\u4e8e\u4f20\u9012\u901f\u7387\uff0c\u7b49\u65f6\u4f20\u8f93\u53ef\u80fd\u5bf9\u4f20\u9012\u5ef6\u65f6\u6bd4\u8f83\u654f\u611f\u3002\u5bf9\u4e8e\u7b49\u65f6\u7ba1\u9053\uff0c<\/p>\n","protected":false},"excerpt":{"rendered":"<p>USB\u5206\u4e3a3\u79cd\u901f\u5ea6 \u4f4e\u901f(low-speed) 1.5Mb\/s \u5168\u901f(full-speed) 12Mb\/s \u6570\u636e\u6d41\u7c7b\u578b \u63a7\u5236\u4f20\u8f93(Control Transfers) \u5f53\u8bbe\u5907\u7b2c\u4e00\u6b21\u63d2\u5165\u65f6\uff0cUSB\u7cfb\u7edf\u8f6f\u4ef6\u4f7f\u7528\u63a7\u5236\u6570\u636e\u914d\u7f6e\u8bbe\u5907\u3002\u5176\u4ed6\u9a71\u52a8\u7a0b\u5e8f\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528\u63a7\u5236\u4f20\u8f93\u5b9e\u73b0\u7279\u6b8a\u5b9e\u73b0\u3002\u6570\u636e\u4f20\u9012\u662f\u4e0d\u4f1a\u4e22\u5931\u7684\u3002 \u5927\u5757\u6570\u636e\u4f20\u8f93(Bulk Data Transfers) \u5757\u6570\u636e\u901a\u5e38\u5305\u542b\u5927\u91cf\u7684\u6570\u636e\uff0c\u6bd4\u5982\u7528\u4e8e\u6253\u5370\u673a\u6216\u8005\u626b\u63cf\u4eea\u3002\u5757\u6570\u636e\u662f\u8fde\u7eed\u7684\u3002\u5728\u786c\u4ef6\u5c42\u4f7f\u7528\u9519\u8bef\u68c0\u6d4b\u548c\u5bfc\u5165\u6709\u9650\u7684\u91cd\u8bd5\u518c\u6570\u6765\u4fdd\u8bc1\u6570\u636e\u4ea4\u4e92\u7684\u53ef\u9760\u6027\u3002\u540c\u65f6\uff0c\u6839\u636e\u5176\u4ed6\u603b\u7ebf\u7684\u6d3b\u52a8\u6027\uff0c\u5757\u6570\u636e\u9700\u8981\u5360\u7528\u5927\u91cf\u7684\u5e26\u5bbd\u3002 \u4e2d\u65ad\u6570\u636e\u4f20\u8f93(Interrupt Data Transfers) \u65e0\u8bba\u4f20\u8f93\u5230\u6216\u8005\u6765\u81ea\u4e00\u4e2a\u8bbe\u5907\u7684\u5fae\u5c0f\u7684\u3001\u6709\u9650\u5ef6\u65f6\u7684\u4f20\u8f93\u79f0\u4e3a\u4e2d\u65ad\u6570\u636e\u3002\u8fd9\u4e9b\u6570\u636e\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u95f4\u51c6\u5907\u4f20\u8f93\u5e76\u4e14\u5b83\u7531USB\u4ee5\u4e0d\u4f4e\u4e8e\u8bbe\u5907\u5b9a\u4e49\u7684\u901f\u5ea6\u4f20\u9001\u3002 \u4e2d\u65ad\u6570\u636e\u901a\u5e38\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u5b57\u8282\u7684\u4e8b\u4ef6\u901a\u77e5\uff0c\u7279\u6027\u6216\u8005\u5750\u6807\u3002\u4e00\u4e2a\u4e2d\u65ad\u6570\u636e\u7684\u4f8b\u5b50\u662f\u6765\u81ea\u4e00\u4e2a\u5b9a\u4f4d\u8bbe\u5907\u7684\u5750\u6807\u3002\u5c3d\u7ba1\u6ca1\u6709\u660e\u786e\u7684\u65f6\u95f4\u901f\u7387\uff0cUSB\u5fc5\u987b\u652f\u6301\u4ea4\u4e92\u6570\u636e\u6709\u5e94\u7b54\u65f6\u95f4\u754c\u9650\u3002 \u7b49\u65f6\u6570\u636e\u4f20\u8f93(Isochronous Data Transfers) \u7b49\u65f6\u6570\u636e\u5728\u4ea7\u751f\uff0c\u4f20\u8f93\u548c\u6d88\u8d39\u4e2d\u662f\u8fde\u7eed\u7684\u548c\u5b9e\u65f6\u7684\u3002\u7b49\u65f6\u6570\u636e\u5fc5\u987b\u4ee5\u63a5\u6536\u7684\u901f\u7387\u4f20\u9012\u4ee5\u4fdd\u8bc1\u65f6\u95f4\u3002\u53e6\u5916\u5bf9\u4e8e\u4f20\u9012\u901f\u7387\uff0c\u7b49\u65f6\u4f20\u8f93\u53ef\u80fd\u5bf9\u4f20\u9012\u5ef6\u65f6\u6bd4\u8f83\u654f\u611f\u3002\u5bf9\u4e8e\u7b49\u65f6\u7ba1\u9053\uff0c<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[21],"tags":[211,68],"class_list":["post-544","post","type-post","status-publish","format-standard","hentry","category-specification","tag-specification","tag-usb"],"_links":{"self":[{"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/544","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=544"}],"version-history":[{"count":2,"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/544\/revisions"}],"predecessor-version":[{"id":546,"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/544\/revisions\/546"}],"wp:attachment":[{"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=544"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=544"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kaoru.tech:7000\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}