{"id":72580,"date":"2026-02-06T01:40:48","date_gmt":"2026-02-05T17:40:48","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/72580.html"},"modified":"2026-02-06T01:40:48","modified_gmt":"2026-02-05T17:40:48","slug":"usb-otg-%e5%92%8c-usb-host%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/72580.html","title":{"rendered":"USB OTG \u548c USB Host\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"<p>\u6458\u8981&#xff1a;USB Host\u8d1f\u8d23\u4f9b\u7535\u3001\u901a\u4fe1\u63a7\u5236\u548c\u8bbe\u5907\u7ba1\u7406&#xff0c;\u662fUSB\u7cfb\u7edf\u7684\u6838\u5fc3&#xff1b;USB OTG\u5219\u5141\u8bb8\u8bbe\u5907\u5728\u4e3b\u673a\u548c\u4ece\u673a\u89d2\u8272\u95f4\u7075\u6d3b\u5207\u6362&#xff0c;\u6269\u5c55\u4e86\u5e94\u7528\u573a\u666f\u3002\u4f20\u7edfUSB\u91c7\u7528\u56fa\u5b9a\u4e3b\u4ece\u5173\u7cfb&#xff0c;\u800cOTG\u901a\u8fc7ID\u5f15\u811a\u6216Type-C\u7684CC\u5f15\u811a\u5b9e\u73b0\u89d2\u8272\u8bc6\u522b\u3002\u786c\u4ef6\u4e0a&#xff0c;Host\u53ea\u9700\u5355\u5411\u4f9b\u7535&#xff0c;OTG\u9700\u53cc\u5411\u4f9b\u7535\u7ba1\u7406&#xff1b;\u8f6f\u4ef6\u4e0a&#xff0c;Host\u4fa7\u91cd\u9a71\u52a8\u5f00\u53d1&#xff0c;OTG\u8fd8\u9700\u8eab\u4efd\u5207\u6362\u903b\u8f91\u3002\u6839\u636e\u9700\u6c42\u9009\u62e9&#xff1a;\u7a33\u5b9a\u4f9b\u7535\u9009Host&#xff0c;\u7075\u6d3b\u6269\u5c55\u9009OTG\u3002<\/p>\n<p id=\"main-toc\">\u76ee\u5f55<\/p>\n<p id=\"%E4%B8%80%E3%80%81USB%20Host%20%E5%88%B0%E5%BA%95%E6%98%AF%E5%B9%B2%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%9F-toc\" style=\"margin-left:0px\">\u4e00\u3001USB Host \u5230\u5e95\u662f\u5e72\u4ec0\u4e48\u7684&#xff1f;<\/p>\n<p id=\"1.%20%E6%8F%90%E4%BE%9B%E5%8A%A8%E5%8A%9B%EF%BC%88%E4%BE%9B%E7%94%B5%E8%80%85%EF%BC%89-toc\" style=\"margin-left:40px\">1. \u63d0\u4f9b\u52a8\u529b&#xff08;\u4f9b\u7535\u8005&#xff09;<\/p>\n<p id=\"2.%20%E6%8E%8C%E7%AE%A1%E8%AF%9D%E8%AF%AD%E6%9D%83%EF%BC%88%E9%80%9A%E4%BF%A1%E5%8F%91%E8%B5%B7%E8%80%85%EF%BC%89-toc\" style=\"margin-left:40px\">2. \u638c\u7ba1\u8bdd\u8bed\u6743&#xff08;\u901a\u4fe1\u53d1\u8d77\u8005&#xff09;<\/p>\n<p id=\"3.%20%E8%B5%84%E6%BA%90%E5%88%86%E9%85%8D%E4%B8%8E%E9%A9%B1%E5%8A%A8%E7%AE%A1%E7%90%86-toc\" style=\"margin-left:40px\">3. \u8d44\u6e90\u5206\u914d\u4e0e\u9a71\u52a8\u7ba1\u7406<\/p>\n<p id=\"%E4%BA%8C%E3%80%81USB%20OTG%E6%98%AF%E5%B9%B2%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%9F-toc\" style=\"margin-left:0px\">\u4e8c\u3001USB OTG\u662f\u5e72\u4ec0\u4e48\u7684&#xff1f;<\/p>\n<p id=\"1.%E4%B8%BB%E6%9C%BA%E4%BB%8E%E6%9C%BA%E7%9A%84%E6%A6%82%E5%BF%B5%E5%AF%B9%E6%AF%94%EF%BC%9A-toc\" style=\"margin-left:40px\">1.\u4e3b\u673a\u4ece\u673a\u7684\u6982\u5ff5\u5bf9\u6bd4&#xff1a;<\/p>\n<p id=\"2.%20%E6%A0%B8%E5%BF%83%E5%AE%9A%E4%B9%89%EF%BC%9A%E5%AE%83%E6%98%AF%E6%97%A2%E5%8F%AF%E4%BB%A5%E5%BD%93%E4%B8%BB%E6%9C%BA%E4%B9%9F%E5%8F%AF%E4%BB%A5%E5%BD%93%E4%BB%8E%E6%9C%BA-toc\" style=\"margin-left:40px\">2. \u6838\u5fc3\u5b9a\u4e49&#xff1a;\u5b83\u662f\u65e2\u53ef\u4ee5\u5f53\u4e3b\u673a\u4e5f\u53ef\u4ee5\u5f53\u4ece\u673a<\/p>\n<p id=\"3.%20%E5%AE%83%E6%98%AF%E5%B9%B2%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%9F%EF%BC%88%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%EF%BC%89-toc\" style=\"margin-left:40px\">3. \u5b83\u662f\u5e72\u4ec0\u4e48\u7684&#xff1f;&#xff08;\u5e94\u7528\u573a\u666f&#xff09;<\/p>\n<p id=\"4.%20%E5%AE%83%E5%A6%82%E4%BD%95%E8%AF%86%E5%88%AB%E8%B0%81%E6%98%AFHost%EF%BC%9F-toc\" style=\"margin-left:40px\">4. \u5b83\u5982\u4f55\u8bc6\u522b\u8c01\u662fHost&#xff1f;<\/p>\n<p id=\"%E4%B8%89%E3%80%81%E6%80%8E%E4%B9%88%E6%A0%B9%E6%8D%AE%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%E5%8E%BB%E9%80%89%E6%8B%A9%E8%BF%99%E4%B8%A4%E7%A7%8DUSB-toc\" style=\"margin-left:0px\">\u4e09\u3001\u600e\u4e48\u6839\u636e\u5e94\u7528\u573a\u666f\u53bb\u9009\u62e9\u8fd9\u4e24\u79cdUSB<\/p>\n<p id=\"1.%E7%A1%AC%E4%BB%B6%E7%94%B5%E8%B7%AF%E5%A4%8D%E6%9D%82%E6%80%A7-toc\" style=\"margin-left:40px\">1.\u786c\u4ef6\u7535\u8def\u590d\u6742\u6027<\/p>\n<p id=\"%E4%BE%9B%E7%94%B5%E9%80%BB%E8%BE%91%E7%9A%84%E5%8C%BA%E5%88%AB%EF%BC%88%E8%BF%99%E5%85%B3%E7%B3%BB%E5%88%B0%E4%BD%A0%E4%BC%9A%E4%B8%8D%E4%BC%9A%E7%83%A7%E8%AE%BE%E5%A4%87%EF%BC%89-toc\" style=\"margin-left:80px\">\u4f9b\u7535\u903b\u8f91\u7684\u533a\u522b&#xff08;\u8fd9\u5173\u7cfb\u5230\u4f60\u4f1a\u4e0d\u4f1a\u70e7\u8bbe\u5907&#xff09;<\/p>\n<p id=\"2.%E8%BD%AF%E4%BB%B6%E5%BC%80%E5%8F%91%E9%9A%BE%E5%BA%A6-toc\" style=\"margin-left:40px\">2.\u8f6f\u4ef6\u5f00\u53d1\u96be\u5ea6<\/p>\n<p id=\"3.%E6%80%BB%E7%BB%93%EF%BC%9A-toc\" style=\"margin-left:40px\">3.\u603b\u7ed3&#xff1a;<\/p>\n<hr id=\"hr-toc\" \/>\n<p>\u5728 USB \u7684\u4e16\u754c\u91cc&#xff0c;\u5fc5\u987b\u6709\u4e00\u4e2a\u201c\u4e3b\u4eba&#xff08;Host&#xff09;\u201d\u6765\u53d1\u53f7\u65bd\u4ee4&#xff0c;\u90a3\u4e9b\u201c\u4ece\u673a&#xff08;Device&#xff0c;\u6bd4\u5982\u9f20\u6807\u3001U\u76d8&#xff09;\u201d\u624d\u80fd\u5e72\u6d3b\u3002<\/p>\n<hr \/>\n<h2 id=\"%E4%B8%80%E3%80%81USB%20Host%20%E5%88%B0%E5%BA%95%E6%98%AF%E5%B9%B2%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%9F\">\u4e00\u3001USB Host \u5230\u5e95\u662f\u5e72\u4ec0\u4e48\u7684&#xff1f;<\/h2>\n<h3 id=\"1.%20%E6%8F%90%E4%BE%9B%E5%8A%A8%E5%8A%9B%EF%BC%88%E4%BE%9B%E7%94%B5%E8%80%85%EF%BC%89\">1. \u63d0\u4f9b\u52a8\u529b&#xff08;\u4f9b\u7535\u8005&#xff09;<\/h3>\n<p>USB Host \u8d1f\u8d23\u901a\u8fc7 USB \u7ebf\u7f06\u7684 VBUS \u5f15\u811a\u5411\u5916\u8f93\u51fa 5V \u7535\u6e90\u3002<\/p>\n<ul>\n<li>\n<p>\u5f53\u4f60\u628a U \u76d8\u63d2\u8fdb\u7535\u8111\u65f6&#xff0c;U \u76d8\u4e4b\u6240\u4ee5\u80fd\u4eae\u706f\u3001\u5de5\u4f5c&#xff0c;\u5168\u9760\u7535\u8111\u8fd9\u4e2a Host \u4f9b\u7535\u3002<\/p>\n<\/li>\n<\/ul>\n<h3 id=\"2.%20%E6%8E%8C%E7%AE%A1%E8%AF%9D%E8%AF%AD%E6%9D%83%EF%BC%88%E9%80%9A%E4%BF%A1%E5%8F%91%E8%B5%B7%E8%80%85%EF%BC%89\">2. \u638c\u7ba1\u8bdd\u8bed\u6743&#xff08;\u901a\u4fe1\u53d1\u8d77\u8005&#xff09;<\/h3>\n<p>\u5728 USB \u534f\u8bae\u4e2d&#xff0c;\u4ece\u673a&#xff08;Device&#xff09;\u662f\u4e0d\u80fd\u4e3b\u52a8\u8bf4\u8bdd\u7684\u3002<\/p>\n<ul>\n<li>\n<p>Host \u4f1a\u4e0d\u505c\u5730\u201c\u8f6e\u8be2\u201d\u6bcf\u4e00\u4e2a\u5916\u8bbe&#xff1a;\u201c\u952e\u76d8&#xff0c;\u4f60\u6709\u6309\u952e\u88ab\u6309\u4e0b\u5417&#xff1f;\u201d\u201c\u9f20\u6807&#xff0c;\u4f60\u79fb\u52a8\u4e86\u5417&#xff1f;\u201d<\/p>\n<\/li>\n<li>\n<p>\u53ea\u6709\u5f53 Host \u95ee\u5230\u5b83\u65f6&#xff0c;\u5916\u8bbe\u624d\u80fd\u5f00\u53e3\u4f20\u6570\u636e\u3002\u5982\u679c\u6ca1\u6709 Host&#xff0c;\u4e24\u4e2a U \u76d8\u5c31\u7b97\u80cc\u9760\u80cc\u8fde\u5728\u4e00\u8d77&#xff0c;\u4e5f\u65e0\u6cd5\u4e92\u76f8\u4f20\u6570\u636e\u3002<\/p>\n<\/li>\n<\/ul>\n<h3 id=\"3.%20%E8%B5%84%E6%BA%90%E5%88%86%E9%85%8D%E4%B8%8E%E9%A9%B1%E5%8A%A8%E7%AE%A1%E7%90%86\">3. \u8d44\u6e90\u5206\u914d\u4e0e\u9a71\u52a8\u7ba1\u7406<\/h3>\n<ul>\n<li>\n<p>\u8bc6\u522b&#xff1a; \u5f53\u4f60\u63d2\u4e0a\u4e00\u4e2a\u65b0\u8bbe\u5907&#xff0c;Host \u8d1f\u8d23\u8be2\u95ee&#xff1a;\u201c\u4f60\u662f\u8c01&#xff1f;\u4f60\u80fd\u5e72\u4ec0\u4e48&#xff1f;\u201d&#xff08;\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u679a\u4e3e&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u7ffb\u8bd1&#xff1a; Host \u5fc5\u987b\u5185\u7f6e\u5bf9\u5e94\u7684\u9a71\u52a8\u7a0b\u5e8f\u3002\u6bd4\u5982\u4f60\u63a5\u4e2a\u6253\u5370\u673a&#xff0c;Host \u8981\u61c2\u6253\u5370\u673a\u7684\u8bed\u8a00&#xff0c;\u6570\u636e\u624d\u80fd\u4f20\u8fc7\u53bb\u3002<\/p>\n<\/li>\n<\/ul>\n<h2 id=\"%E4%BA%8C%E3%80%81USB%20OTG%E6%98%AF%E5%B9%B2%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%9F\">\u4e8c\u3001USB OTG\u662f\u5e72\u4ec0\u4e48\u7684&#xff1f;<\/h2>\n<p>USB OTG (On-The-Go) \u662f USB \u6280\u672f\u7684\u4e00\u79cd\u8fdb\u5316&#xff0c;\u5b83\u6253\u7834\u4e86\u4f20\u7edf USB \u8bbe\u5907\u201c\u975e\u4e3b\u5373\u4ece\u201d\u7684\u6b7b\u677f\u5173\u7cfb&#xff0c;\u8ba9\u4e00\u4e2a\u8bbe\u5907\u80fd\u591f\u6839\u636e\u9700\u8981\u7075\u6d3b\u5207\u6362\u89d2\u8272\u3002<\/p>\n<h3 id=\"1.%E4%B8%BB%E6%9C%BA%E4%BB%8E%E6%9C%BA%E7%9A%84%E6%A6%82%E5%BF%B5%E5%AF%B9%E6%AF%94%EF%BC%9A\">1.\u4e3b\u673a\u4ece\u673a\u7684\u6982\u5ff5\u5bf9\u6bd4&#xff1a;<\/h3>\n<table>\n<tr>\n<td>\u7279\u6027<\/td>\n<td>USB Host (\u4e3b\u673a)<\/td>\n<td>USB Device (\u4ece\u673a\/\u5916\u8bbe)<\/td>\n<\/tr>\n<tbody>\n<tr>\n<td>\u7269\u7406\u63a5\u53e3<\/td>\n<td>\u901a\u5e38\u662f Type-A \u6bcd\u5ea7&#xff08;\u5927\u53e3&#xff09;<\/td>\n<td>\u901a\u5e38\u662f\u5404\u79cd\u5c0f\u53e3&#xff08;Micro, Type-B&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u4f9b\u7535\u903b\u8f91<\/td>\n<td>\u8f93\u51fa 5V \u7535\u6e90<\/td>\n<td>\u6d88\u8017 5V \u7535\u6e90<\/td>\n<\/tr>\n<tr>\n<td>\u4e3b\u52a8\u6027<\/td>\n<td>\u638c\u63e1\u4e3b\u52a8\u6743&#xff0c;\u53d1\u8d77\u6240\u6709\u8bf7\u6c42<\/td>\n<td>\u88ab\u52a8\u54cd\u5e94&#xff0c;\u4e0d\u80fd\u4e3b\u52a8\u53d1\u6570\u636e<\/td>\n<\/tr>\n<tr>\n<td>\u590d\u6742\u5ea6<\/td>\n<td>\u8f6f\u4ef6\u903b\u8f91\u590d\u6742&#xff0c;\u9700\u52a0\u8f7d\u9a71\u52a8<\/td>\n<td>\u8f6f\u4ef6\u903b\u8f91\u7b80\u5355&#xff0c;\u53ea\u9700\u54cd\u5e94\u6307\u4ee4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"2.%20%E6%A0%B8%E5%BF%83%E5%AE%9A%E4%B9%89%EF%BC%9A%E5%AE%83%E6%98%AF%E6%97%A2%E5%8F%AF%E4%BB%A5%E5%BD%93%E4%B8%BB%E6%9C%BA%E4%B9%9F%E5%8F%AF%E4%BB%A5%E5%BD%93%E4%BB%8E%E6%9C%BA\">2. \u6838\u5fc3\u5b9a\u4e49&#xff1a;\u5b83\u662f\u65e2\u53ef\u4ee5\u5f53\u4e3b\u673a\u4e5f\u53ef\u4ee5\u5f53\u4ece\u673a<\/h3>\n<p>\u5728\u4f20\u7edf\u7684 USB \u4e16\u754c\u91cc&#xff0c;\u8eab\u4efd\u662f\u56fa\u5b9a\u7684&#xff1a;<\/p>\n<ul>\n<li>\n<p>Host&#xff08;\u4e3b\u673a&#xff09;&#xff1a; \u6bd4\u5982\u7535\u8111&#xff0c;\u5b83\u662f\u5927\u8111&#xff0c;\u8d1f\u8d23\u63a7\u573a\u548c\u4f9b\u7535\u3002<\/p>\n<\/li>\n<li>\n<p>Device&#xff08;\u5916\u8bbe&#xff09;&#xff1a; \u6bd4\u5982\u9f20\u6807\u3001U \u76d8&#xff0c;\u5b83\u4eec\u662f\u542c\u547d\u884c\u4e8b\u7684\u3002<\/p>\n<\/li>\n<\/ul>\n<p>USB OTG \u7684\u51fa\u73b0&#xff0c;\u8ba9\u539f\u672c\u53ea\u80fd\u5f53\u201c\u5916\u8bbe\u201d\u7684\u8bbe\u5907&#xff08;\u6bd4\u5982\u4f60\u7684\u624b\u673a\u6216\u5355\u7247\u673a&#xff09;\u4e5f\u80fd\u4e34\u65f6\u5f53\u4e00\u56de\u201c\u4e3b\u673a\u201d\u3002<\/p>\n<hr \/>\n<h3 id=\"3.%20%E5%AE%83%E6%98%AF%E5%B9%B2%E4%BB%80%E4%B9%88%E7%9A%84%EF%BC%9F%EF%BC%88%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%EF%BC%89\">3. \u5b83\u662f\u5e72\u4ec0\u4e48\u7684&#xff1f;&#xff08;\u5e94\u7528\u573a\u666f&#xff09;<\/h3>\n<p>\u5982\u679c\u6ca1\u6709 OTG&#xff0c;\u4f60\u7684\u8bbe\u522b\u53ea\u80fd\u63d2\u5728\u7535\u8111\u4e0a\u88ab\u7535\u8111\u8bfb\u53d6\u6570\u636e&#xff1b;\u6709\u4e86 OTG&#xff0c;\u4f60\u7684\u8bbe\u5907\u5c31\u80fd\u53d8\u8eab\u6210\u201c\u7535\u8111\u201d&#xff0c;\u53bb\u8bfb\u53d6\u522b\u4eba\u7684\u6570\u636e&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u624b\u673a\u63a5 U \u76d8&#xff1a; \u76f4\u63a5\u5728\u624b\u673a\u4e0a\u6269\u5bb9\u3002<\/p>\n<\/li>\n<li>\n<p>\u624b\u673a\u63a5\u5916\u8bbe&#xff1a; \u63d2\u4e0a\u9f20\u6807\u3001\u952e\u76d8&#xff0c;\u628a\u624b\u673a\u5f53\u7535\u8111\u7528&#xff1b;\u6216\u8005\u63a5\u4e0a\u6e38\u620f\u624b\u67c4\u3002<\/p>\n<\/li>\n<li>\n<p>\u76f8\u673a\u4f20\u7167\u7247&#xff1a; \u6570\u7801\u76f8\u673a\u901a\u8fc7 OTG \u76f4\u63a5\u628a\u7167\u7247\u4f20\u7ed9\u6253\u5370\u673a&#xff0c;\u4e0d\u9700\u8981\u7ecf\u8fc7\u7535\u8111\u3002<\/p>\n<\/li>\n<li>\n<p>\u5355\u7247\u673a\u5f00\u53d1&#xff1a; \u4f60\u7684\u5355\u7247\u673a\u53ef\u4ee5\u901a\u8fc7 OTG \u53e3\u63a5 U \u76d8\u5b58\u50a8\u65e5\u5fd7&#xff0c;\u4e5f\u53ef\u4ee5\u901a\u8fc7\u540c\u4e00\u4e2a\u53e3\u63a5\u7535\u8111\u6765\u66f4\u65b0\u4ee3\u7801\u3002<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h3 id=\"4.%20%E5%AE%83%E5%A6%82%E4%BD%95%E8%AF%86%E5%88%AB%E8%B0%81%E6%98%AFHost%EF%BC%9F\">4. \u5b83\u5982\u4f55\u8bc6\u522b\u8c01\u662fHost&#xff1f;<\/h3>\n<p>\u5728\u4f20\u7edf\u7684 Micro-USB \u63a5\u53e3\u4e2d&#xff0c;OTG \u5de7\u5999\u5730\u5229\u7528\u4e86\u7b2c 5 \u6839\u5f15\u811a\u2014\u2014ID \u5f15\u811a&#xff1a;<\/p>\n<li>\n<p>\u5f53 ID \u5f15\u811a\u63a5\u5730 (GND)&#xff1a; \u8bbe\u5907\u610f\u8bc6\u5230\u81ea\u5df1\u88ab\u63d2\u4e0a\u4e86\u4e00\u4e2a OTG \u8f6c\u63a5\u5934&#xff0c;\u5b83\u4f1a\u53d8\u8eab\u4e3a Host&#xff08;\u4e3b\u673a\u6a21\u5f0f&#xff09;&#xff0c;\u5f00\u59cb\u5411\u5916\u8f93\u51fa 5V \u7535\u6e90&#xff0c;\u5e76\u5bfb\u627e\u63a5\u5165\u7684\u5916\u8bbe\u3002<\/p>\n<\/li>\n<li>\n<p>\u5f53 ID \u5f15\u811a\u60ac\u7a7a (Floating)&#xff1a; \u8bbe\u5907\u4fdd\u6301 Device&#xff08;\u4ece\u673a\u6a21\u5f0f&#xff09;&#xff0c;\u7b49\u7740\u88ab\u7535\u8111\u8fde\u63a5&#xff0c;\u5e76\u4ece\u5916\u754c\u83b7\u53d6\u7535\u6e90\u3002<\/p>\n<\/li>\n<p>\u6ce8\u610f&#xff1a; \u5728\u73b0\u4ee3\u7684 USB Type-C \u63a5\u53e3\u4e2d&#xff0c;\u8fd9\u79cd\u68c0\u6d4b\u53d8\u5f97\u66f4\u667a\u80fd\u4e86&#xff0c;\u5b83\u901a\u8fc7 CC \u5f15\u811a\u8fdb\u884c\u590d\u6742\u7684\u534f\u8bae\u6c9f\u901a&#xff08;DRP &#8211; Dual Role Power&#xff09;&#xff0c;\u4e0d\u518d\u9700\u8981\u7269\u7406\u4e0a\u7684 ID \u811a\u63a5\u5730\u3002<\/p>\n<h2 id=\"%E4%B8%89%E3%80%81%E6%80%8E%E4%B9%88%E6%A0%B9%E6%8D%AE%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%E5%8E%BB%E9%80%89%E6%8B%A9%E8%BF%99%E4%B8%A4%E7%A7%8DUSB\">\u4e09\u3001\u600e\u4e48\u6839\u636e\u5e94\u7528\u573a\u666f\u53bb\u9009\u62e9\u8fd9\u4e24\u79cdUSB<\/h2>\n<table>\n<tr>\n<td>\u7279\u6027<\/td>\n<td>USB Host<\/td>\n<td>USB OTG<\/td>\n<\/tr>\n<tbody>\n<tr>\n<td>\u5f15\u811a\u6570<\/td>\n<td>4 \u6839\u7ebf (VCC, D&#043;, D-, GND)<\/td>\n<td>5 \u6839\u7ebf (\u591a\u4e86 ID \u5f15\u811a)<\/td>\n<\/tr>\n<tr>\n<td>\u7269\u7406\u63a5\u53e3<\/td>\n<td>\u901a\u5e38\u662f Type-A (\u5927\u53e3)<\/td>\n<td>\u901a\u5e38\u662f Type-C \u6216 Micro-USB<\/td>\n<\/tr>\n<tr>\n<td>ID \u5f15\u811a\u4f5c\u7528<\/td>\n<td>\u65e0\u9700 ID \u5f15\u811a<\/td>\n<td>\u5173\u952e&#xff01; ID \u63a5\u5730\u53d8\u4e3b\u673a&#xff0c;\u60ac\u7a7a\u53d8\u4ece\u673a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"1.%E7%A1%AC%E4%BB%B6%E7%94%B5%E8%B7%AF%E5%A4%8D%E6%9D%82%E6%80%A7\">1.\u786c\u4ef6\u7535\u8def\u590d\u6742\u6027<\/h3>\n<h4 id=\"%E4%BE%9B%E7%94%B5%E9%80%BB%E8%BE%91%E7%9A%84%E5%8C%BA%E5%88%AB%EF%BC%88%E8%BF%99%E5%85%B3%E7%B3%BB%E5%88%B0%E4%BD%A0%E4%BC%9A%E4%B8%8D%E4%BC%9A%E7%83%A7%E8%AE%BE%E5%A4%87%EF%BC%89\">\u4f9b\u7535\u903b\u8f91\u7684\u533a\u522b&#xff08;\u8fd9\u5173\u7cfb\u5230\u4f60\u4f1a\u4e0d\u4f1a\u70e7\u8bbe\u5907&#xff09;<\/h4>\n<ul>\n<li>\n<p>USB Host&#xff1a; \u7535\u8def\u8bbe\u8ba1\u6bd4\u8f83\u7b80\u5355&#xff0c;\u5b83\u59cb\u7ec8\u4ece VBUS \u7ebf\u4e0a\u5f80\u5916\u63a8 5V \u7535\u538b\u3002\u4e0d\u9700\u8981\u8003\u8651\u522b\u4eba\u7ed9\u5b83\u4f9b\u7535\u7684\u60c5\u51b5\u3002<\/p>\n<\/li>\n<li>\n<p>USB OTG&#xff1a; \u7535\u8def\u8bbe\u8ba1\u66f4\u590d\u6742\u3002\u5b83\u5fc5\u987b\u5177\u5907\u53cc\u5411\u4f9b\u7535\u7ba1\u7406\u7684\u80fd\u529b&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5f53\u5b83\u68c0\u6d4b\u5230\u81ea\u5df1\u662f\u4e3b\u673a\u65f6&#xff0c;\u5b83\u8981\u542f\u52a8\u5347\u538b\u7535\u8def&#xff08;Boost&#xff09;\u7ed9\u4f20\u611f\u5668\u8f93\u51fa 5V\u3002<\/p>\n<\/li>\n<li>\n<p>\u5f53\u5b83\u68c0\u6d4b\u5230\u81ea\u5df1\u662f\u4ece\u673a&#xff08;\u63a5\u7535\u8111&#xff09;\u65f6&#xff0c;\u5b83\u8981\u5173\u95ed\u81ea\u5df1\u7684\u7535\u6e90\u8f93\u51fa&#xff0c;\u6539\u4e3a\u63a5\u6536\u7535\u8111\u4f20\u6765\u7684 5V\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3 id=\"2.%E8%BD%AF%E4%BB%B6%E5%BC%80%E5%8F%91%E9%9A%BE%E5%BA%A6\">2.\u8f6f\u4ef6\u5f00\u53d1\u96be\u5ea6<\/h3>\n<ul>\n<li>\n<p>USB Host&#xff1a; \u8f6f\u4ef6\u53ea\u9700\u8981\u5199\u597d\u201c\u5982\u4f55\u8bfb\u53d6\u5916\u8bbe\u201d\u7684\u9a71\u52a8\u5e93&#xff08;\u5982 HID \u6216 MSC&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>USB OTG&#xff1a; \u9664\u4e86\u8bfb\u5916\u8bbe&#xff0c;\u4f60\u8fd8\u5f97\u5199\u4e00\u5957\u201c\u8bbe\u5907\u8bc6\u522b\u201d\u903b\u8f91&#xff0c;\u786e\u4fdd\u7a0b\u5e8f\u80fd\u6839\u636e\u786c\u4ef6\u8fde\u63a5\u81ea\u52a8\u5207\u6362\u8eab\u4efd\u3002<\/p>\n<\/li>\n<\/ul>\n<h3 id=\"3.%E6%80%BB%E7%BB%93%EF%BC%9A\">3.\u603b\u7ed3&#xff1a;<\/h3>\n<ul>\n<li>\n<p>\u5982\u679c\u4f60\u53ea\u8ffd\u6c42\u7a33\u5b9a&#xff1a; \u9009 USB Host\u3002\u5b83\u7684\u786c\u4ef6\u7535\u8def\u66f4\u786c\u6838&#xff0c;\u4f9b\u7535\u66f4\u7a33\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u4f60\u5e0c\u671b\u8bbe\u5907\u4ee5\u540e\u80fd\u63a5\u7535\u8111&#xff1a; \u9009 USB OTG\u3002\u867d\u7136\u7535\u8def\u7a0d\u5fae\u590d\u6742\u70b9&#xff0c;\u4f46\u5b83\u80fd\u8ba9\u4f60\u7684\u5355\u7247\u673a\u5728\u201c\u91c7\u96c6\u5668\u201d\u548c\u201c\u88ab\u8bfb\u53d6\u8bbe\u5907\u201d\u4e4b\u95f4\u81ea\u7531\u5207\u6362\u3002<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6458\u8981&#xff1a;USB Host\u8d1f\u8d23\u4f9b\u7535\u3001\u901a\u4fe1\u63a7\u5236\u548c\u8bbe\u5907\u7ba1\u7406&#xff0c;\u662fUSB\u7cfb\u7edf\u7684\u6838\u5fc3&#xff1b;USB OTG\u5219\u5141\u8bb8\u8bbe\u5907\u5728\u4e3b\u673a\u548c\u4ece\u673a\u89d2\u8272\u95f4\u7075\u6d3b\u5207\u6362&#xff0c;\u6269\u5c55\u4e86\u5e94\u7528\u573a\u666f\u3002\u4f20\u7edfUSB\u91c7\u7528\u56fa\u5b9a\u4e3b\u4ece\u5173\u7cfb&#xff0c;\u800cOTG\u901a\u8fc7ID\u5f15\u811a\u6216Type-C\u7684CC\u5f15\u811a\u5b9e\u73b0\u89d2\u8272\u8bc6\u522b\u3002\u786c\u4ef6\u4e0a&#xff0c;Host\u53ea\u9700\u5355\u5411\u4f9b\u7535&#xff0c;OTG\u9700\u53cc\u5411\u4f9b\u7535\u7ba1\u7406&#xff1b;\u8f6f\u4ef6\u4e0a&#xff0c;Host\u4fa7\u91cd\u9a71\u52a8\u5f00\u53d1&#xff0c;OTG\u8fd8\u9700\u8eab\u4efd\u5207\u6362\u903b\u8f91\u3002\u6839\u636e\u9700\u6c42<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[4009,270,219,996],"topic":[],"class_list":["post-72580","post","type-post","status-publish","format-standard","hentry","category-server","tag-usb","tag-270","tag-219","tag-996"],"yoast_head":"<!-- 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