{"id":749,"date":"2020-12-07T17:20:30","date_gmt":"2020-12-07T09:20:30","guid":{"rendered":"https:\/\/fick707.com\/?p=749"},"modified":"2020-12-08T16:00:52","modified_gmt":"2020-12-08T08:00:52","slug":"type-c%e6%a0%b8%e5%bf%83%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/fick707.com\/?p=749","title":{"rendered":"type-c\u6838\u5fc3\u6982\u5ff5"},"content":{"rendered":"
\u53c2\u8003\u6587\u7ae0\u94fe\u63a5<\/a><\/div>\n
\u00a0<\/div>\n
\u4e3a\u4ec0\u4e48\u53ebtype-C\uff1a<\/strong>type-C\u63a5\u53e3\u4e4b\u6240\u4ee5\u53ebtype-c\uff0c\u662f\u56e0\u4e3a\u5b83\u7684\u5f62\u5f0f\u4e0d\u540c\u4e8etype-A\u548ctype-B\uff0c\u4e0b\u56fe\u5206\u522b\u5c55\u793atype-A,type-B,type-C\u7684\u5f62\u5f0f\uff1b<\/div>\n
\n
<\/a>
\u4e0d\u540c\u7c7b\u578b\u7684\u5f62\u5f0f\u3002\u5176\u4e2d\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u4e2d\u95f4\u7684\u5f62\u5f0f\u90fd\u662ftype-B\u578b\uff1b<\/figcaption><\/figure>\n<\/div>\n
\u00a0<\/div>\n
DFP(Downstream Facing Port)<\/strong>: \u4e0b\u884c\u00a0\u7aef\u53e3<\/strong>\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3aHost\uff0cDFP\u63d0\u4f9bVBUS\uff0c\u4e5f\u53ef\u4ee5\u63d0\u4f9b\u6570\u636e\u3002\u5178\u578b\u7684DFP\u8bbe\u5907\u662f\u00a0\u7535\u6e90<\/strong>\u9002\u914d\u5668\uff0c\u56e0\u4e3a\u5b83\u6c38\u8fdc\u90fd\u53ea\u662f\u63d0\u4f9b\u7535\u6e90\u3002<\/div>\n
\u00a0<\/div>\n
UFP(Upstream Facing Port)<\/strong>: \u4e0a\u884c\u7aef\u53e3\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3aDevice\uff0cUFP\u4eceVBUS\u4e2d\u53d6\u7535\uff0c\u5e76\u53ef\u63d0\u4f9b\u6570\u636e\u3002\u5178\u578b\u8bbe\u5907\u662fU\u76d8\uff0c\u79fb\u52a8\u786c\u76d8\uff0c\u56e0\u4e3a\u5b83\u4eec\u6c38\u8fdc\u90fd\u662f\u88ab\u8bfb\u53d6\u6570\u636e\u548c\u4eceVBUS\u53d6\u7535\uff0c\u5f53\u7136\u4e0d\u6392\u9664\u672a\u6765\u53ef\u80fd\u51fa\u73b0\u53ef\u4ee5\u4f5c\u4e3a\u4e3b\u673a\u7684U\u76d8\u3002<\/div>\n
\u00a0<\/div>\n
DRP(Dual Role Port)<\/strong>: \u53cc\u89d2\u8272\u7aef\u53e3\uff0cDRP\u65e2\u53ef\u4ee5\u505aDFP(Host)\uff0c\u4e5f\u53ef\u4ee5\u505aUFP(Device)\uff0c\u4e5f\u53ef\u4ee5\u5728DFP\u4e0eUFP\u95f4\u52a8\u6001\u5207\u6362\u3002\u5178\u578b\u7684DRP\u8bbe\u5907\u662f\u7535\u8111(\u7535\u8111\u53ef\u4ee5\u4f5c\u4e3aUSB\u7684\u4e3b\u673a\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u88ab\u00a0\u5145\u7535<\/strong>\u7684\u8bbe\u5907\uff08\u82f9\u679c\u65b0\u63a8\u51fa\u7684MAC Book Air\uff09)\uff0c\u5177OTG\u529f\u80fd\u7684\u624b\u673a(\u624b\u673a\u53ef\u4ee5\u4f5c\u4e3a\u88ab\u5145\u7535\u548c\u88ab\u8bfb\u6570\u636e\u7684\u8bbe\u5907\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u4e3b\u673a\u4e3a\u5176\u4ed6\u8bbe\u5907\u63d0\u4f9b\u7535\u6e90\u6216\u8005\u8bfb\u53d6U\u76d8\u6570\u636e)\uff0c\u79fb\u52a8\u7535\u6e90(\u653e\u7535\u548c\u5145\u7535\u53ef\u901a\u8fc7\u4e00\u4e2aUSB Type-C\uff0c\u5373\u6b64\u53e3\u53ef\u4ee5\u653e\u7535\u4e5f\u53ef\u4ee5\u5145\u7535)\u3002DRP\u53ef\u4ee5\u505aDFP\u4e5f\u53ef\u4ee5\u505aUFP\u3002\u5f53DPR\u63a5\u5230UFP\uff0cDRP\u8f6c\u5316\u4e3aDFP\u3002\u5f53DRP\u63a5\u5230DFP\uff0cDRP\u8f6c\u5316\u4e3aUFP\u3002\u4e24\u4e2aDRP\u63a5\u5728\u4e00\u8d77\uff0c\u8fd9\u65f6\u5c31\u662f\u4efb\u610f\u4e00\u65b9\u4e3aDFP\uff0c\u53e6\u4e00\u65b9\u4e3aUFP\u3002<\/div>\n
\u00a0<\/div>\n
CC\uff08Configuration Channel\uff09<\/strong>\uff1a\u914d\u7f6e\u901a\u9053\uff0c\u8fd9\u662fUSB Type-C\u91cc\u65b0\u589e\u7684\u5173\u952e\u901a\u9053\uff0c\u5b83\u7684\u4f5c\u7528\u6709\u68c0\u6d4bUSB\u8fde\u63a5\uff0c\u68c0\u6d4b\u6b63\u53cd\u63d2\uff0cUSB\u8bbe\u5907\u95f4\u6570\u636e\u4e0eVBUS\u7684\u8fde\u63a5\u5efa\u7acb\u4e0e\u7ba1\u7406\u7b49\u3002<\/div>\n
\u00a0<\/div>\n
USB PD(USB Power Delivery)<\/strong>: PD\u662f\u4e00\u79cd\u901a\u4fe1\u534f\u8bae\uff0c\u5b83\u662f\u4e00\u79cd\u65b0\u7684\u7535\u6e90\u548c\u901a\u8baf\u8fde\u63a5\u65b9\u5f0f\uff0c\u5b83\u5141\u8bb8USB\u8bbe\u5907\u95f4\u4f20\u8f93\u6700\u9ad8\u81f3100W\uff0820V\/5A\uff09\u7684\u529f\u7387\uff0c\u540c\u65f6\u5b83\u53ef\u4ee5\u6539\u53d8\u7aef\u53e3\u7684\u5c5e\u6027\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7aef\u53e3\u5728DFP\u4e0eUFP\u4e4b\u95f4\u5207\u6362\uff0c\u5b83\u8fd8\u53ef\u4ee5\u4e0e\u7535\u7f06\u901a\u4fe1\uff0c\u83b7\u53d6\u7535\u7f06\u7684\u5c5e\u6027\u3002<\/div>\n
\u00a0<\/div>\n
Electronically Marked Cable<\/strong>:\u00a0\u00a0\u5c01\u88c5<\/strong>\u6709E-Marker\u82af\u7247\u7684USB Type-C\u6709\u6e90\u7535\u7f06\uff0cDFP\u548cUFP\u5229\u7528PD\u534f\u8bae\u53ef\u4ee5\u8bfb\u53d6\u8be5\u7535\u7f06\u7684\u5c5e\u6027\uff1a\u7535\u6e90\u4f20\u8f93\u80fd\u529b\uff0c\u6570\u636e\u4f20\u8f93\u80fd\u529b\uff0cID\u7b49\u4fe1\u606f\u3002\u6240\u6709\u5168\u529f\u80fd\u7684Type-C\u7535\u7f06\u90fd\u5e94\u8be5\u5c01\u88c5\u6709E-Marker\uff0c\u4f46USB2.0 Type-C\u7535\u7f06\u53ef\u4ee5\u4e0d\u5c01\u88c5E-Marker\u3002<\/div>\n
\u00a0<\/div>\n
\n
\u00a0 \u00a0 USB Type-C\u8bbe\u5907DFP-to-UFP\u914d\u7f6e\u6d41\u7a0b\u4e0eVBUS\u7ba1\u7406\u6709\u5982\u4e0b\u4e3b\u8981\u6d41\u7a0b\uff1a<\/div>\n
\u00a0<\/div>\n
\u8bbe\u5907\u8fde\u63a5\u4e0e\u5206\u5f00\u68c0\u6d4b\uff1a<\/strong>DFP\u9700\u8981\u68c0\u6d4b\u5230CC\u7ba1\u811a\u4e0a\u6709\u67d0\u4e2a\u7535\u538b\u65f6\uff0c\u5224\u65adUFP\u8bbe\u5907\u5df2\u63d2\u5165\u6216\u62d4\u51fa\uff0c\u6765\u63d0\u4f9b\u548c\u7ba1\u7406VBUS\u3002\u5f53\u6ca1\u6709UFP\u8bbe\u5907\u63d2\u5165\u65f6\uff0c\u5fc5\u987b\u5173\u95edVBUS\u3002\u56e0\u6b64\u6240\u6709\u7684DFP\u8bbe\u5907\u9700\u8981CC\u903b\u8f91\u68c0\u6d4b\u4e0e\u63a7\u5236\u82af\u7247\u3002<\/div>\n
\u00a0<\/div>\n
\u63d2\u5165\u65b9\u5411\u68c0\u6d4b\uff1a<\/strong>\u5982\u56fe1\uff0c\u867d\u7136USB Type-C\u63d2\u5ea7\u548c\u63d2\u5934\u7684\u4e24\u6392\u7ba1\u811a\u4e0a\u4e0b\u5bf9\u79f0\uff0cUSB\u6570\u636e\u4fe1\u53f7\u90fd\u6709\u4e24\u7ec4\u91cd\u590d\u7684\u901a\u9053\uff0c\u4f46\u00a0\u4e3b\u63a7\u82af\u7247<\/strong>\u901a\u5e38\u53ea\u6709\u4e00\u7ec4TX\/RX\u548cD+\/-\u901a\u9053\u3002\u7531\u4e8eUSB2.0\u7684\u6570\u636e\u7387\u6700\u9ad8\u53ea\u6709480Mbps, \u53ef\u4ee5\u4e0d\u8003\u8651\u4fe1\u53f7\u8d70\u7ebf\u7684\u00a0\u963b\u6297<\/strong>\u8fde\u7eed\u6027\u800c\u5f97\u5230\u8f83\u597d\u5730\u6570\u636e\u4f20\u8f93\u8d28\u91cf\uff0c\u56e0\u6b64USB2.0\u7684D+\/-\u4fe1\u53f7\u53ef\u4ee5\u4e0d\u88abMUX\u63a7\u5236\u800c\u76f4\u63a5\u4ece\u4e3b\u63a7\u82af\u7247\u4e00\u5206\u4e8c\u8fde\u63a5\u81f3USB Type-C\u63d2\u5ea7\u7684\u4e24\u7ec4D+\/-\u7ba1\u811a\u4e0a\u3002\u4f46USB3.0\u6216\u8005USB\u00a03.1<\/strong>\u7684\u6570\u636e\u7387\u9ad8\u8fbe5Gbps\u6216\u800510Gbps\uff0c\u5982\u679c\u4fe1\u53f7\u7ebf\u8fd8\u662f\u88ab\u7b80\u5355\u5730\u4e00\u5206\u4e8c\u7684\u8bdd\uff0c\u4e0d\u8fde\u7eed\u7684\u4fe1\u53f7\u7ebf\u963b\u6297\u5c06\u4e25\u91cd\u7834\u574f\u6570\u636e\u4f20\u8f93\u8d28\u91cf\uff0c\u56e0\u6b64\u5fc5\u987b\u7531MUX\u5207\u6362\u6765\u4fdd\u8bc1\u4fe1\u53f7\u8def\u5f84\u963b\u6297\u7684\u4e00\u81f4\u6027\uff0c\u4ee5\u786e\u4fdd\u4fe1\u53f7\u4f20\u8f93\u8d28\u91cf\u3002\u4e0b\u56fe\u4e2d\u53f3\u4fa7\u6240\u793a\u7684MUX\u4eceTX1\/RX1\u548cTX2\/RX2\u4e2d\u9009\u62e9\u4e00\u8def\u8fde\u63a5\u81f3\u4e3b\u63a7\u82af\u7247\uff0c\u800c\u8fd9\u4e2aMUX\u5c31\u5fc5\u987b\u88abCC Logic\u63a7\u5236\u3002<\/div>\n
\u65b9\u5411\u68c0\u6d4b\u7684\u903b\u8f91\uff1a<\/strong>\u5728DFP\u7684CC pin\u6709\u4e0a\u62c9\u7535\u963bRp\uff0c\u5728UFP\u6709\u4e0b\u62c9\u7535\u963bRd\u3002\u672a\u8fde\u63a5\u65f6\uff0cDFP\u7684VBUS\u662f\u65e0\u8f93\u51fa\u7684\u3002\u8fde\u63a5\u540e\uff0cCC pin\u76f8\u8fde\uff0cDFP\u7684CC pin\u4f1a\u68c0\u6d4b\u5230UFP\u7684\u4e0b\u62c9\u7535\u963bRd\uff0c\u8bf4\u660e\u8fde\u63a5\u4e0a\u4e86\uff0cDFP\u5c31\u6253\u5f00Vbus\u7535\u6e90\u5f00\u5173\uff0c\u8f93\u51fa\u7535\u6e90\u7ed9UFP\u3002\u800c\u54ea\u4e2aCC pin(CC1\uff0cCC2)\u68c0\u6d4b\u5230\u4e0b\u62c9\u7535\u963b\u5c31\u786e\u5b9a\u63a5\u53e3\u63d2\u5165\u7684\u65b9\u5411\uff0c\u987a\u4fbf\u5207\u6362RX\/TX\u3002<\/div>\n
\u56e0\u6b64\uff0c\u5728USB2.0\u5e94\u7528\u4e2d\uff0c\u65e0\u9700\u8003\u8651\u65b9\u5411\u68c0\u6d4b\u95ee\u9898\uff0c\u4f46USB3.0\u6216\u8005USB3.1\u5e94\u7528\u4e2d\uff0c\u5fc5\u987b\u8003\u8651\u65b9\u5411\u68c0\u6d4b\u95ee\u9898\u3002<\/div>\n<\/div>\n
\u00a0<\/div>\n
\n
<\/a>
\u56fe1<\/figcaption><\/figure>\n
\n
\"\"<\/a>
\u56fe2<\/figcaption><\/figure>\n

\u00a0<\/p>\n

\u00a0<\/div>\n
\u5efa\u7acbDFP-to-UFP\u548cVBUS\u7ba1\u7406\u4e0e\u68c0\u6d4b<\/strong><\/div>\n
\u00a0<\/div>\n
\u00a0 \u00a0 DRP\u5728\u5f85\u673a\u6a21\u5f0f\u4e0b\u6bcf50ms\u5728DFP\u548cUFP\u95f4\u5207\u6362\u4e00\u6b21\u3002\u5f53\u5207\u6362\u81f3DFP\u65f6\uff0cCC\u7ba1\u811a\u4e0a\u5fc5\u987b\u6709\u4e00\u4e2a\u4e0a\u62c9\u81f3VBUS\u7684\u7535\u963bRp\u6216\u8005\u8f93\u51fa\u4e00\u4e2a\u00a0\u7535\u6d41<\/strong>\u6e90\uff0c\u5f53\u5207\u6362\u81f3UFP\u65f6\uff0cCC\u7ba1\u811a\u4e0a\u5fc5\u987b\u6709\u4e00\u4e2a\u4e0b\u62c9\u81f3GND\u7684\u7535\u963bRd\u3002\u6b64\u5207\u6362\u52a8\u4f5c\u5fc5\u987b\u7531CC Logic\u82af\u7247\u6765\u5b8c\u6210\u3002<\/div>\n
\u5f53DFP\u68c0\u6d4b\u5230UFP\u63d2\u5165\u4e4b\u540e\u624d\u53ef\u4ee5\u8f93\u51faVBUS\uff0c\u5f53UFP\u62d4\u51fa\u4ee5\u540e\u5fc5\u987b\u5173\u95edVBUS\u3002\u6b64\u52a8\u4f5c\u5fc5\u987b\u7531CC Logic\u82af\u7247\u6765\u5b8c\u6210\u3002<\/div>\n<\/div>\n
\u00a0<\/div>\n
\n
USB Type-C VBUS\u7535\u6d41\u68c0\u6d4b\u4e0e\u4f7f\u7528<\/strong><\/div>\n
\u00a0<\/div>\n
\u00a0 \u00a0 USB Type-C\u4e2d\u65b0\u589e\u4e86\u7535\u6d41\u68c0\u6d4b\u4e0e\u4f7f\u7528\u529f\u80fd\uff0c\u65b0\u589e\u4e09\u79cd\u7535\u6d41\u6a21\u5f0f\uff1a\u9ed8\u8ba4\u7684USB\u00a0\u7535\u6e90\u6a21\u5f0f<\/strong>(500mA\/900mA)\uff0c1.5A\uff0c3.0A\u3002\u4e09\u79cd\u7535\u6d41\u6a21\u5f0f\u7531CC\u7ba1\u811a\u6765\u4f20\u8f93\u548c\u68c0\u6d4b\uff0c\u5bf9\u4e8e\u9700\u8981\u5e7f\u64ad\u7535\u6d41\u8f93\u51fa\u80fd\u529b\u7684DFP\u800c\u8a00\uff0c\u9700\u8981\u901a\u8fc7\u4e0d\u540c\u503c\u7684CC\u00a0\u4e0a\u62c9\u7535\u963b<\/strong>Rp\u6765\u5b9e\u73b0\uff1b\u5bf9\u4e8eUFP\u800c\u8a00\uff0c\u9700\u8981\u68c0\u6d4bCC\u7ba1\u811a\u4e0a\u7684\u7535\u538b\u503c\u6765\u83b7\u53d6\u5bf9\u65b9DFP\u7684\u7535\u6d41\u8f93\u51fa\u80fd\u529b\u3002<\/div>\n<\/div>\n
\u00a0<\/div>\n
\n
USB PD\u901a\u4fe1<\/strong><\/div>\n
\u00a0<\/div>\n
\u00a0 \u00a0 USB PD\u770b\u4f3c\u53ea\u662f\u7535\u6e90\u4f20\u8f93\u4e0e\u7ba1\u7406\u7684\u534f\u8bae\uff0c\u5b9e\u9645\u4e0a\u5b83\u53ef\u6539\u53d8\u7aef\u53e3\u89d2\u8272\uff0c\u53ef\u4e0e\u6709\u6e90\u7535\u7f06\u901a\u8baf\uff0c\u5141\u8bb8DFP\u6210\u4e3a\u53d7\u7535\u8bbe\u5907\u7b49\u8bf8\u591a\u9ad8\u7ea7\u529f\u80fd\uff0c\u56e0\u6b64\u652f\u6301PD\u7684\u8bbe\u5907\u5fc5\u987b\u91c7\u7528CC Logic\u82af\u7247\u3002<\/div>\n<\/div>\n
\u00a0<\/div>\n
\n
\u53d1\u73b0\u4e0e\u914d\u7f6e\u6269\u5c55\u5176\u4ed6\u5916\u8bbe(Audio\uff0cDebug)<\/strong><\/div>\n
\u00a0<\/div>\n
\u00a0 \u00a0 USB Type-C\u652f\u6301\u8bed\u97f3\u9644\u4ef6\u4ee5\u53caDebug\u6a21\u5f0f\uff0cUSB Type-C\u63a5\u53e3\u7684\u8033\u673a\u5982\u679c\u53ea\u4f5c\u4e3aUFP\u4e14\u56e0\u4e3a\u5176\u00a0\u529f\u8017<\/strong>\u8f83\u5c0f\u800c\u65e0\u9700\u68c0\u6d4bDFP\u7684\u4f9b\u7535\u80fd\u529b\u65f6\uff0c\u65e0\u9700CC Logic\u82af\u7247\u3002<\/div>\n
\u00a0<\/div>\n
\u00a0 \u00a0 \u7efc\u4e0a\uff0c\u6240\u6709\u7684DFP(\u5982\u7535\u6e90\u9002\u914d\u5668)\uff0c\u6240\u6709\u7684DRP(\u5982\u7535\u8111\uff0c\u624b\u673a\uff0c\u5e73\u677f\uff0c\u79fb\u52a8\u7535\u6e90), \u6240\u6709\u9700\u8981\u68c0\u6d4bDFP\u7535\u6d41\u8f93\u51fa\u80fd\u529b\u7684UFP\uff0c\u6240\u6709\u652f\u6301PD\u7684\u8bbe\u5907\uff0c\u90fd\u9700\u8981CC\u903b\u8f91\u68c0\u6d4b\u4e0e\u7aef\u53e3\u63a7\u5236\u82af\u7247\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u53ea\u6709\u56e0\u4e3a\u529f\u8017\u8f83\u4f4e\u800c\u4e0d\u9700\u8981\u68c0\u6d4b\u7535\u6d41\u80fd\u529b\u7684UFP(U\u76d8\uff0c\u8033\u673a\uff0c\u9f20\u6807\u7b49)\u624d\u4e0d\u9700\u8981CC\u903b\u8f91\u68c0\u6d4b\u7aef\u53e3\u63a7\u5236\u82af\u7247\u3002<\/div>\n<\/div>\n
\n

\u53ef\u4ee5\u770b\u5230\uff0cCC1\u548cCC2\u662f\u4e24\u4e2a\u5173\u952e\u5f15\u811a\uff0c\u4f5c\u7528\u5f88\u591a\uff1a<\/strong><\/p>\n

\u2022 \u63a2\u6d4b\u8fde\u63a5\uff0c\u533a\u5206\u6b63\u53cd\u9762\uff0c\u533a\u5206DFP\u548cUFP\uff0c\u4e5f\u5c31\u662f\u4e3b\u4ece
\u2022 \u914d\u7f6eVbus\uff0c\u6709USB Type-C\u548cUSB Power Delivery\u4e24\u79cd\u6a21\u5f0f
\u2022 \u914d\u7f6eVconn\uff0c\u5f53\u7ebf\u7f06\u91cc\u6709\u82af\u7247\u7684\u65f6\u5019\uff0c\u4e00\u4e2acc\u4f20\u8f93\u4fe1\u53f7\uff0c\u4e00\u4e2acc\u53d8\u6210\u4f9b\u7535Vconn
\u2022 \u914d\u7f6e\u5176\u4ed6\u6a21\u5f0f\uff0c\u5982\u63a5\u97f3\u9891\u914d\u4ef6\u65f6\uff0cdp\uff0cpcie\u65f6<\/p>\n

\u5de5\u4f5c\u6a21\u5f0f<\/strong><\/div>\n
\n
<\/a>
dfp to ufp<\/figcaption><\/figure>\n
\n
<\/a>
jfp to dfp<\/figcaption><\/figure>\n
\n
<\/a>
drp to drp<\/figcaption><\/figure>\n

\u00a0<\/p>\n

\u4e0a\u56feDFP (Downstream Facing Port)\u4e5f\u5c31\u662f\u4e3b\uff0cUFP (Upstream Facing Port)\u4e3a\u4ece\u3002\u9664\u4e86DFP\u3001UFP\uff0c\u8fd8\u6709\u4e2aDRP (Dual Role port)\uff0cDRP\u53ef\u4ee5\u505aDFP\u4e5f\u53ef\u4ee5\u505aUFP\u3002\u5f53DPR\u63a5\u5230UFP\uff0cDRP\u8f6c\u5316\u4e3aDFP\u3002\u5f53DRP\u63a5\u5230DFP\uff0cDRP\u8f6c\u5316\u4e3aUFP\u3002\u4e24\u4e2aDRP\u63a5\u5728\u4e00\u8d77\uff0c\u8fd9\u65f6\u5c31\u662f\u4efb\u610f\u4e00\u65b9\u4e3aDFP\uff0c\u53e6\u4e00\u65b9\u4e3aUFP\u3002<\/p>\n

\u5728DFP\u7684CC pin\u6709\u4e0a\u62c9\u7535\u963bRp\uff0c\u5728UFP\u6709\u4e0b\u62c9\u7535\u963bRd\u3002\u672a\u8fde\u63a5\u65f6\uff0cDFP\u7684VBUS\u662f\u65e0\u8f93\u51fa\u7684\u3002\u8fde\u63a5\u540e\uff0cCC pin\u76f8\u8fde\uff0cDFP\u7684CC pin\u4f1a\u68c0\u6d4b\u5230UFP\u7684\u4e0b\u62c9\u7535\u963bRd\uff0c\u8bf4\u660e\u8fde\u63a5\u4e0a\u4e86\uff0cDFP\u5c31\u6253\u5f00Vbus\u7535\u6e90\u5f00\u5173\uff0c\u8f93\u51fa\u7535\u6e90\u7ed9UFP\u3002\u800c\u54ea\u4e2aCC pin(CC1\uff0cCC2)\u68c0\u6d4b\u5230\u4e0b\u62c9\u7535\u963b\u5c31\u786e\u5b9a\u63a5\u53e3\u63d2\u5165\u7684\u65b9\u5411\uff0c\u987a\u4fbf\u5207\u6362RX\/TX\u3002<\/p>\n

\u7535\u963bRd=5.1k\uff0c\u7535\u963bRp\u4e3a\u4e0d\u786e\u5b9a\u7684\u503c\uff0c\u6839\u636e\u524d\u9762\u7684\u56fe\u770b\u5230USB Type-C\u6709\u51e0\u79cd\u4f9b\u7535\u6a21\u5f0f\uff0c\u9760\u4ec0\u4e48\u6765\u7504\u522b?\u5c31\u9760Rp\u7684\u503c\uff0cRp\u7684\u503c\u4e0d\u4e00\u6837\uff0cCC pin\u68c0\u6d4b\u5230\u7684\u7535\u538b\u5c31\u4e0d\u4e00\u6837\uff0c\u7136\u540e\u6765\u63a7\u5236DFP\u7aef\u6267\u884c\u54ea\u79cd\u4f9b\u7535\u6a21\u5f0f\u3002<\/p>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e0a\u56fe\u91cc\u753b\u4e86\u4e24\u4e2aCC\uff0c\u5b9e\u9645\u4e0a\u5728\u4e0d\u542b\u82af\u7247\u7684\u7ebf\u7f06\u91cc\u53ea\u6709\u4e00\u6839cc\u7ebf\u3002<\/p>\n

\u542b\u82af\u7247\u7684\u7ebf\u7f06\u4e5f\u4e0d\u662f\u4e24\u6839cc\u7ebf\uff0c\u800c\u662f\u4e00\u6839cc\uff0c\u4e00\u6839Vconn\uff0c\u7528\u6765\u7ed9\u7ebf\u7f06\u91cc\u7684\u82af\u7247\u4f9b\u7535(3.3V\u62165V)\uff0c\u8fd9\u65f6\u5c31cc\u7aef\u6ca1\u6709\u4e0b\u62c9\u7535\u963bRd\uff0c\u800c\u662f\u4e0b\u62c9\u7535\u963bRa\uff0c800-1200\u6b27\u3002<\/p>\n

\u5f53CC pin\u4e24\u4e2a\u90fd\u63a5\u4e86\u4e0b\u62c9\u7535\u963b<=Ra\uff0cDFP\u8fdb\u5165\u97f3\u9891\u914d\u4ef6\u6a21\u5f0f\uff0c\u5de6\u53f3\u58f0\u9053\uff0cmic\u90fd\u4ff1\u5168\uff0c\u5982\u4e0a\u56fe\u3002<\/p>\n<\/div>\n<\/div>\n\n\n

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