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485\u8f6cTTL\u6a21\u5757\u7684\u63a5\u7ebf\u65b9\u5f0f<\/h2>\n

  \u63a5\u7ebf\u524d\u51c6\u5907<\/h3>\n

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  2.\u5c06485\u8f6cTTL\u6a21\u5757\u7684GND\u7aef\u53e3\u8fde\u63a5\u5230\u5176\u4ed6\u8bbe\u5907\u7684GND\u7aef\u53e3\uff1b<\/p>\n

  3.\u5c06485\u8f6cTTL\u6a21\u5757\u7684VCC\u7aef\u53e3\u8fde\u63a5\u5230\u5176\u4ed6\u8bbe\u5907\u7684VCC\u7aef\u53e3\uff1b<\/p>\n

  4.\u5c06485\u8f6cTTL\u6a21\u5757\u7684485A\u7aef\u53e3\u8fde\u63a5\u5230\u5176\u4ed6\u8bbe\u5907\u7684485A\u7aef\u53e3\uff0c\u5c06485\u8f6cTTL\u6a21\u5757\u7684485B\u7aef\u53e3\u8fde\u63a5\u5230\u5176\u4ed6\u8bbe\u5907\u7684485B\u7aef\u53e3\uff1b<\/p>\n

  5.\u5c06485\u8f6cTTL\u6a21\u5757\u7684RXD+\u3001RXD-\u3001TXD+\u3001TXD-\u7aef\u53e3\u8fde\u63a5\u5230\u5176\u4ed6\u8bbe\u5907\u7684RXD+\u3001RXD-\u3001TXD+\u3001TXD-\u7aef\u53e3\uff1b<\/p>\n

  \u6ce8\u610f\u4e8b\u9879<\/h3>\n

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\u603b\u7ed3<\/h2>\n

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