檢視 USB接口的原始碼

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|<center>'''USB接口'''<br><img
src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fhiphotos.baidu.com%2Fzcsz1956%2Fpic%2Fitem%2Ffeb2b346b8ac7672cffca3b0.jpg&refer=http%3A%2F%2Fhiphotos.baidu.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1671017252&t=c47a7e582ac81a2bc11943f3a3d15fc5" width="280"></center><small>  圖片來自百度</small> 
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通用串行总线（英语：Universal Serial Bus，缩写：USB）是一种串口[[总线标准]]，也是一种[[输入输出接口]]的[[技术规范]]，被广泛地应用于个人电脑和[[移动设备]]等信息通讯产品，并扩展至[[摄影器材]]、[[数字电视]]（机顶盒）、游戏机等其它相关领域。最新一代是USB4，传输速度为40Gbit/s，三段式电压5V/12V/20V，最大供电100W ，新型Type C接口允许正反盲插。 <ref>[https://baike.baidu.com/reference/493294/4e9c_hq9g7I20imFBRSsvlH3e28JSJedfcXoCDgZLSs6NfzAwfSW0ZxkhjT3W0aj6UwxtAL1dA  HKEPC，引用日期2015-01-30] </ref>