<p style="text-align:left"><span style="font-size:12pt"><span style="font-family:宋体"><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">深圳市威联创电子科技有限公司紫色胶芯A母USB4.0连接器 180度直立式USB紫色胶芯A母USB4.0连接器 180度直立式USB</span></span></span></span></span></p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify">紫色胶芯A母USB4.0连接器 紫色胶芯A母USB4.0连接器 180度直立式USB紫色胶芯A母USB4.0连接器 180度直立式USB180度直立式USB紫色胶芯A母USB4.0连接器 180度直立式USB</p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify"><span style="font-size:10.5pt"><span style="background-color:#ffffff"><span style="font-family:"Times New Roman""><strong><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'"><strong>USB1.1 <span style="font-family:宋体">和</span><span style="font-family:Times New Roman">USB2.0</span></strong></span></span></strong></span></span></span></p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify"><span style="font-size:10.5pt"><span style="background-color:#ffffff"><span style="font-family:"Times New Roman""><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'">USB1.1<span style="font-family:宋体">是较为普遍的</span><span style="font-family:Times New Roman">USB</span><span style="font-family:宋体">规范，其高速方式的传输速率为</span><span style="font-family:Times New Roman">12Mbps</span><span style="font-family:宋体">，低速方式的传输速率为</span><span style="font-family:Times New Roman">1.5Mbps</span><span style="font-family:宋体">（</span><span style="font-family:Times New Roman">b</span><span style="font-family:宋体">是</span><span style="font-family:Times New Roman">Bit</span><span style="font-family:宋体">的意思），</span><span style="font-family:Times New Roman">1MB/s</span><span style="font-family:宋体">（</span></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><span style="font-family:宋体">兆字节</span></span></span><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'">/<span style="font-family:宋体">秒）</span><span style="font-family:Times New Roman">=8MBPS</span><span style="font-family:宋体">（兆位</span><span style="font-family:Times New Roman">/</span><span style="font-family:宋体">秒），</span><span style="font-family:Times New Roman">12Mbps=1.5MB/s</span><span style="font-family:宋体">。当前，大部分</span><span style="font-family:Times New Roman">MP3</span><span style="font-family:宋体">为此类接口类型。</span></span></span></span></span></span></p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify">紫色胶芯A母USB4.0连接器 180度直立式USB紫色胶芯A母USB4.0连接器 180度直立式USB</p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify"><span style="font-size:10.5pt"><span style="background-color:#ffffff"><span style="font-family:"Times New Roman""><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'">USB<span style="font-family:宋体">接紫色胶芯A母USB4.0连接器 180度直立式USB口的输出电压和电流是:</span><span style="font-family:Times New Roman">+5V 500mA </span><span style="font-family:宋体">实际上有误差，不能超过</span><span style="font-family:Times New Roman">+/-0.2V </span><span style="font-family:宋体">也就是</span><span style="font-family:Times New Roman">4.8-5.2V </span><span style="font-family:宋体">。</span></span></span></span></span></span></p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify"><span style="font-size:10.5pt"><span style="background-color:#ffffff"><span style="font-family:"Times New Roman""><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'">USB<span style="font-family:宋体">接口的</span><span style="font-family:Times New Roman">4</span><span style="font-family:宋体">根线一般是下面这样分配的:黑线:</span><span style="font-family:Times New Roman">gnd </span><span style="font-family:宋体">红线:</span></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体">VCC</span></span><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'"><span style="font-family:宋体">绿线:</span>data+ <span style="font-family:宋体">白线:</span><span style="font-family:Times New Roman">data-</span></span></span></span></span></span></p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify"><span style="font-size:10.5pt"><span style="background-color:#ffffff"><span style="font-family:"Times New Roman""><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'"><span style="font-family:宋体">需要注意的是千万不要把正负极弄反了，否则会烧掉</span>usb<span style="font-family:宋体">设备或者电脑的南桥</span></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><span style="font-family:宋体">芯片。</span></span></span></span></span></span></p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify">紫色胶芯A母USB4.0连接器 180度直立式USB紫色胶芯A母USB4.0连接器 180度直立式USB紫色胶芯A母USB4.0连接器 180度直立式USB</p>
<p style="margin-left:0pt; margin-right:0pt; text-align:justify"><span style="font-size:10.5pt"><span style="background-color:#ffffff"><span style="font-family:"Times New Roman""><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'">USB<span style="font-family:宋体">是一种常用的</span><span style="font-family:Times New Roman">pc</span><span style="font-family:宋体">接口，他只有</span><span style="font-family:Times New Roman">4</span><span style="font-family:宋体">根线，两根电源两根信号，故信号是</span></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><span style="font-family:宋体">串行传输</span></span></span><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'"><span style="font-family:宋体">的，</span></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体">USB<span style="font-family:宋体">接口</span></span></span><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'"><span style="font-family:宋体">也称为</span></span></span><span style="font-size:10.5000pt"><span style="font-family:宋体"><span style="font-family:宋体">串行口</span></span></span><span style="font-size:10.5000pt"><span style="font-family:'Times New Roman'"><span style="font-family:宋体">，</span>usb2.0<span style="font-family:宋体">的速度可以达到</span><span style="font-family:Times New Roman">480Mbps</span><span style="font-family:宋体">。可以满足各种工业和民用需要。</span></span></span></span></span></span></p>
<p style="text-align:left"> </p>
<p style="text-align:left"><span style="font-size:12pt"><span style="font-family:宋体"><span style="font-size:12.0000pt"><span style="font-family:宋体">USB2.0规范是由USB1.1规范演变而来的。它的传输速率达到了480Mbps，折算为MB为60MB/s，足以满足大多数</span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">外设</span></span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">的速率要求。</span>USB 2.0中的“增强</span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">主机</span></span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">控制器接口</span>”（EHCI）定义了一个与USB 1.1相兼容的架构。它可以用USB 2.0的</span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">驱动程序</span></span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">驱动</span>USB 1.1设备。也就是说，所有支持USB 1.1的设备都可以直接在USB 2.0的接口上使用而不必担心</span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">兼容性</span></span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">问题，而且像</span>USB 线、插头等等附件也都可以直接使用。使用USB为</span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">打印机</span></span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">应用带来的变化则是速度的大幅度提升，</span>USB接口提供了12Mbps的连接速度，相比</span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">并口</span></span></span><span style="font-size:12.0000pt"><span style="font-family:宋体"><span style="font-family:宋体">速度提高达到</span>10倍以上，在这个速度之下 打印文件传输时间大大缩减。USB 2.0标准进一步将接口速度提高到480Mbps，是普通USB速度的20倍，更大幅度降低了打印文件的传输时间。</span></span></span></span></p>