📄 69-serial9to25.htm
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<title>9 针串行口到 25 针转换器</title>
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<p align="center"><font size="5" color="#0000FF"><strong><u>9 针串行口到 25
针转换器</u></strong></font></p>
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<td width="100%" align="center" height="26" bgcolor="#FFC8AA"><font color="#000080">[ <a target="_self" href="hardware.htm" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware.htm">返回目录</a> ]</font></td>
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<p><font color="#008080">本转换口把一个 25 针的串行设备接到 9
针的串行口上，PC 一侧为 9 针母插头：</font></p>
<p><img src="conn_dsub9f.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsub9f.gif" alt="9 PIN D-SUB FEMALE" align="bottom" WIDTH="84" HEIGHT="65"><br>
<font color="#008080">到串行设备一侧为 25 针公插头：<br>
</font><img src="conn_dsub25m.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsub25m.gif" alt="25 PIN D-SUB MALE" align="bottom" WIDTH="171" HEIGHT="65"></p>
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<td width="100%" align="center" height="24" bgcolor="#C8C8FF"><font color="#000080">引脚定义</font></td>
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<th bgcolor="#0000FF"><font color="#FFFF00">9-Pin</font></th>
<th bgcolor="#0000FF"><font color="#FFFF00">25-Pin</font></th>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Carrier Detect</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">1</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">8</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Receive Data</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">2</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">3</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Transmit Data</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">3</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">2</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Data Terminal Ready</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">4</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">20</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">System Ground</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">5</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">7</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Data Set Ready</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">6</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">6</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Request to Send</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">7</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">4</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Clear to Send</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">8</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">5</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Ring Indicator</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">9</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">22</font></td>
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