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<title>RS-232 define</title>
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<p align="center"><font size="5" color="#0000FF"><strong><u>RS-232串行接口定义</u></strong></font></p>

<table border="0" width="100%" cellspacing="1" cellpadding="0" height="3">
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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>
  </tr>
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<p><font color="#008080">计算机侧为25针公插:</font></p>

<p><img src="conn_dsub25m.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsub25m.gif" alt="25 PIN D-SUB MALE" WIDTH="171" HEIGHT="65"> <br>
</p>

<p><font color="#008080">设备侧为25针母插:</font></p>

<p><img src="conn_dsub25f.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsub25f.gif" alt="25 PIN D-SUB FEMALE" WIDTH="171" HEIGHT="65"> </p>

<p>　</p>

<table border="0" width="100%" cellspacing="0" cellpadding="0" height="24">
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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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<p>　</p>

<table border="1" cellspacing="1">
  <tr>
    <th bgcolor="#0000FF"><font color="#FFFF00">Pin</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">Name</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">ITU-T</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">Dir</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">Description</font></th>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">1</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">101</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrow.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrow.gif" alt="---" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Shield Ground</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">2</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">TXD</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">103</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Transmit Data</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">3</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">RXD</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">104</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Receive Data</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">4</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">RTS</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">105</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Request to Send</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">5</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">CTS</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">106</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Clear to Send</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">6</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">DSR</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">107</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Data Set Ready</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">7</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">102</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrow.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrow.gif" alt="---" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">System Ground</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">8</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">CD</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">109</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Carrier Detect</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">9</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">-</font></td>
    <td bgcolor="#C8C8FF">　</td>
    <td bgcolor="#C8C8FF"><font color="#008080">-</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">RESERVED</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">10</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">-</font></td>
    <td bgcolor="#C8C8FF">　</td>
    <td bgcolor="#C8C8FF"><font color="#008080">-</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">RESERVED</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">11</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">STF</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">126</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Select Transmit Channel</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">12</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">S.CD</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">?</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Secondary Carrier Detect</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">13</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">S.CTS</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">?</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Secondary Clear to Send</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">14</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">S.TXD</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">?</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Secondary Transmit Data</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">15</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">TCK</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">114</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Transmission Signal Element Timing</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">16</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">S.RXD</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">?</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Secondary Receive Data</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">17</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">RCK</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">115</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Receiver Signal Element Timing</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">18</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">LL</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">141</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Local Loop Control</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">19</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">S.RTS</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">?</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Secondary Request to Send</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">20</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">DTR</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">108</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Data Terminal Ready</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">21</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">RL</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">140</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Remote Loop Control</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">22</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">RI</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">125</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Ring Indicator</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">23</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">DSR</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">111</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Data Signal Rate Selector</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">24</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">XCK</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">113</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="--&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Transmit Signal Element Timing</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#008080">25</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">TI</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">142</font></td>
    <td bgcolor="#C8C8FF"><font color="#008080"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="&lt;--" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#008080">Test Indicator</font></td>
  </tr>
</table>
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