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📄 40-scsiext25.htm

📁 关于单片机接口技术的文档
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<title>25 Pin external SCSI</title>
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<p align="center"><strong><font size="5" color="#0000FF"><u>25针外置SCSI接口</u></font></strong></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">SCSI 是 Small Computer System Interface 的缩写，外置式 25 
针接口为扫描仪等低速设备使用，接口外观为母插座：</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><font color="#008080">连接电缆插头为 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" 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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<p>　</p>

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    <th bgcolor="#0000FF"><font color="#FFFF00">Pin</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">Name</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">Dir</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">Description</font></th>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">1</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Ground</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">2</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB1</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 1</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">3</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB3</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 3</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">4</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB5</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 5</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">5</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB7</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 7</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">6</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Ground</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">7</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">/SEL</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Select</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">8</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Ground</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">9</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">TMPWR</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Termination Power</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">10</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">/RST</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Reset</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">11</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">C/D</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Control/Data</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">12</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">I/O</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Input/Output</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">13</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Ground</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">14</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB0</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 0</font></td>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">15</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB2</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 2</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">16</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB4</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 4</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">17</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">DB6</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Bus 6</font></td>
  </tr>
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    <td bgcolor="#C8C8FF"><font color="#0000FF">18</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">PARITY</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Data Parity</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">19</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Ground</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">20</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">/ATN</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Attention</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">21</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">/MSG</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Message</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">22</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">/ACK</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Acknowledge</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">23</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">BSY</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="&lt;-&gt;" WIDTH="32" HEIGHT="9"></font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">Busy</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">24</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">/REQ</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Request</font></td>
  </tr>
  <tr>
    <td bgcolor="#C8C8FF"><font color="#0000FF">25</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF">GND</font></td>
    <td bgcolor="#C8C8FF"><font color="#0000FF"><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="#0000FF">Ground</font></td>
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