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📄 01-isa.htm

📁 关于单片机接口技术的文档
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<title>ISA bus</title>
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<body bgcolor="#FFFFFF" background="back01.jpg" tppabs="http://linux.ustc.edu.cn/~xjiang/images/back01.jpg">
<p align="center"><strong><font color="#0000FF" size="5"><u>ISA 总线定义</u></font></strong></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">ISA 是 Industry Standard Architecture 的缩写</font></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">接口卡的外观</font></td>
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</table>

<p><img src="conn_busisa16m.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_busisa16m.gif" alt="62+36 PIN EDGE CONNECTOR MALE" WIDTH="378" HEIGHT="246"> </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">插槽的外观</font></td>
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<p><img src="conn_busisa16f.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_busisa16f.gif" alt="62+36 PIN EDGE CONNECTOR FEMALE" WIDTH="290" HEIGHT="65"> </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">引脚</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">定义</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">方向</font></th>
    <th bgcolor="#0000FF"><font color="#FFFF00">说明</font></th>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A1</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">/I/O 
    CH CK</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">I/O 
    channel check; active low=parity error</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A2</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D7</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 7</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A3</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D6</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 6</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A4</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D5</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 5</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A5</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D4</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 4</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A6</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D3</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 3</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A7</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D2</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 2</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A8</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D1</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 1</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A9</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">D0</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080"><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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Data 
    bit 0</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A10</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">I/O 
    CH RDY</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">I/O 
    Channel ready, pulled low to lengthen memory cycles</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A11</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">AEN</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    enable; active high when DMA controls bus</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A12</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A19</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    bit 19</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A13</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A18</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    bit 18</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A14</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A17</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    bit 17</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A15</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A16</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    bit 16</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A16</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A15</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    bit 15</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A17</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A14</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    bit 14</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A18</font></td>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A13</font></td>
    <td style="background-color: rgb(200,200,255)" 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 style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">Address 
    bit 13</font></td>
  </tr>
  <tr>
    <td style="background-color: rgb(200,200,255)" bgcolor="#C8C8FF"><font color="#008080">A19</font></td>
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