📄 27-vgavesaddc.htm
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<title>VGA Vesa DDc adapter</title>
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<p align="center"><font color="#0000FF" size="5"><strong><u>VGA Vesa DDC显示接口</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"> VGA 是 Video Graphics Adapter(Array)
的缩写，VESA 是 Video Electronics Standards Association 的缩写，DDC 是 Display
Data Channel 的缩写，信号类型为模拟类型，显示卡端的接口为 15
针母插座：</font></p>
<p><img src="conn_dsubhi15f.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsubhi15f.gif" alt="15 PIN HIGHDENSITY D-SUB FEMALE" WIDTH="94" HEIGHT="65"></p>
<p><font color="#008080">显示器连线端的接口为 15 针公插头：</font><br>
<img src="conn_dsubhi15m.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsubhi15m.gif" alt="15 PIN HIGHDENSITY D-SUB MALE" WIDTH="94" 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">RED</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="-->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Red Video (75 ohm, 0.7 V p-p)</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">2</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">GREEN</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="-->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Green Video (75 ohm, 0.7 V p-p)</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">3</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">BLUE</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="-->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Blue Video (75 ohm, 0.7 V p-p)</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">4</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">RES</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">-</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Reserved</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">5</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">6</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">RGND</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">Red Ground</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">7</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">GGND</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">Green Ground</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">8</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">BGND</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">Blue Ground</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">9</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">+5V</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="-->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">+5 VDC</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">10</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">SGND</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">Sync Ground</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">11</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">ID0</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowl.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowl.gif" alt="<--" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Monitor ID Bit 0 (optional)</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">12</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">SDA</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="<->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">DDC Serial Data Line</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">13</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">HSYNC or CSYNC</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="-->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Horizontal Sync (or Composite Sync)</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">14</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">VSYNC</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowr.gif" alt="-->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Vertical Sync</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">15</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">SCL</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF"><img src="arrowlr.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/arrowlr.gif" alt="<->" WIDTH="32" HEIGHT="9"></font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">DDC Data Clock Line</font></td>
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