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📁 http://www.edacn.net/cgi-bin/forums.cgi?forum=7&topic=9127下,则R3~R0的输出信号中会有一个为1,但我们还是是无法确定哪一个键被按下,必須要
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    </td> <td width='22' background='images\1_34.jpg'> </td>  </tr>  <tr>    <td colspan=3><img border='0' src='images\zymoban_38.jpg'></td></tr></table></tr></table> <table border='0' cellpadding='0' cellspacing='0' style='border-collapse: collapse' bordercolor='#111111' width='100%' ><tr><td width='50%' valign='top'  align='right'><table height='32' background='images/zymoban_40.jpg' border='0' cellpadding='0' cellspacing='0'  width='100%' >  <tr><td width='15'></td>    <td > &nbsp; &nbsp;<a href='flmen.asp?menuid=359&menujb=2'>AVR单片机专栏</a>  </tr></table> <table border='0' cellpadding='0' cellspacing='0' width='100%'>  <tr>   <td width='10' background='images\FGBG2.gif'> </td><td  background='images\FGBG2.gif' width='496' height=100  valign=top><table border='0' cellpadding='0' cellspacing='0' style='border-collapse: collapse' bordercolor='#C0C0C0' width='100%'><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=28&tab=软件下载'>8535单片机模拟量输入接口</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=27&tab=软件下载'>8515 扩展RAM的原理图</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=26&tab=软件下载'>AVR单片机编程特性的应用研究</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=15&tab=软件下载'>AVR器件表</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=14&tab=软件下载'>AVR器件指令表</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=13&tab=软件下载'>AVR JTAG工具 详细说明</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=12&tab=软件下载'>AVR单片机问与答</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=11&tab=软件下载'>从MCS51向AVR的快速转换</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=10&tab=软件下载'>适用于AVR系列单片机的几种C语言比较</a></td></tr><tr><td>&nbsp;<img src='upfile/20049/200492565911000.gif'>&nbsp;<a  target='_blank'  href='disp1.asp?id=9&tab=软件下载'>用AT90S8515控制两相步进电机</a></td></tr></table><table width='90%' border='0' cellpadding='0' cellspacing='0'><tr><td align='right'><a href='flmen.asp?menuid=359'>更多...</a></td></tr></table>
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                    <td width="100%"> <marquee  onmouseover=this.stop() onmouseout=this.start()   direction='up' scrolldelay='50' width='190' height='100' style='color: #; ' bgcolor='' scrollamount='2'><P><FONT color=#0000ff>单片机坐标网全面改版,支持网友上传自己的<FONT color=#ff0033><STRONG>文章</STRONG></FONT>及<STRONG><FONT color=#ff0000>图片</FONT></STRONG>,欢迎大家踊跃投稿,<FONT color=#ff0000><STRONG><U>所有老用户(没有改版前注册的用户)可以直接登陆使用文章系统及论坛系统。</U></STRONG></FONT>以前的斑竹及管理员仍然居有管理权利。希望参与管理的会员可以到论坛发帖子提交申请,并简单介绍一下自己就可以了。</FONT></P></marquee>
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