8051资源.htm

51 bian cheng bang zhu

宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>。</span></p>

<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span
style='font-size:14.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";color:red'>中断控制</span></b><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>：</span></p>

<p class=MsoNormal><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>定时器</span><span lang=EN-US>/</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>计数器控制寄存器</span> <span lang=EN-US>TCON</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>：（见上方）</span></p>

<p class=MsoNormal><span lang=EN-US>IT0</span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US>IT1</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）外部中断请求信号方式控制位，</span><span
lang=EN-US>IT0</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>（</span><span lang=EN-US>IT1</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>）</span><span lang=EN-US>=0</span><span style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>设</span><span
lang=EN-US>INT0</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>（</span><span lang=EN-US>INT1</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>）为电平触发方式低电平有效，</span></p>

<p class=MsoNormal><span lang=EN-US>IT0</span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US>IT1</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）</span><span lang=EN-US>=1</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>设</span><span lang=EN-US>INT0</span><span style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US>INT1</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）为脉冲触发方式负脉冲有效，</span><span lang=EN-US>IT0</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>（</span><span lang=EN-US>IT1</span><span style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>）为软件设定。</span></p>

<p class=MsoNormal><span lang=EN-US>IE0</span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US>IE1</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）外部中断请求标志位，</span><span lang=EN-US>IE=0</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>时外部发生请求，由</span><span lang=EN-US>CPU</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>自动置</span><span lang=EN-US>1</span><span style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，该标志由硬件自动清</span><span
lang=EN-US>0</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，但</span></p>

<p class=MsoNormal><a name=int></a><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>在电平触发方式下，在中断程序结束前必须先清除中断源，否则无法清除</span><span
lang=EN-US>IE</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，单片机复位时</span><span lang=EN-US>IE=0</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>。</span></p>

<p class=MsoNormal><span lang=EN-US>IE0----INT0</span><span style='font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，</span><span
lang=EN-US>IE1----INT1</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>。</span></p>

<p class=MsoNormal><a name=SCON></a><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>串行口控制器</span> <span
lang=EN-US><a href="8051内存.htm">SCON</a></span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>：</span></p>

<table class=MsoTableGrid border=1 cellspacing=0 cellpadding=0 align=left
 style='border-collapse:collapse;border:none;mso-border-alt:solid windowtext .5pt;
 mso-yfti-tbllook:480;mso-table-lspace:9.0pt;margin-left:6.75pt;mso-table-rspace:
 9.0pt;margin-right:6.75pt;mso-table-anchor-vertical:page;mso-table-anchor-horizontal:
 margin;mso-table-left:left;mso-table-top:150.7pt;mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
 mso-border-insideh:.5pt solid windowtext;mso-border-insidev:.5pt solid windowtext'>
 <tr style='mso-yfti-irow:0'>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span
  style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>位地址</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>9FH</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>9EH</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>9DH</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>9CH</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>9BH</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>9AH</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>99H</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-left:none;mso-border-left-alt:solid windowtext .5pt;mso-border-alt:
  solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>98H</span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:1;mso-yfti-lastrow:yes'>
  <td width=57 valign=top style='width:42.55pt;border:solid windowtext 1.0pt;
  border-top:none;mso-border-top-alt:solid windowtext .5pt;mso-border-alt:solid windowtext .5pt;
  padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>SCON</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>SM0</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>SM1</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>SM2</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>REN</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>TB8</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>TB9</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal:
  margin;mso-element-top:150.7pt;mso-height-rule:exactly'><span lang=EN-US>TI</span></p>
  </td>
  <td width=57 valign=top style='width:42.55pt;border-top:none;border-left:
  none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal style='mso-element:frame;mso-element-frame-hspace:9.0pt;
  mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-hori