8051的c.htm

51 bian cheng bang zhu

 .5pt solid windowtext;mso-border-insidev:.5pt solid windowtext'>
 <tr style='mso-yfti-irow:0'>
  <td width=227 colspan=2 valign=top style='width:6.0cm;border:solid windowtext 1.0pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal align=center style='text-align:center'><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>直</span><span style='mso-bidi-font-size:
  10.5pt'> </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
  mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>接</span><span
  style='mso-bidi-font-size:10.5pt'> </span><span style='mso-bidi-font-size:
  10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>寻</span><span style='mso-bidi-font-size:10.5pt'> </span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>址</span><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
  </td>
  <td width=385 colspan=2 valign=top style='width:288.5pt;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 align=center style='text-align:center'><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>间</span><span style='mso-bidi-font-size:
  10.5pt'> </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
  mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>接</span><span
  style='mso-bidi-font-size:10.5pt'> </span><span style='mso-bidi-font-size:
  10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>寻</span><span style='mso-bidi-font-size:10.5pt'> </span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>址</span><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:1'>
  <td width=113 valign=top style='width:3.0cm;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 align=center style='text-align:center'><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>汇编</span><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
  </td>
  <td width=113 valign=top style='width:3.0cm;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>C<o:p></o:p></span></p>
  </td>
  <td width=181 valign=top style='width:135.5pt;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 align=center style='text-align:center'><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>汇编</span><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
  </td>
  <td width=204 valign=top style='width:153.0pt;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>C<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:2'>
  <td width=113 valign=top style='width:3.0cm;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>mov n,m<o:p></o:p></span></p>
  </td>
  <td width=113 valign=top style='width:3.0cm;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>n=m<o:p></o:p></span></p>
  </td>
  <td width=181 valign=top style='width:135.5pt;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>mov Ri,data<o:p></o:p></span></p>
  </td>
  <td width=204 valign=top style='width:153.0pt;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>P=&amp;m<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:3;mso-yfti-lastrow:yes'>
  <td width=113 valign=top style='width:3.0cm;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 align=center style='text-align:center'><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>传送语句</span><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
  </td>
  <td width=113 valign=top style='width:3.0cm;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 align=center style='text-align:center'><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>赋值语句</span><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>
  </td>
  <td width=181 valign=top style='width:135.5pt;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>mov n,@Ri<o:p></o:p></span></p>
  </td>
  <td width=204 valign=top style='width:153.0pt;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 align=center style='text-align:center'><span lang=EN-US
  style='mso-bidi-font-size:10.5pt'>N=*P<o:p></o:p></span></p>
  </td>
 </tr>
</table>

<p class=MsoNormal style='text-indent:15.75pt;mso-char-indent-count:1.5'><span
lang=EN-US style='mso-bidi-font-size:10.5pt'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='text-indent:15.75pt;mso-char-indent-count:1.5'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>如果想使用指针能适用于指向任何存储空间则可定义为通用型此时指针长度为</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>3</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>字节第一字节为存</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal style='text-indent:15.75pt;mso-char-indent-count:1.5'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>储器类型编码：</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'>IDATA 1</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>；</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>XDATA
2</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>；</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>PDATA 3</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>；</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'>DATA 4</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>；</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>CODE
5</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>2</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>，</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>3</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>字节为高低地址：如：指</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal style='text-indent:15.75pt;mso-char-indent-count:1.5'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>针变量</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'>PX=0X02123</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>，表示</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>XDATA</span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>区的</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'>1203H</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>的地址单元。这样定义增加了程序长度，降低了速度</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal style='text-indent:15.75pt;mso-char-indent-count:1.5'><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>一般不用。</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal style='text-indent:21.0pt;mso-char-indent-count:1.5'><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'>存储类型：</span><span
lang=EN-US style='font-size:14.0pt;color:red'><o:p></o:p></span></p>

<table class=MsoTableGrid border=1 cellspacing=0 cellpadding=0
 style='border-collapse:collapse;border:none;mso-border-alt:solid windowtext .5pt;
 mso-yfti-tbllook:480;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=95 valign=top style='width:71.6pt;border:solid windowtext 1.0pt;
  mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
  <p class=MsoNormal align=center style='text-align:center'><span
  style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>存储类型</span></p>
  </td>
  <td width=516 valign=top style='width:387.0pt;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 align=center style='text-align:center'><span
  style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
  "Times New Roman"'>描</span><span lang=EN-US><span
  style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
  </span></span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>述</span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:1'>
  <td width=95 valign=top style='width:71.6pt;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 align=center style='text-align:center'><span lang=EN-US>data</span></p>
  </td>
  <td width=516 valign=top style='width:387.0pt;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><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>直接寻址内部数据存储区，访问速度最快（</span><span
  lang=EN-US>128byte</span><span style='font-family:宋体;mso-ascii-font-family:
  "Times New Roman";mso-hansi-font-family:"Times New Roman"'>）</span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:2'>
  <td width=95 valign=top style='width:71.6pt;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 align=center style='text-align:center'><span lang=EN-US>bdata</span></p>
  </td>
  <td width=516 valign=top style='width:387.0pt;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><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
  mso-hansi-font-family:"Times New Roman"'>可位寻址内部数据存储区，允许与字节混合访问（</span><span
  lang=EN-US>16BYTE</span><span style='font-family:宋体;mso-ascii-font-family:
  "Times New Roman";mso-hansi-font-family:"Times New Roman"'>）</span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:3'>
  <td width=95 valign=top style='width:71.6pt;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 align=center style='text-align:center'><a name=RAM></a><span
  lang=EN-US>idata</span></p>
  </td>
  <td width=516 valign=top style='width:387.0pt;border-top