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lang=EN-US style='font-size:14.0pt;color:red'><o:p></o:p></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"'>锯齿波</span><span lang=EN-US>C51</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>#include&lt;reg51.h&gt;</span></p>

<p class=MsoNormal><span lang=EN-US>#include&lt;absacc.h&gt;</span></p>

<p class=MsoNormal><span lang=EN-US>#define da0832 XBYTE[0x7fff]</span></p>

<p class=MsoNormal><span lang=EN-US>main()</span></p>

<p class=MsoNormal><span lang=EN-US>{</span></p>

<p class=MsoNormal><span lang=EN-US>unsigned char i,j;</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US>while</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US>{</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US>for(i=0;i&lt;255;i++)</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US><span style='mso-spacerun:yes'>&nbsp; </span>{</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US><span style='mso-spacerun:yes'>&nbsp;&nbsp; </span>da0832=i;<span
style='mso-spacerun:yes'>&nbsp; </span>/*</span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>启动转换</span><span
lang=EN-US>*/</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US><span style='mso-spacerun:yes'>&nbsp;&nbsp;
</span>for(j=0;j&lt;255;j++); /*</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>延时</span><span
lang=EN-US>*/</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US><span style='mso-spacerun:yes'>&nbsp; </span>}</span></p>

<p class=MsoNormal style='text-indent:10.5pt;mso-char-indent-count:1.0'><span
lang=EN-US>}</span></p>

<p class=MsoNormal><span lang=EN-US>}</span></p>

<p class=MsoNormal><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'>双缓冲方式：</span><span
lang=EN-US style='font-size:14.0pt;color:red'><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;color:red'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US>MOV DPTR</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>#7FF8H</span></p>

<p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_s1026" type="#_x0000_t75"
 style='position:absolute;left:0;text-align:left;margin-left:0;margin-top:0;
 width:408.75pt;height:374.25pt;z-index:1;mso-position-horizontal:left;
 mso-position-vertical:top;mso-position-vertical-relative:line' o:allowoverlap="f">
 <v:imagedata src="外部资源.files/image021.png" o:title="80311"/>
 <w:wrap type="square"/>
</v:shape><![endif]--><![if !vml]><img width=545 height=499
src="外部资源.files/image022.jpg" align=left hspace=12 v:shapes="_x0000_s1026"><![endif]><span
lang=EN-US>MOV A</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>#DATA1</span></p>

<p class=MsoNormal><span lang=EN-US>MOV @DPTR,A</span></p>

<p class=MsoNormal><span lang=EN-US>/*#DATA1</span><span lang=EN-US
style='font-family:Wingdings;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";mso-char-type:symbol;mso-symbol-font-family:
Wingdings'><span style='mso-char-type:symbol;mso-symbol-font-family:Wingdings'>à</span></span><span
lang=EN-US>0832</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"'>）</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"'>的输入寄存器</span><span lang=EN-US>*/</span></p>

<p class=MsoNormal><span lang=EN-US>INC DPTR</span></p>

<p class=MsoNormal><span lang=EN-US>MOV A</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>#DATA2</span></p>

<p class=MsoNormal><span lang=EN-US>MOV @DPTR,A</span></p>

<p class=MsoNormal><span lang=EN-US>/*#DATA1</span><span lang=EN-US
style='font-family:Wingdings;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";mso-char-type:symbol;mso-symbol-font-family:
Wingdings'><span style='mso-char-type:symbol;mso-symbol-font-family:Wingdings'>à</span></span><span
lang=EN-US>0832</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>2</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 style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>的输入寄存器</span><span lang=EN-US>*/</span></p>

<p class=MsoNormal><span lang=EN-US>INC DPTR</span></p>

<p class=MsoNormal><span lang=EN-US>MOV @DPTR,A</span></p>

<p class=MsoNormal><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"'>启动</span><span
lang=EN-US>D/A</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>转换</span><span lang=EN-US>*/</span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;mso-bidi-font-size:
12.0pt;color:red'>DAC1210</span><span style='font-size:14.0pt;mso-bidi-font-size:
12.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman";color:red'>：</span><a name=DAC1210></a><span lang=EN-US
style='font-size:14.0pt;mso-bidi-font-size:12.0pt;color:red'><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;mso-bidi-font-size:
12.0pt;color:red'><!--[if gte vml 1]><v:shape id="_x0000_i1042" type="#_x0000_t75"
 style='width:739.5pt;height:384pt'>
 <v:imagedata src="外部资源.files/image023.png" o:title="8051"/>
</v:shape><![endif]--><![if !vml]><img border=0 width=986 height=512
src="外部资源.files/image024.jpg" v:shapes="_x0000_i1042"><![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:14.0pt;mso-bidi-font-size:12.0pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman";color:red'>串行</span><span lang=EN-US style='font-size:14.0pt;
mso-bidi-font-size:12.0pt;color:red'>D/A</span><span style='font-size:14.0pt;
mso-bidi-font-size:12.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman";color:red'>转换器：</span><span lang=EN-US
style='font-size:14.0pt;mso-bidi-font-size:12.0pt;color:red'>TLV5616</span><a
name=TLV5616></a><span style='font-size:14.0pt;mso-bidi-font-size:12.0pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman";color:red'>：</span><span lang=EN-US style='font-size:14.0pt;
mso-bidi-font-size:12.0pt;color:red'><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;mso-bidi-font-size:
12.0pt;color:red'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><!--[if gte vml 1]><v:shape id="_x0000_s1029" type="#_x0000_t75"
 style='position:absolute;left:0;text-align:left;margin-left:0;margin-top:0;
 width:192.75pt;height:132pt;z-index:2;mso-position-horizontal:left;
 mso-position-vertical:top;mso-position-vertical-relative:line' o:allowoverlap="f">
 <v:imagedata src="外部资源.files/image025.png" o:title="8031"/>
 <w:wrap type="square"/>
</v:shape><![endif]--><![if !vml]><img width=257 height=176
src="外部资源.files/image026.jpg" align=left hspace=12 v:shapes="_x0000_s1029"><![endif]><span
lang=EN-US style='font-size:14.0pt;mso-bidi-font-size:12.0pt;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=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 align=center style='text-align:center'><span lang=EN-US>D15</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 align=center style='text-align:center'><span lang=EN-US>D14</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 align=center style='text-align:center'><span lang=EN-US>D13</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 align=center style='text-align:center'><span lang=EN-US>D12</span></p>
  </td>
  <td width=152 valign=top style='width:113.65pt;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 lang=EN-US>D11</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>D10~D0</span></p>
  </td>
 </tr>
 <tr style='mso-yfti-irow:1;mso-yfti-lastrow:yes'>
  <td width=57 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 align=center style='text-align:center'><span lang=EN-US>X</span></p>
  </td>
  <td width=57 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 align=center style='text-align:center'><span lang=EN-US>SPD</span></p>
  </td>
  <td width=57 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 align=center style='text-align:center'><span lang=EN-US>PWR</span></p>
  </td>
  <td width=57 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 align=center style='text-align:center'><span lang=EN-US>X</span></p>
  </td>
  <td width=152 style='width:113.65pt;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>New
  DAC Value(12bit)</span></p>
  </td>
 </tr>
</table>

<p class=MsoNormal><span lang=EN-US>SPD=1</span><span style='font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>快速，</span><span
lang=EN-US>SPD=0</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>慢速，</span><span lang=EN-US>PWR=1</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>低功耗，</span><span lang=EN-US>PWR=0</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>正常功耗</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"'>低功耗的方式下所有的放大器被关闭</span></p>

<p class=MsoNormal><span lang=EN-US><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;mso-bidi-font-size:
12.0pt;color:red'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span lang=EN-US style='font-size:14.0pt;mso-bidi-font-size:
12.0pt;color:red'><!--[if gte vml 1]><v:shape id="_x0000_i1043" type="#_x0000_t75"
12345

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