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style='font-size:9.0pt;line-height:150%;font-family:宋体;mso-bidi-font-family:
宋体'>数字温度计使用</span></strong><span lang=EN-US style='font-size:9.0pt;
line-height:150%'><o:p></o:p></span></p>
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lang=EN-US style='font-size:9.0pt;line-height:150%'> </span><span
style='font-size:9.0pt;line-height:150%;color:red'>热</span><span
lang=EN-US style='font-size:9.0pt;line-height:150%'> <o:p></o:p></span></p>
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<p class=MsoNormal align=right style='text-align:right;line-height:150%;
word-break:break-all'><span style='font-size:9.0pt;line-height:150%'>【字体：<span
lang=EN-US><a href="javascript:fontZoomA();"><span lang=EN-US
style='color:white'><span lang=EN-US>小</span></span></a> <a
href="javascript:fontZoomB();"><span lang=EN-US style='color:white'><span
lang=EN-US>大</span></span></a></span>】<span lang=EN-US><o:p></o:p></span></span></p>
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<p class=MsoNormal align=center style='text-align:center;line-height:150%;
word-break:break-all'><span lang=EN-US style='font-size:9.0pt;line-height:
150%'>DS18B20</span><span style='font-size:9.0pt;line-height:150%'>数字温度计使用<span
lang=EN-US><o:p></o:p></span></span></p>
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word-break:break-all'><b><span lang=EN-US style='font-size:9.0pt;line-height:
150%'><o:p> </o:p></span></b></p>
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<p class=MsoNormal align=center style='text-align:center;line-height:150%;
word-break:break-all'><span style='font-size:9.0pt;line-height:150%'>作者：未知<span
lang=EN-US> </span>文章来源：网络<span lang=EN-US> </span>点击数：<span
lang=EN-US>1575 </span>更新时间：<span lang=EN-US>2005-9-2<o:p></o:p></span></span></p>
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<p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;margin-left:1.0cm;text-align:center;text-indent:-1.0cm;tab-stops:list 0cm left 54.0pt;
word-break:break-all'><b style='mso-bidi-font-weight:normal'><i
style='mso-bidi-font-style:normal'><span lang=EN-US style='font-size:15.0pt;
font-family:"Arial Black";mso-fareast-font-family:华文新魏'>35</span></i></b><b
style='mso-bidi-font-weight:normal'><i style='mso-bidi-font-style:normal'><span
style='font-size:15.0pt;font-family:华文新魏;mso-ascii-font-family:"Arial Black";
mso-hansi-font-family:"Arial Black"'>．</span></i></b><b style='mso-bidi-font-weight:
normal'><i style='mso-bidi-font-style:normal'><span lang=EN-US
style='font-size:7.0pt;font-family:"Times New Roman";mso-fareast-font-family:
华文新魏'> </span></i></b><b
style='mso-bidi-font-weight:normal'><i style='mso-bidi-font-style:normal'><span
lang=EN-US style='font-size:15.0pt'>DS18B20</span></i></b><b
style='mso-bidi-font-weight:normal'><i style='mso-bidi-font-style:normal'><span
style='font-size:15.0pt;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>数字温度计使用</span></i></b><b style='mso-bidi-font-weight:normal'><i
style='mso-bidi-font-style:normal'><span style='font-size:15.0pt'><u1:P> </span></i></b><span
lang=EN-US></u1:P></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
tab-stops:54.0pt;word-break:break-all'><b style='mso-bidi-font-weight:normal'><i
style='mso-bidi-font-style:normal'><span lang=EN-US style='font-family:幼圆'>1</span></i></b><b
style='mso-bidi-font-weight:normal'><i style='mso-bidi-font-style:normal'><span
style='font-family:幼圆'>．<span lang=EN-US>DS18B20</span>基本知识<u1:P> </u1:P></span></i></b></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'> </span><span
lang=EN-US>DS18B20</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>数字温度计是</span><span lang=EN-US>DALLAS</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>公司生产的</span><span
lang=EN-US>1</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>－</span><span lang=EN-US>Wire</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，即单总线器件，具有线路简单，体积小的特点。因此用它来组成一个测温系统，具有线路简单，在一根通信线，可以挂很多这样的数字温度计，十分方便。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span lang=EN-US>1</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>、</span><span
lang=EN-US>DS18B20</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>产品的特点</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'> （</span><span
lang=EN-US>1</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）、只要求一个端口即可实现通信。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'> （</span><span
lang=EN-US>2</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）、在</span><span lang=EN-US>DS18B20</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>中的每个器件上都有独一无二的序列号。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'> （</span><span
lang=EN-US>3</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）、实际应用中不需要外部任何元器件即可实现测温。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'> （</span><span
lang=EN-US>4</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）、测量温度范围在－</span><span lang=EN-US>55</span><sup><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>。</span></sup><span
lang=EN-US>C</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>到＋</span><span lang=EN-US>125</span><sup><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>。</span></sup><span
lang=EN-US>C</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>之间。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'> （</span><span
lang=EN-US>5</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）、数字温度计的分辨率用户可以从</span><span
lang=EN-US>9</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>位到</span><span lang=EN-US>12</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>位选择。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'> （</span><span
lang=EN-US>6</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>）、内部有温度上、下限告警设置。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
text-indent:21.0pt;word-break:break-all'><b style='mso-bidi-font-weight:normal'><i
style='mso-bidi-font-style:normal'><span lang=EN-US style='font-family:幼圆'>2</span></i></b><b
style='mso-bidi-font-weight:normal'><i style='mso-bidi-font-style:normal'><span
style='font-family:幼圆'>、<span lang=EN-US>DS18B20</span>的引脚介绍<u1:P> </u1:P></span></i></b><span
lang=EN-US><o:p></o:p></span></p>
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style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'> </span><span
lang=EN-US>TO</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>－</span><span lang=EN-US>92</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>封装的</span><span
lang=EN-US>DS18B20</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>的引脚排列见图</span><span lang=EN-US>1</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，其引脚功能描述见表</span><span
lang=EN-US>1</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>。</span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
word-break:break-all'><span lang=EN-US> <u1:P> </u1:P> <u1:P> </u1:P></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
word-break:break-all'><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>表</span><span lang=EN-US>1</span><span
style='mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'> </span><span
lang=EN-US>DS18B20</span><span style='mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>详细引脚功能描述</span></p>
<table class=MsoNormalTable border=1 cellspacing=0 cellpadding=0
style='border-collapse:collapse;border:none;mso-border-alt:solid windowtext .5pt;
mso-padding-alt:0cm 5.4pt 0cm 5.4pt'>
<tr style='mso-yfti-irow:0;mso-yfti-firstrow:yes'>
<td width=43 valign=top style='width:32.4pt;border:solid windowtext 1.0pt;
mso-border-alt:solid windowtext .5pt;padding:0cm 5.4pt 0cm 5.4pt'>
<p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:center;line-height:150%'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>序号</span></p>
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<td width=48 valign=top style='width:36.0pt;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='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:center;line-height:150%'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>名称</span></p>
</td>
<td width=477 valign=top style='width:357.7pt;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='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;text-align:center;line-height:150%'><span style='mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>引脚功能描述</span></p>
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</tr>
<tr style='mso-yfti-irow:1'>
<td width=43 valign=top style='width:32.4pt;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-margin-top-alt:auto;mso-margin-bottom-alt:
auto;line-height:150%'><span lang=EN-US>1</span></p>
</td>
<td width=48 valign=top style='width:36.0pt;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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;line-height:150%'><span lang=EN-US>GND</span></p>
</td>
<td width=477 valign=top style='width:357.7pt;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-margin-top-alt:auto;mso-margin-bottom-alt:
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