📄 rs-232-rs-485无源转换电路设计 无忧电子开发网-技术文章.htm
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!-- saved from url=(0053)http://www.51kaifa.com/html/jswz/200601/read-4565.htm -->
<HTML><HEAD><TITLE>RS-232/RS-485无源转换电路设计 无忧电子开发网-技术文章</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<META content=无忧电子开发网 name=Author>
<META content="" name=Keywords>
<META content="" name=description>
<META http-equiv=pragma content=no-cache>
<META http-equiv=Cache-Control content="no-cache, must-revalidate">
<META http-equiv=expires content="Wed, 26 Feb 1997 08:21:57 GMT"><LINK
href="RS-232-RS-485无源转换电路设计 无忧电子开发网-技术文章.files/css.css" type=text/css
rel=stylesheet>
<META content="MSHTML 6.00.2900.3268" name=GENERATOR></HEAD>
<BODY background="" topMargin=10 marginheight="10" marginwidth="10">
<TABLE cellSpacing=0 cellPadding=0 width=760 align=center border=1>
<TBODY>
<TR>
<TD width="100%">
<TABLE height=2 cellSpacing=0 cellPadding=0 width="100%" bgColor=#808080
border=0>
<TBODY>
<TR>
<TD width="100%"></TD></TR></TBODY></TABLE>
<TABLE height=80 cellSpacing=0 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD align=middle width=186><A href="http://www.51kaifa.com/"><IMG
height=65 src="RS-232-RS-485无源转换电路设计 无忧电子开发网-技术文章.files/logo.jpg"
width=186 border=0></A></TD>
<TD align=middle width=574>
<TABLE cellSpacing=0 cellPadding=0 width=574 border=0>
<TBODY>
<TR>
<TD vAlign=bottom width=120><A
href="http://www.51kaifa.com/jswz"><IMG height=65
src="RS-232-RS-485无源转换电路设计 无忧电子开发网-技术文章.files/logo_jswz2.gif"
width=120 border=0></A></TD>
<TD vAlign=top width=454>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD width="100%" height=19>
<TABLE cellSpacing=0 cellPadding=0 width="100%"
border=0>
<TBODY>
<TR>
<TD class=xyzx_top align=middle width="100%"
height=19><A
href="http://www.51kaifa.com/hyxw">综合资讯</A> <A
href="http://www.51kaifa.com/zxyd">在线阅读</A> <A
href="http://www.51kaifa.com/yyfa">原文阅读</A> <A
href="http://www.51kaifa.com/shop">在线商城</A> <A
href="http://www.51kaifa.com/zxxz">下载专区</A> <A
href="http://www.51kaifa.com/datasheet">DATASHEET</A>
<A href="http://www.51kaifa.com/bbs">技术论坛</A> <A
href="http://www.51kaifa.com/MenberInfo">商务频道</A></TD></TR></TBODY></TABLE></TD></TR>
<TR>
<TD width="100%"
background="RS-232-RS-485无源转换电路设计 无忧电子开发网-技术文章.files/R_top_bj.gif"
height=54><!-- -->
<TABLE cellSpacing=0 cellPadding=0 width="100%"
border=0>
<TBODY>
<TR>
<TD width=*>
<P style="LINE-HEIGHT: 150%"><A class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list2/list-2.htm">嵌入式系统</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list3/list-3.htm">单片机</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list4/list-4.htm">D
S P</A> <A class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list14/list-14.htm">EDA/PLD</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list9/list-9.htm">接口电路</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list12/list-12.htm">存储技术</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list15/list-15.htm">显示光电</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list6/list-6.htm">电源技术</A><BR><A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list11/list-11.htm">传感/控制</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list10/list-10.htm">模拟技术</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list7/list-7.htm">通信网络</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list8/list-8.htm">无线通信</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list16/list-16.htm">电测仪表</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list13/list-13.htm">消费电子</A> <A
class=xyzx_top2
href="http://www.51kaifa.com/html/jswz/list25/list-25.htm">汽车电子</A><BR></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
<TABLE height=4 cellSpacing=0 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD width="100%"></TD></TR></TBODY></TABLE>
<SCRIPT language=JavaScript>function fontzoom(size){ document.getElementById('fontzoom').style.fontSize=size+'px'}function Form_check(){ var Tcomment="jswz_comment"; var Tcon="jswz"; var Url="jswz"; if (document.myform.anonymous.checked!=1) { if (document.ifname.user.value==""){ alert("您没有选择匿名项，所以帐号必须填写！"); document.ifname.user.focus(); return false; } var nUser = document.ifname.user.value; if (document.ifname.password.value==""){ alert("您没有选择匿名项，所以帐号跟密码必须填写！"); document.ifname.password.focus(); return false; } var nPassword = document.ifname.password.value; if (document.myform.content.value==""){ alert("评论内容不能为空！"); document.myform.content.focus(); return false; } document.myform.action="/read_deal.php?user="+nUser+"&password="+nPassword+"&Tcomment="+Tcomment+"&Tcon="+Tcon+"&Url="+Url; document.myform.submit(); }else{ var anonymous = document.myform.anonymous.value; if (document.myform.content.value==""){ alert("评论内容不能为空！"); document.myform.content.focus(); return false; } document.myform.action="/read_deal.php?anonymous="+anonymous+"&Tcomment="+Tcomment+"&Tcon="+Tcon+"&Url="+Url; document.myform.submit(); }}</SCRIPT>
<TABLE cellSpacing=0 cellPadding=0 width=760 align=center border=0>
<TBODY>
<TR>
<TD width="100%">
<TABLE cellSpacing=0 cellPadding=0 width="98%" align=center
border=0>
<TBODY>
<TR>
<TD align=middle width="5%" height=25><IMG
src="RS-232-RS-485无源转换电路设计 无忧电子开发网-技术文章.files/R_url.jpg"></TD>
<TD width="95%">所在的位置：<A
href="http://www.51kaifa.com/">首页</A></A> → <A
href="http://www.51kaifa.com/jswz">技术文章</A></A> → <A
href="http://www.51kaifa.com/html/jswz/list7/list-7.htm">通信网络</A>
→ <FONT color=#ff9900>正文</FONT> </TD></TR></TBODY></TABLE>
<TABLE cellSpacing=0 cellPadding=0 width=760 align=center
border=0><TBODY>
<TR>
<TD width="100%" bgColor=#808080 colSpan=3 height=1></TD></TR>
<TR>
<TD vAlign=top width="100%">
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD align=left width="100%"><IFRAME border=0
marginWidth=0 marginHeight=0
src="RS-232-RS-485无源转换电路设计 无忧电子开发网-技术文章.files/ad-jswz_8.htm"
frameBorder=no width=480 scrolling=no
height=60></IFRAME><!-- <script type="text/javascript" src="/ad/ad.php?ListName=jswz&Place=8&Way=h&Num=5"></script> --></TD></TR></TBODY></TABLE>
<TABLE cellSpacing=0 cellPadding=0 width="94%" align=center
border=0>
<TBODY>
<TR>
<TD align=middle width="100%"><FONT
color=#05006c><B>RS-232/RS-485无源转换电路设计</B></FONT></TD></TR>
<TR>
<TD width="100%" height=6></TD></TR>
<TR>
<TD align=middle width="100%" height=18>
<TABLE style="BORDER-TOP: #666666 1px solid" height=22
cellSpacing=1 cellPadding=0 width="100%" border=0>
<TBODY>
<TR>
<TD align=middle width="100%"
bgColor=#dce9fc>发布日期:2006-01-10 <!-- 浏览数:<font color=#A20010><SCRIPT language=Javascript src="/read_view.php?ID=4565&nTable=jswz"></SCRIPT></font> -->作者:李继晟
来源:单片机与嵌入式系统应用 </TD></TR></TBODY></TABLE></TD></TR>
<TR>
<TD width="100%" height=6></TD></TR>
<TR>
<TD class=p16 id=fontzoom style="LINE-HEIGHT: 1.5"
vAlign=top width="100%" height=400><BR><!--内容中广告开始-->
<TABLE cellSpacing=0 cellPadding=0 align=left
border=0><TBODY>
<TR>
<TD>
<SCRIPT
src="RS-232-RS-485无源转换电路设计 无忧电子开发网-技术文章.files/ad-jswz_6.js"></SCRIPT>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -