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<?xml-stylesheet type="text/xsl" href="https://community.arm.com/utility/feedstylesheets/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>not able to connect p89v51rd2 with serial port</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/38018/not-able-to-connect-p89v51rd2-with-serial-port</link><description> 
I have bought a p89v51rd2 ic with small development board, for ISP
programming, but when i&amp;#39;m connecting through the serial port its
showing it is &amp;quot;not able to connect with given baud rate(9600), try
with lower baud rate, and try to reset ISP.&amp;quot; I tryed</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: not able to connect p89v51rd2 with serial port</title><link>https://community.arm.com/thread/52590?ContentTypeID=1</link><pubDate>Thu, 09 Oct 2008 22:06:01 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:abf5223f-15ec-4398-b60a-ca97c889fb74</guid><dc:creator>sri reddy</dc:creator><description>&lt;p&gt;&lt;p&gt;
sorry, this time i&amp;#39;ll expl&amp;#39;n u better,&lt;br /&gt;
I have bought a p89v51rd2 ic with small development board,which was
Readily available as &amp;acirc;&amp;euro;&amp;oelig;p89v512rd2n development
board&amp;acirc;&amp;euro; @ there is no any manual for it, it is a local
make it is a product of NSK electronics. To contact them there is no
any contact details . to see how the board looks you can see at
&lt;a href="http://www.nskelectronics.com"&gt;http://www.nskelectronics.com&lt;/a&gt;
there u can find as 89V51RD2 MINI DEVELOPMENT BOARD Price: 200/- .
and next is I waas able to program it for 3 times , but all the 3
times after around some 25 times trial was taken to connect it, once
it gets connected we can read , program it, erase, but once if I
press reset switch again the same trial should be made to connect it.
The baud rate it matched was 2400, i am not able to clear the
problem.&lt;br /&gt;
the cable i am using is diret rs232 with 3 wires the TX &amp;amp; RX are
connected properly, as i was able to program it for 3 times and again
read it.&lt;br /&gt;
but eveery time it gives a problem to connect and now it is not
connecting.&lt;br /&gt;
please help me in what ever way u can.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: not able to connect p89v51rd2 with serial port</title><link>https://community.arm.com/thread/114310?ContentTypeID=1</link><pubDate>Wed, 08 Oct 2008 14:04:57 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:78832abd-5681-481c-8149-67694b675141</guid><dc:creator>HansBernhard Broeker</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;And yu would think that because they are USB/Serial converters
they would be &amp;#39;standard&amp;#39;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
Oh, they mostly are. The problem is that ISP is not really a
standard job for RS232 links.&lt;/p&gt;

&lt;p&gt;
USB simply cannot be used to fully emulate the behaviour of a PC
serial port at any but the very lowest of baud rates. Some details of
the timing &lt;b&gt;will&lt;/b&gt; be lost. It&amp;#39;s a matter of luck whether that
unavoidable fact breaks a given application or not.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: not able to connect p89v51rd2 with serial port</title><link>https://community.arm.com/thread/101159?ContentTypeID=1</link><pubDate>Wed, 08 Oct 2008 13:37:15 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:c0a042c9-c3df-4c12-b856-486ddd4fab89</guid><dc:creator>AJ Boston</dc:creator><description>&lt;p&gt;&lt;p&gt;
And yu would think that because they are USB/Serial converters
they would be &amp;#39;standard&amp;#39;&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: not able to connect p89v51rd2 with serial port</title><link>https://community.arm.com/thread/89308?ContentTypeID=1</link><pubDate>Wed, 08 Oct 2008 13:30:35 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:951ce78e-01de-4827-b674-cf7866ffd8ba</guid><dc:creator>erik  malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
There are a whole lot of USB/serial converteres that DO NOT WORK
for ISP, at the Flashmagic forum there is a thread about which does
and which don&amp;#39;t&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: not able to connect p89v51rd2 with serial port</title><link>https://community.arm.com/thread/52587?ContentTypeID=1</link><pubDate>Wed, 08 Oct 2008 12:55:58 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:3d54370f-ee5d-4b7f-811f-a11e524dc18d</guid><dc:creator>AJ Boston</dc:creator><description>&lt;p&gt;&lt;p&gt;
How are you connecting to the serial interface? Are you sure that
the port you have chosen for communication is the port you are
connecting the cable to on the host side? If you are using a
USB-serial cable make sure that it shows in your &amp;#39;Hardware Device
Manager&amp;#39; in Windows.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: not able to connect p89v51rd2 with serial port</title><link>https://community.arm.com/thread/52588?ContentTypeID=1</link><pubDate>Tue, 07 Oct 2008 00:54:21 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:9c432f30-1b2e-4a7f-8173-347c07782ffe</guid><dc:creator>edPer Westermark</dc:creator><description>&lt;p&gt;&lt;p&gt;
1) You do not supply what board you have bought.&lt;/p&gt;

&lt;p&gt;
2) What does the manual say that you have to do, to program the
board?&lt;/p&gt;

&lt;p&gt;
3) You do not supply any information how you have made sure that
you are able to send data to the processor, or that the procesor is
electrically capable to send data back or how you know that the
processor really gets reset.&lt;/p&gt;

&lt;p&gt;
4) Exactly how do you expect people to send a schematics to you?
By doing ASCII graphics?&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>