<?xml version="1.0" encoding="UTF-8" ?>
<?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>LEVEL CONVERTER.........</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/23161/level-converter</link><description> 
i am using a level converter for one of my application.. 
of course its not MAX 232 and it has provision for conversion to
RS422/485 also..... 
i have tried to communicate through serial port.... 
RS232 to TTL conversion is taking place and im able</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: LEVEL CONVERTER.........</title><link>https://community.arm.com/thread/49599?ContentTypeID=1</link><pubDate>Thu, 27 Mar 2008 01:09:08 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:4443e6ab-3d49-4c3a-b7c6-1c09876c9521</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;&amp;quot;can any body give me links for interbal (sic) architecture of
level converters? (take for example MAX 232)&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
I presume you mean &amp;quot;internal&amp;quot;?&lt;/p&gt;

&lt;p&gt;
Did it not occur to you to look in the MAX232 &lt;b&gt;Datasheet&lt;/b&gt; for
this information?&lt;/p&gt;

&lt;p&gt;
The section titled &lt;i&gt;&amp;quot;Detailed Description&amp;quot;&lt;/i&gt; provides, well, a
detailed description of how the chip works - including the dual
charge-pump voltage converters!&lt;/p&gt;

&lt;p&gt;
I suggest you spend some time at the Maxim website studying all
the useful information there:&lt;/p&gt;

&lt;p&gt;
&lt;a href="http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1798/t/do"&gt;www.maxim-ic.com/.../do&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
&lt;a href="http://www.maxim-ic.com/products/interface/rs232_resources.cfm"&gt;www.maxim-ic.com/.../rs232_resources.cfm&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
Again, this has nothing to do with Keil or the 8051.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: LEVEL CONVERTER.........</title><link>https://community.arm.com/thread/100418?ContentTypeID=1</link><pubDate>Thu, 27 Mar 2008 01:01:54 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:6ceeec41-d927-4754-918d-3af0e92fff82</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
Note that this has nothing to do with the 8051 or with Keil!&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;i havn&amp;#39;t got any explanation about the level converter not
generating negative voltage&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
There are two possibilities:&lt;/p&gt;

&lt;p&gt;
&lt;b&gt;(1).&lt;/b&gt; You have wired it incorrectly;&lt;/p&gt;

&lt;p&gt;
&lt;b&gt;(2).&lt;/b&gt; It is faulty.&lt;/p&gt;

&lt;p&gt;
Or both.&lt;/p&gt;

&lt;p&gt;
Of course, &lt;b&gt;(1)&lt;/b&gt; may cause &lt;b&gt;(2)&lt;/b&gt;.&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: LEVEL CONVERTER.........</title><link>https://community.arm.com/thread/76115?ContentTypeID=1</link><pubDate>Wed, 26 Mar 2008 20:46:25 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:b2092d22-5e34-478a-b8f1-856c97435441</guid><dc:creator>dharanidhar chatrathy</dc:creator><description>&lt;p&gt;&lt;p&gt;
i havn&amp;#39;t got any explanation about the level converter not
generating negative voltage&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: LEVEL CONVERTER.........</title><link>https://community.arm.com/thread/51638?ContentTypeID=1</link><pubDate>Wed, 26 Mar 2008 13:48:27 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:d97bac39-5ea6-41e4-a6f1-e43349944e08</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;&amp;quot;of course its not MAX 232&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
Why &amp;quot;of course&amp;quot;?!&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;&amp;quot;...take for xample MAX 232&amp;quot;&lt;/i&gt;&lt;/p&gt;

&lt;p&gt;
Having gone to the trouble of explicitly stating that you&amp;#39;re not
using a MAX232, why so you now want it as your example?!&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: LEVEL CONVERTER.........</title><link>https://community.arm.com/thread/51635?ContentTypeID=1</link><pubDate>Wed, 26 Mar 2008 11:27:35 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:1f1038ce-4e3c-429b-9261-e5c013941e24</guid><dc:creator>erik  malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;i&gt;i am using a level converter for one of my application.. of
course its not MAX 232&lt;/i&gt;&lt;br /&gt;
do not say what it is not, say what it is&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;The problem is i couldn&amp;#39;t get RS232 from TTL......&lt;br /&gt;
the level from controller is 3.3V but the RS232 level is +5V.&lt;/i&gt;&lt;br /&gt;
what Vcc/Vdd does the &amp;quot;level converter&amp;quot; get&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;does the capacitors play any role.....?&lt;/i&gt;&lt;br /&gt;
yes, do you think they are there just to make the capacitor usage go
up?&lt;/p&gt;

&lt;p&gt;
&lt;i&gt;can any body give me links for interbal architecture of level
converters?(take for xample MAX 232)&lt;/i&gt;&lt;br /&gt;
two charge pumps, receiver circuitry and driver circuitry.&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>