<?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>Generation of 18k square wave</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/20500/generation-of-18k-square-wave</link><description> 
How to generate the 18kHz sqaure wave using 8051 
 </description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: Generation of 18k square wave</title><link>https://community.arm.com/thread/112336?ContentTypeID=1</link><pubDate>Mon, 02 Oct 2006 08:45:05 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:3a0a9ffa-1518-43dc-a7b9-de21836ac351</guid><dc:creator>erik  malund</dc:creator><description>&lt;p&gt;&lt;p&gt;
even easier:&lt;br /&gt;
use the PCA&lt;br /&gt;
of course, if you insist on using some antique or &amp;#39;simple&amp;#39; chip, that
does not apply&lt;/p&gt;

&lt;p&gt;
Erik&lt;/p&gt;

&lt;p&gt;
reference:&lt;br /&gt;
The PCA cookbook&lt;br /&gt;
&lt;a href="http://www.intel.com/design/mcs51/applnots/270609.htm"&gt;www.intel.com/.../270609.htm&lt;/a&gt;&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Generation of 18k square wave</title><link>https://community.arm.com/thread/98466?ContentTypeID=1</link><pubDate>Fri, 29 Sep 2006 09:00:23 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:ce22d3e5-20c4-4a22-b847-b560411556ff</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
Actually, 28u&lt;b&gt;s&lt;/b&gt; !! ;-)&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Generation of 18k square wave</title><link>https://community.arm.com/thread/87938?ContentTypeID=1</link><pubDate>Fri, 29 Sep 2006 04:02:08 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:b4eb5149-95c3-4171-8a5a-36d678c51800</guid><dc:creator>clever dick</dc:creator><description>&lt;p&gt;&lt;p&gt;
28&lt;b&gt;u&lt;/b&gt;S :-)&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Generation of 18k square wave</title><link>https://community.arm.com/thread/87940?ContentTypeID=1</link><pubDate>Fri, 29 Sep 2006 02:51:10 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:a066db00-2dea-4636-ad3c-3113c5ca7901</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
Now, here are the links to the so-called &amp;quot;bible&amp;quot; for the 8051 -
see what you can find that might enable you to toggle a port pin once
every 28ms:&lt;/p&gt;

&lt;p&gt;
Chapter 1 - 80C51 Family Architecture:&lt;br /&gt;
&lt;a href="http://www.nxp.com/acrobat_download/various/80C51_FAM_ARCH_1.pdf"&gt;www.nxp.com/.../80C51_FAM_ARCH_1.pdf&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
Chapter 2 - 80C51 Family Programmer&amp;#39;s Guide and Instruction
Set:&lt;br /&gt;

&lt;a href="http://www.nxp.com/acrobat_download/various/80C51_FAM_PROG_GUIDE_1.pdf"&gt;www.nxp.com/.../80C51_FAM_PROG_GUIDE_1.pdf&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
Chapter 3 - 80C51 Family Hardware Description:&lt;br /&gt;

&lt;a href="http://www.nxp.com/acrobat_download/various/80C51_FAM_HARDWARE_1.pdf"&gt;www.nxp.com/.../80C51_FAM_HARDWARE_1.pdf&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;
Also check the &lt;b&gt;datasheet&lt;/b&gt; for the particular chip that
you&amp;#39;re using - it may have other useful features...&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Generation of 18k square wave</title><link>https://community.arm.com/thread/46921?ContentTypeID=1</link><pubDate>Fri, 29 Sep 2006 02:46:21 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:04331add-199f-4100-b341-4b9ec2cf1342</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
Easy: just toggle a port pin once every 28ms!&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>