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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>8051 Stop Mode — External Interrupt Polling?</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/41705/8051-stop-mode-external-interrupt-polling</link><description> 
I inherited a physical product that needs to function like this
using an 8051 in STOP mode. My user manual is a little light on STOP
mode implementation for 8051s. 

 
I can&amp;#39;t get this to work, does someone who has used 8051s can
weigh in on this? </description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: 8051 Stop Mode — External Interrupt Polling?</title><link>https://community.arm.com/thread/70376?ContentTypeID=1</link><pubDate>Mon, 06 Nov 2017 01:35:13 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:84aee8d0-d33a-493f-b6be-b59b865386a3</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;p&gt;
Sadly, STOP mode is not part of the standard 8051 core - so
behaviour is going to be chip specific.&lt;br /&gt;
And nothing to do with Keil.&lt;/p&gt;

&lt;p&gt;
You might try &lt;b&gt;&lt;a href="http://www.8052.com"&gt;http://www.8052.com&lt;/a&gt;&lt;/b&gt; but that, like 8051
use in general, is &amp;quot;dwindling&amp;quot; (to be polite).&lt;/p&gt;

&lt;p&gt;
Presumably too much to hope that the &amp;quot;sketchball Asian&amp;quot;
manufacturer has any kind of support ... ?&lt;/p&gt;

&lt;p&gt;
If it&amp;#39;s a rip-off of a (more) well-known brand, perhaps they might
have better documentation/support?&lt;br /&gt;
Or perhaps you could &amp;quot;model&amp;quot; the behaviour on their part?&lt;br /&gt;
If it still exists ...&lt;/p&gt;

&lt;p&gt;
&lt;b&gt;&lt;br /&gt;
:(&lt;br /&gt;&lt;/b&gt;&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: 8051 Stop Mode — External Interrupt Polling?</title><link>https://community.arm.com/thread/70377?ContentTypeID=1</link><pubDate>Sun, 05 Nov 2017 15:57:05 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:a45960a6-c8a0-4113-89e4-aecebec194ce</guid><dc:creator>Tim Payne</dc:creator><description>&lt;p&gt;&lt;p&gt;
&lt;b&gt;UPDATE&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;
Even though the datasheet does not state it, it looks like the
watchdog timer and internal low power clock keep running in STOP
mode. There may be a way to jigger some variables to keep the system
in STOP even when it is being retriggered.&lt;/p&gt;

&lt;p&gt;
Am I on the right path?&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>