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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>protecting a sector of flash</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/16884/protecting-a-sector-of-flash</link><description> Hi! 
 
Is it possible to protect a sector by software to protect important information and unprotect it again in software to read or update this information? 
 
I&amp;#39;m using an AMD Flash AM29F200! 
 
Thanks for your answers! 
 
Robert </description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: protecting a sector of flash</title><link>https://community.arm.com/thread/86569?ContentTypeID=1</link><pubDate>Fri, 14 Nov 2003 11:45:18 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:412de373-ceda-4dcd-bedd-4fb16b092bcb</guid><dc:creator>Drew Davis</dc:creator><description>&lt;p&gt;A glance at the data sheet seems to indicate to me that this particular part does not support sector protection and unprotection purely via software.  A flash programmer (with high voltages on Vid and manipulation of the control pins) is required to protect the part.  Even the &amp;quot;temporary unprotection&amp;quot; requires some hardware intervention (Vid on the RESET pin).&lt;br /&gt;
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(&amp;quot;Spansion&amp;quot;?  What were they thinking?  I&amp;#39;d much rather buy from AMD or Fujitsu than &amp;quot;Spansion&amp;quot;.  And now I&amp;#39;ve lost a second source for my parts, since I can only list the one company instead of two separate ones.)&lt;br /&gt;
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I know Atmel has some parts that support a sector lock via software command -- but the one I happen to be familiar with will only unlock after a chip reset, and not via a command.  That may be a little inconvenient for your application.  I don&amp;#39;t know of any parts that lock and unlock freely via software off the top of my head, but they&amp;#39;re probably out there.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: protecting a sector of flash</title><link>https://community.arm.com/thread/50204?ContentTypeID=1</link><pubDate>Fri, 14 Nov 2003 09:12:25 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:b19e037d-00cf-4d42-be1e-c5654e8892c3</guid><dc:creator>HansBernhard Broeker</dc:creator><description>&lt;p&gt;Whether or not it does --- it&amp;#39;s completely irrelevant in this forum.  Please direct your off-topic inquiries elsewhere.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>