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	<id>https://citylan.it/index.php?action=history&amp;feed=atom&amp;title=AT89C4051</id>
	<title>AT89C4051 - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://citylan.it/index.php?action=history&amp;feed=atom&amp;title=AT89C4051"/>
	<link rel="alternate" type="text/html" href="https://citylan.it/index.php?title=AT89C4051&amp;action=history"/>
	<updated>2026-09-05T07:19:50Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.43.6</generator>
	<entry>
		<id>https://citylan.it/index.php?title=AT89C4051&amp;diff=31509&amp;oldid=prev</id>
		<title>WikiSysop: /* Files */</title>
		<link rel="alternate" type="text/html" href="https://citylan.it/index.php?title=AT89C4051&amp;diff=31509&amp;oldid=prev"/>
		<updated>2026-08-27T20:25:42Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Files&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:25, 27 August 2026&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l30&quot;&gt;Line 30:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 30:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:CPU]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:CPU]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:DIP20]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:DIP20&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;-300mil&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>WikiSysop</name></author>
	</entry>
	<entry>
		<id>https://citylan.it/index.php?title=AT89C4051&amp;diff=4680&amp;oldid=prev</id>
		<title>WikiSysop: Created page with &#039;&#039;&#039;&#039;8-bit Microcontroller&#039;&#039;&#039;  =Pinout= &lt;pre&gt; DIP20             +---\/---+     RST/Vpp | 1    20| Vcc   (RXD)P3.0 | 2    19| P1.7   (TXD)P3.1 | 3    18| P1.6       XTAL2 | 4    17|…&#039;</title>
		<link rel="alternate" type="text/html" href="https://citylan.it/index.php?title=AT89C4051&amp;diff=4680&amp;oldid=prev"/>
		<updated>2011-04-21T15:13:14Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;#039;&amp;#039;&amp;#039;&amp;#039;8-bit Microcontroller&amp;#039;&amp;#039;&amp;#039;  =Pinout= &amp;lt;pre&amp;gt; DIP20             +---\/---+     RST/Vpp | 1    20| Vcc   (RXD)P3.0 | 2    19| P1.7   (TXD)P3.1 | 3    18| P1.6       XTAL2 | 4    17|…&amp;#039;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;8-bit Microcontroller&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&lt;br /&gt;
=Pinout=&lt;br /&gt;
&amp;lt;pre&amp;gt;&lt;br /&gt;
DIP20&lt;br /&gt;
            +---\/---+&lt;br /&gt;
    RST/Vpp | 1    20| Vcc&lt;br /&gt;
  (RXD)P3.0 | 2    19| P1.7&lt;br /&gt;
  (TXD)P3.1 | 3    18| P1.6&lt;br /&gt;
      XTAL2 | 4    17| P1.5&lt;br /&gt;
      XTAL1 | 5    16| P1.4&lt;br /&gt;
(*INT0)P3.2 | 6    15| P1.3&lt;br /&gt;
(*INT1)P3.3 | 7    14| P1.2&lt;br /&gt;
   (TO)P3.4 | 8    13| P1.1(AIN0)&lt;br /&gt;
   (T1)P3.5 | 9    12| P1.0(AIN0)&lt;br /&gt;
        GND |10    11| P3.7&lt;br /&gt;
            +--------+&lt;br /&gt;
&amp;lt;/pre&amp;gt;&lt;br /&gt;
&lt;br /&gt;
=Frequency=&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;DIP20&amp;#039;&amp;#039;&amp;#039;&amp;lt;br&amp;gt;&lt;br /&gt;
Set reader to FREQ, put black probe to GND, red probe to 4,5 to measure CPU clock&lt;br /&gt;
&lt;br /&gt;
=External links=&lt;br /&gt;
&lt;br /&gt;
=Files=&lt;br /&gt;
&amp;lt;gallery widths=&amp;quot;150px&amp;quot;&amp;gt;&lt;br /&gt;
File:at89c4051.pdf|At89C4051 Datasheet&lt;br /&gt;
&amp;lt;/gallery&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:CPU]]&lt;br /&gt;
[[Category:DIP20]]&lt;/div&gt;</summary>
		<author><name>WikiSysop</name></author>
	</entry>
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