<?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>AT89S52 Write lock sequence</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/33106/at89s52-write-lock-sequence</link><description> 
I&amp;#39;m designing an ISP programmer for AT89S52. I have completed
Erase,Write &amp;amp; verify successfully but I&amp;#39;m stuck with programming
the lock bits. I want to achieve write lock mode 2. 

 
I&amp;#39;m sending the sequence: 0xAC 0xE0 0x00 0x00 0xAC 0xE1 0x00 0x00</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator></channel></rss>