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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>EPP timing (ARM LPC2138)</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/37431/epp-timing-arm-lpc2138</link><description> 
Dear All The computer output 8 bits data of P1.24~P1.31, and I
save the data on the buffer(EPP_Data); then the data was input to LCD
driver IC via the P0.0~P0.7. 

 
Problem: 
My computer output 0x11 via P1.24~P1.31 and use scope to check
computer output</description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: EPP timing (ARM LPC2138)</title><link>https://community.arm.com/thread/48560?ContentTypeID=1</link><pubDate>Thu, 13 Sep 2007 09:30:33 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:e74d1433-445f-45a2-8cba-0f2de2234860</guid><dc:creator>Keil Software Support Intl.</dc:creator><description>&lt;p&gt;&lt;p&gt;
on P0.0 - P0.7 there are some I2C pins which do not have an
on-chip pull up. You need pull-up resistors on those pins. Did you
add them?&lt;/p&gt;
&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>