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???
01/09/07 15:23
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 		 #130510 - AT89C4051 hardware
Responding to: ???'s previous message
Ralph,

The diagram you show has the LCD connected as a memory mapped device. The AT98C4051 does not support external memory access, so you can't hook up the display as shown in the schematic. You can still connect it to your 4051, but the 25 page program won't work without modification. Have you looked at the LCD tutorial here? http://www.8052.com/tutlcd.phtml and maybe the memory addressing tutorial. http://www.8052.com/tutaddr.phtml

Jon

List of 44 messages in thread
TopicAuthorDate
How to create wr rd for E strobe on LCD            01/01/70 00:00      
   No research!            01/01/70 00:00      
      Wrong plenty of research            01/01/70 00:00      
         clock speed?            01/01/70 00:00      
            Erik it is 12 clocker            01/01/70 00:00      
               the question is moot ...            01/01/70 00:00      
         Wrong!            01/01/70 00:00      
            My error            01/01/70 00:00      
               Asm code            01/01/70 00:00      
                  missing boldface            01/01/70 00:00      
                  4051 has no port 0            01/01/70 00:00      
                     Tell me something I don't know!            01/01/70 00:00      
   when posting a schematic PLEASE do not do it in a            01/01/70 00:00      
      This why Erik            01/01/70 00:00      
         upset?            01/01/70 00:00      
            Your 1 True Love            01/01/70 00:00      
               I don't what happen but see below            01/01/70 00:00      
   AT89C4051 hardware            01/01/70 00:00      
      A better schematic post            01/01/70 00:00      
         Understanding the schematic will help.            01/01/70 00:00      
            Thanks for the your reply            01/01/70 00:00      
               Which ports you use doesn't matter ...            01/01/70 00:00      
   LCD interface            01/01/70 00:00      
      Thanks for the comment            01/01/70 00:00      
         Cant post code?            01/01/70 00:00      
      Yikes, that interface is old-skool !            01/01/70 00:00      
         yikes, your attitude sucks            01/01/70 00:00      
         You don't like my idea            01/01/70 00:00      
            It is here!            01/01/70 00:00      
               don't quite understand            01/01/70 00:00      
                  I can            01/01/70 00:00      
                     commodore 64            01/01/70 00:00      
   STOP - THINK - START OVER            01/01/70 00:00      
      Thanks for your comments            01/01/70 00:00      
         You must know what is required            01/01/70 00:00      
            an addition            01/01/70 00:00      
               shortcut            01/01/70 00:00      
                  in response to Andy, there is now one worse            01/01/70 00:00      
                     That's why these queries continue to appear HERE!            01/01/70 00:00      
                     Mapquest            01/01/70 00:00      
   Nice Thread. Lots of passion.            01/01/70 00:00      
      This was a popular PIC demo about 15 years ago            01/01/70 00:00      
         We're dating ourselves a bit arent we?            01/01/70 00:00      
            Well ... Yes ... maybe ... those were the days ...            01/01/70 00:00      

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