Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
09/30/06 04:16
Read: times


 		 #125409 - some other options
Responding to: ???'s previous message
The AT89C52 is attached to a LED display (the one that scrolls), the 2k of text will be scrolled on that LED display. The point being that after every 30minutes, the modem provides the controller with another 2k of text to be scrolled.

I also need the solution to be non-volatile, i.e incase of power outage the 2k message should not be lost. Is there any way I could write data on the 8K program memory? or should I go for an external EPROM? the AT89S4D12 also sounds attractive, it has a built in EPROM.

List of 28 messages in thread
TopicAuthorDate
large amounts of serial data            01/01/70 00:00      
   Need More Information            01/01/70 00:00      
   Use derivative with more ram            01/01/70 00:00      
   some other options            01/01/70 00:00      
      careful now ... what you want ISN'T EPROM            01/01/70 00:00      
      Message validity            01/01/70 00:00      
      A Possible Simplification? Maybe?            01/01/70 00:00      
         Ramifications            01/01/70 00:00      
            Whoops! Corrections!            01/01/70 00:00      
            Ramifications Acknowledged            01/01/70 00:00      
      trouble            01/01/70 00:00      
         scrolling and serial memory            01/01/70 00:00      
            the problem with scrolling            01/01/70 00:00      
   EEPROM writing            01/01/70 00:00      
      SRAM with a battery            01/01/70 00:00      
      Some Options            01/01/70 00:00      
         RAMTRON; FRAM; MRAM            01/01/70 00:00      
      2x 2k            01/01/70 00:00      
         Power fail recovery            01/01/70 00:00      
            options I will use now            01/01/70 00:00      
               But don't forget ...            01/01/70 00:00      
               Power Loss detector            01/01/70 00:00      
         absollutely            01/01/70 00:00      
   one last question            01/01/70 00:00      
      Flash is Not RAM            01/01/70 00:00      
      FLASH <> RAM            01/01/70 00:00      
         My predecessor did just that            01/01/70 00:00      
      options, options....            01/01/70 00:00      

Back to Subject List