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???
01/06/10 13:57
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 		 #172191 - complicated and complicated
Responding to: ???'s previous message
External RAM of 89S51 is complicated!

If, indeed, you mean 'complicated' as in a load on your brain, you better find something else to do.

However if you mean 'complicated', as in extra chips, more wiring, lost port pins etc, there is hope.

You already have the link to the "Keil device database" where you will find e.g. the NXP p89c66x and the SILabs f12x/f13x with 8k of "internal external RAM". These chips will make no difference whatsoever in your software, only hardware is affected (simplified)

Erik

List of 26 messages in thread
TopicAuthorDate
Need more Internal RAM            01/01/70 00:00      
   Yes, but they handle it the same as external RAM            01/01/70 00:00      
   Look here            01/01/70 00:00      
      Ok            01/01/70 00:00      
   complicated and complicated            01/01/70 00:00      
   why?            01/01/70 00:00      
   It's Not Really So Complicated--And....            01/01/70 00:00      
      someone recently posted a link to a 805x with 64kB of RAM            01/01/70 00:00      
      Proper methodology can't really bound the memory requirement            01/01/70 00:00      
      That's My Point            01/01/70 00:00      
   RAM expansion need not be complicated!            01/01/70 00:00      
      MOVX problem            01/01/70 00:00      
         No            01/01/70 00:00      
            unless you have external glue logic            01/01/70 00:00      
               Yes            01/01/70 00:00      
         "bible" time!            01/01/70 00:00      
      There are much larger SPI memories            01/01/70 00:00      
   Look at Wiz chip            01/01/70 00:00      
      Link?            01/01/70 00:00      
         links            01/01/70 00:00      
            Overkill?            01/01/70 00:00      
               and expensive?            01/01/70 00:00      
                  When at electronics store            01/01/70 00:00      
                     Which one?            01/01/70 00:00      
                     How does that compare with ordering from outside?            01/01/70 00:00      
                        I've always had to do that!            01/01/70 00:00      

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