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Erik Malund
01/06/10 07:57
Read: 201 times
Mt Airy, Nc
USA


 		 #172191 - complicated and complicated
Responding to: Trangga Findanugroho'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      Trangga Findanugroho      01/05/10 21:14      
   Yes, but they handle it the same as external RAM        Richard Erlacher      01/05/10 22:38      
   Look here      Andy Neil      01/06/10 01:59      
      Ok      Trangga Findanugroho      01/07/10 02:05      
   complicated and complicated      Erik Malund      01/06/10 07:57      
   why?      Stefan KAnev      01/06/10 12:39      
   It's Not Really So Complicated--And....      Marty McLeod      01/06/10 16:25      
      someone recently posted a link to a 805x with 64kB of RAM      Richard Erlacher      01/06/10 16:34      
      Proper methodology can't really bound the memory requirement      Per Westermark      01/06/10 17:56      
      That's My Point      Marty McLeod      01/13/10 20:21      
   RAM expansion need not be complicated!      Valentin Angelovski      01/06/10 18:37      
      MOVX problem      Trangga Findanugroho      01/06/10 22:20      
         No      Per Westermark      01/06/10 22:29      
            unless you have external glue logic      Andy Neil      01/07/10 01:46      
               Yes      Per Westermark      01/07/10 03:06      
         "bible" time!      Andy Neil      01/07/10 01:53      
      There are much larger SPI memories      Richard Erlacher      01/07/10 01:39      
   Look at Wiz chip      JecksonS Ben      01/07/10 05:14      
      Link?      Andy Neil      01/07/10 05:44      
         links      Stefan KAnev      01/07/10 06:17      
            Overkill?      Andy Neil      01/07/10 07:28      
               and expensive?      Andy Neil      01/08/10 02:44      
                  When at electronics store      JecksonS Ben      01/12/10 06:19      
                     Which one?      Andy Neil      01/12/10 07:06      
                     How does that compare with ordering from outside?      Richard Erlacher      01/12/10 08:13      
                        I've always had to do that!      Andy Neil      01/12/10 09:20      

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