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Oliver Sedlacek
10/10/14 03:51
Read: 816 times

#190360 - more info
Responding to: Oliver Sedlacek's previous message
We can't find the source (written 20+ years ago in a different country, original engineers retired or made redundant), so 'same binary' is really the key thing.

As we need to spin the board, PLCC/QFP is a realistic option which we would go for as NXP are still showing support.

I'm not sure whether it's an FA or FB as the BOM still calls for an Intel part. I do know that it's got 4kB of PROM, and I would expect it to be a 12 clocker.

I would bet the code is riddled with timing loops, so faster operation is a complete no-no. i guess the world of fuse settings beckons.

List of 11 messages in thread
Any suggestions for P87C51F replacement?      Oliver Sedlacek      10/08/14 07:12      
   how critical is ...      Erik Malund      10/08/14 10:47      
   What MHz, Vcc, & exact part code ?      Jim Granville      10/08/14 22:33      
   more info      Oliver Sedlacek      10/10/14 03:51      
      Still no Vcc ?      Jim Granville      10/10/14 16:41      
      what about using an adapter?      Richard Erlacher      10/11/14 12:24      
      5V VCC      Oliver Sedlacek      10/13/14 01:55      
         the rumors of the demise of the '51 are greatly exaggerated      Erik Malund      10/13/14 07:21      
            New 8051's        Jim Granville      10/16/14 15:15      
               RE: New 8051's      Andy Neil      10/22/14 14:30      
                  rejoice      Erik Malund      10/23/14 10:04      

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