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???
05/31/06 20:19
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 		 #117425 - V vs C
Responding to: ???'s previous message
I don't know the '668, but Philips moved from P89C51RD2 to P89V51RD2 and I tried to find out, why. My conclusion, without having inside information, just from what I gathered by experiments is, that the V is either a OEM chip, or a result of cooperation, with SST. The 'V's core is different from the 'C's - see the "push SP" thread (AFAIR even Bill Houghton confirmed this difference). The 'V' has signature bytes indicating it is SST part rather than Philips. The boot flash and even SoftICE is the same as with SST - actually, I use SST's documents about SoftICE, as Philips did not bother to publish them.

Jan Waclawek

List of 38 messages in thread
TopicAuthorDate
8051 optimal PCB setup            01/01/70 00:00      
   program ROM?            01/01/70 00:00      
      I object to the language            01/01/70 00:00      
   Simplest            01/01/70 00:00      
   simplest SBC schematic:            01/01/70 00:00      
   Try AT89S52            01/01/70 00:00      
   in addition            01/01/70 00:00      
      whyy not go all the way            01/01/70 00:00      
         P89C668?            01/01/70 00:00      
             but the 66x has (from memory)            01/01/70 00:00      
               So what's V mean?            01/01/70 00:00      
                  why 'V' I do not know, but they have a V            01/01/70 00:00      
                     Soft Ice            01/01/70 00:00      
                     V, + and -            01/01/70 00:00      
                        in those rare cases            01/01/70 00:00      
                  V vs C            01/01/70 00:00      
         Hasn't anybody produced a part with ...            01/01/70 00:00      
            yes            01/01/70 00:00      
               Sadly, it's not a "part"            01/01/70 00:00      
                  a faulty sort            01/01/70 00:00      
                     still no "normal" part            01/01/70 00:00      
                        it also wouldn't take much to build one            01/01/70 00:00      
                           it's a rare case            01/01/70 00:00      
                              True, fer shurr ...            01/01/70 00:00      
                                 all my designs is one of 2            01/01/70 00:00      
                                    I was just discussing that ...            01/01/70 00:00      
                                       ROM RAM swap            01/01/70 00:00      
                                          are you trolling for a food-fight again?            01/01/70 00:00      
                                             No, i DO not know, That does not mean I            01/01/70 00:00      
                                                Just a minute ...            01/01/70 00:00      
                                                   any 51's?            01/01/70 00:00      
                                                      No ... I was referring to UBICOM            01/01/70 00:00      
                                                         easy            01/01/70 00:00      
                                                            you'd think they'd do it, then            01/01/70 00:00      
                                                               they do            01/01/70 00:00      
            the fattest '51            01/01/70 00:00      
               the fattest '51            01/01/70 00:00      
                  dunno            01/01/70 00:00      

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