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???
03/03/05 22:24
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 		 #89046 - XA vs 251
Responding to: ???'s previous message
But if you want to use a "16 bit '51'" the XA is sooo much better than the 251. For one it has a "C based instruction set".

This may be true. However, if you have a significant amount of legacy 8051 code (or even 8051 libraries) you can link it AS IS WITH NO CHANGES into a 251 program. This is what's so attractive about the 251.

If you are switching architectures, then I would probably only look at 16 or 23-bit architectures with multiple vendors.

Jon

List of 93 messages in thread
TopicAuthorDate
Kitchen sink (wanted features)            01/01/70 00:00      
   The obvious answer            01/01/70 00:00      
      Increased ALU capacity?            01/01/70 00:00      
         atleast 16 bit ALU            01/01/70 00:00      
            addendum to obvious answer            01/01/70 00:00      
            quite useless            01/01/70 00:00      
               Dallas            01/01/70 00:00      
            16 bit ALU etc            01/01/70 00:00      
               Kitchen sinks around...            01/01/70 00:00      
                  nope            01/01/70 00:00      
                     Whichever...            01/01/70 00:00      
                     If Philips did it so can others            01/01/70 00:00      
               ARM            01/01/70 00:00      
      FPGA - panacea?            01/01/70 00:00      
         No panacea            01/01/70 00:00      
      All data locations are bit-addressable.            01/01/70 00:00      
   what I want            01/01/70 00:00      
      Already done!            01/01/70 00:00      
         next step...            01/01/70 00:00      
   I would say ...            01/01/70 00:00      
      Flash RAM?            01/01/70 00:00      
         NV RAM            01/01/70 00:00      
            back up power            01/01/70 00:00      
         some non volatile RAM            01/01/70 00:00      
         some non volatile RAM            01/01/70 00:00      
   reset            01/01/70 00:00      
      Did'nt you get anything for Christmas?            01/01/70 00:00      
      The LPC has these            01/01/70 00:00      
   I forgot to say...            01/01/70 00:00      
      Sorry I just did that            01/01/70 00:00      
   Want true 16-bit PWM Support            01/01/70 00:00      
   Additional memory support            01/01/70 00:00      
   Why didnt you say Michael??            01/01/70 00:00      
      Some usefull things.            01/01/70 00:00      
   Interrupts            01/01/70 00:00      
   what I have made external            01/01/70 00:00      
   expression            01/01/70 00:00      
   USB master,            01/01/70 00:00      
      because?            01/01/70 00:00      
         because...            01/01/70 00:00      
         the other because            01/01/70 00:00      
            Stack?            01/01/70 00:00      
               separate memory space for stack            01/01/70 00:00      
                  stack et al.            01/01/70 00:00      
                     stack and rest features            01/01/70 00:00      
                        stack and the manufacturers            01/01/70 00:00      
                           Morpheus            01/01/70 00:00      
                           makers and Ultra51 from Winedge            01/01/70 00:00      
                              There's the catch!            01/01/70 00:00      
                                 DEC DPTR            01/01/70 00:00      
                        Maybe not so useless            01/01/70 00:00      
                        not quite...            01/01/70 00:00      
                     My opinion            01/01/70 00:00      
                        16-bit SP and Ri            01/01/70 00:00      
                           if that's the goal            01/01/70 00:00      
                              Hardware and software relationship            01/01/70 00:00      
                                 re Hardware and software relationship            01/01/70 00:00      
                                    Compiler efficiency            01/01/70 00:00      
                              Much simpler            01/01/70 00:00      
                                 not6 KISS but KICI            01/01/70 00:00      
                                    16-bit Ri II            01/01/70 00:00      
                                       16 bits and pieces            01/01/70 00:00      
                                          16 bit Ri ad nauseam            01/01/70 00:00      
                                    16bit pointers: a different view            01/01/70 00:00      
                                       compiler compatibility            01/01/70 00:00      
                                          Yes, the compiler - here comes gcc            01/01/70 00:00      
                                             Oh boy            01/01/70 00:00      
                                                depends on people and perhaps motivation            01/01/70 00:00      
                                                   you are making my point            01/01/70 00:00      
                                                   Also            01/01/70 00:00      
                                                      no more gcc            01/01/70 00:00      
                                                         Open source '52 Pascal Compiler            01/01/70 00:00      
                                                compiler design            01/01/70 00:00      
                                                   absolutely            01/01/70 00:00      
                           New features            01/01/70 00:00      
                        what happens...            01/01/70 00:00      
                           bank selectors            01/01/70 00:00      
                              Hanging a bag on the 8051 will fail...            01/01/70 00:00      
                                 Bravo, but            01/01/70 00:00      
                                    XA vs 251            01/01/70 00:00      
                                       23-bit            01/01/70 00:00      
                                          42 bit...            01/01/70 00:00      
                                       never happens            01/01/70 00:00      
                                          No mods for my code...            01/01/70 00:00      
                                             XA compatibility            01/01/70 00:00      
      re: USB master            01/01/70 00:00      
   Features I want:            01/01/70 00:00      
      High Speed ADC and SRAM            01/01/70 00:00      
   I conclude            01/01/70 00:00      
   actually 23 bit does exist            01/01/70 00:00      
   Dreams come to product            01/01/70 00:00      
      Dreams come -they came            01/01/70 00:00      
         wide Vcc range            01/01/70 00:00      

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