Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
05/29/06 13:37
Modified:
  05/29/06 13:38
Read: times


 		 #117226 - program ROM?
Responding to: ???'s previous message
I won't answer your question, but if you want to be able to change program on-the-fly, chose a type with sufficient internal FLASH and in-situ programmability - virtually any contemporary clone of '51 except the simplest.

I'd also suggest to use UART-ISP-able clones, rather than SPI-ISP-able (AT89Sxxxx from Atmel represent the latter). My favorites are the RD2 subfamily (e.g. AT89C51ED2 from Atmel and P89V51RD2 from Philips).

Avoiding external program memory your SBC will also shrink to absolute minimum - the mcu itself, some sources, a reset circuit and the crystal or oscillator. You will be able to stitch it together within a couple of minutes on any protoboard, no dedicated PCB necessary.

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      

Back to Subject List