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???
05/31/06 20:24
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 		 #117427 - V, + and -
Responding to: ???'s previous message
Erik Malund said:
why 'V' I do not know, but they have a Very nice ISP system which is that if you feed them a 'U' within (is it) 300 mS of power up, they go into ISP.

At the same time, it is nasty, if something trnasmits into your gadget when it undergoes RESET: it can go into the bootloader mode falsely.
Fortunately, the bootloader is in FLASH, so it can be modified...

Also, they have something called SoftIce which, to the best of my knowledge, nobody has figured out yet

As I said elsewhere, you can use SST's documentation to work with it. It is a version of Keil's FlashMon (hence works with Keil only), which is a core-type monitor. This modification smartly uses the (surplus) Flash instead of the precious RAM.

Jan Waclawek

PS: Oh yes, V might be for Voltage: the low voltage version of the RD2 is called "LV"...

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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