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12/04/12 01:13
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  12/04/12 01:14
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 		 #188956 - There aren't many "usual" 8051-cores anymore...
Responding to: ???'s previous message
The original 8051-core had neither an in-system-programmable flash memory nor these tricky POR and BOR circuitries today's clones have. But all these flash code memory corruption issues have to do with the implemented flash memory plus the ISP feature (with internal generation of programming high voltage) plus the POR and BOR circuitry which shall prevent the micro from running ill at power up and power down. If you want information about proper power up slope rates then you must not look at the original 8081 core but at the today's available 8051-clones from Silabs, TI, MAXIM (Dallas), AD, Atmel, Philips, etc.

Kai Klaas

List of 33 messages in thread
TopicAuthorDate
C8051F231 experiences            01/01/70 00:00      
   another solution            01/01/70 00:00      
   The probabilities are low...            01/01/70 00:00      
      think about what happens when you add a finger            01/01/70 00:00      
         The point is ...            01/01/70 00:00      
            Yes ... the underlying issue is the flash ...             01/01/70 00:00      
               Out of my office, but...            01/01/70 00:00      
                  Don't think in Vcc, ESD or hum...            01/01/70 00:00      
   Apparently several C8051F2xx parts have the same pinout            01/01/70 00:00      
   Characteristic for in system programmable flash micros...            01/01/70 00:00      
      All too true ... sadly ...             01/01/70 00:00      
         Power-on slope rate...            01/01/70 00:00      
            Sorry, my post should be here, no up there...            01/01/70 00:00      
            Have you any basis for that rate?            01/01/70 00:00      
               Vdd ramp time            01/01/70 00:00      
               Some datasheets show numbers...            01/01/70 00:00      
                  Those aren't the "usual" 805x-core MCU's            01/01/70 00:00      
                     There aren't many "usual" 8051-cores anymore...            01/01/70 00:00      
                        How dangerous power ups can be...            01/01/70 00:00      
                           I believe it            01/01/70 00:00      
                              (dV/dt) examples            01/01/70 00:00      
                                 They don't know it either...            01/01/70 00:00      
                                    dV/dT etc             01/01/70 00:00      
                                       reset request...            01/01/70 00:00      
                                          That's what disturbs me greatly            01/01/70 00:00      
                                             It IS disturbing!            01/01/70 00:00      
                                                Where this began ... at least for me ...             01/01/70 00:00      
                                                   So, you took the hard road...            01/01/70 00:00      
                                                      We've all had that experience             01/01/70 00:00      
   probable cause            01/01/70 00:00      
      Brent, this is very nice            01/01/70 00:00      
         forum no longer down            01/01/70 00:00      
      Thank you!            01/01/70 00:00      

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