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???
05/13/10 13:44
Read: 1112 times


 
#175861 - programing on chip flash?
hi im new to microcontrollers and i was wondering about how parallel programming of on chip flash memory works. I read the datasheets and documentation from philps on their 8051s but still confused. I understand many can be programmed using ISP with the boot loader, and some have ICP capability, to program themselves, but what I was wondering is how do the parallel programmers access the internal flash memory without a boot loader for serial communication. Is it through one of the ports connected to the internal bus, like clock in address, clock in data while certain pins high or low? Would the 8051 be powered on while programming? Basically I want to understand the process of writing code to internal memory. i realise every chip would have different voltages and timing algorithms, but how would you find this information, datasheet, maybe i didn't understand it? i realise isp is simpler but want to understand the nuts and bolts behind how they wrote the boot sector in the first place.

List of 19 messages in thread
TopicAuthorDate
programing on chip flash?      Douglas Brummund      05/13/10 13:44      
   of course, you are,      Erik Malund      05/13/10 14:33      
   parallel programming      Jan Waclawek      05/13/10 15:36      
   thanks everyone      Douglas Brummund      05/13/10 19:18      
      Not exactly fair      Andy Neil      05/14/10 00:48      
      too deep      Stefan KAnev      05/14/10 01:48      
         Internal voltage doublers in some chips for IAP support      Per Westermark      05/14/10 03:14      
            hm      Stefan KAnev      05/14/10 03:58      
               actually ...      Erik Malund      05/14/10 04:32      
               why to do this? I cant understand :-(      Andy Neil      05/14/10 04:37      
                  the Manzi book      Erik Malund      05/14/10 05:17      
                     You mean, "Mazidi"      Andy Neil      05/14/10 06:17      
                        agreed, and ...      Erik Malund      05/14/10 06:26      
            ISP before IAP?      Andy Neil      05/14/10 04:41      
               A question of driving force      Per Westermark      05/14/10 04:54      
      baloney      Erik Malund      05/14/10 04:35      
   programming on chip flash?      Douglas Brummund      05/17/10 20:28      
      If only it were that simple...      Andy Neil      05/18/10 00:13      
      did you read my remark above...      Jan Waclawek      05/18/10 00:47      

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