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Stefan Kanev
05/14/10 01:48
Read: 654 times

#175874 - too deep
Responding to: ???'s previous message
Hi, Douglas,
You are looking too deep - into electrons level.
Usually people here need to know how to programm chip, electron level details are work for physicians. Some parts do not need higher(than normal run mode) voltage , some need. I remember one story with Atmel - they produced in same time 12V/6V parts simultaneously with 5V part (i mean prgramming mode).
5V part was stoped - i think due to problems with data retention, or suddenly self-destroying. Here i want to point - high voltages can be used only as hardware protection , and here can be nothing related to electrons and gates.
All this depends of manufacturer technology. If You really want to enter into parallel programming mode - write letter to manufacturer and wait answer.

For example - some years ago Winbond(Nuvoton) discontinued one part(with published algorithm) . I needed to migrate to new part - without published algorithm. I asked them 2-3 times , and they sended document (after last letter, where i explained that will migrate to other vendor, instead to buy universall programmer to program one chip only).

List of 19 messages in thread
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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