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???
11/02/06 13:53
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 		 #127259 - I have seen NO catches by a checksum
Responding to: ???'s previous message
I have worked and am working with 'inherited' products. Some have checksum verification. I have seen NO catches by a checksum routine in my life (except verification immediately after programming). I have seen chips that 'lost their mind' but none that had enough left to tell.

Erik

PS just got a thought. Is it possible that using one of these "wonderful" kitchen table programmers and getting a half charge to the flash capacitors that a checksum routine may be valid there? When charging all marginally, losing just one bit as the first sign of failure may be a possible event. However, when discussing I refer to correctly designed, correctly 'burned' products. Kitchen table programming may be the reason that some still think power up checksum check is valid.

List of 26 messages in thread
TopicAuthorDate
Global Checksum            01/01/70 00:00      
   Checksum of what?            01/01/70 00:00      
      Rom Contents            01/01/70 00:00      
         why checksum???            01/01/70 00:00      
            The OP intended to use CRC-32...            01/01/70 00:00      
            ... but it's a good point otherwise...            01/01/70 00:00      
               timestamp vs crc            01/01/70 00:00      
                  timestamp, serial number, neutral 16 bit checksum            01/01/70 00:00      
                  who said 'automatic' and yes I have            01/01/70 00:00      
                     You didn't, Jan did            01/01/70 00:00      
   A bit of a logical fallasy            01/01/70 00:00      
      not at all... depends on application...            01/01/70 00:00      
      Statistics            01/01/70 00:00      
         ferrite beads            01/01/70 00:00      
            \"legitimate\" uses of checksum            01/01/70 00:00      
               I have seen NO catches by a checksum            01/01/70 00:00      
                  it's not just the matter of "kitchenware"...            01/01/70 00:00      
                     One thing that should not be handled by checksummi            01/01/70 00:00      
                        blah blah            01/01/70 00:00      
                        That's not how I remember it ...            01/01/70 00:00      
                           that was me            01/01/70 00:00      
                  I\'ve got a box that contains a few ...            01/01/70 00:00      
            links to CRC            01/01/70 00:00      
               I still say that crc's and checksums only work            01/01/70 00:00      
                  Most            01/01/70 00:00      
      I'd like to learn more            01/01/70 00:00      

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