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???
12/21/06 14:59
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 		 #129902 - Population v sample sigma
Responding to: ???'s previous message
Hi Lynn,

Am I wrong, or don't you work at a chipmaker there in Austin? Maybe Motorola, or maybe a smaller (perhaps boutique) chipmaker? In any case, you are making dangerous extrapolations based on a sample size of one. If you are truly going to reverse engineer this chip, then characterize a much larger sample than just one chip. At least then you'll have some meaningful statistics behind your conclusions.

Just a thought, and good luck,

Joe

List of 29 messages in thread
TopicAuthorDate
The 8255A is stronger and faster than reported.            01/01/70 00:00      
   The Data Sheet rules            01/01/70 00:00      
      How can we rely on that specification?            01/01/70 00:00      
   Not proven!            01/01/70 00:00      
   who give s hoot what you have 'found'            01/01/70 00:00      
      Data sheets don' rule in reverse engineering            01/01/70 00:00      
         Does that mean...            01/01/70 00:00      
            I'm a chip provider, not a user            01/01/70 00:00      
               then do notstate "The 8255A is stronger and fast"            01/01/70 00:00      
                  8255 statements            01/01/70 00:00      
         They do determine what you have to deliver ...            01/01/70 00:00      
            What I Did            01/01/70 00:00      
               Hmmmm ...            01/01/70 00:00      
                  Measuring output DC parameters            01/01/70 00:00      
                     What did you really test?            01/01/70 00:00      
                        DC measurements            01/01/70 00:00      
                           That's why measurements are quick and automatic            01/01/70 00:00      
                              My paycheck?            01/01/70 00:00      
   No!            01/01/70 00:00      
   How?            01/01/70 00:00      
      Measuring Specs            01/01/70 00:00      
   Population v sample sigma            01/01/70 00:00      
      Should know better            01/01/70 00:00      
         Dangerous extrapolations            01/01/70 00:00      
      The other side of the looking glass            01/01/70 00:00      
   The timing issue was the delay ....            01/01/70 00:00      
      Thanks for the tip            01/01/70 00:00      
      8255            01/01/70 00:00      
         do these two things            01/01/70 00:00      

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