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???
07/20/07 06:50
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#142065 - Missed the point!
Responding to: ???'s previous message
Erik Malund said:
if you use a separate clock for an A/D you will get 'clock biting'

Purushottam Dayama said:
There has been no clock 'biting' in my scheme as AD operation was "synchronous" as it was derived from uC's clock crystal.

So, of course you won't get clock "biting", as Erik calls it!

Erik said that clock "biting" can occur when you you do not use the uC's clock crystal - eg, if you do as you suggested here: http://www.8052.com/forum/read.phtml?id=142045

I have constructed one instrument with this and it is very working sarisfactorily

Just one instrument isn't a significant sample!
Issues like this can easily affect one example, and not the next.

This is the big difference between just building a one-off that "works", and designing a Product where you know that every single one will definitely work as you continue to manufacture them day after day...




List of 41 messages in thread
TopicAuthorDate
ICL7135 count read with its CLOCK pin?            01/01/70 00:00      
   What do you plane to learn from the clock?            01/01/70 00:00      
      asm code            01/01/70 00:00      
         You didn't answer the fundamental question            01/01/70 00:00      
         You have missed the point ...            01/01/70 00:00      
            No, Richard you have missed the point            01/01/70 00:00      
               It seems you\'re right!            01/01/70 00:00      
                  RE: to Richard Erlacher            01/01/70 00:00      
                     Come on ... don\'t you want to do any work at all?            01/01/70 00:00      
                        Truly, a budding manager...            01/01/70 00:00      
   See the clock and integrator waveform            01/01/70 00:00      
      What are you good at?            01/01/70 00:00      
         It is not            01/01/70 00:00      
            Elementary simple Erik            01/01/70 00:00      
               Missed the point!            01/01/70 00:00      
            Clock biting? Hhm...            01/01/70 00:00      
               OH            01/01/70 00:00      
                  Wait a minute...            01/01/70 00:00      
                     no, it was ~12MHz (uC) and 20kHz            01/01/70 00:00      
                  One swallow doesnt make a summer            01/01/70 00:00      
                     well if you are happy with one bit less of precisi            01/01/70 00:00      
                        One's view depends on how you at it!            01/01/70 00:00      
                           that does not improve precision            01/01/70 00:00      
                              Please refresh your knowledge of Legal accuracy            01/01/70 00:00      
                                 this is nonsense            01/01/70 00:00      
               What's "Clock Biting?"            01/01/70 00:00      
                  clock biting            01/01/70 00:00      
                     Duty Cycle "biting" doesnt have effect on this            01/01/70 00:00      
                        can't you READ?            01/01/70 00:00      
                     I see ... so it's like "frame slip" in comm's            01/01/70 00:00      
         my test asm code to count ADC value of ICL7135            01/01/70 00:00      
            Code wont work properly            01/01/70 00:00      
   thnks for suggestion            01/01/70 00:00      
      6 Digits?            01/01/70 00:00      
         RE: 6 digit reason..            01/01/70 00:00      
            CHEAT            01/01/70 00:00      
               Use extra digits for something useful            01/01/70 00:00      
                  How 6 digit matter?            01/01/70 00:00      
                     my code to display on 6 digit display            01/01/70 00:00      
            Just ignore the spare one!            01/01/70 00:00      
            left-justify the display            01/01/70 00:00      

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