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???
01/31/06 21:02
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 		 #108837 - oscillates ?
Responding to: ???'s previous message
Trevor Jacobs >The burden capacitors belong to the crystal and not to the processor. What happens when you use a sensible burden cap, like a 22pF ? It swamps the oscillator voltage down too low - about 200mVpp. [/quote said:


Still oscillates though ?

Like Kai said, and you and I agree with, the pins of the CPU present 5pF of load anyway. This is stupid. Maybe it reduces the processor power consumption by forcing you to use a TCXO !

Steve



List of 27 messages in thread
TopicAuthorDate
AT89S8253 Clock Oscillator Problem            01/01/70 00:00      
   Crazy value            01/01/70 00:00      
      RE:Crazy value - AT89S8252 Osc Loading            01/01/70 00:00      
         oscillates ?            01/01/70 00:00      
            Oscillator Comparison            01/01/70 00:00      
               PRE tags            01/01/70 00:00      
                  Table explained            01/01/70 00:00      
                  External Oscillator            01/01/70 00:00      
   if "around 7" is 8, then I would say you            01/01/70 00:00      
      I'd say so, but...            01/01/70 00:00      
         3rd overtone crystals are "real fun"            01/01/70 00:00      
      3rd overtone            01/01/70 00:00      
         please elaborate            01/01/70 00:00      
            not a string            01/01/70 00:00      
            Tuning the marimba...            01/01/70 00:00      
               waaay beyond the subject rel to above            01/01/70 00:00      
                  Evelyn Glennie            01/01/70 00:00      
                     thanks, Steve            01/01/70 00:00      
         Excerpts from a Maxim appnote            01/01/70 00:00      
      24 MHz Fundamental Mode            01/01/70 00:00      
         If history repeats itself, you are going            01/01/70 00:00      
            Come on...            01/01/70 00:00      
         Read between the lines...            01/01/70 00:00      
            Thanks Kai - AT89S8253, LP4052            01/01/70 00:00      
               to Trevor            01/01/70 00:00      
         G8DVN            01/01/70 00:00      
            OT:Get that HF Ticket!            01/01/70 00:00      

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