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???
05/27/10 14:36
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#176234 - Already discussed
Responding to: ???'s previous message
Paul Louchot said:
And if yes, why cannot it use the internal one ?

Because the accuracy is not usually good enough - see: http://www.8052.com/forum/read/176041

However, although the initial accuracy may be poor, I seem to recall that NXP (probably when they were still Philips?) had an application note on how to calibrate the internal oscillator of an LPC9xx - because the stability is actually quite good...

List of 14 messages in thread
TopicAuthorDate
UART and crystal oscillator            01/01/70 00:00      
   be clear            01/01/70 00:00      
   Already discussed            01/01/70 00:00      
      Definitely depends on processor            01/01/70 00:00      
         we do not even know ...            01/01/70 00:00      
            Internal crystal oscillator            01/01/70 00:00      
            UART with internal oscillator            01/01/70 00:00      
               Philips had one ... SCC2691            01/01/70 00:00      
                  Maxim?            01/01/70 00:00      
      NXP (Philips) AN            01/01/70 00:00      
   C8051F005            01/01/70 00:00      
      re: C8051F005            01/01/70 00:00      
         SILabs generated language confusion            01/01/70 00:00      
            re: confusing            01/01/70 00:00      

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