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???
04/24/07 15:02
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 		 #137881 - sadly atmel 8051 derivatives dont
Responding to: ???'s previous message
Atmel seems to have missed out on making the clocking of their 8051 derivatives as flexable as the AVR range of processors.
I was thinking if the two frequencies are a related by a power of two then you could have one cyrstal oscillator driving a frequency divider, which is just a counter in effect.

List of 31 messages in thread
TopicAuthorDate
two crystals            01/01/70 00:00      
   Crystal connections            01/01/70 00:00      
      wires very very short            01/01/70 00:00      
         Youd be better off with a pair of DIY oscillators            01/01/70 00:00      
            why not use a derivative with a PLL?            01/01/70 00:00      
               What's a PPL?            01/01/70 00:00      
                  Phase Locked Loop            01/01/70 00:00      
                     It's not a very general sort of PLL            01/01/70 00:00      
                        apples and oranges            01/01/70 00:00      
                           Consider why one would want that ...            01/01/70 00:00      
                        PLL lock timing            01/01/70 00:00      
                           support droids didn't notice that ...            01/01/70 00:00      
                              .. err make that "jibe" : -)            01/01/70 00:00      
                     Atmel MCU with PLL?            01/01/70 00:00      
                        sometimes two wants do not jive            01/01/70 00:00      
                        sadly atmel 8051 derivatives dont            01/01/70 00:00      
            Am I right Richard?            01/01/70 00:00      
               What I meant ...            01/01/70 00:00      
   Koosha, we need an answer            01/01/70 00:00      
      What is in my mind...            01/01/70 00:00      
         why a switch ? It will give you all kins of proble            01/01/70 00:00      
         Maybe use a jumper instead of a switch?            01/01/70 00:00      
            better, yes, as good as none no.            01/01/70 00:00      
            it's commonly used.            01/01/70 00:00      
               all the story!            01/01/70 00:00      
                  Capacitor size            01/01/70 00:00      
                  whare is the uC?            01/01/70 00:00      
                     The uC is in the ZIF socket            01/01/70 00:00      
                  not this type of switch, please            01/01/70 00:00      
                  consider ALL the components!            01/01/70 00:00      
   Thank you!            01/01/70 00:00      

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