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???
04/21/05 12:41
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 		 #92033 - I just followed orders
Responding to: ???'s previous message
You speciy "external oscillator" do you have an "external oscillator"

In this sense, yes - the externally attached quartz - but I just see that it actually goes through a divide-by-12 line ...

The other available options according to the 'Users Guide' is a clock-divider fed by the quartz and another divider fed by the aforementioned divider (for a total of 1/16 of the quartz speed).

A wild guess based on personal experience with the language in other datasheets is that you have mistaken the meaning of "external oscillator"

That may of course be, and you're welcome to see for yourself, page 102 in the 'DS89C420 User's Guide', but I assume I got it partly right :)

/Thomas

List of 33 messages in thread
TopicAuthorDate
DS89C450 / uVision2, timer0 trouble            01/01/70 00:00      
   perhaps            01/01/70 00:00      
      nope - didn't work            01/01/70 00:00      
   never used Dallas but            01/01/70 00:00      
      I just followed orders            01/01/70 00:00      
         link, please            01/01/70 00:00      
            my apologies            01/01/70 00:00      
               try system clock            01/01/70 00:00      
                  The system clock vs. External Oscillator            01/01/70 00:00      
                     Try >=?            01/01/70 00:00      
                        good idea            01/01/70 00:00      
                           probably a watchdog or such            01/01/70 00:00      
                              about the beer ...            01/01/70 00:00      
                                 reason            01/01/70 00:00      
                                    puzzled by the simplicity            01/01/70 00:00      
                                       It's getting late in Denmark            01/01/70 00:00      
                                          the Thomas Skyt late night show ...            01/01/70 00:00      
                                             kiss            01/01/70 00:00      
                                                KISS/2            01/01/70 00:00      
   A variety of thoughts            01/01/70 00:00      
      A variety of answers            01/01/70 00:00      
         Thoughts for variety of answers            01/01/70 00:00      
            sfr's            01/01/70 00:00      
            the watchdog            01/01/70 00:00      
               The watchdog, timed access, and errata            01/01/70 00:00      
                  setting the OCR to disable the watchdog            01/01/70 00:00      
                     Timed access, take 2            01/01/70 00:00      
                        unnecessary excersize            01/01/70 00:00      
                           The watchdog, take 3            01/01/70 00:00      
                              when in doubt            01/01/70 00:00      
                                 Examining the assembly            01/01/70 00:00      
                                    get out of there            01/01/70 00:00      
                                       I got out, found a solution            01/01/70 00:00      

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