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???
06/14/05 15:14
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#94897 - Nope, never use an external when
Responding to: ???'s previous message
By the way, why not combining both watchdogs, the internal and the external one? Ever done this?
Nope, never use an external when a good internal is there, never use the internal if it is suspect (e.g. Intel kluge).
Besides, who would want to risk a dogfight, who knows what will happen with two dogs in the same cage :)

Re the reliance on a WD, you are absolutely right. I would consider it correct to install a marker that turned on when the WD bites and label that marker "replace board" or - unfortunately - more often "hire a designer that knows what (s)he is doing".

Erik



List of 25 messages in thread
TopicAuthorDate
AT89C51RD2 without supervisor IC            01/01/70 00:00      
   RC is never good            01/01/70 00:00      
      watchdog ad absurdum            01/01/70 00:00      
         and uses a bunch of pins            01/01/70 00:00      
            wd            01/01/70 00:00      
               paranoia revisited - wd 2            01/01/70 00:00      
                  when the full story            01/01/70 00:00      
                     WD3            01/01/70 00:00      
                        if code run astray            01/01/70 00:00      
   Has been discussed before            01/01/70 00:00      
   External ones are better            01/01/70 00:00      
      External ones are better in one respect            01/01/70 00:00      
         Yes, but...            01/01/70 00:00      
            Nope, never use an external when            01/01/70 00:00      
               Exactly!            01/01/70 00:00      
            Combined Watchdogs            01/01/70 00:00      
      External better in another respect            01/01/70 00:00      
   I'm using the internal and works well            01/01/70 00:00      
      works well - how do you know            01/01/70 00:00      
         who should test it?            01/01/70 00:00      
   nobody            01/01/70 00:00      
      the manufacturer should            01/01/70 00:00      
      Design Verification            01/01/70 00:00      
         one off            01/01/70 00:00      
      The meaning of "well"            01/01/70 00:00      

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