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???
06/15/06 12:02
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#118343 - well it is the "Intel kluge" and a guess
Responding to: ???'s previous message
I was using a P89C51RD , I used the PWM(4) and that code worked well.
Now I use a P89C51RD2 and the system resets hitself exactly like the Watchdog was activated

well the PCA4 so called PCA4 watchdog is an "Intel kluge". A guess would be that the RD2, which is a 6 clocker, somehow get a different relationship between instruction cycle time and PCA clock.
Why the "Intel kluge"? ANY watchdog that can be disabled by simple means is no more a watchog than a one pound puppy.

The RD2 has a REAL watchdog, why not use it?

If I use the third PCA 3 instead of PCA 4 the system works.
the "Intel kluge" only apply to PCA4

Erik



List of 10 messages in thread
TopicAuthorDate
Strange behavior with P89C51RD2            01/01/70 00:00      
   well it is the "Intel kluge" and a guess            01/01/70 00:00      
   Remote Possibility            01/01/70 00:00      
      short            01/01/70 00:00      
         Please explain            01/01/70 00:00      
            answers erick            01/01/70 00:00      
               I take the WDTE is a zero, also ..            01/01/70 00:00      
                  Fixed !!!            01/01/70 00:00      
         The danger of I know            01/01/70 00:00      
            answers Eric            01/01/70 00:00      

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