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???
05/12/10 08:18
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#175831 - My guess is that mcu is running fast
Responding to: ???'s previous message
The AT89S8253 has a sfr called CLKREG.

So the LCD may be written twice as fast for a given XTAL.

The ISP programmer should also detect that the two devices have different identifying signature.

David.

List of 7 messages in thread
TopicAuthorDate
at89s8253            01/01/70 00:00      
   Datasheets!            01/01/70 00:00      
   What does not work??            01/01/70 00:00      
      look into both datasheets and see the differences!            01/01/70 00:00      
   what is "signature changes so fast"?            01/01/70 00:00      
      My guess is that mcu is running fast            01/01/70 00:00      
   migration document            01/01/70 00:00      

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