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Jim Granville
09/16/14 17:01
Read: 905 times


 
#190351 - check EA and Pgm
Responding to: Aamir Ali's previous message
An active PSEN means either EA is low (forcing External code Access), or it has simply run past the 4K limit
(which it will do on a blank device)

Pgm a part with a 2 line ASM pin-toggle loop, to confirm you have correct ISP flows.


List of 7 messages in thread
TopicAuthorDate
PSEN outputting freq/code does not run      Aamir ALi      09/16/14 11:46      
   check EA and Pgm      Jim Granville      09/16/14 17:01      
      Done checking already      Aamir ALi      09/16/14 23:07      
   dollars to doughnots I bet      Erik Malund      09/17/14 15:10      
      any other reason/remedy      Aamir ALi      09/19/14 03:25      
         Reset circuit      Mahmood Elnasser      09/19/14 14:41      
         Have you read the datasheet?      Richard Erlacher      09/20/14 17:40      

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