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???
01/13/11 09:27
Modified:
  01/13/11 09:29
Read: times


 		 #180548 - this is a quite tricky question...
Responding to: ???'s previous message
Generally, in '51 the interrupt flags are writable by software, and if set to 1, they trigger the respective ISR.

IE0 and IE1 differ in that they work as registers only if the external interrupt is set to be edge-triggered, by setting the respective ITx bit. Otherwise, the read value of IEx is determined by the current state of respective pin, and writes are ignored.

JW

PS. Those who marked the original post as -1 Did not search first, please point to a document which clearly describes this behaviour for writing into IEx flags.

List of 28 messages in thread
TopicAuthorDate
What happen if I write 1 to Interrupt flag register?            01/01/70 00:00      
   which register??            01/01/70 00:00      
   Be specific about ur queries            01/01/70 00:00      
   if 8051            01/01/70 00:00      
   the register            01/01/70 00:00      
      this is a quite tricky question...            01/01/70 00:00      
         congrats, Robin            01/01/70 00:00      
         Re: tricky question            01/01/70 00:00      
         it was me,            01/01/70 00:00      
         Didn't search first            01/01/70 00:00      
            read "the bible"            01/01/70 00:00      
            the truth is...            01/01/70 00:00      
               it does state            01/01/70 00:00      
               I take this back...            01/01/70 00:00      
                  Disagree            01/01/70 00:00      
      Atmel hardware manual            01/01/70 00:00      
         I'll take the answer as :            01/01/70 00:00      
            Be Careful            01/01/70 00:00      
               oh, they do            01/01/70 00:00      
            re: I don't even know what "bible" you all mention in the po            01/01/70 00:00      
               "bible"            01/01/70 00:00      
            Diving into the AT89S52            01/01/70 00:00      
               just a note            01/01/70 00:00      
                  Re: just a note            01/01/70 00:00      
                     MIDI project, etc            01/01/70 00:00      
   oh, and we forgot to ask the usual question:            01/01/70 00:00      
      since i do not know what 'that' is I guess            01/01/70 00:00      
      SWI            01/01/70 00:00      

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