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???
01/30/12 15:48
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 		 #185728 - Wrong idea
Responding to: ???'s previous message
Sorry, but it is a good idea to look through the FAQ pages here before starting with the design.

You do not have control of the GPIO while the processor is in the reset state. So you should consider inverting the logic for your relay driver so that the relays are idle when the processor is reset. The hw design should only allow the relays to activate when the processor is in control and the software have made an explicit request to draw the relays.

All external hardware connected to I/O pins of a processor has to be designed based on what happens during the time when the processor is powering up, or is held in reset state. For some hardware it doesn't matter if you get extra glitches.

List of 34 messages in thread
TopicAuthorDate
Power-On Port Status Problem            01/01/70 00:00      
   Wrong idea            01/01/70 00:00      
   you will not            01/01/70 00:00      
   you are not the only one            01/01/70 00:00      
   ATMEL be ashamed            01/01/70 00:00      
      No, YOU should be ashamed...            01/01/70 00:00      
      Nonsense!            01/01/70 00:00      
      PIC Does so            01/01/70 00:00      
         Oh really??            01/01/70 00:00      
            "Glitch" in the sense of kind of "setback in a plane"?            01/01/70 00:00      
   Try These Ideas            01/01/70 00:00      
   "Glitch"            01/01/70 00:00      
      what is not “ATMEL true”.            01/01/70 00:00      
      I think you are making excuses            01/01/70 00:00      
      Oh, boohoo!            01/01/70 00:00      
      What a bunch of fatty sausage...            01/01/70 00:00      
      "very easy problem"            01/01/70 00:00      
   Power-On Glitch            01/01/70 00:00      
      Nonsense - again            01/01/70 00:00      
      Please explain what the "power-on glitch" is ...            01/01/70 00:00      
      Into The Frying Pan            01/01/70 00:00      
      Power-on problem...            01/01/70 00:00      
      You are still blaming the tools            01/01/70 00:00      
   Design the hardware first.            01/01/70 00:00      
      do not Design the hardware first.            01/01/70 00:00      
   Power-On Glitch            01/01/70 00:00      
      that you had the worst possible reset circuit            01/01/70 00:00      
      RC-reset...            01/01/70 00:00      
      Sorry, double post, don't know why...            01/01/70 00:00      
         No, you're not the only one            01/01/70 00:00      
      Would I Hire?            01/01/70 00:00      
         incidentially            01/01/70 00:00      
   Power On satus Problem            01/01/70 00:00      
      echo, echo, echo            01/01/70 00:00      

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