2 Replies Latest reply on Jun 2, 2011 11:31 PM by edmund.rapsevicius

    How to overdrive XRES

    edmund.rapsevicius

      My design uses an external power monitor/watchdog driving XRES for PUR and Watchdog functions. Unfortunately the Miniprog3 also uses XRES. Any suggestions on how to overdrive the external XRES signal (the watchdog will timeout during programming). I could use something like a resistor to isolate the external XRES, but I have no idea on the miniprog drive strength, and whether it can successfully overdrive in this mode.

        • 1. Re: How to overdrive XRES
          PushekM_21

           Hi Edmund,

             

           

             

          What is PUR to which you have referred here? Also, when you are talking about watchdog then whose watchdog timer you are talking about and how connectingt o XRES pin is helping. 

             

           

             

          Miniprog uses XRES pin for programming but PSoC3 does have a configurable XRES pin which can be used but I would like to know the functionality you are using here.

             

           

             

          Best regards,

             

          Pushek

          • 2. Re: How to overdrive XRES
            edmund.rapsevicius

            I need an external watchdof timer for extra security and to reset other devices includung the Psoc. I am using the MAX6301 for the timer, wired to XRES. Unfortunately XRES is also used by the programmer, hence my question, how do I overdrive the XRES so the watchdog does not interfere with the programmer?

               

            Ed