> Being a high voltage / high power transmitter engineer by trade, I don't > have much experience with digital processor stuff like the PIC. Could > someone explain how watchdog timer routines are typically implemented > and some general guidelines??? Probably, but not me. I personally don't find much use for the watchdog timer as a watchdog. The one time I needed a watchdog function in a safety-critical system, this needed to be performed by separate hardware that had its own sensor. This hardware could kill power thru totally independent means from the main operating processor. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads