Russell McMahon wrote: > 5. What would you think of a processor that behaved like this? > I assume that in more normal circuits some of these will sometimes cause > problems. These problems would be hard to track down and there cause may > remain a mystery indefinitely. Short answer, I do not like it! I have had similar problems with reset circuits (from various manufacturers). In one case, adding bulk capacitance near the device *helped*. It seems (in that case) if there were a power droop immediately following the device coming out of reset (which happened due to everything else "waking up"), the reset logic would shut down thinking power had gone *bad*, and it would not come out of reset until power was shut down and restored (with faster rise time). Good Luck! David W. Gulley Destiny Designs -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads