Hi, CCK

External reset circuits are useful when you do not want to reset at the voltage given by the Brownout ... ( batt powered devices i.e. )

or if there is no brownout on the device !!!...

They may also be useful if you want particular power-on timings for peripherals ...

one other evident use is NOT to reset the processor, but enter a failsafe section on lowbatts ... with reset circuit connected to an " ordinary " pin !!!

MC 33x64 devices are great for that !!!

Alain