I work with driving heating elements, and those can be very dangerous if
     the micro gets stuck while one is turned on.  A definite brownout circuit
     that pulls MCLR down always >>>>>>>halts the processor,<<<<<<<< and that's
     the insurance I need.

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     I decided to connect the reset line from the watchdog and micro to the
     heater control latch. Then a reset from any source would clear the heater
     control bits, and explicitly turn the heaters off.  This was an additional
     level of protection I decided was necessary.  My competeters product
     depends on the micro's power up routine to get the heaters turned off.
     What if the micro never re-starts???? lots of smoke.