>>
In my understanding, BODEN will hold the chip in reset if Vcc is too low.
Its thresholds are set unconditionally to be compatible with 5v, so if you
attempt to run at 3.3, BODEN will always hold the chip in reset.

It would have been more useful to have a BODEN_3.3 and BODEN_5.0, or maybe a
BODEN with an adjustable threshold, but Microchip did not do it that way.

Can someone else back me up on clearing BODEN for 3.3v designs? I may be out
on a limb here.
<<

You are right.  You can't use the brownout detect feature with "low voltage"
designs because it will detect a brown out even though the power supply is
correct.

However, this guy's problem runs much deeper.  He is using the PIClist as a
substitute for reading the manual.  Not knowing about brown out detect is a
legitimate problem a newbie might stumble over, but attempting to run a 5V
chip at 3.5V without ever checking the electrical specs is just plain stupid
or lazy.  This is true of ANY chip, even a simple inverter.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.