There have been questions and comments on the list about what should you do
with the LVP pin on a PIC when using high voltage programming. Some people
say if the LVP fuse is turned off, it does not matter, others say it should
be tied to ground "just in case".

I'm using Wouter's WISP628, which uses HVP. I've had no problems
programming 16F877 and 16F876 PICs leaving the LVP pin floating (although I
normally connect it to the LVP line from WISP628).

However, I've just been having some problems with a 16F628 when I leave it
floating - sometimes programming works, other times it doesn't.

So it does appear that to be safe, the LVP pin should not be left floating,
but should be connected to ground (directly, or via some circuitry) "just
in case"

YMMV

Larry Bradley
Orleans (Ottawa), Ontario, CANADA

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu