On Fri, Mar 28, 2003 at 04:21:45PM -0500, Augusto Yipmantin - OA4CVT wrote:
> Hi all,
>
> Just some days ago have finished a board working with a PIC16F877, I am
> using the EpicWin and a homemade board to program the chip.
> I had some troubles using the RB3 pin as an IO port, in that way had to cut
> the connection with that pic and use the RB7.
> I tried for many times to set off the LVP option in the programmer to solve
> the problem but without luck.
> Is there another way to apply high voltage to that pic durin programation
> time ? May I do that in another way ?
> Regards,

Forgive me if I misinterpret your question. Without knowing how you did your
homemade board, I can only guess what's happening.

If you only have low voltage programming, then you cannot clear the LVP bit in
the config work. It's a safety precaution.

If you want to do high voltage programming, then you need to apply 13V to
the MCLR pin.

Only when programmed in high voltage mode can the LVP config bit be cleared.

BAJ

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