If you pull the pin ( attached to the switch ) to ground through a 10K resi=
stor,
the programmer/debugger should be able to override the 10K resistor.
You can drive the LED with resistors and a transistor interposed to make th=
e impedance the
MCLR/RE0 pin sees as high as you want.
Gus in Denver


On 2015m02d20, at 15:02, Josh Koffman <joshybear@gmail.com> wrote:

Hi all,

I'm working on a design for the 18F25K22. Normally I like to dedicate
my PGD/PGC pins to ICSP usage only. I also generally use external
MCLR.

However, I'm really short on pins. 3 pins actually. I know I can use
PGD/PCG in circuit. I've never used them as inputs though. I realize I
will probably have trouble actually using the switches assigned to
them while debugging, but any other snafus? How do I provide for the
possibility that the switch might be closed, pulling the pin to ground
when I need to program/debug?

And how about an LED indicator on MCLR/RE0. Good or bad idea? Seems
like it should be ok, but I wanted to check to be sure.

Josh
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