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Thread: 16f84 Question
www.piclist.com/techref/microchip/devices.htm?key=16F
picon face BY : wouter van ooijen & floortje hanneman email (remove spam text)



> I can't see now a simple switch to ground and a 10K pull up to Vcc and a
small
> capacitor are going to create voltage spikes below ground that can pump
> 80mA of current into the MCLR pin.  Even with a several inches of wire to
the
> switch I doubt there would be enough inductance about to cause problems.

The cap can!

> Is the MCLR input any different in this respect to other pins ?

Yes, it does not have the normal protection diode to Vcc (because it must
accept the ~14 V Vpp). I guess RA4 is similar.

Wouter van Ooijen

Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler for PIC uC's:  http://www.voti.nl/jal
PICs kopen? http://www.voti.nl/shop

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