Re: more on weird resets

On Sun, 31 Jul 2005, John Sheahan wrote:

> Peter wrote:
>> Put a 100 ohm resistor between your current circuit and MCLR and add a 
>> 220pF cap between MCLR and VDD directly at the chip. Also add a 5V6 zener 
>> between VDD and VSS.
>
> A piece of wire would work better.

You are basing this on what ? The solution I suggested addresses VDD 
line pumping by spikes and MCLR/VDD decoupling. Both of these preclude 
false resets caused by ground bounces, rfi and VDD supply pumping by 
glitches in IO lines. Also, where exactly would you place your highly 
conductive (as in conducting spikes and RFI) wire.

In my experience saving a flaky circuit can be hard and is in most cases 
non-intuitive. PIC based circuits are often saved by the solution I have 
indicated above.

Peter