Crystal

[NavMicroSystems]

Could someone help me to understand this discussion?

If I have a (in terms of timing) non critical application
and there is a PIC with INTRC-OSC running fast enough for what the program needs to do,
fine, this would save some board space.

If I need an external clock source anyway,I would not even think about RC.

BTW

for a prototype on a breadboard you could go even cheaper,
the capacitance of the breadboard in conjunction with a few drops of your favourite drink (as a resistor) at the right place on the board would also give a clock source.

But with this design don't ask us why your serial Comms are not working @ 115kbps

[leonel]

Yes, I can explain you this discussion...
One RC system it´s cheaper than a Crystal.
My system it´s not critical, I don´t need such an accurate timing, but I need accurate enough... For example in 9m50s I don´t mind having 9m47, but I do mind having 9m40s.
My doubt was if with one crystal I woul have 9m50s and with an RC 9m47.
If it was the case I would prefer an RC system, but I already see it isn´t.
Regards
Leonel Monteiro

[Melanie]

Then you might as well chose a PIC that has an internal oscillator and save yourself the bother of an external RC.

[leonel]

I already made my decision... I will chose a Crystal. As you said is much more accurate than the other one´s.
Thank you, and I´m sorry to NavMicroSystems, but today I´m with bad humor