> I've got an importante question to ask you all.
> Is it possible to accelerate the init time of the power-on of the pics?
> (pic 16c54 for exemple) I need an init time less than 1 ms.

If you use an RC oscillator, you can get a very fast reset time.  Power-on
will still be limitted, but may still be better than with a crystal or
ceramic resonator.