Re: I want to make a PIC 16F877 comunicate with a serial PC port. Which crystal or other oscillator to use ?

For a realy cheap crystal, a 3.58Mhz color TV crystal with two 22pF cap.

You can interface (almost) directly the PIC with a PC. Most PC serial
interface accepts 0 to 5V signals, no need for negative supply or a MAX232.
The PIC output is connected through a 100 ohm resistor to the PC. The PIC
input through a 2K2 to 10K resistor and two clipping diodes right at the PIC
input, preferably two Schottky like 1N5817 or BAT85.

Ron

"Pedro Duarte" <[EMAIL PROTECTED]> a écrit dans le message de
news:[EMAIL PROTECTED]
> Hi !
>
> I would like to make a PIC 16F877 comunicate with a serial PC port.
>
> I read that some precision oscilator is required for this task : the
> internal and RC oscilation PIC modes are not suitable.
>
> So, could you recommend me any crystal / ressonator which is cheap an
> do the trick ? I don't want very fast baud rates ...
>
> Is it simple to interface the oscillator  with the PIC ?
>
> Thanks
>