PIC16F877A with 10MHZ quartz

Hello, i'm new to this forum,

I need to know what capacitor i should use with a 10mhz quarz and PIC16F877A, i'm using serial communication (with a PIC16F84A @ 4mhz) via SERIN-SEROUT i can use even the internal oscillator?

Thank you for any help,

Luca

Hi Luca,

Found this:

PIC16F87XA Data Sheet page 148
http://ww1.microchip.com/downloads/e...Doc/39582b.pdf

TABLE 14-2: CAPACITOR SELECTION FOR CRYSTAL OSCILLATOR
8 MHz = 15 - 33 pF
20 MHz = 15 - 33 pF
Note 1:
Higher capacitance increases the stability of oscillator but also increases the start-up time.

Someone else can help with the "SERIN-SEROUT with the internal oscillator" part.

-Adam-

So, do you think a 22pf would be fine?

thank you,

Luca

Welcome to the forum Luca.

Yes, 22pf sounds right.

-Adam-

I have used Serout2/Serin2 with the 16F676 at 9600 baud. 2400 baud is recommend though. The 16F676 runs at 4mhz internal.

Dave

Careful when you're using the internal OSC... recent post confirm that it's not always the best solution.. as already warn many times before.