AVR-Chat

At 08:46 AM 1/4/2005, Lasse Madsen wrote:

>While we are at it (EMI) one should probertly also connect a 10nF 
>capacitor to the last unused XTAL2 output to balance the pierce.

That would be bad. There's nothing to balance in this case, you're just 
using the xtal sections as amplifiers.  I would fuse the slaves for 
external osc though, it will take less power. (not sure if the output 
remains active then though. I've never tried that config)


>On the MASTER a 1Mohm between XTAL1/2 and a series resistor from XTAL2 to 
>crystal of a hundred ohms is a good idea…

Why?

>take output from XTAL2 pin directly through a second resistor (100R) to 
>the XTAL1 pin of a slave…
>

This part I agree with, you'll find that your trace impedance is roughly 
100 ohms-ish.