David VanHorn wrote:
>>
>>> And yes, adding resistors between the micro and the real world is always
>> a
>>> good idea, up to the point where the resistor begins to interfere with
>>> getting the job done.
>> Even between two micros on the same board?  Two more components to
>> assemble, two more points of failure?
> 
> 
> Protects against ESD, ringing, and radiated EMI.

I'm transferring at 9600 baud.  Aren't the latter two insignificant at 
such a low frequency?  Over two-inch traces?
-- 
Timothy J. Weber
http://timothyweber.org
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