I know this has been covered before on an unrelated subject, but I am
trying to understand it better now.
Let's say I have one output on a micro (AVR) that is going to connect
to the inputs of 5 other micros. I know I should put a series
resistor between them - so one 1K resistor in series at the output pin.
Now at the inputs, I would pull the signals high with a 10K resistor.
The output signal is then connected to the Micro side of the pull up
resistor at the input pin (micros).
This works when going from one micro to another. However, when going
from one micro to more than one micro (inputs), I am puzzeled as to
what to do...
I could use one pull-up connected to all the input pins. This seems
to make the most sense.
But, for some reason I keep thinking I need a pullup on each of the
input pins.
I believe both would work fine, but one way has to be "Right" on way
has to be "Wrong".
Anyone care to clarify this situation for me?
Chris
