Re: Open drain and push-pull
From: CBFalconer (cbfalconer_at_yahoo.com)
Date: 12/30/03
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Date: Tue, 30 Dec 2003 05:09:30 GMT
Las wrote:
>
> Yes....I know.....basic......but I have to ask what this termology
> means in the form of changing a pin on a processor from an open
> drain to a push pull...thanks....
Think of a SPDT switch. The arm is the output pin. Connect the
lower terminal to ground, and leave the upper terminal open. You
have an open drain output. Connect the upper terminal to the plus
logic voltage. You have a push pull output.
+V (or open) ---------o 1
-----o-----------> output.
GND ------------------o 0
-- Chuck F (cbfalconer@yahoo.com) (cbfalconer@worldnet.att.net) Available for consulting/temporary embedded and systems. <http://cbfalconer.home.att.net> USE worldnet address!
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