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At 09:58 AM 4/7/00 -0700, Steven Rightnar wrote:
>I have seen it everywhere (pull all unused output lines to 5 volts). OK what
>if you dont do this? I have one curcuit that seemed to work fine and I did
>not pull the outputs up.

You don't have to pull outputs up, unless there's an input connected to
them somewhere, and it's open-collector.

Unused pins on a micro should be programmed as outputs, and there are
various cults as to wether they should be set high or low. I don't think it
really matters.

Unused Inputs should always be pulled, but which direction may matter,
check the data sheet.
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