Day To Day Technology Updates: When pull-up is used?

Wednesday, February 1, 2012

When pull-up is used?

Pull-up is used when multiple (at least two or more) outputs share a single pin. For example, multiple outputs connected in a bus or a single pin is used as input as well as output pins between two devices. So, it can be summarized as 1) bus 2) bidirectional input/output pins 3) High speed communication buses will need tri-state and will use pull-ups.

http://en.wikipedia.org/wiki/Three-state_logic

http://wiki.answers.com/Q/What_is_Tri-state_logic

1 comment:

html5 video playerFebruary 29, 2012 at 2:00 PM
Thanks for sharing your info. I really appreciate your efforts and I will be waiting for your further write ups thanks once again. html5 player
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