|(hardware)||tri state - A feature of some digital electronic devices
which allows a connector (pin) to either act as a normal
output, driving a signal onto a line, or to be "tri stated" -
set to a high-impedance ("high Z") condition. This allows
other outputs to drive signals onto the line. Often the same
connector also functions as an input when its output circuitry
is tri stated.|
Tri-state outputs are typically used for the connection of several digital circuits to a shared bus onto which any one of them may output data for the others to input.