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Multitasking Pins

LABSPROJECT
Based on a Labs project | October 2011 | Find it here
The author has given some consideration to how to economise on pins, making them do the work of several. It occurred that one could exploit the high-impedance feature of a tri-state output. In this way the signal produced by the high-impedance state could be used for example as a CS signal of two ICs or else as a RD/WR signal.
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