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Altera_Forum
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13 years ago

Cyclone IV - Using high impedance in GPIO

I have a project with 14 bidir. I use to test integrated circuits from college. i use the 36 gpio pins in a protoboard with a flat cable. but when i put the bidir in high impedance, all output...
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Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Since there isn't anything else driving the wire, when the bidir signals go into high-impedance state, the status present in the wire is "random".