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Altera_Forum's avatar
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...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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What is driving the wire when you put the FPGA pins in high impedance?

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The GPIO is connected to protoboard (flat cable). I didn't understand your question, but nothing is connected between pins and protoboard when are in high impedance.

https://www.alteraforum.com/forum/attachment.php?attachmentid=6918

FPGA >> PIN <> GPIO <> Protoboard