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Altera_Forum
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16 years ago

False high inputs

Using a Cyclone II 2C20F484C7 fpga, and having some trouble with false high inputs. Basically if I have a switch connected, in other words an open line, it seems to default to reading it as a h...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Thanks for the explanation. I think the problem isn't particularly related to FPGA (except for the weak pull-up option). You can't use a single throw switch without an additional resistor to drive digital logic.