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Altera_Forum's avatar
Altera_Forum
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15 years ago

using fpga output pin as enable

Hi, I'm trying to use an FPGA output pin (through a pin header) as an enable for a switch. I've noticed that when the enable is "low", it's voltage is actually around 0.13 V with respec...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Be careful, there is no guarantee that it will stay that low on all the temperature range. As FvM said, if you want to ensure a low voltage, use an external switch. Don't rely on any adjustable parameter on the FPGA.