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Altera_Forum's avatar
Altera_Forum
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10 years ago

Use different voltages on GPIO

Hi, Small summary: I am using GPIO ports on a Stratix-IV based board to interface it with a PCB that has an optical switch. I am using the GPIO ports to dynamically control the switches, by app...
Altera_Forum's avatar
Altera_Forum
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10 years ago

like flz47655 said, you may choose the IO standard which has the closest VIL and VIH threshold voltages by referring to the datasheet specs. You might also need to run signal integrity simulation to double check on the voltage swing as it will have dependency on your board setup.