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Altera_Forum
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14 years ago

Need for two different I/O voltages on the same bank

I guess there's no solution for that, but I wanted to give a try anyway. So my situation is below. I'm using DE2-115 together with a Terasic LTM module on the GPIO port and a Texas Instruments ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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What would you do?

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A 50-ohm source termination and a 50-ohm end termination create a voltage divider 50/(50+50)* 3.3V = 3.3V/2 = 1.65V.

Viola!

A 1.65V clock should work fine with 1.8V logic.

Cheers,

Dave