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Altera_Forum
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14 years ago

Can VREF be other than VCCIO/2?

Must VREF be equal to 1/2*VCCIO, or can it be, say, 2/3*VCCIO? BTW, I'm using a Cyclone III M164 package. (very small physical board constraints) I'm trying to interface to a chip that has...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Shorted outputs are the most popular reason for excessive current consumption, I would check the pinout file against the schematic in a first step. Also check all supply voltages and - if possible - determine which supply pins are sinking high current.

If it's your own PWB, also wiring and solder faults should be considered.