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Altera_Forum
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14 years ago

Cyclone III – VCCIO of unused banks

Is it possible to power down the VCCIO voltage on unused banks in Cyclone III devices? If Yes that which banks can be power down and what I must to do – leave unconnected VCCIO or connect they to GND...
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Altera_Forum
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14 years ago

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You could also supply Vccint to the unused banks...

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Daixiwen

“Could”? Maybe “must”? “PCG-01003.pdf” states: “All VCCINT pins must be connected to 1.2 V supply.”

For “power down” mode I switch off all Vccint, Vccd_pll, Vcca. In work mode I powered all Vccint, Vccd_pll, Vcca.

About Vccint – question: standby supply current is 0.9mA, I thought don’t apply power at all only for unused banks for decrease VCCIO standby current, used banks – always has 3.3V.

Regards, Alexander