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Altera_Forum
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8 years ago

Cyclone IV configuration from 1.8V SoC

I want to configure a Cyclone IV part (EP4CE10F17C7) using passive serial mode from an onboard processor. The processor's I/O pins are all 1.8V logic level. I would think this would be fine if I se...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Yes - you can configure Cyclone IV devices in PS mode at 1.8V.

A few gotchas to note. MSEL pins are tied to GND or VCCA, which needs to be powered at 2.5V. Also, CONF_DONE lives in bank 6. So it's pull-up resistor should be connected to the supply for bank 6, not bank 1.

Cheers,

Alex