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Altera_Forum
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15 years ago

Help about the connection between IC of voltage 5V and cyclone II

Now I've got a cyclone II(3.3v in doc) device.But I've only got a 5V D-A IC.Can I connect them directly?especially output from 5V IC input foot of cyclone II(3.3V in document).I know the signal outpu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi,

I agree with your thoughts and ALTERA in fact points to the problem of unconfigured state (by linking to the chapter of the device handbook). Maybe there were to many problems due to misuse (not observing the problem of unconfigured FPGA connected to 5V driven signals) as this design hint is only stated in Cyclone but not in CycloneII Handbook...

Carlhermann