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AWrithingMassOfFlesh's avatar
AWrithingMassOfFlesh
Icon for Occasional Contributor rankOccasional Contributor
4 years ago
Solved

Cyclone IV E: EP4CE22F17C8 I/O pins misbehaving

Hi All, I am developing with the Cyclone IV E: EP4CE22F17C8. I am observing anomalous behavior from two of the I/O pins on the chip. I have pin A11 configured as a general purpose output, howe...
  • AWrithingMassOfFlesh's avatar
    AWrithingMassOfFlesh
    4 years ago

    I found the issue. I was assigning the wrong pins. I was supposed to be driving A12 instead of A11 and L13 instead of L14.

ak6dn's avatar
ak6dn
Icon for Regular Contributor rankRegular Contributor
4 years ago

Are you doing this on a development board, or your own custom PCB design?

I have a TerAsic DE0-NANO development board which uses that same part (just a different speed grade) and I use those same I/Os as 3.3V LVTTL no problem.