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Altera_Forum
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12 years ago

Driver output impedance in Arria II GX for 3.3V LVCMOS / LVTTL I/O standard

Hello, I understand that ARRIA II GX does NOT support output serie resistor OCT (with or without calibration) for 3.3V I/O banks. Nevertheless, I have to adapt the impedance of the line but I...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

LVTTL has programmable drive strength which can be used to adjust the output impedance. There's no data sheet specification, but you can derive the expectable impedance range from the device ibis files.