Quartus II Settings File Reference Manual - Altera

6–4 Chapter 6: Fitter Assignments
ALLOW_LVTTL_LVCMOS_INPUT_LEVELS_TO_OVERDRIVE_INPUT_BUFFER
ALLOW_LVTTL_LVCMOS_INPUT_LEVELS_TO_OVERDRIVE_INPUT_BUFFER
Type
Specifies whether the Fitter allows input pins with LVTTL or LVCMOS I/O standards
to be placed inside an I/O bank with a lower V CCIO voltage than the voltage specified
by the pins. Overdriving the I/O bank results in higher leakage current, which can
cause the design to not function as intended.
Boolean
Device Support
This setting can be used in projects targeting the following device families:
■ Arria GX
■ Cyclone
■ Cyclone II
■ HardCopy II
■ MAX II
■ MAX V
■ Stratix
■ Stratix GX
■ Stratix II
■ Stratix II GX
Syntax
set_global_assignment -name
ALLOW_LVTTL_LVCMOS_INPUT_LEVELS_TO_OVERDRIVE_INPUT_BUFFER
Default Value
Off
Quartus Settings File June 2012 Altera Corporation
Reference Manual