Quartus II Settings File Reference Manual - Altera

6–422 Chapter 6: Fitter Assignments
XSTL_INPUT_ALLOW_SE_BUFFER
XSTL_INPUT_ALLOW_SE_BUFFER
Type
Allows the pin with a Differential-XSTL IO-standard to be used with a single-ended
input buffer.
This option is a modifier of IO_STANDARD option with Differential HSTL/SSTL
I/O standards setting. This option is only available for families which implement
differential HSTL/SSTL input with true differential input buffer. If this option is on,
the Quartus II software implements differential HSTL/SSTL input with single-ended
input buffer with voltage reference. This option affects placment because it allows a
differential HSTL/SSTL input to be placed on a pin location which does not have
differential input buffer, but it also requires its reference voltage to be consistent with
other pins shared the same VREF pin.
Boolean
Device Support
This setting can be used in projects targeting the following device families:
■ Arria II GX
■ Arria II GZ
■ Cyclone III
■ Cyclone III LS
■ Cyclone IV E
■ Cyclone IV GX
■ HardCopy III
■ HardCopy IV
■ Stratix III
■ Stratix IV
Notes
This assignment supports wildcards.
This assignment is included in the Fitter report.
Syntax
set_global_assignment -name XSTL_INPUT_ALLOW_SE_BUFFER
set_global_assignment -name XSTL_INPUT_ALLOW_SE_BUFFER -entity
set_instance_assignment -name XSTL_INPUT_ALLOW_SE_BUFFER -to -entity
Quartus Settings File June 2012 Altera Corporation
Reference Manual