Quartus II Settings File Reference Manual - Altera

Chapter 6: Fitter Assignments 6–277
PROGRAMMABLE_VOD
PROGRAMMABLE_VOD
Type
Implements control of programmable VOD. This option is ignored if it is applied to
anything other than an output or bidirectional pin, or a top-level design entity
containing output or bidirectional pins.
This option specifies a VOD setting for the true differential output buffer of a pin.
Since an input-only pin does not use true differential output buffer, this option is
ignored on such pin. This option is not supported on a pin with I/O standard which
uses single-ended output buffer such as LVTTL. Some differential I/O standards are
implemented with two single-ended output buffers and therefore this option cannot
be supported. Please refer to the family data sheet for which I/O standards support
programmable VOD. This option can only be supported on pin locations that support
programmable VOD. Dedicated programming pins, such as TDO, do not support
programmable VOD. 0 is the slowest VOD value. The higher the value the higher the
differential output voltage. The highest VOD value is family dependent. A pin using
this option should also use IO_STANDARD option.
Integer
Device Support
The value must be between these two numbers, inclusive: 0, 3
This setting can be used in projects targeting the following device families:
■ Arria II GX
■ Arria II GZ
■ Arria V
■ Cyclone IV GX
■ Cyclone V
■ HardCopy III
■ HardCopy IV
■ Stratix III
■ Stratix IV
■ Stratix V
Notes
This assignment supports wildcards.
This assignment is included in the Fitter report.
Syntax
set_global_assignment -name PROGRAMMABLE_VOD -entity
set_instance_assignment -name PROGRAMMABLE_VOD -to -entity
June 2012 Altera Corporation Quartus Settings File
Reference Manual