ALT_OUTBUF_DIFF Primitive
The ALT_OUTBUF_DIFF primitive allows you to name
and connect positive and negative pins when a differential I/O standards Definition is applied
to an output pin. This primitive allows you to do the
following:
- Make a location assignment
- Make an I/O standards Definition assignment
- Make a drive strength (current strength) assignment
- Enable bus-hold circuitry
- Enable a weak pull-up resistor
- Make slow slew rate assignments
- Make an on-chip termination (OCT) assignment to an input pin from a lower-level entity
This primitive is available for CycloneIII and StratixIII device families only.
Note:
- Trying to set other parameters not listed in
the Parameters table on the
ALT_OUTBUF_DIFFprimitive results in errors. - For information about Quartus® Prime primitive instantiation, go to Using a Quartus® Prime Logic Function.