The ALT_BIDIR_BUF primitive allows you to make
low-level assignments with the altddio_bidir megafunction.
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
- Make a slew rate
assignment to the bidirectional pin connected to the altddio_bidir
megafunction
- Make an on-chip termination assignment
- Enable bus hold circuitry
- Enable weak pull up resistor
This primitive is available for CycloneIII and
StratixIII devices only.
The ALT_BIDIR_BUF primitive is not supported by
AHDL.
Note: - This primitive can be used only with an
altddio_bidir megafunction.
- Trying to set other parameters not listed in
the Parameters table on the ALT_BIDIR_BUF
primitive results in errors.
- For information about Quartus® Prime Standard Edition primitive
instantiation, see Using
a Quartus® Prime Standard Edition Logic Function.