Buffer primitives allow you to do the following:
- Make a location assignment
- Make an I/O standard assignment
- Make a drive strength (current strength) assignment
- Make a slow slew rate assignment
- Enable bus-hold circuitry
- Enable a weak pull-up resistor
- Make an on-chip termination assignment to a bidirectional pin
from a lower-level entity
The following buffer primitives are available:
- ALT_BIDIR_BUF
- ALT_BIDIR_DIFF
- ALT_INBUF
-
ALT_INBUF_DIFF
- ALT_IOBUF
- ALT_IOBUF_DIFF
- ALT_OUTBUF
- ALT_OUTBUF_DIFF
- ALT_OUTBUF_TRI
- ALT_OUTBUF_TRI_DIFF
- CARRY_SUM
- CASCADE
- EXP
- GLOBAL
- LCELL
- LUT_INPUT
- LUT_OUTPUT
- OPNDRN
- SOFT
- TRI
- WIRE