Buffer Primitives
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_INBUFALT_INBUF_DIFFALT_IOBUFALT_IOBUF_DIFFALT_OUTBUFALT_OUTBUF_DIFFALT_OUTBUF_TRIALT_OUTBUF_TRI_DIFFCARRY_SUMCASCADEEXPGLOBALLCELLLUT_INPUTLUT_OUTPUTOPNDRNSOFTTRIWIRE