SelectIO Interface Primitives

The Vivado Design Suite library includes an extensive list of primitives supporting many I/O standards available in the I/O primitives. These generic primitives can each support most of the available single-ended I/O standards.

•IBUF (input buffer)

•IBUF_ANALOG (input buffer specific to system monitor inputs). The IBUF_ANALOG is used by the Vivado Design Suite tools to route analog signals to the SYSMONE1 or SYSMONE4 primitive. It is not a physical buffer and is purely a software construct that should be viewed as a physical pass through.

•IBUF_IBUFDISABLE (input buffer with buffer disable control)

•IBUF_INTERMDISABLE (input buffer with buffer disable and on-die input termination disable controls (HR I/O banks only))

•IBUFE3 (input buffer with offset calibration and V_REF tuning, along with buffer disable control (HP I/O banks only))

•IOBUF (bidirectional buffer)

•OBUF (output buffer)

•OBUFT (3-state output buffer)

•IOBUF_DCIEN (bidirectional buffer with input buffer disable and on-die input termination disable control (HP I/O banks only))

•IOBUF_INTERMDISABLE (bidirectional buffer with input buffer disable and on-die input termination disable control (HR I/O banks only))

•IOBUFE3 (bidirectional buffer with offset calibration and V_REF tuning, along with input buffer disable and on-die input termination enable control (HP I/O banks only))

These generic primitives can each support most of the available differential I/O standards:

•IBUFDS (differential input buffer)

•IBUFDS_DIFF_OUT (differential input buffer with complementary outputs)

•IBUFDS_DIFF_OUT_IBUFDISABLE (differential input buffer with complementary outputs and buffer disable)

•IBUFDS_DIFF_OUT_INTERMDISABLE (differential input buffer with complementary outputs, input buffer disable and on-die input termination disable control (HR I/O banks only))

•IBUFDS_IBUFDISABLE (differential input buffer with buffer disable control)

•IBUFDS_INTERMDISABLE (differential input buffer with input buffer disable and on-die input termination disable control (HR I/O banks only))

•IBUFDSE3 (differential input buffer with offset calibration along with buffer disable control (HP I/O banks only))

•IBUFDS_DPHY (differential input buffer for the MIPI D-PHY. Only supported by the HP I/O banks in the Virtex UltraScale+, Kintex UltraScale+, and Zynq UltraScale+ devices)

•IOBUFDS (differential bidirectional buffer)

•IOBUFDS_DCIEN (differential bidirectional buffer with on-die input termination disable control and input buffer disable (HP I/O banks only))

•IOBUFDS_DIFF_OUT (differential bidirectional buffer with complementary outputs from the input buffer)

•IOBUFDS_DIFF_OUT_DCIEN (differential bidirectional buffer with complementary outputs from the input buffer with on-die input termination disable controls and input buffer disable controls (HP I/O banks only))

•IOBUFDS_INTERMDISABLE (bidirectional buffer with on-die input termination disable control and input buffer disable (HR I/O banks only))

•IOBUFDS_DIFF_OUT_INTERMDISABLE (bidirectional buffer with complementary outputs from the input buffer with on-die input termination disable control and input buffer disable (HR I/O banks only))

•IOBUFDSE3 (differential bidirectional buffer with offset calibration along with input buffer disable and on-die input termination enable control (HP I/O banks only))

•OBUFDS (differential output buffer)

•OBUFTDS (differential 3-state output buffer)

•OBUFDS_DPHY (differential output buffer for the MIPI D-PHY. Only supported by the HP I/O banks in the Virtex UltraScale+, Kintex UltraScale+, and Zynq UltraScale+ devices)

•HPIO_VREF (V_REF scan feature (HP I/O banks only))

More information including instantiation techniques and available attributes for these and all other design primitives is available in the UltraScale Architecture Libraries Guide (UG974) [Ref 5].