UltraScale Architecture SelectIO Resources User Guide (UG571)

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1.14 English

The IBUFDS_IBUFDISABLE primitive shown in This Figure is a differential input buffer with a disable port that can be used as an additional power saving feature for periods when the input is not used.

Figure 1-26:      Differential Input Buffer with Input Buffer Disable (IBUFDS_IBUFDISABLE)

X-Ref Target - Figure 1-26


The IBUFDS_IBUFDISABLE primitive can disable the input buffer and force the O output to the internal logic to a logic-Low when the IBUFDISABLE signal is asserted High. The USE_IBUFDISABLE attribute must be set to TRUE, the IBUFDISABLE port must be controlled, and SIM_DEVICE set to ULTRASCALE for this primitive to have the expected behavior that is specific to the UltraScale architecture. This feature can be used to reduce power whenever the I/O is idle.