The differential input buffer (IBUFDSE3) primitive is only supported in HP I/O banks (see the following figure). This UltraScale architecture specific primitive has functions similar to the IBUFDS_IBUFDISABLE and IBUFDS_IBUFDISABLE_XP5 along with controls for offset calibration and input buffer disable (IBUFDISABLE). The offset calibration feature is accessed using the OSC_EN[1:0] and OSC[3:0] ports. The VREF scan feature is not supported with this primitive.
Figure 1. IBUFDSE3 Primitive—Differential Input Buffer with Offset
Calibration (HP I/O Banks Only)
The differential input buffer (IBUFDSE3_XP5) primitive is only supported in XP5IO I/O banks.
Note: IBUFDSE3 and IBUFDSE3_XP5 I/O buffers have
similar functionality but are differentiated due to IBUFDISABLE functionality
differences. HP I/O banks drive the O pin Low when IBUFDISABLE is asserted High,
while XP5IO I/O banks assert the O pin High when IBUFDISABLE is asserted.