IBUF_LOW_PWR Attribute

UltraScale Architecture SelectIO Resources User Guide (UG571)

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1.14 English

The IBUF_LOW_PWR attribute allows an optional trade-off between performance and power. This attribute is set to TRUE by default, which implements the input buffer in the lower-power rather than the higher-performance mode.


RECOMMENDED:   For receivers that are expected to operate at data rates ³1600 Mb/s, this attribute should be set to FALSE.

The change in power between high-performance and low-power mode can be estimated using the Xilinx Power Estimator (XPE) spreadsheet tool (download at www.xilinx.com/power).

The IBUF_LOW_PWR attribute is applied to the I/O buffer instance and uses the following syntax in the XDC file:

set_property IBUF_LOW_PWR TRUE|FALSE [get_ports port_name]

See the UltraScale Architecture Libraries Guide (UG974) [Ref 5] for information on accessing this attribute in UNISIM instantiation.