Uncalibrated Input Termination

UltraScale Architecture SelectIO Resources User Guide (UG571)

Document ID
Release Date
1.14 English

The ODT attribute uses the following syntax in the XDC file:

set_property ODT RTT_48 [get_ports port_name]

to create a Thevenin equivalent to the circuit shown in This Figure

Figure 3-1:      Input Termination to VCCO using Single Termination

X-Ref Target - Figure 3-1


Uncalibrated split ODT is supported on all voltage-referenced I/O standards. Table: HD I/O Supported Standards defines the specific standards that are supported to use with this feature. The user-programmable input termination setting is implemented with a 96W pull-up and 96W pull-down to provide the equivalent 48W to VCCO/2 termination.