The ODT attribute supports split or single termination on the inputs of the HSTL, SSTL, POD, and HSUL standards. The advantage of using ODT over discrete resistors is that signal integrity is improved by completely removing the stub at the receiver.
The ODT attribute is used to define the value of the on-die termination at the input for both DCI and non-DCI versions of the standards supported.
The VCCO of the I/O bank must be connected to the appropriate voltage level for the ODT attribute to perform as expected.
Note: For additional information, see Table: VCCO and VREF Requirements for Each Supported I/O Standard in Rules for Combining I/O Standards in the Same Bank for the VCCO levels required for I/O standards.
Allowed values for the ODT attribute:
Note: Not all values are allowed for all applicable I/O standards and configurations.
The ODT attribute uses the following syntax in the XDC file:
set_property ODT value [get_ports port_name]