Apparatus, memory device and method for storing parameter codes for asymmetric on-die-termination

An apparatus comprising:

• a plurality of signal pins, wherein the apparatus is connected to an external device through a signal line connected to a signal pin among the plurality of signal pins;
• an on-die termination (ODT) circuit connected to the signal line, the ODT circuit being set to a first ODT state;
• a mode register configured to store a first parameter code corresponding to a first operating condition of the ODT circuit and a second parameter code corresponding to a second operating condition of the ODT circuit;
• and
• a control circuit configured to:
• provide information indicating the first ODT state to the external device, and
• based on a determination made by the external device using the information indicating the first ODT state, set the ODT circuit to the first operating condition using the first parameter code in a symmetric ODT where a second ODT state of the external device corresponds to the first ODT state, and set the ODT circuit to the second operating condition using the second parameter code in an asymmetric ODT where the second ODT state of the external device is different from the first ODT state.