Patent ID: 11915781
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 17:
18. An apparatus comprising:
an input/output (I/O) circuit connected to a signal pin, the I/O circuit including a first driver circuit having a first drive strength and a second driver circuit having a second drive strength different from the first drive strength;
a ZQ calibration control circuit connected to the I/O circuit,
wherein, based on the first drive strength being stronger than the second drive strength, the ZQ calibration control circuit is configured to:
determine a selected driver circuit from among the first driver circuit and the second driver circuit based on a comparison between the first drive strength and the second drive strength,
adjust a termination resistance of the signal pin by providing an adjusted ZQ calibration code to the selected driver circuit, and
provide a fixed ZQ calibration code to an unselected circuit from among the first driver circuit and the second driver circuit.