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

Claim 5:
6. The apparatus of claim 5, wherein the ZQ calibration control circuit further includes:
the register, which is configured to store the first fixed code and the second fixed code; and
a second selector configured to provide a first ZQ calibration code signal to the first pull-up driver circuit and a second ZQ calibration code signal to the second pull-up driver circuit,
wherein the second selector is further configured to:
based on the code selection signal having the first logic level, output the first sweep code as the first ZQ calibration code signal and the second fixed code as the second ZQ calibration code signal, and
based on the code selection signal having a second logic level, output the first fixed code as the first ZQ calibration code signal and the second sweep code as the second ZQ calibration code signal.