公开(公告)号：US20230138561A1

公开(公告)日：2023-05-04

申请号：US17938214

申请日：2022-10-05

申请人： Samsung Electronics Co., Ltd.

发明人： Dongho SHIN ,  Jungjune PARK ,  Kyoungtae KANG ,  Chiweon YOON ,  Junha LEE ,  Byunghoon JEONG

IPC分类号： G11C7/10 ,  H03K19/00

摘要： An apparatus and method for ZQ calibration, including determining a strong driver circuit and a weak driver circuit, which are related to an input/output (I/O) circuit connected to a signal pin, at power-up of the I/O circuit; providing a ZQ calibration code related to a sweep code to one from among the strong driver circuit and the weak driver circuit according to ZQ calibration conditions; and providing a ZQ calibration code related to a fixed code to an unselected circuit, thereby adjusting a termination resistance of the signal pin.