Semiconductor memory device for use in multi-chip package

摘要

Provides is a multi-chip package including a plurality of semiconductor memory devices. Each of semiconductor memory devices includes a register and a control circuit. The register is configured to store start sequence information representing start of execution of a refresh operation in the multi-chip package. The control circuit is configured to control start of the execution of the refresh operation in response to the start sequence information stored in the register. Since the start of the execution of the refresh operation is performed in sequence of respective semiconductor memory devices according to the start sequence information stored in the register, consumption of peak current may be reduced in a power saving mode.

主权项

1. A method for a refresh operation of a multi-chip package including a plurality of semiconductor memory devices each having different chip identification information, the method comprising:
receiving a refresh command from an outside of the multi-chip package; and for each semiconductor memory device, performing a refresh operation based on the refresh command, wherein performing the refresh operation starts at different times for each semiconductor memory device in response to the respective chip identification information, and wherein the respective chip identification information is received from an outside of the multi-chip package, and the respective chip identification information is stored in a mode register or in a fuse circuit of each of the semiconductor memory devices.