公开(公告)号：US20190074051A1

公开(公告)日：2019-03-07

申请号：US15995187

申请日：2018-06-01

Applicant: MEDIATEK INC.

Inventor： Chia-Fu CHANG ,  Hsiang-I HUANG ,  Bo-Wei HSIEH ,  Szu-Ying CHENG ,  Yu-Hsien TSAI

IPC: G11C11/406

Abstract: A refresh control method for a memory system is provided. The memory system includes a dynamic random access memory with a register set and a memory cell array. The refresh control method includes the following steps. Firstly, a masking command or an unmasking command is issued, and thus the register set is updated. A first region of the memory cell array is set as a masked region according to the masking command. A second region of the memory cell array is set as an unmasked region according to the unmasking command. Then, a refresh command is issued to the dynamic random access memory. According to the refresh command, a refresh action is performed on the second region of the memory cell array.