公开(公告)号：US20130114364A1

公开(公告)日：2013-05-09

申请号：US13670802

申请日：2012-11-07

Applicant: Elpida Memory, Inc.

Inventor： Kenichi SAKAKIBARA ,  Toru Ishikawa

IPC: G11C11/402

CPC classification number: G11C11/40626 ,  G11C11/40618 ,  H01L2924/0002 ,  H01L2924/00

Abstract: Disclosed herein is a device that includes a first semiconductor chip. The first semiconductor chip includes a first data storage area storing data, a first refresh circuit repeating a first refresh operation on the first data storage area to make the first data storage area retain the data, a first terminal supplied with a first control signal from outside of the first semiconductor chip, and a first control circuit coupled between the first terminal and the first refresh circuit to control a repetition cycle of the first refresh operation in response to the first control signal.