Title:
SEMICONDUCTOR STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/175392
Kind Code:
A1
Abstract:
The purpose of the present invention is to achieve a system for solving a row hammer issue without significantly increasing a DRAM chip area. A semiconductor storage device comprises: a memory unit including a plurality of memory cells; an address latch unit that receives an active command and an address therefor, and latches and holds the address every time the active command is received; a refresh control unit that, when receiving a refresh command, instructs a memory access control unit to carry out a regular refresh operation while instructing the memory access control unit to carry out an interrupt refresh operation for an address near the address latched by the address latch unit; and the memory access control unit that carries out the regular refresh operation and the interrupt refresh operation for the memory unit on the basis of the instruction from the refresh control unit.
Inventors:
YAMADA YASUTOSHI (JP)
OISHI AKIHISA (JP)
OISHI AKIHISA (JP)
Application Number:
PCT/JP2016/061582
Publication Date:
October 12, 2017
Filing Date:
April 08, 2016
Export Citation:
Assignee:
ULTRAMEMORY INC (JP)
International Classes:
G11C11/406
Foreign References:
| JP2015191676A | 2015-11-02 | |||
| JP2009059452A | 2009-03-19 | |||
| US20050035959A1 | 2005-02-17 |
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Download PDF:
Previous Patent: ILLUMINATING DEVICE AND ENDOSCOPE INCLUDING SAME
Next Patent: SOLAR POWER GENERATION SYSTEM
Next Patent: SOLAR POWER GENERATION SYSTEM