Synchronous semiconductor memory

Details Synchronous semiconductor memory Synchronous semiconductor memory

2006-10-10

2006-10-10

Ho, Hoai V. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S230090, C365S236000

Reexamination Certificate

active

07120078

ABSTRACT:
In an FCRAM having a late write function, when a first command signal indicates “write active”, whether a write operation or an auto-refresh operation is to be performed is determined on the basis of a second command signal. For example, when the second command signal indicates “write”, a write operation for a memory cell is performed by a late write scheme. When the second command signal indicates “auto-refresh”, an auto-refresh operation is performed. In the last write cycle of a write operation immediately preceding this auto-refresh operation, addresses for selecting a memory cell as an object of auto-refresh are predetermined. After data write to a memory cell is completed in the last write cycle, row precharge for auto-refresh is performed. After that, an auto-refresh operation (i.e., a data read operation and a data restore operation) is performed for the selected memory cell.

REFERENCES:
patent: 3748651 (1973-07-01), Mesnik
patent: 4747082 (1988-05-01), Minato et al.
patent: 5446696 (1995-08-01), Ware et al.
patent: 6005823 (1999-12-01), Martin et al.
patent: 6088291 (2000-07-01), Fujioka et al.
patent: 6144617 (2000-11-01), Takai
patent: 6222785 (2001-04-01), Leung
patent: 6317852 (2001-11-01), Lau et al.
patent: 6426915 (2002-07-01), Ohshima et al.
patent: WO 98-56004 (1998-12-01), None
Yasuharu Sato et al., “Fast Cycle RAM (FCRAM); a 20-ns Random Row Access, Pipe-Lined Operating DRAM”, (VLSI Symp. 1998).

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