Semiconductor device

Details Semiconductor device Semiconductor device

2007-10-19

2009-08-11

Nguyen, Tuan T (Department: 2824)

Static information storage and retrieval

Read/write circuit

Having particular data buffer or latch

C365S189011, C365S230030

Reexamination Certificate

active

07573753

ABSTRACT:
A semiconductor device capable of accessing to the memory with a high speed, and including a memory with a large capacity. The semiconductor device includes a plurality of memory banks (Bank)1to3where the write cycle time is twice as long as the read cycle and each provided with the separate write and read ports, and two cache data banks CD0and CD1, in which, for example, in the case that an external write instruction with continuous cycles is issued in cycle #2, the data of Bank2stored in CD1, Row2cannot be written back since Bank2is busy with the cycle #1, the data of Bank0stored in CD0, Row2can be written back instead.

REFERENCES:
patent: 5617347 (1997-04-01), Lauritzen
patent: 5825682 (1998-10-01), Fukui
patent: 7203794 (2007-04-01), Ji et al.
patent: 7219185 (2007-05-01), Luicki
patent: 7236421 (2007-06-01), Eldridge et al.
patent: 2001/0040827 (2001-11-01), Dosaka et al.
patent: 2004/0225829 (2004-11-01), Akiyama et al.

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