Semiconductor memory device and access method and memory...

Details Semiconductor memory device and access method and memory... Semiconductor memory device and access method and memory...

2007-03-20

2007-03-20

Le, Vu A. (Department: 2824)

Static information storage and retrieval

Addressing

Plural blocks or banks

C365S230080

Reexamination Certificate

active

11201309

ABSTRACT:
A semiconductor memory device using inexpensive block access semiconductor memories for storage media and able to be treated like a usual randomly accessible system memory, including a first semiconductor memory and a second semiconductor memory, wherein the second semiconductor memory is a cache of the first semiconductor memory, the first semiconductor memory is accessed via the second semiconductor memory, there are a first address region and a second address region on logical memory addresses accessed from the outside, at least part of the second semiconductor memory is mapped to the first address region, and a function of controlling data transfer between the first semiconductor memory and the second semiconductor memory by accessing the second address region is provided, and an access method and a memory control system of the same.

REFERENCES:
patent: 5973964 (1999-10-01), Tobita et al.
patent: 6484246 (2002-11-01), Tsuchida et al.

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