Self-refresh apparatus and method

Details Self-refresh apparatus and method Self-refresh apparatus and method

2005-09-27

2005-09-27

Nguyen, Tan T. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S233500

Reexamination Certificate

active

06950364

ABSTRACT:
The present invention relates to a self-refresh apparatus and method. In the self-refresh method according to the present invention, when a partial array self-refresh operation is performed on a bank, internal address is counted in a predetermined cycle corresponding to a refresh rate regardless of PASR types. The bank is selectively activated depending on the PASR types. As a result, errors of the refresh rate which result from a half of bank or quarter of bank self refresh operation can be prevented.

REFERENCES:
patent: 4933907 (1990-06-01), Kumanoya et al.
patent: 5270982 (1993-12-01), Watanabe
patent: 2004/0093461 (2004-05-01), Kim
patent: 2003091989 (2003-03-01), None

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