Static information storage and retrieval – Powering – Data preservation
Reexamination Certificate
2006-08-01
2006-08-01
Phung, Anh (Department: 2824)
Static information storage and retrieval
Powering
Data preservation
C365S226000
Reexamination Certificate
active
07085188
ABSTRACT:
In a semiconductor memory device which has a plurality of operation modes and can reduce a consumed electric current by carrying out the switching control of an internal signal for every operation mode by required minimum control, a control method thereof, and a control method of a semiconductor device, there are provided an address switching circuit13for propagating either a refresh address ADD (Ref) from a refresh counter14at a time of a refresh mode or an external address ADD (R/W) at a time of data-input/output mode as internal address ADD (INT), a mode discriminating circuit11for discriminating between a refresh operation requesting signal REQ (Ref) and a data input/output requesting signal REQ (R/W) and for outputting a mode discriminating signal M, and a switch holding circuit12for outputting a switch change-over signal SW in accordance with the mode discriminating signal M, and the connection of the address switching circuit13is switched only at a time of a mode change.
REFERENCES:
patent: 6215714 (2001-04-01), Takemae et al.
patent: 6324113 (2001-11-01), Tomita
patent: 6525988 (2003-02-01), Ryu et al.
patent: 6678206 (2004-01-01), Chu et al.
patent: 6826109 (2004-11-01), Nakahara et al.
Arent & Fox PLLC
Phung Anh
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