Static information storage and retrieval – Powering – Data preservation
Reexamination Certificate
2005-03-15
2005-03-15
Elms, Richard (Department: 2824)
Static information storage and retrieval
Powering
Data preservation
C365S222000
Reexamination Certificate
active
06868029
ABSTRACT:
A logic portion outputs to a DRAM portion a start address and an end address indicating a memory region where data to be stored is present prior to transition to power down mode having reduced current consumption. In the power down mode, a refresh control unit holds the start address and the end address and controls refresh to be carried out for data only in a region requiring refresh. The power supply of the logic portion is set in off state in the power down mode and accordingly a semiconductor device can consume reduced current while holding data.
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Hidaka Hideto
Ishikawa Masatoshi
Kato Hiroshi
Ooishi Tsukasa
Tsuji Takaharu
Elms Richard
Nguyen Tuan T.
Renesas Technology Corp.
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