Static information storage and retrieval – Powering – Data preservation
Reexamination Certificate
2005-07-05
2005-07-05
Nguyen, Van Thu (Department: 2824)
Static information storage and retrieval
Powering
Data preservation
C365S227000, C365S154000, C700S082000
Reexamination Certificate
active
06914845
ABSTRACT:
A power control unit activates a control signal ST for a circuit block to be set to a standby state before turning off power of the circuit block or a whole chip, and saves an operation result of data processing of the circuit block into a memory unit. When the power is again supplied to the circuit block in the standby state, the power control unit activates a control signal RES after the power supply is started and restores the data saved in the memory unit to the circuit block. Flip-flops in the circuit block are connected in series when the saving or restoring of data is performed, and perform a data transfer operation with a path different from that in a normal operation. Therefore, a semiconductor device can be provided which can rapidly transit to a standby mode having reduced current consumption while holding internal information.
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Le Toan
Nguyen Van Thu
Renesas Technology Corp
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