Electronic apparatus and power supplying method

Details Electronic apparatus and power supplying method Electronic apparatus and power supplying method

2006-10-31

2006-10-31

Lee, Thomas (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C713S300000, C713S320000

Reexamination Certificate

active

07131018

ABSTRACT:
A system LSI contains a main circuit and an eDRAM. The main circuit contains a standby controlling circuit and a CPU. Each circuit block receives power through independent power lines. Power is always supplied to the standby controlling circuit. When the system LSI has entered a standby state, power to the main circuit is turned off. Only when the eDRAM is used, power is supplied thereto. The standby controlling circuit and a power controlling circuit control power supplied to each circuit block. When there is no task the CPU has to process, the system LSI enters the standby state from the operation state. When an operation input has taken place with an operating portion or when an input has taken place in an external input, the standby controlling circuit performs a process necessary for waking up the system LSI. Power is supplied to the main circuit.

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