Patent ID: 7471015
Filing Date: 2008-12-30
Classification: G11B

Abstract:
1. An electronic apparatus comprising: a main micro processor; a auxiliary micro processor communicating with the main micro processor; peripheral devices which are controlled by the main micro processor and the auxiliary micro processor or which operate the main micro processor and/or the auxiliary micro processor; a power supply circuit which generates at least an electric power to activate the main micro processor, the auxiliary micro processor, and the peripheral devices; and a power switch which is switched on/off by a user to provide an instruction to supply/cut off the electric power to the main micro processor and the peripheral devices; wherein the main micro processor transmits a power control data, which indicates a power control method for controlling the electric power supply to the main micro processor and the peripheral devices; and the auxiliary micro processor controls the electric power supply to the main micro processor and the peripheral devices by a power control method which is indicated by the power control data transmitted from the main micro processor; wherein the auxiliary micro processor stores power control data into a mask ROM (Read Only Memory) in the auxiliary micro processor preliminarily as default data; and until power control data are transmitted from the main micro processor after starting the electric power supply to the auxiliary micro processor, the auxiliary micro processor controls the electric power supply to the main micro processor and the peripheral devices using the default data.