Patent ID: 8189404
Filing Date: 2012-05-29
Classification: G11C

Abstract:
1. A storage device comprising: a first voltage supply unit for supplying a first working voltage to a control unit through a logic gate; a second voltage supply unit for supplying a second working voltage to each of N memory units through the logic gate, wherein N is a positive integer; a first voltage detecting unit, electrically connected to the first voltage supply unit, for detecting whether the first working voltage is normal; and a second voltage detecting unit, electrically connected to the second voltage supply unit, for detecting whether the second working voltage is normal; wherein once the first working voltage is abnormal, the logic gate outputs a first write protect signal to notify the control unit and control the N memory units to enter a write protect mode; once the second working voltage is abnormal, the logic gate outputs a second write protect signal to notify the control unit and control at least a part of the N memory units to enter the write protect mode.