Control circuit and electronic device using the same

摘要

An electronic device (100) connected to an external storage device (200) and stores data transmitted from the storage device (200), the electronic device (100) comprising a power supply (10), a control circuit (20) and a storage unit (30). The power supply (10) supplies a voltage to the storage unit (30) via the control circuit (20). The control circuit (20) comprises a protection unit (203). The control circuit (20) generates a first control signal when the output voltage of the protection unit (203) is less than a working voltage of the storage unit (30), and generates a second control signal when the output voltage of the protection unit (203) is at least a working voltage of the storage unit (30). The storage unit (30) is disabled in response to the first control signal, and enabled in response to the second control signal.