Patent ID: 7765334

Claim:
A digital camera comprising: a Central Processing Unit (CPU) that controls the digital camera after a start-up process is carried out; a connection device connectable to a storage medium for storing information; a monitoring circuit, including a register and a timer, that monitors a connection status of whether the storage medium is connected to or disconnected from the connection device; and a communication device that enables said CPU to access a monitoring result stored in the register by the monitoring circuit when said CPU is turned ON in response to a user's power-on instruction, wherein said monitoring circuit monitors the connection status of the storage medium in response to a control signal at a predetermined time interval, which is determined by the timer, stores information of the disconnection in the register when the storage medium is disconnected from said connection device while said CPU is in the OFF state, and, until a user's power-on instruction, maintains said CPU in the OFF state and maintains the register and the timer in the ON state, wherein said communication device enables said CPU to acquire the information of the disconnection from the register by direct access to the register when said CPU is turned ON in response to the user's power-on instruction, and wherein said monitoring circuit continues monitoring the connection status of whether the storage medium is connected to or disconnected from the connection device, until the storage medium is disconnected from said connection device, and after the storage medium is disconnected from said connection device, said monitoring circuit stops monitoring the connection status of whether the storage medium is connected to or disconnected from the connection device and continues storing the information of the disconnection in the register to be acquired by direct access of the CPU when said CPU is turned ON.