Patent ID: 8079660

Claim:
An electronic apparatus comprising: a plurality of attachment portions to which a plurality of semiconductor storage devices, each of which includes an access determination unit that determines whether the semiconductor storage device is accessed, an input terminal and an output terminal used for connection checking, a normally-closed switching element that electrically disconnects the input terminal from the output terminal when the access determination unit determined that the semiconductor storage device is accessed, and a bypass circuit that electrically connects the input terminal to a reference point through predetermined impedance, are arranged in a predetermined order; signal lines used to connect the plurality of semiconductor storage devices which are attached to the plurality of attachment portions to one another by bus connection by electrically connecting each of input terminals of the plurality of semiconductor storage devices to corresponding one of output terminals the adjacent semiconductor storage devices as daisy-chain connection, the signal lines being used to access the semiconductor storage devices; a power supply line that supplies power to the input terminal serving a beginning point of the daisy-chain connection through predetermined impedance; a reference point connection line that electrically connects the output terminal serving as an end point of the daisy-chain connection to the reference point; a voltage detection unit that detects a voltage between the input terminal serving as the beginning point and the reference point; an access execution unit that successively accesses the plurality of semiconductor storage devices; a first voltage detection unit that detects a voltage between the input terminal serving as the beginning point and the reference point every time the access execution unit accesses one of the semiconductor storage devices; and an attachment-position determination unit that determines whether the plurality of semiconductor storage devices are properly attached to the corresponding plurality of attachment portions in accordance with the voltage detected using the first voltage detection unit.