An information processing apparatus is configured to communicate with an image forming apparatus. The electrical transformer utilizes a plurality of conductive elements disposed inside a hollow cavity used to embed two magnetic cores. A metallization layer is disposed on the microelectronic die back surface and the beveled sidewall. This may be preformed on a wire having a diameter of 2. , by irradiating the portion with ions or performing an isotropic etching process to reduce its thickness. The operating unit includes a USB device that transmits data to the controller and receives data from the controller via the transmission line, and the controller includes a USB host that transmits data to the operating unit and receives data from the operating unit via the transmission line.