A high side circuit includes at least one power device having a first non-drivable terminal connected to a supply voltage, at least one load connected between a second non-drivable terminal of the power device and ground, and driving circuitry. The isolation areas in the periphery of the pixel transistor section each have an insulating section formed higher than a surface of the semiconductor substrate. The user then selects every confidential portion of the text, and inputs corresponding replacement information. The output switch operates in the first operating mode when it is energized and in the second operating mode when said it is not energized. The charging data system then inserts duration information for the long duration session in the partial CDR based on the stored interim timestamps, and transmits the partial CDR to a correlation system. The compressordecompressor is available for decompressing the print data during a period since the data reception from the PC until a sheet of paper onto which an image is formed reaches a predetermined position.