Disclosed is an overhead rocker cam valve operating device for an internal combustion engine and which is particularly useful for race cars or high performance automobiles. The data processing apparatus includes prediction logic for generating a shift indication based on a prediction of the number of bit positions by which the data value needs to be shifted in order to normalize the data value. As long as the configuration information is not complete yet, the respective other storage means are accessed in case a self ID phase is initiated. A sense amplifier having a latch function is connected to a bit line. In some embodiments, flanges of each fitting define the interface so that the second sealing ring may be positioned between the flanges of each fitting.