In a multimedia information and control system for use in an automobile, at least one interface is employed which enables a user to access information concerning the automobile and control vehicle functions in an efficient manner. The cell barrier includes a body member and a fixing part disposed on the edge of the body member and connected to an adjacent cell barrier while housing a unit cell. The scaling value, when applied to the host clock, results in clock values that increase at substantially the same rate as the reference clock itself increases.