The present invention provides an improved design of linear motor as well as an improved control strategy. The method involves mixing zinc particles with binders including preferably polyvinylalcohol, surfactant and water to form a wet paste. A memory is provided on the on-board controller for storing N loss parameters for the N input ports and M loss parameters for the M output ports. To fill the voids of the elastomeric layers and provide a smooth, flat playing surface, one or more fill layers of dry fill material, such as silica sand, may be formed over the elastomeric layers. The first command request is serviced in accordance with the determining step. The semiconductor device activates an input buffer circuit that receives an impedance control command to control an impedance of the data terminal even in the self-refresh mode so that the semiconductor device can change an impedance of the data terminal during the self-refresh mode.