A surface cache stores pixel data on behalf of a pixel processing pipeline that is configured to generate screen tiles. The system can demultiplex an RF signal including at least two nested sets of FDM channels extending over a bandwidth B. The pulled-up pads and the power supply pad are electrically connected to a power supply terminal outside the chip via the internal exposed portions, the wires, and a power-supply-connecting external wire. The first band part comfortably comes into close contact with the forehead, providing wearer comfort.