This present invention provides an ink jet printhead and method of delivering ink to the printhead. The transmissions include cams mounted on a common shaft, respectively coupled to the half-mold supports, to the mold base support and to the locks. An endpoint ready status bit may be set in the register in response to an endpoint ready message received at the downstream port. The electrode includes as an electrode material the polymer compound including a structure capable of intramolecularly forming at least one S\u2014S bond in the single side chain of the repeating unit thereof. The main-block selecting lines for connecting the main row decoder to the sub-row decoders are formed of the same interconnection layer as the plate lines and metal interconnections used between the memory cells in the cell block.