A method is described for estimating cylinder charge using either the throttle position or mass air flow sensor. Also disclosed are method and apparatus for mounting a flexible printing plate. A press fit optical via interconnects the device level and the another device level. The tag array memory also including a memory array coupled to the input conversion circuit, the memory array to store the 2-hot vector; and an output conversion circuit coupled to the memory array, the output conversion circuit to receive the 2-hot vector and to convert the 2-hot vector back to the 1-hot vector.