An exemplary method for assembling a lens unit and a light-receiving unit into a camera module is provided. The supporting member has a base, a pillar extended from the base, and a shoulder and a head having a diameter larger than that of the pillar. A patterned polysilicon layer and a first dielectric layer are formed on a substrate. The decoder is to decode a first and second set of instructions that each specify one or more registers in the architectural register file.