A communication apparatus capable of preferentially selecting an address of a type having no lifetime set thereto or an address of a type having a lifetime which can be extended, depending on the use of the address to be selected. Subsequently, a metal thin film thinner than the base insulating film and made of only a metal element is formed on the base insulating film, and a protective film having humidity resistance and oxidation resistance is formed on the metal thin film. The reference circuit is adapted to provide a startup current, while the startup circuit receives the startup current and outputs an output voltage.