Data processing device, IC card and communication system

A data processing device comprising:

• an antenna configured to transmit and receive a first signal to and from a first terminal device through wireless communication;
• and
• an integrated circuit connected to the antenna and configured to execute a process in accordance with the first signal, the integrated circuit including a terminal portion configured to transmit and receive a second signal to and from a second terminal device when coupled to the terminal portion,
• wherein the first signal has a carrier wave and a modulated wave generated by modulating an amplitude or a frequency of the carrier wave in accordance with data, wherein the second signal is a digital signal,
• wherein the integrated circuit comprises a transistor, wherein a first insulating film is over the transistor, wherein a first conductive film is over the first insulating film, wherein a second insulating film having a first opening is over the first conductive film,
• wherein a second conductive film is over a portion of the second insulating film,
• wherein a third insulating film having a second opening is over the remaining portion of the second insulating film and the second conductive film,
• wherein the first conductive film comprises an exposed surface where the first opening, the second opening and the first conductive film overlap one another,
• wherein the terminal portion comprises the first conductive film including the exposed surface for coupling the second terminal device and transmitting and receiving the second signal to and from the second terminal device,
• wherein the antenna comprises the second conductive film, and
• wherein the terminal portion includes a power supply terminal, a terminal electrically connected to a signal line and a protection circuit electrically connected to the power supply terminal and the signal line.