A circuit for setting one of a plurality of organization forms of an integrated circuit includes a detector circuit connected to an external connection of the integrated circuit. The external connection in at least one of the organization forms can be used for external communication of the integrated circuit. A signal can be impressed into a signal path connected to the external connection by the detector circuit. As a consequence, an output signal is generated at an output of the detector circuit. A control circuit sets one of the organization forms and receives the output signal of the detector circuit. One of the organization forms is set by the control circuit depending on the state of the output signal of the detector circuit. A module with a detector circuit can identify that organization form of the organization forms in which it is operated in the application.