Patent ID: 6572023
Filing Date: 2003-06-03
Classification: G06K

Abstract:
An integrated circuit card comprising:a contact terminal which is to be contacted with an external device and which receives a first control signal from the external device, the first control signal comprising a reset signal; a first control signal detection circuit which is coupled to the contact terminal, which detects the first control signal and which outputs a first detection signal; a coil which is to be magnetically coupled to the external device and which receives a second control signal from the external device; a second control signal detection circuit which is coupled to the coil, which detects the second control signal and which outputs a second detection signal; a mode direction circuit which receives the first and second detection signals and outputs a mode signal designating a contact-free mode and a contact mode, wherein the mode direction circuit outputs the mode signal designating the contact-free mode when the first detection signal is in an inactive state and the second detection signal is in an active state and wherein the mode direction circuit outputs the mode signal designating the contact mode regardless of the state of the second detection signal when the first detection signal is in the active state; and a processing circuit which receives the mode signal and which performs a predetermined operation based on the contact mode and the contact-free mode designated by the mode signal.