Contactless function chip for a smart card

A contactless function chip for supporting heterogeneous smart cards is provided to detect the kind of protocol mounted in a contact type smart card although any kind of contact type smart card is mounted in a mobile device, and transceive data between the contact type smart card and the contactless function chip according to the detected protocol, so that a user can conveniently use the contact type smart card without recognizing which specification is applied to the contactless function chip and the contact type smart card. A contactless function chip for supporting heterogeneous smart cards comprise the followings: a digital communication interface module(31) for transceiving data with a contact type smart card(20) in a digital type through at least one contact point; a protocol driving module(32) having at least one engine(32a,32b) for processing data according to a protocol mounted in the contact type smart card(20) by a control module(10) of a mobile device; and an analog communication interface module(33) for transceiving data with an RFID(Radio Frequency Identification) reader(50) in an analog type through an antenna(40) installed in the mobile device.