HANDHELD DEVICE, SMART CARD INTERFACE DEVICE (IFD) AND DATA TRANSMISSION METHOD

摘要

A smart card interface device which can be installed in an expansion slot of a handheld device comprises: a host interface unit for connecting with I/O ports included in the expansion slot of the handheld device so as to receive/send serial communication data signals and clock signals from/to said I/O ports; a first smart card connector provided at a surface of said smart card interface device, for electrically connecting with a smart card of the first type; a first smart card interface unit for detecting whether a smart card of the first type has been connected to said first smart card connector and for driving the smart card of the first type being connected; a protocol implementation unit for controlling each component of said smart card interface device so as to implement communication protocols between said smart card interface device and said handheld device as well as between said smart card interface device and said smart card of the first type.