An integrated more mode - circuit device, a smart card system and associated operation type selection of the method

摘要

An integrated more mode - circuit device on an integrated circuit substrate, with– a control circuit - or microprocessor unit (350), which in response to a mode select signal ox (usb _ mode) in a first, with the iso - 7816 - specification of the same mode of operation and in a second, by the iso - 7816 - specification of different operating mode is operable and during an operation of the type of detection of sampling signal (getdt) generates,– a plurality of input - / output terminals (301 to 307), of which one or more first input - / o ports (303) associated with the first operating mode and one or more second input - / o ports (304, to 305) are associated with the second operating mode, and– an operation type detector circuit (370), which, with at least one second input - / output port (301 to 307) is coupled and is carried out, a connection of the at least one second input - / output plug with an external device (210) to detect several times in succession at times, which in order from the operation of a type detection sampling signal (getdt) defined time interval are spaced apart from one another in order to produce an electrical characteristic of the external device to detect and the mode select signal ox (usb _ mode) of the control circuit - or microprocessor unit for..