Patent ID: 7971791

Claim:
A multifunction card device comprising: a wiring substrate on which external connection terminals are formed; and a plurality of semiconductor chips mounted over the wiring substrate, the plurality of semiconductor chips including: a first semiconductor chip having an interface controller and coupled to the external connection terminals, and a second semiconductor chip having a memory and coupled to the interface controller, wherein the interface controller has a plurality of interface control modes for controlling an external interface action to an outside of the multifunction card device and a memory interface action to the memory, the interface controller being adapted to control the external interface action and the memory interface action by one of the interface control modes according to an instruction from outside of the multifunction card device, wherein the interface control modes include a first interface control mode, a second interface control mode and a third interface control mode, wherein the external connection terminals include first, second and third groups of terminals corresponding to the first, second and third interface control modes, respectively, and common terminals, wherein the common terminals include a clock input terminal, a power supply terminal and a ground terminal, wherein the first group of terminals includes four data terminals and a command input terminal, wherein the second group of terminals includes eight data terminals and a command input terminal, and wherein the third group of terminals includes four data terminals, an insertion/removal detection terminal and a bus status terminal.