MULTI-FUNCTION CARD DEVICE

摘要

A multi-function card device (5) includes external connection terminals (13A, 13B), an interface controller (10), a memory (12), and a security controller (11) connected to the interface controller and the external connection terminals. The interface controller has a plurality of interface control aspects and controls the external interface operation and the memory interface operation by the control aspects in accordance with an instruction from outside. The external connection terminals has individual terminals individualized for the respective interface control aspects and common terminals which are shared. The common terminals include a clock input terminal, a power terminal, and a grounding terminal. The individual terminals include a data terminal and a dedicated terminal (13B) for the security controller. For several types of interface control aspects, the external connection terminals are partially shared and individualized, thereby guaranteeing the interface reliability and suppressing increase of the physical size. It is also possible to guarantee the security processing by the interface of the security controller alone.