The flash memory card 1 constructed as above is applied to a system, for example, an such as information processing apparatus as shown in FIG. 10, the system including in addition to the flash memory card 1 mounting the flash memory 2, a CPU 16, a RAM 17, a ROM 18, a printer 19, a hard disk 20 and a floppy disk 21 which are connected to the memory card 1 through a card interface 15.