Patent ID: 7290716

Claim:
An IC card for insertion into a card slot of a host device, comprising: a radio frequency circuit; a flash memory chip; a plurality of signal pins, which are configured for connection to the host device inside the card slot and include a data pin that receives data from the host device; a controller chip, which (i) is separate from the flash memory chip; (ii) is configured to control access to the flash memory chip and to control the radio frequency circuit; and (iii) writes the data received through the data pin in the flash memory chip; and a connector, which (i) is connected to the radio frequency circuit; (ii) is attachable to and detachable from an antenna provided in the host device; (iii) is provided on a side of the IC card where the plurality of signal pins connect to the host device; and (iv) contacts the antenna inside the card slot if the IC card is inserted into the card slot, the radio frequency circuit being detached from the antenna if the IC card is removed from the card slot.