Non-contact IC card and method of initializing same
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United States of America Patent
Stats
-
Jul 5, 1994
Grant Date -
N/A
app pub date -
Jul 23, 1992
filing date -
Jul 24, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A non-contact type IC card includes a power-supply receiving device for receiving power through electromagnetic coupling with a terminal unit; a signal transmitting/receiving device for exchanging signals with a terminal unit; a signal processing device, connected to the power-supply receiving device and the signal transmitting/receiving device, for processing signals; and a resetting device, connected to the signal processing device, for resetting the signal processing device when there is no signal exchange. A method of initializing a non-contact type IC card which receives power through electromagnetic coupling with a terminal unit and which exchanges signals with the terminal unit includes measuring elapsed time from a signal exchange between an IC card and the terminal unit and resetting the IC card if no signal exchange occurs after the elapsed time exceeds a predetermined value.
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