Non-contact IC card
First Claim
Patent Images
1. A non-contact IC card comprising:
- data transmission/reception emans for data transmission and data reception betwene an IC card and an external device via anelectromagnetic carrier wve having a first frequency, without direct contact bte3ween the IC card and exernal device;
data processing means connected to said data transmission/reception means for processign data received from he external device;
reset signal detecting means for detecting an electromagnetic wave having a second frrequency diffeent fromthe first frequency trasmited as a reset signal from the external device o the IC card without direct contct between the IC card and external device; and
initializing means for initializin said data processing means in responset o the detection of a reset dignal by said reset signal detecting means.
1 Assignment
0 Petitions
Accused Products
Abstract
A non-contact IC card includes a data transmission/reception circuit for data exchange between the IC card and an external device; a data processor connected to the data transmission/reception circuit; a reset signal receiving circuit for receiving a reset signal from the external device and an initializing circuit for initializing the data processor on the basis of the reset signal received by the reset signal receiving circuit.
70 Citations
9 Claims
-
1. A non-contact IC card comprising:
-
data transmission/reception emans for data transmission and data reception betwene an IC card and an external device via anelectromagnetic carrier wve having a first frequency, without direct contact bte3ween the IC card and exernal device; data processing means connected to said data transmission/reception means for processign data received from he external device; reset signal detecting means for detecting an electromagnetic wave having a second frrequency diffeent fromthe first frequency trasmited as a reset signal from the external device o the IC card without direct contct between the IC card and external device; and initializing means for initializin said data processing means in responset o the detection of a reset dignal by said reset signal detecting means. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A non-contact IC card comprising:
-
data transmission/reception means for data transmission and data reception between an IC card and an external device via a first electromagnetic carrier wave having a first frequency and a first magnitude, without direct contact between the IC card and external dvice; data procesing means connected to said data transmissionreception means for processing data received from the external device; reset signal detecting means for detecting an electromagnetic wave of the fist freqency and having a second magnitude greater than the first magnitude transmitted fro he external device to the IC card without direct contact between the IC card and external device, said data transmission/reception means and rest signal receiving means including threshold means for discriminating beween the first and second magnitudes and for generating a data signal whena first threhold is exceeded and of generating a reset signal when a second threshold is exceeded; and initilializing eans for initializing said dta processing means in response to he generatin of a reset signal by said reset signal detecting means. - View Dependent Claims (8, 9)
-
Specification