Integrated circuit having a plurality of interfaces and integrated circuit card having the same
First Claim
1. An integrated circuit comprising:
- a plurality of eight electrical contacts conforming to ISO 7816 standards;
a first interface capable of communicating with a first host by utilizing no more than seven of the eight electrical contacts, using one or more ISO 7816 standard protocols;
a second interface capable of communicating with a second host by utilizing only one of the eight electrical contacts, said second interface not utilizing any of the electrical contacts utilized by the first interface, wherein the second interface communicates with the second host using a single wire protocol (SWP); and
a control block determining a voltage level of a contact connected to the second host at a first-occurring timepoint between a reference timepoint and a state transition timepoint of an external reset signal output from the first host.
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Accused Products
Abstract
An integrated circuit supporting a first interface and a second interface and an integrated circuit card having the same includes the first interface capable of communicating with a first host, the second interface communicating with a second host, and a control block. The control block activates the second interface when a voltage level of a contact that the second host can be connected is in a first state at a first-occurring timepoint between a reference timepoint and a state transition timepoint of an external reset signal output from the first host, and deactivates the second interface when the voltage level of the contact is in a second state. The integrated circuit card has the integrated circuit built in.
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Citations
15 Claims
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1. An integrated circuit comprising:
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a plurality of eight electrical contacts conforming to ISO 7816 standards; a first interface capable of communicating with a first host by utilizing no more than seven of the eight electrical contacts, using one or more ISO 7816 standard protocols; a second interface capable of communicating with a second host by utilizing only one of the eight electrical contacts, said second interface not utilizing any of the electrical contacts utilized by the first interface, wherein the second interface communicates with the second host using a single wire protocol (SWP); and a control block determining a voltage level of a contact connected to the second host at a first-occurring timepoint between a reference timepoint and a state transition timepoint of an external reset signal output from the first host. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An integrated circuit card comprising:
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a plurality of eight electrical contacts conforming to ISO 7816 standards; and an integrated circuit connected to the plurality of contacts, wherein the integrated circuit includes, a first interface capable of communicating with a first host through a first contact among the plurality of contacts using a ISO 7816 protocol; a second interface capable of communicating with a second host through a second contact among the plurality of contacts using a single wire protocol (SWP); and a control block determining a voltage level of the second contact at a first-occurring timepoint between a reference timepoint and a state transition timepoint of an external reset signal output from the first host, and deactivating the second interface selectively-based on a result of the determination, wherein the first interface is not capable of utilizing the second contact and the second interface is not capable of utilizing the first contact. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An integrated circuit comprising:
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a plurality of eight electrical contacts conforming to ISO 7816 standards; a first interface capable of communicating with a first host by utilizing no more than seven of the eight electrical contacts, using one or more ISO 7816 standard protocols; a second interface capable of communicating with a second host by utilizing only one of the eight electrical contacts and radio frequency (RF) communication, said second interface not utilizing any of the electrical contacts utilized by the first interface; and a control block determining a voltage level of a contact connected to the second host at a first-occurring timepoint between a reference timepoint and a state transition timepoint of an external reset signal output from the first host. - View Dependent Claims (15)
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Specification