Integrated circuit device with multiple communication modes and operating method thereof
First Claim
1. An integrated circuit device having an ISO communication mode and a non-ISO communication mode, the integrated circuit device comprising:
- a plurality of data lines comprising a first data line and a second data line;
a transceiver circuit coupled to the plurality of data lines; and
a means for determining whether or not the integrated circuit device is electrically connected to an external device in response to a voltage level signal on at least one data line at a power-up state;
wherein the integrated circuit device is set to any one of the ISO communication mode and the non-ISO communication mode within a predetermined time according to the voltage level and the integrated circuit device causes the external device not to recognize a connection state of the integrated circuit device for the predetermined time, and after the predetermined time, the integrated circuit device causes the external device to recognize the connection state;
wherein the voltage control circuit controls a voltage of the second data line to be equal to that of the first data line for the predetermined time, the voltage of the second data line being determined by the external device after the predetermined time.
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Accused Products
Abstract
An integrated circuit device having multiple communication modes is provided. The integrated circuit device includes a transceiver coupled to first and second data lines. The integrated circuit device further includes a voltage control circuit. The voltage control circuit determines whether or not an external device is connected to the integrated circuit device. In the case where the external device is connected to the integrated circuit device, the voltage control circuit controls the voltage of the first data line so as to cause the external device to not recognize the integrated circuit device for a predetermined time.
39 Citations
22 Claims
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1. An integrated circuit device having an ISO communication mode and a non-ISO communication mode, the integrated circuit device comprising:
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a plurality of data lines comprising a first data line and a second data line; a transceiver circuit coupled to the plurality of data lines; and a means for determining whether or not the integrated circuit device is electrically connected to an external device in response to a voltage level signal on at least one data line at a power-up state; wherein the integrated circuit device is set to any one of the ISO communication mode and the non-ISO communication mode within a predetermined time according to the voltage level and the integrated circuit device causes the external device not to recognize a connection state of the integrated circuit device for the predetermined time, and after the predetermined time, the integrated circuit device causes the external device to recognize the connection state; wherein the voltage control circuit controls a voltage of the second data line to be equal to that of the first data line for the predetermined time, the voltage of the second data line being determined by the external device after the predetermined time. - View Dependent Claims (2, 3, 8)
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4. An integrated circuit device having an ISO communication mode and a non-ISO communication mode, the integrated circuit device comprising:
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first and second data lines; a transceiver circuit coupled to the first and second data lines; and a voltage control circuit for determining whether or not an external device is electrically connected to the integrated circuit device in response to a voltage level on at least one data line at a power-up state, and controlling a voltage of the first data line according to the determination result, wherein, when the external device is electrically connected to the integrated circuit device, the voltage control circuit is set to any one of the ISO communication mode and the non-ISO communication mode within a predetermined time according to the voltage level, the voltage control circuit controls the voltage of the first data line so as to cause the external device not to recognize the integrated circuit device for a the predetermined time, and after the predetermined time, the voltage control circuit controls the voltage of the first data line so as to cause the external device to recognize the integrated circuit device; wherein the voltage control circuit controls a voltage of the second data line to be equal to that of the first data line for the predetermined time, the voltage of the second data line being determined by the external device after the predetermined time. - View Dependent Claims (5, 6, 7)
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9. An integrated circuit device an ISO communication mode and a non-ISO communication mode, the integrated circuit device comprising:
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first and second data lines; a transceiver circuit coupled to the first and second data lines; a first pull-up circuit coupled to the first data line; a second pull-up circuit coupled to the second data line; and a control circuit responsive to voltages of the first and second data lines, for detecting whether or not an external device is electrically connected to the integrated circuit device, wherein, when the external device is electrically connected to the integrated circuit device, the control circuit is set to any one of the ISO communication mode and the non-ISO communication mode within a predetermined time according to the voltages of the first and second data lines, the control circuit controls the first and second pull-up circuits so as to cause the external device to not recognize the integrated circuit device for a predetermined time, and after the predetermined time, the control circuit controls the first and second pull-up circuits so as to cause the external device to recognize the integrated circuit device; wherein the voltage control circuit controls a voltage of the second data line to be equal to that of the first data line for the predetermined time, the voltage of the second data line being determined by the external device after the predetermined time. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for operating an integrated circuit device, the integrated circuit device including an ISO communication mode and a non-ISO communication mode and communicating with an external device in any one of the ISO and non-ISO communication modes, the method comprising the steps of:
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determining whether or not the integrated circuit device is electrically connected to the external device in response to a voltage level on at least one data line; when the integrated circuit device is electrically connected to the external circuit, selecting any one of the modes the ISO communication mode and the non-ISO communication mode according to the voltage level; and indicating to the external device that the integrated circuit device is electrically connected to the external device, wherein, during the selecting any one of the communication modes, the integrated circuit device causes the external device not to recognize the integrated circuit device, and after the selecting, the integrated circuit device causes the external device to recognize the integrated circuit device; wherein the integrated circuit device comprises a first data line and a second data line; wherein the voltage control circuit controls a voltage of the second data line to be equal to that of the first data line for the predetermined time, the voltage of the second data line being determined by the external device after the predetermined time. - View Dependent Claims (17, 18)
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19. A method for operating an integrated circuit device, the integrated circuit device including an ISO communication mode and a non-ISO communication mode and communicating with an external device in any one of the ISO communication mode and non-ISO communication mode, the method comprising the steps of:
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determining whether or not the external device is electrically connected to the integrated circuit device in response to a voltage level on at least one data line; when the external device is electrically connected to the integrated circuit device, causing the external device to not recognize the integrated circuit device for a predetermined time; and causing the external device to recognize the integrated circuit device after the predetermined time; wherein the integrated circuit device comprises a first data line and a second data line; wherein the voltage control circuit controls a voltage of the second data line to be equal to that of the first data line for the predetermined time, the voltage of the second data line being determined by the external device after the predetermined time. - View Dependent Claims (20, 21, 22)
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Specification