Electronic device powering
AssigneesSTMicroelectronics (Rousset) SAS, STMicroelectronics (Alps) SAS
InventorsAlexandre Tramoni, Patrick Arnould
Life of this patent
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Abstract
The present disclosure relates to an electronic device comprising: at least one universal integrated circuit card or at least one secure element and at least one power supply circuit for said card or secure element, said power supply circuit being connected to at least a first power supply voltage source of the electronic device and comprising a voltage detector adapted to determine whether said first voltage source provides a first power supply voltage different from a reference voltage; and at least one near field communication module adapted to enter an active mode whenever said voltage detector determines that said first supply voltage is different from the reference voltage.
Claims20
An electronic device comprising:
- at least one universal integrated circuit card (UICC) or at least one secure element;
- at least one power supply circuit for the UICC or secure element, the power supply circuit being electrically connected to a first power supply voltage source of the electronic device, the power supply circuit including a voltage detector configured to determine whether or not the first power supply voltage source provides a first power supply voltage different from a reference voltage;
- and
- at least one near field communication module configured to enter an active mode in response to the first power supply voltage being determined by the voltage detector to be different from the reference voltage, wherein the power supply circuit includes a first circuit including a voltage follower, a slew rate limiter, and a switch controlled by the first circuit.
A method comprising:
- determining, by a voltage detector of an electronic device, whether or not a first power supply voltage source provides a first power supply voltage different from a reference voltage, the electronic device including:
- at least one universal integrated circuit card (UICC) or at least one secure element;
- at least one power supply circuit for the UICC or secure element, the power supply circuit being electrically connected to the first power supply voltage source, the power supply circuit including the voltage detector, wherein the power supply circuit includes a first circuit including a voltage follower, a slew rate limiter, and a switch controlled by the first circuit;
- and
- at least one near field communication module;
- and
- entering, by the near field communication module, an active mode in response to the voltage detector determining the first power supply voltage is different from the reference voltage.
A method comprising:
- determining, by a voltage detector of a power supply circuit for a universal integrated circuit card (UICC) or a secure element, whether or not a first power supply voltage source provides a first power supply voltage different from a reference voltage, wherein the power supply circuit includes a first circuit including a voltage follower, a slew rate limiter, and a switch controlled by the first circuit;
- and
- switching, by a near field communication module, from a standby state or an inactive state to an active state in response to the voltage detector determining the first power supply voltage is different from the reference voltage, the switching including:
- starting components and circuits of an electronic device that includes the power supply circuit, the UICC or the secure element, and the near field communication module;
- and
- concurrently starting (1) software of the electronic device and (2) the UICC or the secure element.
Dependencies are inferred from the claim text.