Method of booting an nfc device
AssigneeSTMicroelectronics International N.V.
InventorsPascal NONIER, Julien MERCIER
Life of this patent
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Abstract
This disclosure relates to a near field communication device powered by a radio frequency field, the NFC device including a boot control circuit configured to control, during a boot phase, the booting of the NFC device in response to the detection of an RF field, and a measuring circuit configured to estimate, during the boot phase, the strength of the RF field. The boot control circuit is further configured to adjust, during the boot phase, a voltage limitation level, a frequency level and/or a voltage supply level of one or more circuits of the NFC device, based on the estimated RF field strength, in order to modify the duration of the boot phase.
Claims15
A near field communication (NFC) device powered by a radio frequency field, the NFC device comprising:
- a boot control circuit configured to control, during a boot phase, booting of the NFC device in response to detection of an RF field;
- and
- a measuring circuit configured to estimate, during the boot phase, strength of the RF field, wherein the boot control circuit is further configured to adjust, during the boot phase, a voltage limitation level, a frequency level and/or a voltage supply level of one or more circuits of the NFC device, based on the estimated RF field strength, in order to modify duration of the boot phase.
An NFC communication system, comprising:
- a near field communication (NFC) device powered by a radio frequency field, the NFC device comprising:
- boot control circuit configured to control, during a boot phase, booting of the NFC device in response to detection of an RF field;
- and
- a measuring circuit configured to estimate, during the boot phase, strength of the RF field, wherein the boot control circuit is further configured to adjust, during the boot phase, a voltage limitation level, a frequency level and/or a voltage supply level of one or more circuits of the NFC device, based on the estimated RF field strength, in order to modify duration of the boot phase;
- and
- a reader device configured to emit the RF field.
A method of booting a near field communication (NFC) device powered by a radio frequency field, the method comprising:
- controlling, by a boot control circuit of the NFC device, during a boot phase, booting of the NFC device in response to detection of an RF field;
- estimating, by a measuring circuit, during the boot phase, strength of the RF field;
- and
- adjusting, by the boot control circuit, during the boot phase, a voltage limitation level, a frequency level and/or a power supply level of one or more circuits of the NFC device based on the estimated RF field strength, in order to modify a duration of the boot phase.
Dependencies are inferred from the claim text.