Dual frequency HF-UHF identification device, in particular of the passive type

Dual frequency RF identification device comprising an HF antenna for receiving an HF electromagnetic field, an HF interface, an UHF antenna for receiving an UHF electromagnetic field, an UHF interface, non-volatile memory means, device reset means, a power generator and a power management unit, the HF interface being arranged for carrying out an HF protocol and the UHF Interface being arranged for carrying out an UHF protocol;

• wherein the non-volatile memory means are formed at least by a first non-volatile memory and a second non-volatile memory, the identification device being arranged so that the first non-volatile memory can be powered and be in an active state without activating the second non-volatile memory, the first non-volatile memory consuming substantially a first power in a read mode and the second non-volatile memory consuming substantially a second power in a read mode, the second power being substantially higher than the first power;
• wherein the first non-volatile memory comprises all data needed for a device configuration allowing this device to carry out at least a communication mode of said UHF protocol, this communication mode having access to the first non-volatile memory but not to the second non-volatile memory, the first non-volatile memory further comprising all attributes needed for a configuration of said communication mode;
• wherein the power management unit is arranged for detecting:
• a first determined power level provided by said power generator and required for said communication mode of the UHF protocol to be carried out by the device,
• at least a second determined power level provided by said power generator and substantially higher than the first determined power level, this second determined power level being required for a communication mode of said HF protocol with an access at least to said second non-volatile memory to be carried out by the device;
• wherein the device is further arranged for allowing said configuration of said communication mode of the UHF protocol and then an execution of this communication mode when the power provided by the power generator is equal or superior to the first determined power level, and wherein the device is arranged for allowing a full activation of the HF Interface together with the second non-volatile memory only when the power provided by the power generator is equal or superior to the second determined power level.