Patent ID: 7772886

Claim:
A device for backing up the configuration of terminals of a low-power integrated circuit, the device including: at least one voltage level shift unit, which includes a voltage level shift circuit and a memory cell for storing an output state of a unit function, the voltage level shift circuit including an input stage that receives a data or control signal, and which is powered by a regulated internal voltage and a part for transferring the output state of a unit function according to the state of the data or control signal, which is powered by a supply voltage of the integrated circuit, said transfer part of a state of a function being connected to the input stage for voltage shifting the data or control signal provided at input stage, and an output stage powered by the integrated circuit supply voltage, which is connected to the output of the voltage level shift unit and connected to at least one external contact pad of the integrated circuit, wherein the backup device includes several voltage level shift units connected to the output to the output stage, the voltage level shift units each including a memory cell powered by the supply voltage and controlled by a same storage signal, for storing the output voltage state of a specific function of the respective level shift unit in an idle mode of the integrated circuit where the regulated voltage is cut off.