Microelectromechanical sensor device with improved management of a power-down condition

An electronic apparatus, comprising:

• a battery configured to generate an external power supply voltage;
• a microelectromechanical sensor device including:
• a detection structure;
• and
• electronic circuitry coupled to the detection structure, the electronic circuitry configured to receive, in a case where the microelectromechanical sensor device is powered, the external power supply voltage, the electronic circuitry including:
• a voltage regulator configured to generate a regulated voltage having a value different from the external power supply voltage;
• at least one voltage domain powered by the regulated voltage;
• a power supply management core configured to be always powered by the external power supply voltage in the case where the microelectromechanical sensor device is powered, and configured to control the voltage regulator to selectively interrupt the power supply of the at least one voltage domain to implement:
• a first power-down condition of the microelectromechanical sensor device in which the voltage regulator is disabled;
• and
• a second power-down condition of the microelectromechanical sensor device in which the voltage regulator is enabled to power the at least one voltage domain with the regulated voltage, the first and second power-down conditions being associated with absence of data acquisition or processing by the microelectromechanical sensor device,
• the power supply management core configured to automatically alternatively enable the first or the second power-down condition upon a first power-on of the microelectromechanical sensor device, as a function of a configuration signal;
• and
• a control unit configured to generate power supply management instructions for the power supply management core.

A power supply management method, comprising:

• receiving, by electronic circuitry of a microelectromechanical sensor device, an external power supply voltage in a case where the microelectromechanical sensor device is powered, the microelectromechanical sensor device including a detection structure coupled to the electronic circuitry, the electronic circuitry including a voltage regulator, at least one voltage domain, and a power supply management core;
• generating, by the voltage regulator, a regulated voltage having a value different from the external power supply voltage;
• powering, by the voltage regulator, the at least one voltage domain with the regulated voltage;
• controlling, by the power supply management core, the voltage regulator to selectively interrupt power supply of the at least one voltage domain to implement:
• a first power-down condition of the microelectromechanical sensor device in which the voltage regulator is disabled;
• and
• a second power-down condition of the microelectromechanical sensor device in which the voltage regulator is enabled to power the at least one voltage domain with the regulated voltage, the first and second power-down conditions being associated with absence of data acquisition or processing by the microelectromechanical sensor device;
• and
• automatically alternatively enabling, by the power supply management core, the first or the second power-down condition upon a first power-on of the microelectromechanical sensor device, as a function of a configuration signal.