ADAPTIVE VOLTAGE SCALING SYSTEM FOR OUT OF CONTEXT FUNCTIONAL SAFETY SoC

A method comprising:

• comparing each supply voltage of a set of supply voltages with a select one of a plurality of trim values;
• generating a set of power OK signals based on the comparing operations;
• providing a reset signal;
• masking the set of power OK signals by applying the set of power OK signals and a set of mask signals to AND circuitry such that a response of the reset signal to the set of power OK signals is inhibited;
• updating the trim values while the response of the reset signal is inhibited;
• and
• unmasking the set of power OK signals.

A system comprising:

• a voltage detector including multiple voltage level detectors configured to output multiple power OK signals, respectively;
• a trim adjustment circuit configured to output multiple trim values to the multiple voltage level detectors, respectively;
• and
• a sequencer circuit coupled to the trim adjustment circuit and the voltage detector, wherein, in response to receiving the power OK signals from the multiple voltage level detectors, the sequencer circuit is configured to control output of a reset signal to a target voltage domain.