Apparatus for autonomous security and functional safety of clock and voltages

An apparatus comprising:

• a divider communicatively coupled to a pin to receive a first clock external to a die;
• a multiplexer having a first input communicatively coupled to the pin, and a second input coupled to an output of the divider;
• an inductor-capacitor tank to provide a second clock;
• and
• a counter coupled to an output of the multiplexer and the inductor-capacitor tank, wherein the counter is to operate with the second clock and is to determine a frequency of the first clock.

A system comprising:

• a memory;
• a clock generator to generate a first clock;
• a processor coupled to the memory and the clock generator, wherein the processor includes:
• a multiplexer having a first input communicatively coupled to a pin to receive a first clock external to a die, and a second input coupled to an output of a divider;
• an oscillator to provide a second clock;
• and
• a counter coupled to an output of the multiplexer and the oscillator, wherein the counter is to operate with the second clock and is to determine a frequency of the first clock;
• and
• an antenna to allow the processor to communicate with another device.