Real-Time Clock Device And Electronic Apparatus

A real-time clock device comprising:

• a resonator;
• a clock signal generation circuit that has an oscillation circuit causing the resonator to oscillate to generate an oscillation clock signal, and that outputs a time-counting clock signal based on the oscillation clock signal;
• a time-counting circuit that generates time-counting data based on the time-counting clock signal;
• an external signal input terminal to which an external signal is input;
• and
• a time-to-digital conversion circuit that measures a time difference between a transition timing of a first signal based on the external signal input from the external signal input terminal and a transition timing of a second signal based on the oscillation clock signal or the time-counting clock signal with a resolution higher than a time-counting resolution of the time-counting circuit, and obtains time difference information corresponding to the time difference.