A Complex-Functional Real-Time Clock Unit with a Battery-Powered Domain
A complex-functional block is presented in which a signal of a shape close to a meander is generated at the frequency of an external quartz resonator to control a real-time clock. The unit is a separate domain and can be powered, based on operating conditions, both from an external battery with a rated voltage of +3.0V, and from an external power source of the + 3.3V chip into which the unit is embedded. The complex-functional unit is designed for implementation using CMOS technology with design standards of 65 nm.