Question

What is the functions of register in terms of digital electronics?

Answer 1

A Special Function Register  is aregister within a microprocessor, which controls or monitors various aspects of the microprocessor's function. Depending on the processor architecture, this can include, but is not limited to: ... subroutine return address.

Answer 2

A digital circuit is often constructed from small electronic circuits called logic gates. Each logic gate represents a function of boolean logic. A logic gate is an arrangement of electrically controlled switches. The output is an electrical flow or voltage, that can, in turn, control more logic gates.