An integrated circuit for controlling an alternator circuit in an
alternator regulator charging system. The integrated circuit includes a
first circuit for performing core regulation functions; a second circuit
having a mask selectable operation circuit that allows the integrated
circuit to select an operational mode thereof, the mode being selectable
from one of a stand-alone mode, a remote controlled mode wherein the
first circuit is controlled by an external circuit, and a combination of
the stand-alone mode and the remote controlled mode; and a third circuit
having an output driver circuit for controlling a field winding of the
alternator circuit.