Environment sensing/control circuit

摘要

An environment sensing/control circuit for use in conjunction with an electronic subsystem. The invention is capable of sensing and controlling conditions of the environment of the subsystem. The invention is capable of being implemented as a stand-alone device or replicated numerous times in an integrated circuit. The invention identifies changes including intermittent changes, in the environment of the subsystem from a reference state, the reference state being dynamically determined by a processor. Upon detecting such a change, the invention signals the processor. The invention can also serve as a flexible interface for control signals from the processor to the subsystem.