Supplemental restraint controller

摘要

A supplemental restraint controller includes a main control portion and a safing control portion. In one example, the control portions communicate using one of pulse width modulation, frequency modulation or discrete digital signals. In one example, general input/output ports of an integrated circuit chip are used for establishing the communication between the main control portion and the safing control portion. In a disclosed example, the safing control portion includes an internal oscillator that provides cost savings and space savings.