Visteon Global Technolgoies, Inc.

Vincent Messina

David Paul Wright

John Frank Konstantine

Douglas Alexander

A multimedia/personal computer based system for operating information, communication, and entertainment devices in a mobile vehicle uses a power management system which provides power to volatile ram during engine startup. During engine startup, battery voltage decreases to a point that most electronic devices can not function and may be harmed. A low power microprocessor off-board of a main processor board, which is a complex instruction set (CISC) processor system, switches a primary voltage regulator, which provides a plurality of regulated voltages to the main processor board, off to reduce power requirements. The main processor board stores a state of predetermined peripheral devices in volatile ram and then turns the devices off. The main processor then goes into a suspend mode awaiting a wake up signal from the low power microprocessor. A secondary voltage regulator turns on to supply power to the volatile ram when the primary voltage regulator is turned off.

Automotive computer system and method whereby responsive to detecting engine cranking main processor enters a suspend mode and current state of devices are stored in volatile memory

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Saline, MI, United States of America

Vincent Messina