Power supply controller for on-vehicle computer system

Abstract

Abstract PURPOSE:To decrease the power consumption of a microcomputer in an engine stop state of an automobile by using a prescribed computer to control the power supplies of other computers. CONSTITUTION:An on-vehicle computer system includes plural computers mounted on a single vehicle so that one or more units of these computers can work even in an OFF state of an ignition switch. In such a system, the prescribed one of those computers is defined as a host one and this host computer controls the power supplies of other computers (CPU1-CPUn). In other words, a prescribed one is selected out of those computers used for each purpose of applications to turn off the power supplies of other computers when the ignition switch is turned off. Thus the undesired power consumption is extremely reduced in an OFF state of the ignition switch.

Inventors

• 👤 Masanori Sugiyama
• 👤 杉山　昌典

Bibliographic Details