Power management fault strategy for automotive multimedia system
US6944779B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2000 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Sep 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/3203
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multimedia/personal computer-based system for operating information, communication, and entertainment devices in a mobile vehicle uses a power management strategy which reduces power consumption and boot-up time in a manner which facilitates use of a complex instruction set computing (CISC) processor system. A power management fault strategy detects fault conditions and restores proper operation without user intervention. A low power microprocessor off-board of the main motherboard switches a plurality of regulated voltages to the main motherboard and other devices. The main application microprocessor on the main motherboard sends periodic status messages to the low power microprocessor. Various strategies are provided for limiting attempts to correct a fault, monitor the state of the application microprocessor, and transition between states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.