Multi-CPU device capable of automatically shutdown general purpose OS when feed from main power supply is interrupted
US6178515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1998 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Oct 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1441
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multi-CPU device capable of automatically carrying out normal shutdown of a general purpose OS when feed of a current from a main power supply is interrupted while being significantly reduced in manufacturing cost. The multi-CPU device includes a master CPU block mounted therein with a general purpose OS, a slave CPU block mounted therein with a realtime OS, and a unit for controlling a controlled equipment based on the realtime OS. The multi-CPU device also includes a UPS provided with a realtime OS interface. The realtime OS outputs a DC current from a battery to the master CPU block and slave CPU block when the service interruption sensing circuit of the UPS senses service interruption. The realtime OS interface outputs a service interruption sensing signal to the realtime OS, so that the realtime OS which detected service interruption shuts down the general purpose OS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.