Apparatus for providing an interrupt signal in response to a permanent or transient power failure
US4733366A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1983 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | May 16, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/0745
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Logic circuitry for use in electrical apparatus for providing an interrupt signal to a controller when there is a power failure in the electrical apparatus. The logic circuitry is connected to a bus from the controller. When the logic circuitry receives a power failure signal, it sets an interrupt state register and provides an interrupt signal on the bus as long as the interrupt state register is set. If the power failure signal no longer indicates a power failure, the logic circuitry responds to a signal from the controller indicating that the interrupt has been received by resetting the interrupt state register, thereby ending the interrupt. However, if the power failure signal is still active, the logic circuitry will not reset the interrupt state register in response to the signal from the controller. The logic circuitry is incorporated into a system having a plurality of individual electrical apparatuses, each of which is capable of generating an interrupt signal when it detects a power failure in itself, and a plurality of controllers, each controller having an associated bus connected to each individual apparatus such that the system can be configured to allow any selected …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.