Data processing unit including central unit and peripheral unit driven by separate power supplies
US6711692B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2000 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | May 26, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing unit includes a first power supply consisting of a stable power supply, a central unit operating on the firsts power supply, a second power supply, a peripheral unit operating on the second power supply, an interface block for transferring an external signal to the peripheral unit, and a power-down detector operating on the first power supply and connected to the second power supply, for detecting a power down of the second power supply and for generating a signal informing of the power down when it occurs. This power down signal can prevent supply of the external input signal to the central unit. The data processing unit solves problems of conventional data processing units including separate central unit and peripheral power supplies in that an unexpected power down of the peripheral use power supply can cause malfunctions of the central unit because of, e.g., an undesired interrupt signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.