System architecture for multiple input/output devices
US6005674A · kind A · utility
Inventor
Key dates
| Filing date | Feb 27, 1996 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Feb 27, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0015
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system or a board that interacts with a processor and multi I/O devices such as high-speed facsimile modems. The processor inputs/outputs data to I/O devices. Each I/O device includes an indicator, such as an Interrupt Request output, to signify a request that the I/O device will output or input data. If the indicator signifies a request, the processor will input data from or output data to the I/O device within a predetermined period Ti, in order to prevent the data from being lost. To this end, the new system or board includes a timer that periodically interrupts the processor and causes it to execute an interrupt service at a period T, where T<=Ti, whereupon the processor detects the indicators of I/O devices, and reads data from or writes data to any I/O device that signals a request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.